ABB SPAJ 131 C Parts list manual

ABB Network Partner
User´s manual and
Technical description SPAJ 131 C
Overcurrent relay
RS 421 Ser.No.
SPAJ 131 C
2
5
1028D
f
n= 50Hz
60Hz
1
2
3
4
5/
>
tt
n
/
II
n
)(
>
I
n
)(
>>
I
>>
/
tt
%
[]
%
[]
U
aux
80...265V ~
–
18...80V –
n
I
=1A 5A
SPCJ 3C3
REGISTERS
0000
1
2
3
4
5
6
7
8
01
SGR
L1 IRF
>
I
L2
I
L3
I
I
1309
[ ]
s
k>
t
0.5
0.05 1.0
13
2.5
0.5
0.04 1.0
0.5
1.5
2.5 STEP
RESET
SG1
01
1
2
3
4
5
6
7
8
20
STEP
>>
I
n
I
>
I
n
I
>>
I
>>
t
[ ]
s
>
I
>>
I
SPCJ 3C3
B

2
1MRS 750660-MUM EN
Issued 97-02-24
Version A (replaces 34 SPAJ 20 EN1)
Checked
Approved
Data subject to change without notice
Station
Automation
SPAJ 131 C
Overcurrent relay
Contents Features .......................................................................................................................... 2
Application.....................................................................................................................3
Description of operation................................................................................................. 3
Connections ................................................................................................................... 4
Configuration of output relays ....................................................................................... 6
Start and operation indicators......................................................................................... 7
Combined power supply and I/O module ...................................................................... 7
Technical data ................................................................................................................ 8
Examples of application................................................................................................ 10
Secondary injection testing........................................................................................... 18
Maintenance and repair................................................................................................ 22
Spare parts.................................................................................................................... 22
Ordering numbers ........................................................................................................ 22
Dimensions and instructions for mounting .................................................................. 23
Order information........................................................................................................ 23
The complete manual for the three-phase overcurrent relay SPAJ 131 C includes
the following partial manuals:
Overcurrent relay SPAJ 131 C, general description 1MRS 750660-MUM EN
Three-phase overcurrent relay module SPCJ 3C3 1MRS 750602-MUM EN
General characteristics of C-type relay modules 1MRS 750328-MUM EN
Features Three-phase low-set phase overcurrent stage
withdefinite timeorinverse timecharacteristic
High-set phase overcurrent stage with definite
time characteristic
Both overcurrent stages can be blocked by an
external control signal
Output relay functions freely configurable for
desired operation
Flexible adaptation of relay to specific applica-
tions
Localnumericaldisplayofsettingvalues,meas-
ured values and recorded fault values
Serial interface for two-way data communica-
tion over fibre-optic bus between relay and
substation and/or remote control systems
Continuous self-supervision of hardware and
software, including auto-diagnostics

3
Application The overcurrent relay SPAJ 131 C is designed
to be used for two-stage phase overcurrent pro-
tectionofdistributionfeeders,largelow-voltage
motors,high-voltagemotors,medium-sizedand
large generators and power transformers. The
relay can be used both as main protection relay
and back-up protection relay.
The relay has two protection stages: a low-set
overcurrent stage I> and a high-set overcurrent
stage I>>. The low-set stage operates with defi-
nite-time characteristic or with inverse-time
characteristic, while the high-set stage operates
with definite time characteristic only.
The overcurrent relay is provided with five
outputrelays,of whichfourarefreely configur-
ableforthedesiredfunction.Twooftheoutput
relays have heavy-duty contacts capable of di-
rectly controlling a circuit breaker.
TheovercurrentrelaySPAJ131Cisasecondary
relaythatisconnectedtothecurrenttransform-
ersoftheprotectedobject.Therelaycanbeused
forsingle-phase,two-phaseorthree-phaseover-
current protection. The overcurrent relay con-
tinuously measures the phase currents of the
object to be protected. On the occurrence of a
fault the overcurrent relay generates an alarm
signal,tripsthe circuitbreakerorstarts external
auto-reclose functions, in accordance with the
current application.
When the phase current exceeds the set start
value I> of the low-set stage, the overcurrent
relay starts. When, at definite time operation,
the set operate time t> or, at inverse definite
minimum time (IDMT) operation, the calcu-
latedoperatetimet>,expires,therelayoperates.
Inthesamewaythehigh-setstagestartsonceits
setstart valueI>>is exceededand, whentheset
operate time t>> expires, the relay operates.
Thelow-setstageoftheovercurrentrelaycanbe
given either definite-time or inverse-time char-
acteristic. At inverse time characteristic four
inverse time curve sets with different slopes are
available: Normal inverse, Very inverse, Ex-
tremely inverse and Long-time inverse. These
curvesetscomplywiththeBS142andIEC255
standards.
The start signals from the overcurrent relay are
obtainableascontactfunctions.Thestartsignal
canbeused,forinstance,forblockingcooperat-
ing protection relays.
The relay contains one optically isolated logic
input for incoming external control signals,
generally blocking signals.
Description
of operation
Three-phase low-set overcurrent stage
with definite time or inverse definite
minimum time operation characteristic
Three-phase high-set overcurrent stage
with instantaneous or definite time
operation characteristic
Blocking of high-set and/or low-set overcurrent
stages by external control signal
Serial communication
51
50
Tripping 1
Tripping 2
Start 1
IRF
Signal 1
Serial port
Blocking
I
L1
I
L2
I
L3
Fig. 1. Protection functions of the overcurrent relay SPAJ 131 C. The encircled numbers refer to
theANSI(=AmericanNationalStandardsInstitute)numberoftheconcernedprotectionfunction.

4
Connections
Fig. 2. Connection diagram for the three-phase overcurrent relay SPAJ 131 C.
Uaux Auxiliary voltage
A,B,C,D,E Output relays
IRF Self-supervision function
BS Blocking signal
SS Start signal
TS Trip signal
SGR Switchgroup for configuring trip and alarm signals
SGB Switchgroup for configuring blocking signals
TRIP_ Trip output
SIGNAL1 Signal on relay operation
START1 Start signal or signal on relay operation
U1 Three-phase overcurrent relay module SPCJ 3C3
U2 Power supply and I/O module SPTU 240S1 or SPTU 48S1
U3 I/O module SPTE 3E4
SERIAL PORT Serial communication port
SPA-ZC_ Bus connection module
Rx/Tx Optical-fibre receiver terminal (Rx) and transmitter terminal (Tx) of the bus
connection module
L1
L2
L3
0
Ι
0
Ι
-
-
+
+
6
8
73 2 4
5A 1A
5
SGR/1
SPAJ 131 C
U2
U3
U3 1111
DCBA
+-
Uaux
E
+
-
( ~ )
(
~ )
≅
_
5A
1A
5A 1A
5 81 68 661 2 3 4 6 7 8 9 10 11 61 62 70 71 72 77 78 80 69 65
SGR
IRF
START1 SIGNAL1 TRIP2 TRIP1IRFBS
+
TS2
TS1
SGB
SS1
SS2
U1
5
4
I/O
3I>
t >>
t >,k
3I>>
SPA-ZC_
Rx Tx
SERIAL
PORT

5
Fig.3. Rear view of the overcurrent relay SPAJ 131 C
Specification of input and output terminals
Contacts Function
1-2 Phase current IL1 (In= 5 A)
1-3 Phase current IL1 (In= 1 A)
4-5 Phase current IL2 (In= 5 A)
4-6 Phase current IL2 (In= 1 A)
7-8 Phase current IL3 (In= 5 A)
7-9 Phase current IL3 (In= 1 A)
10-11 External blocking signal (BS)
61-62 Auxiliary power supply.
When DC voltage is used the positive pole is connected to terminal 61.
65-66 Trip output 1 for the I> and I>> stages (TRIP 1)
68-69 Trip output 2 for the I> and I>> stages (TRIP 2)
80-81 Signal on tripping of the I> and I>> stages (SIGNAL 1)
77-78 Signal on tripping of stage I>>, starting of the I> and I>> stages (START1)
70-71-72 Self-supervision(IRF)alarm output.Undernormal conditionsthecontact interval
70-72isclosed.Whentheauxiliaryvoltagedisappearsoraninternalfaultisdetected,
the contact interval 71-72 closes.
Protective earth terminal
Made in Finland
1
2
3
4
5
6
7
8
9
70
71
72
61
62
65
66
68
69
80
81
77
78
10
11
TTL
B470372
Rx
Tx
In single-phase applications it is recommended
that the energizing current is routed through
two energizing inputs of the relay connected in
series. This arrangement secures a faster opera-
tion time of the relay, in particular, at instanta-
neous operation.
The overcurrent relay SPAJ 131 C connects to
the fibre optic data communication bus by
means of the bus connection module SPA-ZC
17or SPA-ZC21. Thebusconnectionmodule
is fitted to the D-type connector (SERIAL
PORT)ontherearpaneloftherelay.Theopto-
connectorsoftheopticalfibresarepluggedinto
the counter connectors Rx and Tx on the bus
connection module.

6
In addition, the following functions can be
selected with the switches of the SGR switch-
group on the front panel:
Configuration of
output relays The trip signal of the I> stage is firmly wired to
outputrelayAandthetripsignaloftheI>>stage
is firmly wired to output relay B.
Switch Function Factory User's
settings settings
SGR/1 Routes the ext. blocking signal to the overcurrent module 1
SGR/2 Routes the start signal of the I>> stage to output relay D 1
SGR/3 Routes the start signal of the I> stage to output relay D 1
SGR/4 Routes the trip signal of the I>> stage to output relay D 1
SGR/5 Routes the trip signal of the I>> stage to output relay C 1
SGR/6 Routes the trip signal of the I>> stage to output relay A 1
SGR/7 Routes the trip signal of the I> stage to output relay C 1
SGR/8 Routes the trip signal of the I> stage to output relay B 1
The circuit breakers can be directly controlled
with output relay A or output relay B. Thus
either operation stage may have its own trip
output relay and two separate circuit breakers
can be controlled with the same overcurrent
relay.

7
Start and
operation
indicators
RS 421 Ser.No.
SPAJ 131 C
2
5
1028D
f
n= 50Hz
60Hz
1
2
3
4
5/
>
tt
n
/
II
n
)(
>
I
n
)(
>>
I
>>
/
tt
%
[]
%
[]
U
aux
80...265V ~
–
18...80V –
n
I
=1A 5A
SPCJ 3C3
REGISTERS
0000
1
2
3
4
5
6
7
8
01
SGR
L1
IRF
>
I
L2
I
L3
I
I
1309
[ ]
s
k>
t
0.5
0.05 1.0
13
2.5
0.5
0.04 1.0
0.5
1.5
2.5
STEP
RESET
SG1
01
1
2
3
4
5
6
7
8
20
STEP
>>
I
n
I
>
I
n
I
>>
I
>>
t
[ ]
s
>
I
>>
I
SPCJ 3C3
B
2. TheyellowLEDs(IL1,IL2,IL3)ontheupper
blackpartofthefrontplateindicate,whenlit,
thatthevalueoftheconcernedphasecurrent
is being displayed.
3. TheredIRFindicator oftheself-supervision
system indicates, when lit, that a permanent
internal relay fault has been detected. The
fault code appearing on the display once a
fault has been detected should be recorded
and notified when service is ordered.
4. ThegreenUaux LED onthefront panelis lit
whenthepowersupplymoduleoperatesprop-
erly.
5. The LED indicator below a setting knob
indicates, when lit, that the setting value is
being displayed.
6. The LED of the SG1 switchgroup indicates,
when lit, that the checksum of the switch-
group is being displayed.
Thestartandoperationindicators,thefunction
of the SG2 software switchgroup and the func-
tions of the LED indicators during setting are
described more detailed in the relay module
manual for the three-phase overcurrent relay
module SPCJ 3C3.
1. Either overcurrent stage has its own opera-
tion indicator (I> and I>>), located in the
right bottom corner of the front plate of the
relay module. Yellow light indicates that the
concernedstagehasstartedandredlightthat
the stage has operated (tripped).
WiththeSG2softwareswitchgroupthestart
and trip indicators can be given a latching
function,whichmeansthattheLEDsandthe
output relay remain lit, although the signal
thatcausedoperationreturnstonormal.The
indicators are reset with the RESET push-
button. An unreset indicator does not affect
the operation of the relay.
Combined power
supply and I/O
module
The combined power supply and I/O module
(U2)islocatedbehindthesystemfrontpanelof
theprotectionrelayandcanbewithdrawnfrom
the relay case after removal of the system front
panel.ThepowersupplyandI/Omoduleincor-
porates a power unit, four output relays, the
control circuits of the output relays and the
electronic circuitry of the external control in-
put.
The power unit is transformer connected, that
is,theprimarycircuitandthesecondarycircuits
are galvanically isolated. The primary circuit is
protected by a slow 1 A fuse F1, placed on the
PC board of the module. When the power
source operates properly, the green Uaux LED
on the front panel is lit.
The power supply and I/O module is available
intwoversionswhichhavedifferentinputvolt-
age ranges:
- type SPTU 240S1 Uaux = 80...265 V ac/dc
- type SPTU 48S1 Uaux = 18...80 V dc
Theinputvoltagerangeofthepowersupplyand
I/O module incorporated in the relay on deliv-
ery is marked on the system front panel of the
relay.

8
Technical data Energizing inputs 1 A 5 A
Terminals 1-3, 4-6, 7-9 1-2, 4-5, 7-8
Rated current In1 A 5 A
Thermal withstand capability
Carry continuously 4 A 20 A
Make and carry for 10 s 25 A 100 A
Make and carry for 1 s 100 A 500 A
Dynamic current withstand capability,
half-wave value 250 A 1250 A
Input impedance <100 mΩ<20 mΩ
Rated frequency fn acc. to order 50 Hz or 60 Hz
Output contact ratings
Terminals 65-66, 68-69
Rated voltage 250 V ac/dc
Carry continuously 5 A
Make and carry for 0.5 s 30 A
Make and carry for 3 s 15 A
Breaking capacity for dc, when the manoeuvre
circuit time constant L/R ≤40 ms,
at the control voltages
- 220 V dc 1 A
- 110 V dc 3 A
- 48 V dc 5 A
Contact material AgCdO2
Signalling contacts
Terminals 70-71-72, 77-78, 80-81
Rated voltage 250 V ac/dc
Carry continuously 5 A
Make and carry for 0.5 s 10 A
Make and carry for 3 s 8 A
Breaking capacity for dc, when the signalling
circuit time constant L/R ≤40 ms,
at the control voltages
- 220 V dc 0.15 A
- 110 V dc 0.25 A
- 48 V dc 1 A
Contact material AgCdO2
External control input
Terminals 10-11
Control voltage level 18...265 V dc or
80...265 V ac
Current consumption when input activated 2...20 mA
Auxiliary supply voltage
Power supply and I/O modules and voltage ranges:
- type SPTU 240S1 80...265 V ac/dc
- type SPTU 48S1 18...80 V dc
Power consumption under quiescent/operating
conditions ~4 W/~6 W

9
Three-phase overcurrent relay module SPCJ 3C3
Low-set stage I>
Start current I>, setting range 0.5...2.5 x In
Selectable modes of operation
- definite time characteristic
- operate time t> 0.05...100 s
- inverse definite minimum time (IDMT) characteristic
- curve sets acc. to IEC 255-4 and BS 142 Normal inverse
Very inverse
Extremely inverse
Long-time inverse
- time multiplier k 0.05...1.00
High-set stage I>>
Start current I>>, setting range 0.5...20 x Inand ∞, infinite
Operate time t>> 0.04...100 s
Data communication
Transmission mode Fibre optic serial bus
Data code ASCII
Selectable data transfer rates 300, 1200, 2400, 4800 or 9600 Bd
Fibre optic bus connection module,
powered from the host relay
- for plastic fibre cables SPA-ZC 21 BB
- for glass fibre cables SPA-ZC 21 MM
Fibre optic bus connection module with
a built-in power supply unit
- for plastic fibre cables SPA-ZC 17 BB
- for glass fibre cables SPA-ZC 17 MM
Test voltages *)
Dielectric test voltage (IEC 255-5) 2 kV, 50 Hz, 1 min
Impulse test voltage (IEC 255-5) 5 kV, 1.2/50 µs, 0.5 J
Insulation resistance (IEC 255-5) >100 MΩ, 500 V dc
Disturbance tests *)
High-frequency (1 MHz) disturbance test
(IEC 255-22-1)
- common mode 2.5 kV
- differential mode 1.0 kV
Electrostatic discharge test (IEC 255-22-2
and IEC 801-2), class III
- air discharge 8 kV
- contact discharge 6 kV
Fast (5/50 ns) transients
- IEC 255-22-4, class III
- IEC 801-4, level IV:
power supply inputs 4 kV
other inputs 2 kV
Environmental conditions
Specified ambient service temperature range -10...+55°C
Long term damp heat withstand acc. to IEC 68-2-3 <95%, +40°C, 56 d/a
Relative humidity acc. to IEC 68-2-30 93...95%, +55°C, 6 cycles
Transport and storage temperature range -40...+70°C
Degree of protection by enclosure
for panel mounted relay IP 54
Weight of relay including flush mounting case 3.0 kg
*) The tests do not apply to the serial port, which is used for the bus connection module only.

10
equipment and possible other protection relays
have been omitted.
Examples of
application Fig. 4 shows how the phase overcurrent relay
SPAJ 131 C can be applied for substation pro-
tection.Forreasonsofclaritytheremotecontrol
Fig. 4. Overcurrent relay SPAJ 131 C applied for the protection of a distribution substation.
Inexample1 the low-voltageswitchgear is pro-
tectedbyanovercurrentrelaySPAJ131C.The
trip signal is linked to the HV side circuit
breaker of the distribution transformer.
Inexample2 theovercurrent relay SPAJ131 C
is used for protecting the outgoing feeder of
medium voltage distribution switchgear and in
example 3 it is used for the busbar short circuit
protection.
Theshortcircuitprotectionisbasedonblockings
betweensuccessiveprotectionstages.Insuchan
arrangementtherelaylocatedclosertothefault
gives, when starting, a blocking signal back-
wards to the relay that is closer to the object
supplyingtheshortcircuitcurrent.Ifthereisno
blocking,therelayperceivesthefaultasbeingin
its own protection area and trips the circuit
breaker. As shown in Fig. 4 the busbar protec-
tion can be extended beyond the power trans-
former feeding the busbar system.
3I>
3I>>
3I>
3I>>
3I>
3I>>
3I>
3I>>
Exemple 1
Exemple 2
Exemple 3
110/20 kV
20 kV/380 V
Blocking signal
Tripping signal