ABB SACE PR021/K User manual

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L3016
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ABB SACE SACE PR021/K
SACE PR021/K
SIGNALLING UNIT
EN

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ABB SACE SACE PR021/K
CONTENTS
1. GENERAL INFORMATION ...........................................................................................................................4
1.1. FOREWORD .........................................................................................................................................................4
1.2. APPLICABLE SCENARIOS .........................................................................................................................................5
2. TECHNICAL SPECIFICATIONS......................................................................................................6
2.1. ELECTRICAL CHARACTERISTICS ................................................................................................................................6
2.1.1 Auxiliary power supply......................................................................................................................................... 6
2.2. MECHANICAL CHARACTERISTICS ..............................................................................................................................6
2.3. ENVIRONMENTAL CONDITIONS ..................................................................................................................................6
2.4. COMMUNICATION BUS ............................................................................................................................................6
2.5. INTERNAL RELAY CHARACTERISTICS ..........................................................................................................................6
3. USER INTERFACE ..........................................................................................................................7
3.1. USING THE PUSH-BUTTONS ......................................................................................................................................8
3.2. OPTICAL SIGNALS ..................................................................................................................................................8
3.3. TERMINALBOXES ...................................................................................................................................................9
4. SPECIAL FUNCTIONS ..................................................................................................................10
4.1. RESET ..........................................................................................................................................................10
4.2. RESET SIGNALS ..................................................................................................................................................10
4.3. SELF-TEST FUNCTION...........................................................................................................................................10
4.4. STAND-BY FUNCTION ...........................................................................................................................................10
4.5. OPERATING MODE ..............................................................................................................................................11
4.5.1. Normal mode ..................................................................................................................................................... 11
4.5.2. Latch mode ........................................................................................................................................................ 11
4.5.3. User mode ......................................................................................................................................................... 11
5. INSTALLATION AND SETUP ........................................................................................................12
5.1. INSTALLATION INSTRUCTIONS .................................................................................................................................12
5.2. CONNECTIONS ....................................................................................................................................................12
5.3. DIP-SWITCH SETTINGS ..........................................................................................................................................13
5.3.1. Example of dip-switch setting............................................................................................................................ 14
5.3.2. Default settings................................................................................................................................................... 15
5.3.3. Serial Number ................................................................................................................................................... 15
5.4. SACE PR021/K WITH SACE PR112 UNIT (VERSION “WITH KEY”) ................................................................................... 15
5.4.1. Dip-switch settings ............................................................................................................................................. 15
5.4.2. Signals ............................................................................................................................................................... 16
5.5. SACE PR021/K WITH SACE PR112 UNIT (VERSION “WITHOUT KEY”) ............................................................................. 17
5.5.1. Dip-switch settings ............................................................................................................................................. 17
5.5.2. Signals ............................................................................................................................................................... 18
5.6. SACE PR021/K WITH SACE PR113 UNIT ..................................................................................................................... 19
5.6.1. Dip-switch settings ............................................................................................................................................. 19
5.6.2. Signals ............................................................................................................................................................... 20
5.6.3. Connection of 3 SACE PR021/K units with SACE PR113/P ............................................................................ 21
5.7. SACE PR021/K WITH SACE PR212/P unit.................................................................................................................. 22
5.7.1. Dip-switch settings ............................................................................................................................................. 22
5.7.2. Signals ............................................................................................................................................................... 23
5.8. SACE PR021/K WITH SACE PR212MP-PR222MP UNITS .......................................................................................... 24
5.8.1. Dip-switch settings ............................................................................................................................................. 24
5.8.2. Signals ............................................................................................................................................................... 25
5.9. SACE PR021/K WITH SACE PR222DS UNIT ................................................................................................................ 26
5.9.1. Dip-switch settings ............................................................................................................................................. 26
5.9.2. Signals ............................................................................................................................................................... 27

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5.10. SACE PR021/K WITH SACE PR223EF UNIT ................................................................................................................ 28
5.10.1. Dip-switch settings ............................................................................................................................................. 28
5.10.2. Signals ............................................................................................................................................................... 29
5.11. SACE PR021/K WITH SACE PR121/P unit.................................................................................................................. 30
5.11.1. Dip-switch settings ............................................................................................................................................. 30
5.11.2. Signals ............................................................................................................................................................... 31
5.12. SACE PR021/K WITH SACE PR122/P UNIT.................................................................................................................. 33
5.12.1. Dip-switch settings ............................................................................................................................................. 33
5.12.2. Signals ............................................................................................................................................................... 34
5.13. SACE PR021/K WITH SACE PR123/P unit.................................................................................................................. 35
5.13.1. Dip-switch settings ............................................................................................................................................. 35
5.13.2. Signals ............................................................................................................................................................... 36
5.14. SACE PR021/K WITH SACE PR331/P UNIT.................................................................................................................. 38
5.14.1. Dip-switch settings ............................................................................................................................................. 38
5.14.2. Signals ............................................................................................................................................................... 39
5.15. SACE PR021/K WITH SACE PR332/P unit.................................................................................................................. 41
5.15.1. Dip-switch settings ............................................................................................................................................. 41
5.15.2. Signals ............................................................................................................................................................... 42
5.16. SACE PR021/K WITH SACE PR333/P unit......................................................................................................43
5.16.1. Dip-switch settings ............................................................................................................................................. 43
5.16.2. Signals ............................................................................................................................................................... 44
5.17. WIRING DIAGRAMS ............................................................................................................................................. 46
5.17.1. PR112-PR113-PR121-PR122-PR123-PR331-PR332-PR333 + PR021/K .................................................... 46
5.17.2. PR113/P-PR121/P-PR122/P-PR123/P-PR331/P-PR332/P-PR333/P+ 3 PR021/K units .............................. 47
5.17.3. PR212/P or PR212MP + PR021/K .................................................................................................................... 48
5.17.4. PR212/P + PR212/D-L or PR212/D-M + PR021/K ........................................................................................... 49
5.17.5. PR222-PR223-PR222MP + PR021/K............................................................................................................... 50
6. TROUBLESHOOTING ..................................................................................................................52
6.1. INCASE OF FAULT ...............................................................................................................................................52

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ABB SACE SACE PR021/K
1. General information
1.1. Foreword
Carefully read the whole of this document before installation and start-up of the PR021/K unit.
The PR021/K unit, connected to the Isomax, Emax and Tmax series protection units, allows signalling of various events
which may occur during normal operation of the connected protection unit.
In these events, the PR021/K unit operates the internal relays fitted with power contacts (par. 2.5).
The PR021/K unit also features (only in combination with the protection relays fitted to the Emax series) the ‘Load control’
function. For further information on the ‘Load control’ function, as well as the settings necessary to use this protection,
consult the user manual for the protection relays PR112, PR113, PR122 and PR123.
For correct use and operation of protection units interfaced with the PR021/K unit, the following documents must be
consulted:
•Kit sheet of PR212/P protection unit (doc. no. RH0062)
•Kit sheet of PR212MP protection unit (doc. no. RH0063)
•Kit sheet of PR222MP protection unit (doc. no. 1SDH000436R0506)
•User manual for PR112/P protection unit (doc. no. RH0288 for IEC version or RH0109 for UL version)
•User manual for PR113/P protection unit (doc. no. RH0288 for IEC version or RH0109 for UL version)
•User manual for PR222DS protection unit (doc. no. 1SDH000436R0502 for IEC version or 1SDH000549R0001 for UL
version)
•User manual for PR223EF protection unit (doc. no. 1SDH000538R0001 for IEC version)
•User manual for PR121/P protection unit (doc. no. 1SDH000460R0001 for IEC version or 1SDH000532R002 for UL
version)
•User manual for PR122/P protection unit (doc. no. 1SDH000460R0001 for IEC version or 1SDH000532R002 for UL
version)
•User manual for PR123/P protection unit (doc. no. 1SDH000460R0001 for IEC version or 1SDH000532R002 for UL
version)
•User manual for PR331/P protection unit (doc. no. 1SDH000587R0001 for IEC version or ????????????????? for UL
version)
•User manual for PR332/P protection unit (doc. no. 1SDH000587R0001 for IEC version or ????????????????? for UL
version)
•User manual for PR333/P protection unit (doc. no. 1SDH000587R0001 for IEC version or ????????????????? for UL
version)
•ABB SACE Isomax technical catalogue
•ABB SACE Emax technical catalogue

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1.2. Applicable scenarios
The following block diagrams show the applicable scenarios and the relationship between:
•Protection units (Isomax, Emax or Tmax series)**
•PR021/K unit
•Communication units (Isomax, Emax or Tmax series)**
**: for Emax and Tmax series, the protection unit contains an internal communication unit (when required).
Connections between various units, depending on the scenario (Master or Slave mode) are shown as a guiding reference
only, therefore wiring must be carried out according to official ABB SACE documentation.
PR021/K
Signalling
unit
Protection unit
Local bus
PR021/K
Slave
PR021/K
Slave
Local bus
Protection
unit
PR021/K
Master
PR021/K
Signalling
unit
Local bus
Protection
unit
Communicationunit
System bus
Remote supervision
system
“Master Mode” scenario:
“Slave Mode” scenario:
Mixed “Master+Slave” scenario:


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2. Technical specifications
2.1. Electrical characteristics
Active operation: Maximum 5s after power on
MTBF (MIL-HDBK-217E) expected: 15 years at 45°C
2.1.1. Auxiliary power supply
As the Vaux must be isolated from earth, it is necessary to use ‘galvanically separate converters’ conforming to IEC
60950 (UL1950) or equivalent Std. [which guarantee a common mode current or leakage current (see IEC 478/1, CEI 22/
3) not greater than 3.5mA], IEC 60364-41 and CEI 64-8.
2.2. Mechanical characteristics
Casing: Polyamide plastic (no metal parts)
Protection grade: IP20
Dimensions: 95 x 53 x 112mm (h x l x d)
Weight: 330g (including 2 front connectors)
2.3. Environmental conditions
Operating environmental temperature: -5°C ... +70°C
Storage temperature: -40°C ... +90°C
Relative humidity: 5 ... 90% (without condensation)
Atmospheric pressure: 1bar, 0…2000m
2.4. Communication Bus
Exclusive ABB SACE communication bus (local bus)
2.5. Internal relay characteristics
Type: Monostable STDP
Maximum switching capacity: 100W / 1250VA (resistive load)
Maximum switching voltage: 130VDC / 250VAC
Maximum switching current: 5A
Breaking power (UL/CSA) @ 30VDC (resistive load): 3.3A
Breaking power (UL/CSA) @ 250VAC (resistive load): 5A
Contact/coil isolation: 2000V eff (1 min. @ 50Hz)

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3. User interface
One push-button, ten LEDs and two terminal boxes are provided on unit’s front panel.
Should the user wish to customize the LEDs, the customizable adhesive rating plate may be used (RE0433/001),
supplied together with the SACE PR021/K unit.
Terminal boxes (see par. 3.3)
Push-button (see par. 3.1)
LEDs(seepar. 3.2) Theareaborderedbya
dashedlineisintendedfor
the possible application of a
customizableadhesive
ratingplate
Areas to be cutomized
byuser

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Description of events signalled by the LEDs PW/WD and TX/RX
Caption:
XX = don’t care
BLINK = Flashing synchronized with activity of the local bus (the LED is on for 1 ms for each message received or transmitted)
R/V 2Hz = intermittent red/green lighting at 2Hz.
(*) Each flash is equivalent to relevant LED lighting for 200 ms, with a repetition period of 2s. The following priorities are
introduced to handle cases in which more than one signal is active:
3.1. Using the push-buttons
• Reset:
Press to reset the PR021/K hardware.
3.2. Optical signals
Description of events signalled by the LEDs K51/1...K51/8
Off On Flashing
K51/1 (green) Contact K51/1 open Contact K51/1 closed --
K51/2 (green) Contact K51/2 open Contact K51/2 closed --
K51/3 (green) Contact K51/3 open Contact K51/3 closed --
K51/4 (green) Contact K51/4 open Contact K51/4 closed --
K51/5 (green) Contact K51/5 open Contact K51/5 closed --
K51/6 (green) Contact K51/6 open Contact K51/6 closed --
K51/7 (green) Contact K51/7 open Contact K51/7 closed --
K51/8 (green) Contact K51/8 open Contact K51/8 closed --
PR021/K O
p
eratin
g
conditions
Descri
p
tion of LEDs
LED state
PW/WD TX/RX
GREEN OFF If PR021/K is Slave then there is no communication
GREEN ON Not contemplated
GREEN 4 flashes (*) Bus KO
GREEN 3 flashes (*) Failure to identify the protection unit
GREEN 2 flashes (*) Indicates that the Dip-switch K51 Dis/En is in the ON position
GREEN 1 flash (*) Indicates that the Dip-switch TEST Dis/En is in the ON position
GREEN BLINK Operating mode
RED XX WD hardware error
R/V 2Hz OFF Programming Mode
R/V 2Hz ON Programming successfully completed
R/V 2Hz 2Hz flashing Programming failed
OFF OFF Unit off
OFF ON Not contemplated
PR021/K O
p
eratin
g
conditions
Descri
p
tion of LEDs Meaning

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•The LED test, consisting of all LEDs lighting up in sequence, takes place when the PR021/K unit is switched on;
the LED status is subsequently linked to normal unit operation.
•Any LED lighting state which does not conform with the above conditions, probably indicates a malfunction of the
SACE PR021/K unit.
•The indications given in the above table are with Vaux installed.
•For further details of possible malfunction conditions, see par. 6.
3.3. Terminal boxes
Connections 1...26 inputs and outputs of PR021/K unit (see pars. 5.1 and 5.2).
Signal Priority
Bus KO high priority
Missing identification
K51 Dis/En
Test Dis/En low priority

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4. Special functions
4.1. Reset
The PR021/K unit can be reset by pressing the ‘Reset’ push-button on the front panel of the unit (see par. 3.1).
This type of reset restarts the Sw of the PR021/K unit (the data stored in the RAM are erased).
4.2. Reset signals
“Reset signals” causes the internal relays (K51/1...8) to be returned to their rest condition (contact open).
If the “AUTOMATIC RESET” function is not selected, to reset the signals, proceed as follows:
- carry out a reset (see par. 4.1), if the applicable scenario is “PR021/K in Master mode” (see par. 1.2)
- send a “Trip Reset “ command from the remote supervision system
- carry out a reset (see par. 4.1), if the applicable scenario is “PR021/K in Slave mode” (see par. 1.2), on the Emax series
protection unit (PR112 or PR113).
If the “AUTOMATIC RESET” function is selected, to reset the signals simply carry out a trip reset on the protection unit
and the signals on the PR021/K unit will also be reset automatically.
4.3. Self-test function
To carry out the self-test, dip-switch no. 1 must be set to ON (see par. 5.3) then the reset push-button is pressed.
The self-test switches all 8 internal relays of the unit in sequence, and activates the related indicator LED
K51/1...K51/8 (see par. 3.2).
The Tx/Rx LED lights on each switching, and once the self-test is finished, it will flash according to the indications listed
in par. 3.2.
The self-test takes approx. 10s, thereafter the SACE PR021/K unit automatically returns to normal operation.
N.B. If dip-switch no. 1 is ON, the Self-test function is also activated when the PR021/K unit is powered on.
4.4. Stand-by function
To select the Stand-by mode, dip-switch no. 8 must be set to ON (see par. 5.3) then the reset push-button is pressed;
in this operating mode, the internal relays of the unit will not be switched (but the related indicator LEDs K51/1...K51/8
will still light).
While operating in Stand-by mode, the Tx/Rx LED will flash according to the instructions listed in par. 3.2.
This function is used when the protection unit is being tested (for example with PR010/T unit) and switching of the relays
of the PR021/K unit is not desired.
N.B. If dip-switch no. 8 is ON, the Stand-by function is also activated when the PR021/K unit is powered on.

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4.5. Operating Mode
Depending on the setting of the dip switches and the protection unit connected, one of three operating modes may be
selected. The Signals section of each protection unit includes signal tables for each of the operating modes.
A description of the operating modes is given below.
4.5.1. Normal mode
4.5.1.1. Normal mode with AUTOMATIC RESET disabled
To disable Automatic Reset, dip-switch no. 10 will be set to MAN (see par. 5.3), thereafter press the reset push-button
or switch PR021/K off and on.
In this operating mode each contact is associated with an event that causes the contact to close; with some contacts,
the associated event can be selected from two events by setting a dip switch (dip switch nos. 2, 3, 4).
When the protection release trips, the status of the contacts is “frozen” (any change in status of the protection is not
reflected in a change in status of the contacts). In this status, only the “protection release TRIP alarm” contact and the
contact that represents the protection that caused the trip, will be closed. For example, if protection S (selective short-
circuit) trips, the “protection release TRIP alarm” contact and the “Protection S trip (selective short-circuit)” contact will
be closed.
You can exit from the “frozen” status by resetting the signals (see par. 4.2).
4.5.1.2. Normal mode with AUTOMATIC RESET enabled
To select the Automatic Reset function, dip-switch no. 10 will be set to AUT (see par. 5.3), thereafter press the reset
push-button or switch PR021/K off and on.
In this operating mode, the signals are the same as in Normal mode (see par. 4.5.1.1), the only difference being that, to
exit from “frozen” status following a TRIP, the trip can be directly reset on the protection unit (see user manual of the
protection unit used).
4.5.2. Latch mode
To select the Latch function, dip-switch no. 11 must be set to ON (see par. 5.3) and the reset button then be pressed or
the PR021/K unit be switched off and on
In this mode, the signals associated with each individual contact, once activated, are maintained (self-retaining of
contacts) until the signals have been reset (see par. 4.2).
N.B. When Latch mode is activated, the automatic reset function is automatically disabled irrespective of the setting
of dip-switch no. 10.
4.5.3. User mode
To select the User function, dip-switch no. 5 must be set to B (see par. 5.3) and the reset button then be pressed or the
PR021/K unit be switched off and on
In this mode, all contacts from K51/1 to K51/8 - excluding contact K51/5 - are solely associated with the function
selected on the protection unit (refer to user manual of the protection unit used); contact K51/5 is always associated with
the “Communication problems on local bus (KO bus)” indication.
N.B. When User mode is activated, the automatic reset and Latch mode functions are automatically disabled irrespec-
tive of the setting of dip-switches no. 10 and no. 11

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5. Installation and setup
5.1. Installation instructions
Mount on standard 35mm guide (DIN EN50022 type TS 35 x 15mm).
For the removable front connectors use cables with conductors having a cross-section from:
- 0.5 to 1.5mm2(AWG 22...14) for connections to terminals 1...10;
- 0.5 to 2.5mm2(AWG 22...12) for connections to terminals 11...26 (maximum current for each terminal is 5A continuous
rating, and 10A for a maximum of 2 seconds).
An earth terminal is provided on a front connector, to connect the electronic circuit to the installation earth.
Dielectric strength tests must not be carried out on the inputs and outputs of the PR021/K unit.
Although the PR021/K unit can be installed in the circuit-breaker compartment, it is good practice to install the unit in the
instrument compartment on the switchboard.
5.2. Connections
Carefully study the relevant wiring diagrams for wiring the terminals.
For the dedicated inputs and outputs, wiring other than that described in the official ABB SACE wiring diagrams, is not
allowed.

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5.3. Dip-switch settings
After correctly wiring all front connections, it is necessary to set the dip-switches on the top of the PR021/K unit.
The criteria for wiring the front connections and for dip-switch setting, depend upon the type of protection unit connected
to the PR021/K unit; the following paragraphs detail the possible configurations.
N.B.: dip-switch reading is carried out at “power on” or after a hardware reset (pressing front “Reset” button) and is active
after start-up.
.
.
DIS. = self-test disabled
EN. = self-test enabled
2
3
4
5
9 PROG. OFF = Operating mode
ON = Programming mode
For ABB SACE use only.
For normal operating mode, set this dip-switch to OFF.
13 N.U. OFF = - -
ON = - -
Not used.
For normal operating mode, set this dip-switch to OFF.
12 Term.
OFF = Termination switched
off
ON = Termination switched on
Turn (ON) to terminate the local bus with a 120 resistance
The choice depends on the actual position of the PR021/K unit on the backbone of the communication system.
11 LATCH OFF = latch OFF
ON = latch ON
If Latch is enabled, the signals of each individual relay are maintained (self-retained) and can only be reset by a
reset command (see par. 4.2).
10 RESET MAN = manual reset
AUTO = automatic reset
This dip-switch is used to select the reset mode.
Manual reset: in the case of a trip, the signals are "frozen" until a reset is carried out (see par. 4.2)
Automatic reset: the signals of a trip are reset automatically when the trip on the protection unit is reset. In this
case, to reset the signals of the PR021/K unit, the trip signals on the protection unit must be reset.
8 K51/ EN.= Normal mode
DIS.= Stand-by mode
Normal operating mode ensures that the K51 contacts switch when the conditions which normally cause
switching exist (normal operating) and the related indicator LED lights.
Stand-by mode ensures that the K51 contacts do not switch under any circumstances, even under conditions
which would normally cause switching (the indicator LEDs K51/1...K51/8 will still light).
If set to ON (Stand-by) the unit is not able to carry out a self-test (performs the self-test by activating the LEDs
only).
For normal operating mode, set this dip-switch to OFF.
7BAUD
19.2kbit/s = baud rate
19200bit/s
38.4kbit/s = baud rate
38400bit/s
Setting of the transmission speed must be equal to that of the connected protection unit.
K51
Configuration
A= type A signal
B= type B signal
Depending on the type of protection unit to which the PR021/K unit is connected, the signal of the event
associated with switching of some contacts (K51) may be chosen from two alternatives (A or B).
N.B. For some protection units, an alternative which can be selected using the dip-switches is not provided. In
this case the event associated with each contact is unique (defined by ABB SACE), and is independent of the
position of the dip-switch (OFF or ON).
6MODE
SLAVE = Slave mode
MASTER = Master mode
Setting to Master mode is necessary when the PR021/K unit is combined with a protection unit without a
communication unit (see "scenario PR021/K in Master mode" and mixed "Master+Slave" scenario, par. 1.2).
Setting to Slave mode is necessary when the PR021/K unit is connected to a protection unit and a master
communication unit (see "scenario PR021/K in Slave mode" and mixed "Master+Slave" scenario, par. 1.2).
Dip-sw name Settable val ues Notes
1TEST
The "Self-test" function switches all 8 internal relays in sequence.
The Tx LED lights on each switching, and will flash once the self-test is finished according to the indications
listed in par. 3.2.
For normal operating mode, set this dip-switch to OFF.
Dip-sw no.
Ω

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5.3.1. Example of dip-switch setting
Example of dip-switch setting for connecting the PR021/K unit.
12 13
Dip-sw description No.
12 3 4 5 6 7 8 91011
TEST: EN
K51 Configuration:B
K51 Configuration: A
K51 Configuration: B
K51 Configuration: A
MODE: MASTER BAUD: 19.2kb/s K51/: EN.
PROG.: OFF
RESET:MAN LATCH: OFF
Term.: OFF N.U.: OFF
Dip-switchesforsetting
theoperatingmode
PR021/K top view

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5.3.2. Default settings
The PR021/K unit is supplied by ABB SACE with the following parameters pre-set:
5.3.3. Serial Number
The Serial Number label is positioned on the left side, at the top.
5.4. SACE PR021/K with SACE PR112 unit (version “with key”)
5.4.1. Dip-switch settings
To use the PR021/K unit with the PR112/P protection unit, the dip-switches must be set as follows:
Dip-sw no. Dip-switch
description
Dip-switch
position Value set
1 TEST DIS.
2
3
4
5
6MODE SLAVE
7 BAUD 19.2kbit/s
8 K51/ EN.
9 PROG. OFF
10 RESET MAN
11 LATCH OFF
12 Term. OFF
13 N.U. --
OFF
K51
CONFIGURATION Mode A
DIS. Self-test enabled
EN. Self-test disabled
2A/B
3A/B
4A/B
5A Not used, set A
MASTER • "Master" scenario
• Master unit in mixed "Master+Slave" scenario
7 BAUD 19.2kbit/s Set 19.2 kbit/s
EN. Operating mode
DIS. Stand-by mode enabled
9 PROG. OFF Set this dip-switch to OFF
MAN Manual Reset mode
AUT Automatic Reset mode
OFF Normal mode
ON Latch mode
12 Term. OFF See par. 5.3
13 N.U. OFF Not used
Setting Notes
K51
Configuration
SLAVE
Select A or B to choose the functions of the relays
(see par. 5.5.2)
6MODE
• "Slave" scenario
• Slave unit in mixed "Master+Slave" scenario
Dip-sw
no.
Dip-sw
name
11 LATCH
8 K51/
10 RESET
1TEST

In the example, the PR021/K has been set as follows:
•Self-test function disabled
•K51 configuration = A-A-A-A
•Master mode
•Baud rate = 19.2Kb/s
•Stand-by function not active
•Manual Reset mode
•Latch mode disabled
•Local bus not terminated
5.4.2. Signals
The signals (K51/1...K51/8) for the SACE PR112 protection release may be divided into 2 modes: Normal and Latch. A
description of the signals in these modes is given below.
5.4.1.1. Normal mode (see par. 4.5.1)
Dip-switch no. 11 to be set to its OFF position.
Example of dip-switch settings for the PR021/K unit to be connected to the SACE PR112/P release
12 34
56
78
910
11 12 13
F
OFF
ON
Note 1: Following a TRIP, the status of the signals is frozen signalling the trip (K51/7) and the protection that caused
it.
Note 2: If dip switch no. 10 (RESET) is set to its “MAN” position, the signals may be reset as described in par. 4.2.
Note 3: If dip switch no. 10 (RESET) is set to its “AUT” position, the signals are reset automatically when the trip on
the protection unit is reset (see par. 4.2).
12345678 91011 12 13
Electric
contact Event that caused closing of the relay
K51/1 L protection alarm or trip (overload)
K51/2 S protection alarm or trip (selective short-circuit)
K51/3 I protection trip (instantaneous short-circuit)
K51/4 G protection alarm or trip (earth fault)
K51/5 Communication problems on the local bus (bus KO)
K51/6 Internal overtemperature alarm or trip
K51/7 Protection release TRIP alarm
K51/8 L function prealarm (overload)

17/52
L3016
1SDH000559R0002
ABB SACE SACE PR021/K
5.5. SACE PR021/K with SACE PR112 unit (version “without key”)
5.5.1. Dip-switch settings
To use the PR021/K unit with the PR112/P protection unit, the dip-switches must be set as follows:
5.4.1.2. Latch mode (see par. 4.5.2)
Dip-switch no. 11 to be set to its ON position.
Electric
contact Event that caused closing of the relay Selection of dip-switches no. 2, 3, 4
A = L protection alarm (overload) dip no. 2 = A
B = L protection trip (overload) dip no. 2 = B
A = S protection alarm (selective short-circuit) dip no. 3 = A
B = S protection trip (selective short-circuit) dip no. 3 = B
K51/3 I protection trip (instantaneous short-circuit) ---
A = G protection alarm (earth fault) dip no. 4 = A
B = G protection trip (earth fault) dip no. 4 = B
K51/5 Communication problems on the local bus (bus KO)
K51/6 Internal overtemperature alarm ---
K51/7 Protection release TRIP alarm ---
K51/8 L function prealarm (overload) ---
K51/1
K51/2
K51/4
DIS. Self-test enabled
EN. Self-test disabled
2A/B
3A/B
4A/B
5A Not used, set A
MASTER • "Master" scenario
• Master unit in mixed "Master+Slave" scenario
7 BAUD 19.2kbit/s Set 19.2 kbit/s
EN. Operating mode
DIS. Stand-by mode enabled
9 PROG. OFF Set this dip-switch to OFF
MAN Manual Reset mode
AUT Automatic Reset mode
OFF Normal mode
ON Latch mode
12 Term. OFF See par. 5.3
13 N.U. OFF Not used
Setting Notes
K51
Configuration
SLAVE
Select A or B to choose the functions of the relays
(see par. 5.4.2)
6MODE
• "Slave" scenario
• Slave unit in mixed "Master+Slave" scenario
Dip-sw
no.
Dip-sw
name
11 LATCH
8 K51/
10 RESET
1TEST

L3016
1SDH000559R0002 18/52
ABB SACE SACE PR021/K
In the example, the PR021/K has been set as follows:
•Self-test function disabled
•K51 configuration = A-A-A-A
•Master mode
•Baud rate = 19.2Kb/s
•Stand-by function not active
•Manual Reset mode
•Latch mode disabled
•Local bus not terminated
Example of dip-switch settings for the PR021/K unit to be connected to the SACE PR112/P release
Note 1: Following a TRIP, the status of the signals is frozen signalling the trip (K51/7) and the protection that caused
it.
Note 2: The signals bearing this marking are not frozen as indicated in Note 1.
Note 3: If dip switch no. 10 (RESET) is set to its “MAN” position, the signals may be reset as described in par. 4.2.
Note 4: If dip switch no. 10 (RESET) is set to its “AUT” position, the signals are reset automatically when the trip on
the protection unit is reset (see par. 4.2).
Note 5: If a trip is caused by a protection function not included in the set of signals (for example, a trip for “protection
G” has occurred but the K51/4 relay was set for the “Function L prealarm” signal), only the K51/7 relay (the
protection release TRIP alarm) will be switched.
5.5.2. Signals
The signals (K51/1...K51/8) for the SACE PR112 protection release may be divided into 2 modes: Normal and Latch. A
description of the signals in these modes is given below.
5.5.2.1. Normal mode (see par. 4.5.1)
Dip-switch no. 11 to be set to its OFF position.
12 34
56
78
910
11 12 13
OFF
ON
12345678 91011 12 13
Electric
contact Event that caused closing of the relay Selection of dip-switches no. 2, 3, 4
K51/1 L protection alarm or trip (overload) ---
K51/2 S protection alarm or trip (selective short-circuit) ---
K51/3 I protection trip (instantaneous short-circuit) ---
A = G protection alarm or trip (earth fault) dip no. 2 = A
B = L function prealarm (overload) dip no. 2 = B
Communication problems on the local bus (bus KO) dip no. 3 = A
Internal overtemperature alarm or trip dip no. 3 = B
K51/6 LC1 load control (Note 2) ---
K51/7 Protection release TRIP alarm ---
K51/8 LC2 load control (Note 2) ---
K51/5
K51/4

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L3016
1SDH000559R0002
ABB SACE SACE PR021/K
5.6. SACE PR021/K with SACE PR113 unit
5.6.1. Dip-switch settings
To use the PR021/K unit with the PR113/P protection unit, the dip-switches must be set as follows:
5.5.2.2. Latch mode (see par. 4.5.2)
Dip-switch no. 11 to be set to its ON position.
Electric
contact Event that caused closing of the relay Selection of dip-switches no. 2, 3, 4
A = L protection alarm (overload) dip no. 4 = A
B = L protection trip (overload) dip no. 4 = B
K51/2 S protection alarm (selective short-circuit) ---
K51/3 I protection trip (instantaneous short-circuit) ---
A = G protection alarm (earth fault) dip no. 2 = A
B = L function prealarm (overload) dip no. 2 = B
A = Communication problems on the local bus (bus KO) dip no. 3 = A
B = Internal overtemperature alarm dip no. 3 = B
K51/6 LC1 load control ---
K51/7 Protection release TRIP alarm ---
K51/8 LC2 load control ---
K51/1
K51/4
K51/5
DIS. Self-test enabled
EN. Self-test disabled
2A/B
3A/B
4A/B
5A/B
MASTER • "Master" scenario
• Master unit in mixed "Master+Slave" scenario
7 BAUD 38.4kb/s Set 38.4 kbit/s
EN. Operating mode
DIS. Stand-by mode enabled
9 PROG. OFF Set this dip-switch to OFF
MAN Manual Reset mode
AUT Automatic Reset mode
OFF Normal mode
ON Latch mode
12 Term. OFF See par. 5.3
13 N.U. OFF Not used
6MODE
Setting Notes
K51
Configuration
SLAVE
Select A or B to choose the functions of the relays
(see par. 5.6.2)
• "Slave" scenario
• Slave unit in mixed "Master+Slave" scenario
Dip-sw
no.
Dip-sw
name
11 LATCH
8K51/
10 RESET
1 TEST

L3016
1SDH000559R0002 20/52
ABB SACE SACE PR021/K
Example of dip-switch settings for the PR021/K unit to be connected to the SACE PR113/P release
In the example, the PR021/K has been set as follows:
•Self-test function disabled
•K51 configuration = A-A-A-A
•Master mode
•Baud rate = 38.4Kb/s
•Stand-by function not active
•Automatic Reset mode
•Latch mode disabled
•Local bus not terminated
OFF
ON
12345678 91011 12 13
5.6.2. Signals
The signals (K51/1...K51/8) for the SACE PR113 protection release may be divided into 3 modes: Normal, Latch and
User. A description of the signals in these modes is given below.
5.6.2.1. Normal mode (see par. 4.5.1)
The dip-switches are to be set as follows: Dip-switch no. 5 = A, Dip-switch no. 11 = OFF.
Note 1: Following a TRIP, the status of the signals is frozen signalling the trip (K51/7) and the protection that caused
it.
Note 2: The signals bearing this marking are not frozen as indicated in Note 1, but follow the status indicated by the
protection irrespective of the protection trip.
Note 3: If dip switch no. 10 (RESET) is set to its “MAN” position, the signals may be reset as described in par. 4.2.
Note 4: If dip switch no. 10 (RESET) is set to its “AUT” position, the signals are reset automatically when the trip on
the protection unit is reset (see par. 4.2).
Note 5: If a trip is caused by a protection function not included in the set of signals (for example, a trip for “protection
G” has occurred but the K51/4 relay was set for the “minimum voltage (MT) coil energized” signal), only the
K51/7 relay (the protection release TRIP alarm) will be switched.
Electric
contact Event that caused closing of the relay Selection of dip-switches no. 2, 3, 4
A = L protection alarm or trip (overload) dip no. 2 = A
B = L function prealarm (overload) dip no. 2 = B
K51/2 S protection alarm or trip (selective short-circuit) ---
K51/3 I protection trip (instantaneous short-circuit) ---
A = G protection alarm or trip (earth fault) dip no. 3 = A
B = Minimum voltage coil (MT) energized dip no. 3 = B
A = Communication problems on the local bus (bus KO) dip no. 4 = A
B = Overtemperature alarm or trip dip no. 4 = B
K51/6 LC1 load control (Note 2) ---
K51/7 Protection release TRIP alarm ---
K51/8 LC2 load control (Note 2) ---
K51/1
K51/4
K51/5