Alstom MX3IPG2A User manual

MX3IPG2A
Multiple-Function Protection for Generator
(R< - Ucc< - Ucc>)
TECHNICAL MANUAL MDE/C133 2561 001
ABCD

blank page

pag. 3
MDE/C133 2561 001
MX3IPG2A
CONTENTS
1.TECHNICALDATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.GENERALCHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Selecting rated values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Underresistance protection (rotor ground) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Overcurrent protection (input I) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Undervoltage protection (diagnostics - input U) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Overvoltage protection (diagnostics - input U) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.5 Direct undervoltage protection (input Ucc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.6 Direct overvoltage protection (input Ucc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.7 Main and spare settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.ADDITIONALFUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Output circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 LED signalling circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.4 Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.5 Additional timers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.6 Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.7 Event logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.8 Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.9 Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.10 Alphanumeric user identifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.11 Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.12 LCD settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.13 Inhibiting operation - Deconfiguration via network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.14 Serial communication on LONWORKS (TM) bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.15 RS485 serial communication and MODBUS protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.16 Fault recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.17 Checking tripping circuits for continuity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.LOCALINTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.LCDMENUSTRUCTURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1MAINREADINGMENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1.1 Change dialogue language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1.2 Change date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1.3 Display settings in use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1.4 Display main settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1.5 Viewing spare settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.6 Display current and stored measured values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.7 Viewing counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.8 Viewing events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.9 Display output relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1.10 Viewing digital inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1.11 Display LED's. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1.12 Viewing relay data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1.13 Diagnostic display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2MAIN SETTING CHANGE MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2.1 Select current settings group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2.2 Change main settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.3 Change spare settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.4 Set output relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2.5 Set digital inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.2.6 LED Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.2.7 Set alphanumeric code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.2.8 LCD back-lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.3 TEST MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

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MDE/C133 2561 001
MX3IPG2A
7.APPLICATIONANDUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.INSTALLATION-TRANSPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.1 ESD Electrostatic charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.2 Acceptance - storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.3 Assembling and connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.SETTINGTHEUNITATWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.1 Safety regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.2 Checking nameplate ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.3 Final test with gauging of the attachment X2/IPG2A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
APPENDIX A - Network data exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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MDE/C133 2561 001
MX3IPG2A
100
1000
10000
012345
Capacità [microf]
Soglia [Ohm]
1.TECHNICALDATA
This device belongs to the Modulex 3 line and digitally proc-
esses the currents and voltages injected into the rotor winding
of synchronous machines, through the use of the attachment
X2/IPG2A, to provide a rotor ground protection besides a
number of additional functions, among which are the direct
over- and undervoltage monitoring (Vaux control).
The user interface is available locally through a display unit,
andremotely,throughaLONWORKS(TM) fieldbuswithacontrol
and monitoring system.
It is furthermore capable of communicating with a Personal
Computer through a connector located on the relay front and
an interface programme. This feature makes it easier and
safer to programme the setting parameters and configure and
read the set values, measurements and logged events; the
programming can also be taken from previously created files.
Protectivefunctions:
minimum resistance with two thresholds
with definite time operating characteristic
injected overcurrent with one threshold
with definite time operating characteristic
injected undervoltage with fixed threshold
with fixed time operating characteristic
injected overvoltage with fixed thresholds
with fixed time operating characteristic
direct undervoltage with two thresholds
with definite time operating characteristic
direct overvoltage with two thresholds
with definite time operating characteristic
possibility of two groups of settings, namely main and
spare
Measurement functions:
resistance values stated in Ω
injected current value stated in A
injected voltage value stated in V
direct voltage values stated in Un
injected overcurrent value stated in A
logging of the latest 8 events with storage of tripped
thresholds values, date, time and injected current and
direct voltage values as measured when the fault showed
up
fault recorder: recording, for 2.5 s in all, of the instant values
(12 samples per period ) taken by the input quantities
(Iinjected,Vinjected,Vdirect), as well as of the 19 logical
states among which digital inputs and additional timers are
found
RCE logging: recording of the latest 32 changes of state
(withrelateddateandtime);only available through PCorvia
network. .
Otherfunctions:
selection of the setting range of the direct voltage thresh-
olds by means of internal jumpers
selection of the rated frequency between 50Hz and 60Hz
selection of dialogue language (Italian, English, French
and Spanish)
self-monitoring with detailed indication of fault and alarm
type through LED's and "normally energized" output relay
(X6)
possibility of serial communication both with a local PC or
via a LONWORKS (TM) field bus
three auxiliary timers available free for allocation to digital
inputs
possibility of assigning one or more device functions to
each output relay and LED
possibility of separately setting all output relays as "all
normally energized" or "all normally normally de-energized"
possibility of selecting, for each output relay and LED, the
monostable or bistable (hand-reset) operating mode
possibility of assigning a minimum pulse width to each
output relay
opto-insulated digital inputs programmable for lockout,
drive and reset functions, each input being enabled by
normalenergizingorde-energizing. Optionally, theymaybe
used to supervise the tripping circuit for continuity
a partial and a total counter per trip threshold
MINIMUM RESISTANCE PROTECTION (rotor ground)
Settings
first threshold R<: 200÷4000Ω/ OFF
starting signalling delay tstart: 0.00 ÷ 9.99 s
definite time trip delay t1: 0.05 ÷ 600 s
second threshold R<<: 200÷4000Ω/ OFF
starting signalling delay tstart: 0.00 ÷ 9.99 s
definite time trip delay t2: 0.05 ÷ 600 s
threshold settings step: 1
time setting step: 0.01
threshold variation as a function of variation occurring between winding
and mass:
Capacity [µµ
µµ
µF]
Threshold [ΩΩ
ΩΩ
Ω]

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MDE/C133 2561 001
MX3IPG2A
OVERCURRENTPROTECTION
measurement range: 0 ÷ 1.2 A
Settings
threshold I~>: 0.01÷0.10 A / OFF
starting signalling delay tstart: 0.00 ÷ 9.99 s
definite time trip delay t3: 0.05 ÷ 600 s
threshold settings step: 0.001
time setting step: 0.01
UNDER/OVERVOLTAGE PROTECTION (diagnostics)
undervoltage threshold : 28 V
trip delay : 2 s
overvoltage threshold : 52 V
trip delay : 2 s
DIRECTUNDER/OVERVOLTAGEPROTECTION
rated voltage (jumper in S20) Un: 30 ÷ 300 V
rated voltage (jumper in S21) Un: 3 ÷ 30 V
rated voltage (jumper in S22) Un: 0.3 ÷ 3 V
rated voltage (jumper in S23) Un: 0.03 ÷ 0.3 V
first undervoltage threshold U-<: 0.5 ÷ 1.2 Un / OFF
starting signalling delay tstart: 0.00 ÷ 9.99 s
trip delay t4: 0.02 ÷ 600.00 s
second threshold di minima tensione U-<<: 0.5 ÷ 1.2 Un / OFF
starting signalling delay tstart: 0.00 ÷ 9.99 s
trip delay t5: 0.02 ÷ 600.00 s
first overvoltage threshold U->>: 0.5 ÷ 1.2 Un / OFF
starting signalling delay tstart: 0.00 ÷ 9.99 s
trip delay t6: 0.02 ÷ 600.00 s
second overvoltage threshold U->>: 0.5 ÷ 1.2 Un / OFF
starting signalling delay tstart: 0.00 ÷ 9.99 s
trip delay t7: 0.02 ÷ 600.00 s
settings step: 0.01
ADDITIONALSETTINGS
rated frequency fn: 50 or 60 Hz
minimum pulse width of end relays timp: 0.02 ÷ 1 s
additionaltimer tX1: 0.02 ÷ 600 s
additionaltimer tX2: 0.02 ÷ 600 s
additionaltimer tX3: 0.02 ÷ 600 s
Auxiliary power supply
MX3IPG2A.11, .61 and .71 versions Uaux: 19 ÷ 100 Vcc
Uaux: 19 ÷ 72 Vca
MX3IPG2A.12, .62 and .72 versions Uaux: 64 ÷ 300 Vcc
Uaux: 64 ÷ 275 Vca
X2/IPG2Aattachment Uaux: 10 ÷ 315 Vca
frequency for Uaux in c.a.: 47 ÷ 63 Hz
burden(minimum/maximum)ind.c.: 5 W / 10 W
burden(minimum/maximum)ina.c.: 10VA / 20VA
burden of X2/IPG2A attachment in c.a.: 5 VA
Output contact rating
rated current: 5 A
breaking power (110 Vcc; L/R= 40 ms; 105operations): 0.3 A
make and carry for 0.5 s: 30 A
mechanical durability: 106operations
Digital inputs
MX3IPG2A.11, .61 and .71 versions
UauxINDIG: 19 ÷ 100 Vcc
maximum series lead resistance: 8.8 kohm
with additional external resistor, rated 4.7 kohm 2 W 30 ÷ 150 Vcc
with additional external resistor rated 18 kohm 7 W
50 ÷ 300 Vcc
MX3IPG2A.12, .62 and .72 versions
UauxINDIG: 64 ÷ 264 Vcc
maximum series lead resistance: 48kohm
with additional external resistor rated 6.8 kohm 1 W 75 ÷ 300 Vcc
Errors of measuring equipment
Resistance threshold
relative error: ≤3 % of set value (with min. value 20 Ohm)
consistency : ≤ 1 % of set value
Current threshold
relative error: ≤3 % of set value + 0.005 A
consistency: ≤ 1 % of set value + 0.005 A
Voltage thresholds
relative error : ≤2.5% + 1 V
consistency : ≤1% + 1 V
Direct voltage thresholds
relative error (selector Un: S20): ≤3% (minimum 1 V)
(selector Un: S21): ≤3% (minimum 100 mV)
(selector Un: S22): ≤3% (minimum 10 mV)
(selector Un: S23): ≤3% (minimum 1 mV)
relative error : (selector Un: S20): ≤1% (minimum 1 V)
(selector Un: S21): ≤1% (minimum 100 mV)
(selector Un: S22): ≤1% (minimum 10 mV)
(selector Un: S23): ≤1% (minimum 1 mV)
Error variation
as frequency varies within the range ± 5% fn
and with ≤5% distortion factor
Current threshold
relative error: ≤ 1 % of set value + 0.0025 A
Voltage threshold
relative error : ≤1% + 1 V
as temperature and Uaux vary within the operating range
Current threshold
relative error: ≤ 0.5% of set value + 0.001 A
Voltage threshold
relative error : ≤0.5% + 1 V
Direct voltage threshold
relative error (selector Un: S20): ≤0.5% (minimum 1 V)
(selector Un: S21): ≤0.5% (minimum 100 mV)
(selector Un: S22): ≤0.5% (minimum 10 mV)
(selector Un: S23): ≤0.5% (minimum 1 mV)
for asymmetric values
transient overreach: ≤5%
Time errors
relative error on definite times: ≤3% or 20 ms
consistency on definite times: ≤1% or 20 ms
Variation of time errors
as temperature and Uaux vary within the operating range
relative error on definite times: ≤0.5% or 10 ms
Other characteristics
reset ratio for maximum thresholds: >0.95
reset ratio for minimum thresholds: <1.05
reset time: ≤50 ms
overshoot: ≤30 ms
Operating ranges
service temperature: -10 °C ÷ +60 °C
storage and transport temperature: -25 °C ÷ +80 °C
relative humidity: < 95% with no formation of condensate
vibration: IEC255-21-1; class 2; 0.075mm 10-60Hz; 1g 60-500Hz
Weight
total: 2.5 Kg

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MDE/C133 2561 001
MX3IPG2A
Protection Class
device: IP52
upon request when flush-mounted in a panel: IP66
terminal board with mounted cover: IP20
Insulation
To ground and between two independent circuits whatsoever:
2 kV, 50 Hz per minute
Impulse test: 5 kV 1.2/50 µs
Electromagnetic compatibility
89/336/CEE : EN50081-2 EN50082-2 Directive
For industrial environments
UNIPEDE NORM(SPEC)13 "Automation and control apparatus for
generating station and substation"
ENEL R_EMC_02 "Apparati di automazione e controllo per centrali e
stazioni elettriche".
conditions of electromagnetic compatibility:
IEC 1000-4-8 EN 61000-4-8 lev.5; 1000 A/m
IEC 1000-4-10 EN 61000-4-10 lev.5; 100 A/m
IEC 1000-4-3 ENV 50140 lev.3; 10 V/m
77B(Sec)1 ENV 50204 lev.3; 10 V/m
IEC1000-4-2 EN61000-4-2 lev.4;8kV contact;15kV air-break
77A/120/CD lev.4 / 3; 300V / 10-1-1-10 V
IEC 1000-4-5 EN 61000-4-5 lev.4; 4kV 1.2/50 µs
IEC 1000-4-12 EN 61000-4-12 lev.3; 2.5 kV
IEC 1000-4-4 EN 61000-4-4 lev.4; 4 kV
77B/144/DIS ENV 50141 lev.3; 10 V
77A(Sec)99 lev.2; 10%
IEC 1000-4-11 EN 61000-4-11 > 20 ms
IEC/CISPR11 EN55011 group 1 class A
Reference standards
CEI 95-1 EN 60255-6 IEC 255
Low voltage directive 73/23/CEE
2.GENERALCHARACTERISTICS
The device features a mechanical casing that is 4U in height,
and as wide as to allow up to 4 pieces to be accommodated
in a 19" rack, in addition to normal flush mounting.
The casing is made of a hot-galvanized PVC-coated plate
frame inside which the moving part that carries all the elec-
troniccircuits and thelocal interface slides on guides. The pull-
out action is facilitated by the presence of special "handles"
which, when the device is "plugged in", are also used to lock
the two parts. The aluminium frame of the moving part renders
the latter excellently rigid.
The device-system interface terminal blocks are located on
top of the casing and, for each electrical connection, a screw
clamp is available apt to receive up to 2 cable terminals, 4mm2
in size. Using a special accessory that is included in the
supply, the connection can also be made through Faston
members.
Special error-fighting codes do not allow relays other than
those compatible with the housing to be inserted.
Acoverlidclasses theterminalblockwithintheIP20protection
class.
When the moving part is pulled out, the current inputs are
automatically short-circuited, whereas the voltage and auxil-
iary circuits are disconnected.
The device front bears two labels:
one plate lists the factory configuration of the device, namely
auxiliary voltage, rated current and frequency;
The other plate, always in accordance with the factory configu-
ration, provides an explanation of LED's indications.
Both labels are easily replaced with new ones, which can bear
any information as required by the client.
As far as the factory configuration relevant to output relays,
LED's, digital inputs and relevant settings are concerned,
please refer to tables A, B and C.

pag. 8
MDE/C133 2561 001
MX3IPG2A
2.1 Selecting rated values
The selection of the rated current between 1 or 5 Ampères for
phase protection is made by acting on a jumper that is located
by one of the following points: S20, S21, S22, S23, which can
be reached once the relay has been pulled out (see fig. 1, 4a,
4b, 4c, 4d).
IWARNING
Dangerousvoltagesmayremaininthedeviceevenwhenthe
latter has been de-energized or pulled-out of its casing
(capacitor's memory)
fig. 1
3.OPERATION
3.1 Underresistance protection(rotor ground)
The underresistance protection works by comparing the ratio
between voltage and current injected into the attachment X2/
IPG2A with the set thresholds (R<,R<<): when the calculated
resistance falls below a given threshold,causes the tstart and
the trip timers t1 t2 to trip. If the value remains below the
threshold, once the associated tstart delay is over, the delayed
start command is sent.
If the tripping timers also reach the set overtime, the tripping
command is sent; the partial and total counters related to the
tripped threshold increase their counts and the event logging
session starts.
If a special digital input is enabled which has been set to lock
one or more thresholds, the starting registers are held at zero,
thus preventing operation as long as the input remains ena-
bled.
Threshold R< has a definite time characteristic in the form:
t = t1
3.2 Overcurrent protection (input I)
The device is equipped with an overcurrent threshold (injected
byattachmentX2/IPG2A)associatedtoatstartandatriptimer.
The overcurrent threshold trip may be locked by feeding a
special digital input purposely set to suit the purpose.
3.3Undervoltageprotection (diagnostics -inputU)
The device is equipped with an undervoltage threshold (ap-
plied to attachment X2/IPG2A) associated to a timer. The trip
of the undervoltage threshold can be locked by feeding a
special digital input purposely set to suit the purpose.
3.4Overvoltageprotection(
diagnostics-inputU
)
The device is equipped with an overvoltage threshold (injected
by the attachment X2/IPG2A) associated to a timer. The trip of
the undervoltage threshold can be locked by feeding a special
digital input purposely set to suit the purpose.
3.5 Direct undervoltage protection (input Ucc)
The device is equipped with a direct undervoltage threshold
associated to a tstart and a trip timer. The direct undervoltage
threshold trip can be locked by feeding a special digital input
purposely set to suit the purpose.
3.6 Direct overvoltage protection (input Ucc)
The device is equipped with a direct overvoltage threshold
associated to a tstart and a trip timer. The direct overvoltage
threshold trip can be locked by feeding a special digital input
purposely set to suit the purpose.
TOP
RELAY
FRONT

pag. 9
MDE/C133 2561 001
MX3IPG2A
3.7 Main and spare settings
The device can store two groups of settings, named 'main' and
'spare' settings, which can be programmed through the
keyboard, a Personal Computer or a network.
The current settings are indicated on the display unit with the
text'SETTINGSINUSE'.
The device, notwithstanding the selections made, can be
"forced" to use the SPARE settings. Such forcing can be
enabled from the network or through a continuous signal to be
sent to the digital input (IN DIG 1), previously set to implement
this function. This condition is signalled by the presence of the
characters <!> next to the selected settings; when the signal
drops, the previously selected group of settings is enabled
again, whereas the characters <!> disappear (see paragraph
6.1.3).
4.ADDITIONALFUNCTIONS
4.1Diagnostics
Diagnostic activities are envisaged which are automatically
carried out upon powering on the device as well as from time
to time during the running, and which provide the following
actions:
- signalling fault or failure conditions. This signal de-
energizes the diagnostic relay, turns off the green LED
(indicating running system) and lights up the red LED
(indicating system failure).
- system lock-out in the event of faults that might entail ill-
timed operation (VITAL FAULTS).
- failure code display.
The following failures are classed as NON-VITAL FAULTS:
- output relay(s) (X1 - X5) failure
- communication failure
- internal clock failure
The following failures are classed as VITAL FAULTS:
- feeder failure
- EEPROM failure
- internal or external RAM failure
- Analogue/Digital converter failure
In the presence of vital faults, the device will automatically
displays the fault code; this condition can only be reset, if the
equipment allows this condition to be reset, by enabling the
"settings change' command.
In the event of , upon starting up the equipment, an EEPROM
failure making it impossible to retrieve the information on the
selected dialogue language, the device will continue working
using Italian as the default dialogue language.
The device includes the 'Watch Dog' function.
The diagnostic activity is also aimed at signalling any condition
of "inhibited equipment"; this condition is displayed with a
dedicated code, the diagnostic relay is de-energized and the
red LED (faulty device) lights up. This condition can only be
reset by enabling the 'change settings' command.
Thediagnosticmenualsoindicatesthedatewhenlastchanges
were made to the equipment.
4.2 Output circuits
The output circuits are composed of six relays, each of them
equipped with two contacts (see block diagram).
The X6 relay, normally energized, is strictly assigned to the
diagnostic function.
Each of the five relays left, if duly programmed from the
keyboard, a Personal Computer or a network, can be:
- set to perform one or more functions
- preset for:
- monostable operation: immediate return to the quiescent
position when the cause that operated it is removed.
- bistable operation (MEMOR): the tripping position is main-
tained until a reset signal comes from the front push-button,
the digital input or the serial connection.
- a minimum duration of the signal or command (t_IMP).
The output relays, except for the diagnostic relay, can all be
simultaneouslysetto"normallyenergized"(NORMAL.ON=ON)
or"normallyde-energized"(NORMAL.ON=OFF):thisselection
is made by acting on the settings change function.

pag. 10
MDE/C133 2561 001
MX3IPG2A
4.3LEDsignallingcircuits
The signalling circuits are made of twelve LED's (see fig. 5).
Four LED's are rigorously assigned to previously established
signalling functions:
- (Uaux) green LED ON in the presence of input voltage and
with correct feeder output voltage values
- (RUN) green LED ON with fixed light in normal conditions
and blinking during setting changing and testing functions
- (RUN) red LED ON with fixed light when the diagnostic
detects a fault or a condition of inhibition.
- (Rx Tx) green LED ON with fixed light when the device is
correctly connected, blinking with the communication
board not enabled or not properly set; OFF when the
communication board is not present on the device.
Each of the eight LED's left, if duly programmed from the
keyboard, a Personal Computer or the network, can be:
- set to perform one or more functions
- preset for:
- monostable operation; it immediately goes off when the
cause that made it go on is removed
- bistable (MEMOR) operation; the LED remains ON until a
reset signal is sent from the front push-button, the digital
inputortheserial connection.Anyfailureofauxiliaryvoltage
only entails a momentary loss of the luminous signals,
which come back again as soon as voltage is restored.
A pocket is provided close to the LED's, where LED describing
labels can be placed.
4.4DigitalInputs
Each of the three optoisolated inputs can be associated with
one or more protection functions by duly programming them
through keyboard, Personal Computer or via network. The
input voltage may happen not to match the auxiliary voltage of
the device.
The digital inputs can be programmed to be enabled by normal
energizing or normal de-energizing.
4.5Additional timers
Allthe optoisolated inputs(IN DIG1,IN DIG2,IN DIG 3) canbe
programmed to be associated with additional timers (t_X1,
t_X2,t_X3).
When the programmed input is energized, the associated
additionaltimeris started, andif the timerreaches the overtime
status, the tripping signal is sent and maintained until the input
is reset.
4.6 Counters
Each tripping threshold is associated with a partial and total
counter.
The counters work within the 0-9999 range; if number 9999 is
exceeded, the counter is automatically reset and the count
restarts from the beginning.
All of the partial counters can be reset by acting through the
keyboard, a Personal Computer or via network.
4.7Eventlogging
When a tripping event occurs, the following information is
stored in the circulating memory:
- first operated threshold
- day, month, year, time, minute, second and millisecond
identifying the tripping moment.
- values measured when the tripping occurred.
The information concerning one trip is called event.
The circulating memory allows the last 8 events to be stored,
and when this number is exceeded, a new record replaces the
older: the last event is stored as EVENT 1.
Thestoredeventscanbereadfromthefrontdisplayunitorfrom
a PC serially connected to the device.
The device can also record the latest 32 changes of state (with
related date and time) and make them available exclusively
through PC or via network.
4.8 Measurements
The device is in a position to display the effective present
values of resistance, expressed in Ohm, direct voltage, ex-
pressed in Un, injected alternating voltage stated in V and
injected alternating current stated in A .
The unit also displays the maximum value of injected alternat-
ing current stated in A ever measured by the latest 'Reset
maximum values'
4.9 Test
Besides the normal diagnostic already dealt with, the device
also offers, in the TEST mode, the possibility of testing the
LED's, the display unit and the output relays.
- The LED test turns on all the LED's, from L1 to L8, and the
display unit (LCD) for two seconds.
Once the test is over, the LED's that were supposed to be
ONbeforethetestremainONandthedisplayunitgoesback
to the previous information displayed. The test can also be
performed in any operating condition, without affecting the
operation in progress.
- the relay test allows the output relays X1 to X5 to be
sequentially selected and checked for correct operation. In
this way, any external signalling or control circuit can be
tested, too.
The tested relay remains energized for 150 to 200 ms.
If starting or tripping commands are already present, the
test is not carried out and a dedicated message appears on
the display unit.
The test on auxiliary relays does not affect counters, event
logs and LED's.
4.10 Alphanumeric user identifier
The device can be identified in the plant by an alphanumeric
code, which can be set by the user directly on the equipment
or from a PC. With a network-linked device, the alphanumeric
code can only be modified by operating through the network.

pag. 11
MDE/C133 2561 001
MX3IPG2A
4.11 Language
The device can display information in four languages: Italian,
English, French and Spanish. The language can be selected
through the keyboard.
4.12 LCD settings
The display can be set for fixed (OFF) or timed (ON) back-
lighting; in the last case, the display lights up for 300s any time
a key is pressed .
4.13Inhibiting operation-Deconfigurationvia network
Inhibiting the device is required in operating plants, to avoid
inefficiency on feeding a protection whose settings are un-
known or need to be changed.
The inhibition is performed by holding the settings change
button pressed for about 2 s,while injecting the auxiliary
voltage until the following message is displayed:
[ BLOC ]
[ ]
On releasing the push-button, the condition of inhibited device
is signalled by a diagnostic message of P fault.
The normal operating conditions can only be restored by
moving to the settings change function, which is enabled at all
events; a temporary loss of the auxiliary voltage supply does
not affect the inhibited state of the device.
If the device is also equipped with a field-bus board, by holding
the settings change push-button further pressed for about 2s,
in the BLOC state, the device will display:
[ NET RESET ? ]
[_ NO YES _]
if a confirmation is provided, the device can also be made lose
its network configuration.
The full procedure for inhibiting and de-configuring the device
via network must be enacted any time you need to replace the
unit.
By resetting an inhibited and deconfigured unit, a K fault
message is displayed and remains displayed until the unit is
configured anew.
Operation can only be reset by moving to the settings change
function, which is enabled in any case. fig. 2
RELAY
FRONT
TOPSIDE
BOARD
NOT
ENABLE
BOARD
ENABLE
A-AVIEW A-AVIEW
A-A VIEW
ICAUTION
Hazardous voltages can remain in the device evenwhen
the latter has been de-energized or pulled out of its casing
(condenser memory).
4.14 Serial communication on LONWORKS(TM)bus
The device, in the version including the special bus board, can
communicate with a central monitoring and control system at
a speed equalling 1.2 5 Mbaud. The connection to the field bus
is made through terminals: 43 and 45.
The communication board, which can be also added later, is
only enabled if the special S6 jumper is correctly connected,
while it is not in the case the jump is connected in vertical
position across S5 and S6 (see fig. 2).
If the S6 jumper is connected when the communication board
is not present, the diagnostic function displays a message of
failure, behaving as if the board was present and faulty.
Appendix A lists the parameters available for the network.

pag. 12
MDE/C133 2561 001
MX3IPG2A
4.15 RS485 serial communication and MODBUS protocol
Concerning the communication of devices provided with
softwareversion 2.00 and subsequent, three different versions
are possible:
- whitout any communication card (version
MX3IPG2A.11e .12);
- provided with LonWorks(TM) communication card (version
MX3IPG2A.61e .62);
- provided with Modbus communication card (version
MX3IPG2A.71e .72);
The identification of the installed communication card is
automatic.
Whenusinganunit provided withLonWorks(TM) communication
card, it's required first to effect the relay wiring according to its
wiring diagram and later proceed with the configuration of all
connected devices; the automatic configuration of connected
devicesispossiblebyconnectingaPCprovidedwithPCLTA10
or SLTA10 card, in which CORMOX2 software has been
installed.
When using a device provided with Modbus communication
the configuration of each relay may be realized by the front
interface,orbytheIRMA2programinstalledonaPCconnected
to the relay via front plug. The configuration may be realized
alsoonrelaysnotjetconnectedtogetherandmaybeeventually
organized in files together with all other settings.
Modbus communication card configuration requires:
PARAMETER VALUE
Speed 300 Baud
600 Baud
1200 Baud
2400 Baud
4800 Baud
9600 Baud
19200 Baud
38400 Baud
Parity NONE
EVEN
ODD
DataBit 7
8
StopBit 1
2
Address 1 - 255 (0 broadcast)
This parameters can be programmed in local or remote mode.
So, the following extension of the 'RELAY DATA' menu is
available:
[MX3IPG2A ] relaytype
[Sw Vers 2.00/01] software version
ñ ò
[PLANT IDENTIFIER]
[GenPan ] ðplant identifier
ñ ò
[SPEED 38400 Bb] ðspeed setting
[PARITY NONE ] ðparity setting
ñ ò
[DATA BIT 8 ] ðdata bit setting
[STOP BIT 1 ] ðstop bit setting
ñ ò
[ADDRESS 111 ] ðaddress setting
[ ]
OndemandisavailabledocumentationaboutLonWorks(TM) andModbus
versions.
4.16 Fault recorder
Thedevicecanrecordthecourseofinputcurrents(Ia,Ib,Ic,Io)
and the logic states of the 8 LED's, the 5 auxiliary relays, the
3 digital inputs and the 3 additional timers. The total recording
time equals 2.5s, and can be divided into variable time before
start-up and variable time after start-up. The fault recorder
function can be started for: tstart, tripping, enabling of digital
inputs and timers. The selection of the starting parameters,
the graphic display and reset of fault recorder can be made
through a PC or a network. The function can even be reset by
interrupting the auxiliary voltage for a short while.
4.17Checkingtripping circuits for continuity
The use of a digital input enabled by normal de-energizing
combined with one of the TX timers allows the tripping coil
circuit to be monitored for continuity, whether the breaker is
closed or open.

pag. 13
MDE/C133 2561 001
MX3IPG2A
5.LOCALINTERFACE Key Itscrollsthemenutotheleft orselects
thedigit to bechanged, ifthe settings
change function is enabled. [ï]
Key It resets the stored LED signals if the
cause has been removed, or the par-
tial counters, if you are in the "display
counters" menu.
It takes the end relays to quiescent
state when they are set to bistable
operation.
Key If pressed for at least 2s, this key
enables the settings to be changed.
When the settings change is ena-
bled, the green LED (RUN) lights up
blinking. If pressed once again for at
least 2s, the system goes back to the
normal running conditions and, pro-
videdthat aconfirmation isgiven, the
new settings become the current
ones (the key can only be reached by
removing the cover). During the set-
ting change operations, the device
continues working with the old set-
tings. If the changes made are con-
firmed in the presence of a fault, they
are not made the current ones until
the event is over: the interrupt state is
signalled for 3s by a message on the
display unit, after which you are
prompted to confirm the changes
made.
If pressed upon feeding the device
with auxiliary voltage until a failure
message appears on the display,
this key inhibits the device from oper-
ating.
Keys If simultaneously
pressed for at least 2s, these keys
enable the protection to be tested.
When the testing activity is enabled,
the green LED (RUN) lights up blink-
ing.
If simultaneously pressed for at least
2s during the TEST routine, these
keys enable you to leave the protec-
tion testing mode.
The local interface is made up of:
- An LCD display unit organized on two lines of sixteen
characters each.
Through a special keyboard-controlled scanning, the dis-
play unit enables the settings to be read and changed, the
measurements, the counters, the logged events and the
diagnostic information to be read.
- Akeyboard orkeypad made up of sixkeys, fiveof which can
even be reached when the cover is fitted through a special
link.
In addition to the above-mentioned scanning, the keyboard
is also used to change the settings, to carry out tests that
require commands to be sent and stored indications to be
set to zero. The keys that can be reached when the cover is
fitted only allow for read-out and reset operations.
Key It scrolls the menu upwards or in-
creases a value, if the settings
change function is enabled. [ñ]
Key It scrolls the menu downwards or
decreases a value, if the settings
change function is enabled. [ò]
Key It scrolls the menu to the right or se-
lects the digit to be changed, if the
settings change function is enabled
[ð].

pag. 14
MDE/C133 2561 001
MX3IPG2A
- Twelve LED's, four of which are rigorously dedicated to
general running functions.
- A four-pin connector in compliance with FCC 68.
By means of a special optoelectrical adapter, an optical
fibre cable and a RS232 optical converter, it allows the
device to be locally linked with a personal computer.
The P.C., through a special interface programme, makes
it possible to read and change the settings, to read the
measurements, the counters, the logged events, the diag-
nostic information and the fault recorder.
6.LCDMENUSTRUCTURE
6.1MAINREADINGMENU
The device has a main menu, leading to several sub-menus
(tree structure). All the displays can be made permanent .
[R Ω] Present resistance value
[U- Un ] Present direct voltage value
ñ ò
[MENU: ENGLISH] Dialogue language
[ ] ðchange dialogue language
ñ ò
[DATE ] present date and time
[TIME ] ðchange date and time
ñ ò
[SETTINGS: ] view settings in use
[ MAIN]
ñ ò
[SETTINGS READING] ðview main settings
[MAIN ]
ñ ò
[SETTINGS READING] ðview spare settings
[SPARE ]
ñ ò
[ MEASUREMENTS ] ðView/reset present and stored
[ ] measurements
ñ ò
[ COUNTERS ] ðview counters and
[ P=RESETTABLE ] reset partial counters
ñ ò
[ EVENTS ] ðview
[EVENTO 1=ULTIMO] stored events
ñ ò
[ OUTPUT RELAYS ] ðview output relay
[ ] settings
ñ ò
[ DIGITAL ] ðview digital input
[ INPUTS ] settings
ñ ò
[ LED ] ðview LED settings
[ ]
ñ ò
[ RELAY DATA ] ðview model - soft. release
[ ] and plant identifier
ñ ò
[ DIAGNOSTIC ] ðview faults
[ ] date of last change
6.1.1Change dialoguelanguage
The default language is ITALIAN.
Here follows an example showing how to change the dialogue
language. Suppose we wish to set ENGLISH as the desired
language.
a) Press the key òor ñuntil the following message appears
on the display: [MENU: ITALIAN ]
[ ]
b) By pressing the key ðthe language change function is
enabled, and the following message appears on the display:
[MENU: ITALIAN ]
[ ]

pag. 15
MDE/C133 2561 001
MX3IPG2A
By pressing òorñyou scroll the stored languages menu. For
the purpose of our example, we must stop when the following
message is displayed:
[MENU: ENGLISH ]
[ ]
d) By pressing ïyou confirm the selected dialogue language
and go back to the main menu. The following message appears
on the display: [MENU: ENGLISH ]
[ ]
6.1.2 Change date and time
Access to "change date/time" is denied when the protection is
network-connected. If the network connection is made after
entering the change function, the local changes are not ena-
bled.
Let us assume we wish to change the starting date 10/06/93
into 24/05/95.
a) Press the key òor ñuntil the display shows:
[DATE 10/06/93]
[TIME 9:38:43]
b) By pressing the key ðthe change function is enabled and
the following message appears on the display:
[DATE 10/06/93]
[TIME 9:38:43]
c) By pressingðselect the value to be changed.To select the
lastdigit thatmakesupthedate,pressðsix times, thedisplays
will show: [DATE 10/06/93]
[TIME 9:38:43]
d) By pressing ñ, increase the selected value. Hold the key
pressed until the display shows:
[DATE 10/06/95]
[TIME 9:38:43]
e)By pressing ï,selectthefourthdigitthatmakesupthedate,
the display will show:
[DATE 10/06/95]
[TIME 9:38:43]
f) By pressing ò, decrease the selected value until the display
shows: [DATE 10/05/95]
[TIME 9:38:43]
g) By pressing ïtwice further, select the second digit that
makes up the date, and the display will show:
[DATE 10/06/95]
[TIME 9:38:43]
h) By pressing ñ, change the selected value (upon reaching
number 9, the tens will go up by one unit) until the display
shows: [DATE 24/05/95]
[TIME 9:38:43]
i) Press ïuntil you move to the beginning of the line. The
display will show: [DATE 24/05/95]
[TIME 9:38:43]
j) By pressing òthe "change time" function is enabled. The
steps are the same as those described in c) to i).
The device does not accept time or date settings that do not
exist.
Thetime counting startsupon movingfrom thedigits that make
up the time to the wording TIME at the beginning of the line.
k) By pressing ïthe changes made are confirmed and the
system moves back to the main menu. The display will show:
[DATE 24/05/95]
[TIME 9:38:43]
6.1.3 Display settings in use
a) Press òor ñuntil the display shows, for instance:
[SETTINGS IN USE:]
[ MAIN]
The second line will display the group of settings the device
currently uses.
Any <!> possibly displayed, notwithstanding the contents of the
second line, indicates the device is working with the SPARE
settings.
[SETTINGS IN USE:]
[ <!> MAIN]
The device will continue working with the SPARE settings as
long as the "change settings" command sent by the IN DIG1
digital input remains enabled. When the <!> characters disap-
pear, the device restarts working with the group of settings
displayed.
6.1.4 Display main settings
a) Press òor ñuntil the display shows:
[SETTINGS READING]
[ MAIN ]
b) By pressing ð, the main settings display sub-menu is
entered,by pressing òorñthefollowingsub-menu isscrolled:
rated frequency fn
direct rated voltage setting range (**) S..
direct rated voltage Un
first underresistance threshold R<
starting signalling delay R< tstart
trip delay R< t1
second underresistance threshold R<<
starting signalling delay R<< tstart
trip delay R<< t2
alternating overcurrent threshold I~>
starting signalling delay I~> tstart
trip delay I~>t3
first direct undervoltage threshold U-<
U-< starting signalling delay tstart
trip delay U-< t4
second direct undervoltage threshold U-<<
U-<< starting signalling delay tstart
trip delay U-<< t5
first direct overvoltage threshold U->
U-> starting signalling delay tstart
trip delay U-> t6

pag. 16
MDE/C133 2561 001
MX3IPG2A
second direct overvoltage threshold U->>
U->> starting signalling delay tstart
trip delay U->> t7
additional timer t_X1
additional timer t_X2
additional timer t_X3
min. pulse width of end relays t_IMP
(**) the settings range relies on jumper S20, S21, S22 or S23
which are closed as follows:
jumper closed setting range
S20 30.00-300.00V
S21 3.00 - 30.00 V
S22 0.30 - 3.00 V
S23 0.03 - 0.30 V
c) By pressing ï,anywhere in the sub-menu, you will go back
to the main viewing menu:
[SETTINGS READING]
[MAIN ]
6.1.5 Viewing spare settings
a) Press òor ñuntil the display unit shows:
[SETTINGS READING]
[SPARE ]
b)Pressthekey ðtoenterthesparesetting viewingmenu,then
press òor ñto scroll across the whole submenu that lists:
first underresistance threshold R<
starting signalling delay R< tstart
trip delay R< t1
second underresistance threshold R<<
starting signalling delay R<< tstart
trip delay R<< t2
alternating overcurrent threshold I~>
starting signalling delay I~> tstart
trip delay I~>t3
first direct undervoltage threshold U-<
starting signalling delay U-< tstart
trip delay U-< t4
second direct undervoltage threshold U-<<
starting signalling delay U-<< tstart
trip delay U-<< t5
first direct overvoltage threshold U->
starting signalling delay U-> tstart
trip delay U-> t6
second direct overvoltage threshold U->>
starting signalling delay U->> tstart
trip delay U->> t7
Those parameters that are not present in the SPARE menu
take the same values as the MAIN settings.
c)Bypressingthekey ïanywhereinthesub-menu,yougoback
to the main reading menu:
[SETTINGS READING]
[ SPARE ]
6.1.6 Display current and stored measured values
a) Press the key òor ñuntil the display shows:
[ MEASUREMENTS ]
[ ]
b) By pressing the key ðyou will enter the measurement
displaymenu,andbypressingthekeyòorñthefollowingsub-
menu will be scrolled across:
present resistance value in Ohm R(*)
present direct voltage in Un U-
present injected alternating voltage value in Volt U~
present injected alternating current in Ampere I~
injected overcurrent value in Ampere I~MAX
c) By pressing RESET you may cancel the maximum stored
values being displayed.
By pressing the key ïanywhere in the submenu, you will go
back to the main reading menu:
[ MEASUREMENTS ]
[ ]
(*) When resistance cannot be measured, the symbol ---- will
be displayed; when resistance exceeds 6500 Ohm, the sym-
bol >6500 Ω will be displayed.
6.1.7 Viewing counters
a) Press the key òor ñuntil the display shows:
[ COUNTERS ]
[P =RESETTABLE ]
b) By pressing the keyðyouwill enter the counter display sub-
menu, and by pressing the key òor ñthe following sub-menu
will be vertically scrolled across:
total trips of first underresistance threshold R< T
partial trips of first underresistance threshold R< P
total trips of second underresistance threshold R<< T
partial trips of sec. underresistance threshold R<< P
total trips of alternating overcurrent threshold I~>T
partial trips of alternating overcurrent threshold I~>P
total trips of first direct undervoltage threshold U-< T
partial trips of first direct undervoltage threshold U-< P
total trips of sec. direct undervoltage threshold U-<< T
partial trips of sec. direct undervoltage threshold U-<< P
total trips of first direct overvoltage threshold U-> T
part. trips of first direct overvoltage threshold U-> P
total trips of sec. direct overvoltage threshold U->> T
partial trips of sec. direct overvoltage threshold U->>P
c) By pressing the RESET button, the partial counter being
displayed can be reset.
d)Bypressingthekeyï,yougobacktothemaindisplaymenu:
[ COUNTERS ]
[ P =RESETTABLE ]
6.1.8 Viewing events
a) Press òor ñuntil the display shows:
[ EVENTS ]
[EVENT 1=LAST]
b) By pressing ðyou enter the sub-menu where the eight
events to be stored can be selected. The display shows:
[EVEN.1 DD/MM/YY ]
[ hh:mm:ss.xxx ]

pag. 17
MDE/C133 2561 001
MX3IPG2A
the first line displays the event number, the day, the month and
the year, whereas the second line lists the time, the minutes,
the seconds and thousandths of a second concerning the
event.
c) By pressing the keyòorñ, select the event to be displayed.
Once the selection is made, pressð; thus, you enter the event
display sub-menu, and by pressing òor ñthe following sub-
menu is scrolled:
tripped threshold TRIP
value of resistance in Ωwhen the trip occurred R_G
value of alternating current in A when the trip occurred I~G
direct voltage value in mult.of Un when the trip occurredU-_G
d) By pressing ïanywhere in the sub-menu, you go back to
eventdisplaysub-menu;todisplayothereventsgothroughstep
c)again.Bypressingï anywhereinthesub-menuyougoback
to the main reading menu:
[ EVENTS ]
[EVENT 1=LAST]
6.1.9Displayoutputrelays
a) Press òor ñuntil the display shows:
[OUTPUT RELAYS]
[ ]
b) By pressing ðyou enter the sub-menu that displays the
allocation of the auxiliary output relays. The display shows:
[REL X12345]
[ON ↑↑↑↑↑]
which stands for the enabling by normal energizing (↑) or de-
energizing (↓) of each relay.
Press òto scroll across the whole submenu, the display unit
will show: [R< START]
[REL X..3.5]
the first line displays the function that is associated with the
relay or relays listed in the second line.
By pressing the keys òor ñthe sub-menu is scrolled across.
Thefunctions that can be associated with the outputrelays are:
delayed start of first underresistance threshold R<START
first underresistance threshold trip R< TRIP
delayed start of sec. underresistance threshold R<<START
second underresistance threshold trip R<< TRIP
delayed start of injected overcurrent threshold I~>START
alternating overcurrent threshold trip I~>TRIP
undervoltage (diagnostics) threshold trip U~< TRIP
overvoltage (diagnostics) threshold trip U~> TRIP
delayed start of first direct undervoltage thresholdU-<START
first direct undervoltage threshold trip U-< TRIP
delayed start of sec. direct undervoltage thresholdU-<< START
sec. direct undervoltage threshold trip U-<< TRIP
delayed start of first direct overvoltage threshold U->START
first direct overvoltage threshold trip U-> TRIP
delayed start of sec. direct overvoltage thresholdU->>START
direct overvoltage threshold trip U->> TRIP
timer tX1 overtime t_X1TRIP
timer tX2 overtime t_X2TRIP
timer tX3 overtime t_X3TRIP
first digital input fed IN DIG 1
second digital input fed IN DIG 2
third digital input fed IN DIG 3
It is furthermore possible to display the output relays that bear
the following settings:
minimum pulse width t_IMP
bistable operation MEMOR
c) By pressing the key ïanywhere in the sub-menu, you go
back to the main reading menu:
[OUTPUT RELAYS]
[ ]
6.1.10Viewingdigitalinputs
a) Press the key òor ñuntil the display shows:
[ DIGITAL ]
[ INPUTS ]
b) By pressing the key ðyou enter the sub-menu that lists the
allocation of digital inputs. The following message appears on
the display: [IN DIG 123]
[ON ↑↑↑]
which stands for the enabling by normal energizing (↑) or de-
energizing (↓) of each input.
Press òto scroll across the whole sub-menu, the display unit
will show: [BLOC. R< ]
[IN DIG ...]
the first line contains the function that is associated with the
digital inputs listed in the second line.
By pressing the keys òor ñthe sub-menu is scrolled.
The functions that may be associated with the inputs are:
first underresistance threshold trip lockBLOC. R<
second underresistance threshold trip lock BLOC. R<<
overcurrent threshold trip lock BLOC. I~>
undervoltage threshold trip lock BLOC. u~<
overvoltage threshold trip lock BLOC. u~>
first direct undervoltage threshold trip lock BLOC. U-<
second direct undervoltage threshold trip lock BLOC. U-<<
first direct overvoltage threshold trip lock BLOC. U->
second direct overvoltage threshold trip lock BLOC. U->>
timer tX1 start t_X1
timer tX2 start t_X2
timer tX3 start t_X3
Switching to spare settings SETTINGSSWITCH
LED's and output relays reset RESET
c) By pressing the key ïanywhere in the sub-menu, you go
back to the main reading menu:
[ DIGITAL ]
[ INPUTS ]
6.1.11DisplayLED's
a) Press the key òor ñuntil the following message appears
on the display: [ LED ]
[ ]

pag. 18
MDE/C133 2561 001
MX3IPG2A
b) By pressing the keyðyou enter the sub-menu that displays
the LED allocation. The following messages will be displayed:
[I> START]
[LED L..3..6.8]
the first line displays the function that is associated with the
LED's listed in the second line.
Bypressingthekeysòorñ,thesub-menuisverticallyscrolled.
The functions that can be associated with the LED's are:
delayed start of first underresistance threshold R<START
first underresistance threshold trip R< TRIP
delayed start of sec. underresistance threshold R<<START
second underresistance threshold trip R<< TRIP
delayed start of injected overcurrent threshold I~>START
alternating overcurrent threshold trip I~>TRIP
undervoltage (diagnostics) threshold trip U~< TRIP
overvoltage (diagnostics) threshold trip U~> TRIP
delayed start of first direct undervoltage thresholdU-<START
first direct undervoltage threshold trip U-< TRIP
delayed start of sec. direct undervoltage thresholdU-<< START
sec. direct undervoltage threshold trip U-<< TRIP
delayed start of first direct overvoltage threshold U->START
first direct overvoltage threshold trip U-> TRIP
delayed start of sec. direct overvoltage thresholdU->>START
direct overvoltage threshold trip U->> TRIP
timer tX1 overtime t_X1TRIP
timer tX2 overtime t_X2TRIP
timer tX3 overtime t_X3TRIP
first digital input fed IN DIG 1
second digital input fed IN DIG 2
third digital input fed IN DIG 3
It is furthermore possible to display the LED's that bear the
following settings:
bistable operation MEMOR
c) By pressing the key ïanywhere in the sub-menu, you go
back to the main reading menu:
[ LED ]
[ ]
6.1.12 Viewing relay data
a) Press òor ñuntil the display shows:
[ RELAY DATA ]
[ ]
b) By pressing the key ðyou enter a sub-menu where the
protection model and the software release are displayed:
[MX3IPG2A ]
[Soft Rel. 1.00]
c)Bypressingthekeyòonceagain,thesecondlinewilldisplay
the alphanumeric identification code that the user gave to the
device, for instance:
[PLANT IDENTIFIER]
[CELL No. 17bis ]
d) By pressing the key ï anywhere in the sub-menu, you go
back to the main reading menu:
[ RELAY DATA ]
[ ]
6.1.13Diagnosticdisplay
1)Faultlocation
a) Press the key òor ñuntil the following message is
displayed: [ DIAGNOSTIC ]
[ ]
In the presence of VITAL FAULTS, the device automatically
displays the window, without needing to enter the diagnostic
menu.
b) By pressing the key ðyou enter a sub-menu that displays
the operating state of the relay. The display will show:
[LAST SETTING ]
[DD/MM/YY hh:mm]
the second line displays the day, the month, the year, the time
and the minutes of the time when last change was made to the
settings.
c) By pressing the key òonce again, if the device has not
detected any failure, the following message will be displayed:
[ RUNNING ]
[ ]
IfNON-VITALFAULTSaredetected,thefollowingmessagewill
be displayed: [FAULT ]
[ABCDE.....KL ]
whereas, if VITAL FAULTS are detected, the <!> characters will
be displayed, too: [FAULT <!>]
[.....FGHIJ... ]
The second line displays one or more fault identification
codes.
The following table provides the fault codes and the corre-
sponding fault description:
Code fault description
A X1 relay coil interrupted or related driver
B X2 relay coil interrupted or related driver
C X3 relay coil interrupted or related driver
D X4 relay coil interrupted or related driver
E X5 relay coil interrupted or related driver
F internal feeder failure
G EEPROM failure
H Internal RAM failure
I External RAM failure
J Analogue to Digital converter
K communication board failure or enabled but
not configured
L internal clock failure
If jumper S6 (see fig.2) that enables the communication board
is connected when the board is not present, the K code shows
up, as if a failure were detected in the board.
d)AsfarastheNON-VITALFAULTSareconcerned,bypressing
the keyï anywhere in the sub-menu you go back to the main
display menu: [ DIAGNOSTIC ]
[ ]

pag. 19
MDE/C133 2561 001
MX3IPG2A
whereas,asregardstheVITALFAULTS,youcanonlyleavethe
diagnostic sub-menu, if the device allows you to do that, by
entering the “settings change” menu.
2)Inhibiteddevice
The condition of “inhibited device” is displayed as follows:
[FAULT <!>]
[..............P ]
This condition can only be reset by entering the "settings
change“ menu (it is however necessary to confirm when you
are prompted to SAVE CHANGES, although no setting has
been changed).
Warning: even simply view the set parameters from the
“settings change” menu, since upon leaving this condition, the
device will not be inhibited any longer.
If, beside inhibiting the device, you have also deconfigured it,
the return to operation causes a fault K message to be
displayed until the unit is configured anew (see paragraph
4.14).
6.2MAINSETTINGCHANGEMENU
Bypressing the key anywhereinthedisplaymenus
for at least 2s, the main settings change menu is entered.
Thence, several sub-menus can be entered (tree- structure).
When the settings change function is enabled, the green LED
(RUN) lights up blinking.
If the settings change menu is already acceded through a PC
or a network, any local change is inhibited, and the following
message will be displayed:
[SETTINGS CHANGE]
[NOT AVAILABLE ]
The access priority to the changing function among PC, net-
work and keyboard is time-dependent.
During the settings change operations, the device continues
working with the old settings.
All the displays can be made permanent.
[SETTINGS IN USE:] settings in use
[ MAIN] ðselect of current setting group
ñ ò
[SETTINGS CHANGE] ðchange main settings
[MAIN ]
ñ ò
[SETTINGS CHANGE] ðchange spare settings
[SPARE ]
ñ ò
[ OUTPUT RELAYS ] ðoutput relays
[ ] settings
ñ ò
[DIGITAL INPUTS ] ðdigital inputs
[ ] settings
ñ ò
[ LED ] ðLED's settings
[ ]
ñ ò
[ RELAY DATA ] ðsetting of
[ ] alphanumeric code
ñ ò
[ LCD ] ðpermanent display back-lighting
[AUTOMATIC RETURN] (LCD) enabled
By pressing the key anywhere in the changing
menus for at least 2 seconds, you go back to the main display
menu, but you are first prompted to confirm or discard the
changes made: [NEW SET.CONFIRM?]
[< NO YES >]
By pressing ïall the changes made are discarded, whereas
by pressing ðthe changes made are confirmed.
The green LED (RUN) stops blinking and becomes perma-
nent.
If upon confirming the changes, a fault is detected, the settings
are not accepted as long as the fault event persists. This state
is signalled for 3s by the following message:
[SETTINGS CHANGE]
[DELAYED ]
once the event is over, you are prompted to confirm the
changes made again.
If the transfer is interrupted is due to a digital input being
enabled which cannot be disabled at the moment and you
need to change the settings, the device must be inhibited; after
that, you can start changing the settings (see paragraphs 4.14
and 6.1.13).
Note:the “change settings” function can even be implemented
when the device is “forced” to use the SPARE SETTINGS. In
such a case, the system only interrupts the selection of
SETTINGS IN USE: MAIN until the external forcing signal
disappears. Ifa setting is changed when the systemis “forced”
from the outside, the following message is displayed:
[SPARE SETTINGS]
[FROM EXT.CONTROL]
All the following examples take their start from the main
settings change menu.
6.2.1 Select current settings group
a) Press the key òor ñuntil the following message is dis-
played:
[SETTINGS IN USE:]
[ MAIN]
b) After pressing the keyð, the current settings can start being
changed. The following message is displayed:
[SETTINGS IN USE:]
[ MAIN]
c) By pressing òor ñ, the following message is displayed:
[SETTINGS IN USE:]
[ SPARE]

pag. 20
MDE/C133 2561 001
MX3IPG2A
d) By pressing the key ïthe new selection is confirmed, and
the system goes back to the main settings change menu. The
following message is displayed:
[SETTINGS IN USE:]
[ SPARE]
6.2.2 Change main settings
a) Press the key òor ñuntil the following message is
displayed: [SETTINGS CHANGE]
[MAIN ]
b) By pressing the key ð, you enter the main settings change
sub-menu, which contains all the parameters already listed in
§ 6.1.3.
c)Bypressingthe keysòorñ,youcanverticallyscrollthesub-
menu, and by pressing the key ðyou can start changing the
displayed parameter. The change can be made by pressing
the keys òor ñ.
d) By repeatedly pressing the key ïanywhere in the sub-
menu, you go back to the main changing menu:
[SETTINGS CHANGE]
[MAIN ]
Example of setting
Let us suppose we need to enable and set the rotor ground
threshold R< to 1015 Ohm starting from an initial setting of
990, OFF.
Go through steps a) and b)
Press òor ñuntil the threshold to be changed is selected on
display: [R< OFF]
[R< 0990 Ω ]
Press ðto start changing the selected setting I>>>,the display
unit will show: [R< OFF]
[R< 0990 Ω ]
Press òor ñto set it ON and the display will show:
[R< ON ]
[R< 0990 Ω ]
Press ï to move back to the beginning of the line. Thus, by
pressing ò, you may move to the second line.
Press ðto select the digit to be changed.
In our case, by pressing 4 times the key ð, the display unit will
show: [R< ON ]
[R< 0990 Ω ]
Press ñto increase the selected numberuntil the value re-
quired by our example is reached:
[R< ON ]
[R< 0995 Ω ]
Now, by pressing ïyou select the third digit making up the
setting, the display unit will show:
[R< ON ]
[R< 0995 Ω ]
By pressing ñthe digit is changed (on reaching number 9 the
units will increase by 1) until the display unit shows:
[R< ON ]
[R< 1015 Ω ]
Pressïto move back to the beginning of the line and go back
to the main editing menu:
[SETTINGS CHANGE]
[MAIN ]
Warning:
In the event of the direct rated voltage setting range being
changed, please remember to move the internal jumper
(S20....S23) as follows:
jumper closed setting range
S20 30.00-300.00V
S21 3.00 - 30.00 V
S22 0.30 - 3.00 V
S23 0.03 - 0.30 V
The movement of the jumper causes the setting to be changed,
as the latter is multiplied times 10dwhere d is the distance
between the old and the new jumper, for instance:
old setting
jumper S20
setting range 30-300 V
set Un 165 V
new setting
jumper S23
setting range 0.03-0.30 V
set Un 165 x 10(20-23)= 0.16 V
6.2.3 Change spare settings
a) Press the key òor ñuntil the following message is
displayed: [SETTINGS CHANGE]
[SPARE ]
b) By pressing the keyð, you enter the spare settings change
sub-menu, which contains all the parameters already listed in
§ 6.1.5.
c)Bypressingthe keysòorñ,youcanverticallyscrollthesub-
menu, and by pressing the key ðyou can start changing the
displayed parameter. The change can be made by pressing
the keys òor ñ.
The settings change procedure mirrors that described in the
example applying to the main settings.
d) By pressing the key ïanywhere in the sub-menu, you go
back to the main settings change menu:
[SETTINGS CHANGE]
[SPARE ]
6.2.4 Set output relays
a) Press the key òor ñuntil the display shows:
[OUTPUT RELAYS]
[ ]
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