ABB SPAU 130 C Parts list manual

12
IRF
>
U
23
U
31
U
U
1315
[ ]
s
k>
t
0.5
0.05 1.0
0.8
0.4
5.0
1.0 12
0.8
1.2
1.6
STEP
RESET
SG1
01
1
2
3
4
5
6
7
8
<
U
n
U
>
U
<
t
[ ]
s
>
U
<
U
SPCU 3C14
n
U
<
U
1.2
STEP
RS 422 Ser.No.
SPAU 130 C
2
5
1308
f
n= 50Hz
60Hz
1
2
3
4
5
6
7
8/
>
tt
n
)(
>
n
)(
<
<
/
tt
%
[]
%
[]
U
aux
80...265V ~
–
18...80V –
SPCU 3C14
REGISTERS
0000
1
2
3
4
5
6
7
8
01
SGR
n
/
UU
U
U
n
U
=100V 110V
>
n
/
UU
max
n
/
UU
<
n
/
UU
min
SPAU 130 C
Three-phase overvoltage and
undervoltage relay
User´s manual and Technical description

2
SPAU 130 C
Three-phase
overvoltage and
undervoltage relay
Contents Features .......................................................................................................................... 2
Application .....................................................................................................................3
Function ......................................................................................................................... 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 applications............................................................................................... 10
Secondary injection testing ........................................................................................... 17
Maintenance and repair ................................................................................................ 21
Exchange and spare parts .............................................................................................. 21
Ordering numbers ........................................................................................................ 21
Dimensions and mounting ........................................................................................... 22
Order information ........................................................................................................ 22
The complete manual for the combined overvoltage and undervoltage relay SPAU 130 C
includes the following submanuals:
Three-phase overvoltage and undervoltage relay, general part 1MRS 750638-MUM EN
Overvoltage and undervoltage relay module SPCU 3C14 1MRS 750510-MUM EN
General characteristics of C-type relay modules 1MRS 750328-MUM EN
Features Combined overvoltage and undervoltage pro-
tection relay
Three-phase definite time or inverse time over-
voltage stage
Three-phase definite time undervoltage stage
Control input for blocking of the function of
the undervoltage stage by means of an external
control signal
Automatic blocking of the undervoltage stage
on loss of energizing voltage
Fully field-configurable output relay functions
Flexible matching of the relay to the intended
protection application
Numerical display of setting values, measured
values, recorded fault values, indications etc.
Serial interface for bus connection module and
optical-fibre substation bus
Continuous self-supervision of relay hardware
and software for enhanced system reliability and
availability
Auto-diagnostic fault indication to facilitate
repair after detection of permanent internal
relay fault
Powerful software support for parametrization
and supervision of the relay
The relay is a member of the SPACOM product
family and PYRAMID®, ABB's coordinated
protection and control concept
1MRS 750638-MUM EN
Issued 97-02-07
Version A (replaces 34 SPAU 15 EN1)
Checked TK
Approved TK
Data subject to change without notice

3
The three-phase voltage relay SPAU 130 C is
intended to be used for overvoltage and under-
voltage protection and supervision in distribu-
tion substations. The relay can also be used for
overvoltage and undervoltage protection of gen-
erators, motors and transformers. Generally the
relay measures the three phase-to-phase voltages
of the system but it can also be programmed for
single-phase measurement.
The overvoltage stage can be given definite time
characteristic or inverse time characteristic. The
undervoltage stage features definite time char-
acteristic alone.
The operation of the undervoltage stage can be
blocked by means of an external control signal.
The relay forms a whole including an over-
voltage stage, an undervoltage stage as well as
flexible trip and alarm functions.
Application
The combined overvoltage and undervoltage
relay SPAU 130 C is a secondary relay that is
connected to the voltage transformers of the
protected object. The relay generally measures
the three phase-to-phase voltages of the system.
On operating the relay trips the circuit breaker
and/or provides alarm, in accordance with the
selected functions and given configuration.
When one of the phase-to-phase voltage or
several exceed the set start value U> of the
overvoltage stage, the overvoltage stage starts
delivering a start signal SS1. When, at definite
time mode of operation, the set operate time t>
or, at inverse time mode of operation, the calcu-
latedoperatetime t>,hasexpired, theovervoltage
stage operates delivering a trip signal TS1. In the
same way the undervoltage stage starts deliver-
ing a start signal SS2 when the measured value
goes below the start value U< and when the set
operate time t< has expired, the undervoltage
stage operates, delivering a trip signal TS2.
The overvoltage and undervoltage relay is gen-
erally used as a three-phase relay. But by means
of a selector switch the relay can be configured
as a single phase relay.
The overvoltage stage can be given definite time
characteristic or inverse time characteristic.
When inverse time characteristic is selected two
sets of curves named A and B are available.
The undervoltage stage has definite time charac-
teristic. Tripping of the undervoltage stage can
be blocked by means of a control signal BS
applied to the optically isolated external control
input of the relay.
The overvoltage and undervoltage relay is pro-
vided with two output relays for tripping and
three output relays for signalling purposes. One
of the signalling relays is dedicated for the
selfsupervision system of the relay.
Description
of function
Fig. 1. Protection functions of the combined overvoltage and undervoltage relay SPAU 130 C. The
encircled numbers refer to the ANSI (=American National Standards Institute) number of the
concerned protection function.
THREE-PHASE DEFINITE TIME OR
INVERSE TIME OVERVOLTAGE
STAGE
THREE-PHASE DEFINITE TIME
UNDERVOLTAGE STAGE
EXTERNAL BLOCKING FUNCTION FOR
THE UNDERVOLTAGE STAGE
SERIAL COMMUNICATION
59
27
TRIP 1
TRIP 2
START 1
IRF
SIGNAL 1
SERIAL I/O
U12
BLOCKING
U23
U31

4
Connections
Fig. 2. Connection diagram for the combined overvoltage and undervoltage relay SPAU 130 C
Uaux Auxiliary voltage
A,B,C,D,E Output relays
IRF Self-supervision signal
SS_ Start signal
TS_ Trip signal
SGR Switchgroup for configuring trip and alarm signals
SGB/5 Switch for blocking the undervoltage stage
TRIP_ Trip output
SIGNAL1 Signal on relay operation
START1 Start signal or signal on relay operation
U1 Combined overvoltage and undervoltage relay module SPCU 3C14
U2 Power supply and I/O module SPTU 240S1 or SPTU 48S1
U3 I/O module SPTE 3E15
SERIAL PORT Serial communication port
SPA-ZC_ Bus connection module
Rx/Tx Optical-fibre receiver (Rx) and transmitter (Tx) of the bus connection module
≅
SGR/1
U2
U3
U3 111
1
DCBA
+-
Uaux
E
+
-
(~)
(~)
L1
L2
L3
A
N
a
SGR
100V
110V
19 20 21 10 11 61 62 70 71 72 77 78 80 81 68 69 65 66
75324 68
SPAU 130 C
_
SPA-ZC_
Rx Tx
START1 SIGNAL1 TRIP2 TRIP1
BS IRF
100V 110V
16 1718
100V 110V
1314 15
IRF
3U< TS2
TS1
SGB/5
SS1
SS2
U1
I/O
t<
t>,k>
3U>
SERIAL
PORT
n

5
Fig.3. Rear view of the overvoltage and undervoltage relay SPAU 130 C
Specification of input and output terminals
Contacts Function
13-14 Phase-to-phase voltage U12 (100 V)
13-15 Phase-to-phase voltage U12 (110 V)
16-17 Phase-to-phase voltage U23 (100 V)
16-18 Phase-to-phase voltage U23 (110 V)
19-20 Phase-to-phase voltage U31 (100 V)
19-21 Phase-to-phase voltage U31 (110 V)
10-11 External blocking signal input
61-62 Auxiliary power supply.
When DC voltage is used the positive pole is connected to terminal 61.
65-66 Trip output 1 for stages U> and U< (TRIP 1)
68-69 Trip output 2 for stages U> and U< (TRIP 2)
80-81 Signal on tripping of stages U> and U< (SIGNAL 1)
77-78 Signal on tripping of stage U<, starting of stages U> and U< (START 1)
70-71-72 Self-supervision (IRF) alarm output. Under normal conditions the contact interval
70-72 is closed. When the auxiliary voltage disappears or an internal fault is detected,
the contact interval 71-72 closes.
Protective earth terminal
Made in Finland
13
14
15
16
17
18
19
20
21
70
71
72
61
62
65
66
68
69
80
81
77
78
10
11
TTL
B470701
Rx
Tx
The combined overvoltage and undervoltage
relay SPAU 130 C is connected to the optical
fibre communication bus by means of the bus
connection module SPA-ZC 17 or SPA-ZC 21.
The bus connection module is connected to the
D-type connector (SERIAL PORT) on the rear
panel of the relay. The opto-connectors of the
optical fibres are plugged into the counter con-
nectors Rx and Tx of the bus connection mod-
ule. The selector switches of the bus connection
module, by means of which the communication
mode is selected, are to be set in position "SPA".

6
The trip signals of the U> stage is firmly wired
to output relay A and the trip signal of the U<
stage to output relay B. In addition, the follow-
ing functions can be selected with the switches
of the SGR switchgroup on the front panel of
the relay:
Configuration of
output relays
Switch Function Factory User's
default settings
SGR/1 Routes the external blocking signal to stage U< 1
SGR/2 Routes the start signal of the U< stage to output relay D 1
SGR/3 Routes the start signal of the U> stage to output relay D 1
SGR/4 Routes the trip signal of the U< stage to output relay D 1
SGR/5 Routes the trip signal of the U< stage to output relay C 1
SGR/6 Routes the trip signal of the U< stage to output relay A 1
SGR/7 Routes the trip signals of the U> stage to output relay C 1
SGR/8 Routes the trip signals of the U> stage to output relay B 1
Circuit breakers can be controlled directly with
output relay A and B. This enables two circuit
breakers to be controlled at the same time or
separate trip output relays can be configured for
the overvoltage protection and the undervoltage
protection.

7
2. The yellow LED indicators (U12, U23 and
U31) on the upper black part of the front plate
indicate, when lit, that the corresponding
voltage value is currently being displayed.
3. The red IRF indicator of the self-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. The green Uaux LED on the front panel is lit
whenthepower supplymoduleoperates prop-
erly.
5. The LED indicator below a particular setting
knob indicates, when lit, that the setting
value of the knob is currently being dis-
played.
6. The LED of the SG1 switchgroup indicates,
when lit, that the checksum of the switch-
group is currently being displayed.
The start and operation indicators, the function
of the SG2 software switchgroup and the func-
tions of the LED indicators during setting are
described more detailed in the user's manual
"Combined overvoltage and undervoltage relay
module SPCU 3C14".
Start and
operation
indicators 12
IRF
>
U
23
U
31
U
U
1315
[ ]
s
k>
t
0.5
0.05 1.0
0.8
0.4
5.0
1.0 12
0.8
1.2
1.6
STEP
RESET
SG1
01
1
2
3
4
5
6
7
8
<
U
n
U
>
U
<
t
[ ]
s
>
U
<
U
SPCU 3C14
n
U
<
U
1.2
STEP
RS 422 Ser.No.
SPAU 130 C
2
5
1308
f
n= 50Hz
60Hz
1
2
3
4
5
6
7
8/
>
tt
n
)(
>
n
)(
<
<
/
tt
%
[]
%
[]
U
aux
80...265V ~
–
18...80V –
SPCU 3C14
REGISTERS
0000
1
2
3
4
5
6
7
8
01
SGR
n
/
UU
U
U
n
U
=100V 110V
>
n
/
UU
max
n
/
UU
<
n
/
UU
min
1. The relay module is provided with two opera-
tion indicator located in the right bottom
corner of the front plate of the relay module.
One indicates operation of the overvoltage
stage and the other operation of the under-
voltage stage. Yellow light indicates that the
concerned stage has started and red light that
the stage has operated (tripped).
With the SG2 software switchgroup the start
and trip indicators can be given a latching
function, which means that the LEDs remain
lit, although the signal that caused operation
returns to normal. 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) is located behind the system front panel of
the protection relay and can be withdrawn after
removal of the system front panel. The power
supply and I/O module incorporates a power
unit, four output relays, the control circuits of
the output relays and the electronic circuitry of
the external control input.
The power unit is transformer connected, that
is, the primary side and the secondary circuits
are galvanically isolated. The primary side 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
in two versions which have different input volt-
age ranges:
- type SPTU 240S1 Uaux = 80...265 V ac/dc
- type SPTU 48S1 Uaux = 18...80 V dc
The voltage range of the power supply and I/O
module inserted in the relay is marked on the
system front panel of the relay.

8
Technical data Energizing inputs 100 V 110 V
Terminals 13-14, 16-17, 19-20 13-15, 16-18, 19-21
Rated voltage Un100 V 110 V
Continuous voltage withstand 2 x Un2 x Un
Power consuption at Un<0.5 VA
Rated frequency fn acc. to order 50 Hz or 60 Hz
Output contact ratings
Trip contacts
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 (blocking)
Terminals 10-11
Control voltage 18…265 V dc or
80…265 V ac
Current consumption when active 2…20 mA
Auxiliary supply voltage
Power supply and I/O modules and voltage ranges:
- type SPTU 240 S1 80...265 V ac/dc
- type SPTU 48 S1 18...80 V dc
Power consumption under quiescent/operating
conditions ~4 W/~6 W

9
Combined overvoltage and undervoltage relay module SPCU 3C14
- see "Technical data" in the manual for the module.
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
≅
SERIAL
PORT
SGR/1
U2
U3
U3 1111
DCBA
+-
Uaux
E
+
-(~)
(~)
L1
L2
L3
A
N
da
dn
SGR
100V
110V
19 20 21 10 11 61 62 70 71 72 77 78 80 81 68 69
75324 68
SPAU 130 C
_
SPA-ZC_
Rx Tx
START1 SIGNAL1 TRIP2 TRIP1IRF
100V 110V
16 1718
100V 110V
1314 15
IRF
3U< TS2
TS1
SGB/5
SS1
SS2
U1 I/O
t<
t>,k>
3U>
BS -
0
I
0
I
-
-
+
+
+
+
65 66
0
I
0
I
-
-
+
+
+
Examples of
application
Example 1.
Network overvoltage
and undervoltage
supervision
Fig. 4. Substation overvoltage and undervoltage protection with voltage relay SPAU 130 C. The
selector switch positions are shown in the table on the following page.
The overvoltage and undervoltage relay module
SPCU 3C14 measures the phase-to-phase
voltages.
Many components of the power system are
sensitive to overvoltage. Inverse time character-
istic of the overvoltage relay is recommended as
the liability to damage of the power system
components often is a function of the duration
of the overvoltage. At inverse time characteristic
the relay provides an alarm signal at when the set
start voltage has been exceeded. If the voltage
exceeds 1.06 times the set start voltage the relay
operates, the faster the greater the voltage is.
Thus the overvoltage stage provides an alarm
signal when the overvoltage arises and trips the
circuit breaker, if the voltage continues to rise.
When the characteristic curve A is selected the
alarm level can be set low enough and still the
voltage regulator is granted time enough to
operate even during severe voltage fluctuations.
The undervoltage stage also trips the circuit
breaker. An unwanted operation of the under-
voltage stage during an autoreclose cycle can be
inhibited with switch SG1/6. If switch SG1/6 = 1
the operation of the undervoltage stage is inhib-
ited, when the voltage falls below 20% x Un.

11
An unwanted operation of the undervoltage
stage when the miniature circuit breaker trips
has been inhibited by routing a control voltage
from the auxiliary contact of the MCB to the
relay's control input 10-11. Switch SGB/5 on
the printed circuit board must be in position 1
as also switch SGR/1.
The selector switches of the voltage relay SPAU
130 C can be set as follows:
Switch SG1/SPCU 3C14 SGB/SPCU 3C14 SGR
1 0 three-phase 0 not in use 1 control signal from minia-
ture circuit breaker (MCB)
2 1 U> start time = 30 s 0 not in use 1 start signal of stage U< to
output relay D
3 1 U> inverse charact. 0 not in use 1 start signal of stage U> to
output relay D
4 0 0 not in use 0 no trip signal of stage U< to
curve A output relay D
5 0 1 blocking of stage t< 1 trip signal of stage U< to
output relay C
6 1 U< stage blocked, 0 not in use 0 no trip signal of stage U< to
if U < 20% x Unoutput relay A
7 1 U< start time = 30 s 0 not in use 1 trip signal of stage U> to
output relay C
8 1 t< = 10...120 s 0 not in use 0 no trip signal of stage U> to
output relay B
Σ230
When the switches are set as above, the output
relays of the voltage relay SPAU 130 C provide
the following signals:
Contact Function
65-66 Tripping of the circuit breaker on the high-voltage side of the transformer (U>)
68-69 Tripping of the circuit breaker on the low-voltage side of the transformer (U<)
80-81 Signal on tripping (U> and U<)
77-78 Starting (U> and U<)
70-71-72 Self-supervision
A prewarning of a voltage disturbance is ob-
tained over the contact interval 77-78 and a
signal on tripping of stage U> or U< is obtained
over the contact interval 80-81. When the over-
voltage stage or the undervoltage stage starts or
operates the start indicator (yellow) or operation
indicator (red) of the concerned stage is lit. If the
indicators are selfreset they are switched off
when the measured voltage returns. If the indi-
cators are latching they have to be reset manually
with the reset push-button on the front panel or
by remote control via the serial port.

12
≅
SERIAL
PORT
SGR/1
U2
U3
U3 1111
DCBA
+-
Uaux
E
+
-
(~)
(~)
A
N
da
dn
SGR
100V
110V
19 20 21 10 11 61 62 70 71 72 77 78 80 81 68 69 65 66
75324 68
SPAU 130 C
_
START1 SIGNAL1 TRIP2 TRIP1IRF
100V 110V
16 1718
100V 110V
1314 15
IRF
3U< TS2
TS1
SGB/5
SS1
SS2
U1
I/O
t<
t>,k>
3U>
BS
-
+
M
MOTOR
FEEDER
CB TRIP
MAIN CB TRIP
Fig. 5. Motor feeder undervoltage protection with relay SPAU 130 C. The selector switch positions
are shown in the table on the following page.
The undervoltage stage of the relay trips the
circuit breakers of the motor feeders connected
to the busbar. In this way the motors are pre-
vented from restarting at the same time on
recovery of the voltage. The operate time setting
of the undervoltage stage is to be longer than the
dead time of the high-speed auto-reclose cycle of
the transmission network. This prevents motors
from tripping during short voltage interrup-
tions.
An unwanted operation of the undervoltage
stage when the miniature circuit breaker (MCB)
trips has been inhibited by routing a control
voltage from the auxiliary contact of the MCB
to the control input 10-11 of the relay. Switch
SGB/5 on the printed circuit board of the volt-
age relay module should be in position 1 as
should also switch SGR/1.
Example 2.
Motor undervoltage
protection

13
The overvoltage stage protects the motors and
transformers connected to the busbars. The
overvoltage stage can be given inverse time
characteristic. When the characteristic curve B
is selected the start voltage can be set relatively
high without rendering to long an operate time
at severe overvoltage.
The overvoltage stage and the undervoltage
stage are both used for tripping. The trip signal
of the undervoltage stage is routed to the circuit
breakers of the motor feeders. The overvoltage
stage operates the main circuit breaker.
The selector switches of the voltage relay SPAU
130 C can be set as follows:
Switch SG1/SPCU 3C14 SGB/SPCU 3C14 SGR
1 0 three-phase 0 not in use 1 control signal from minia-
ture circuit breaker (MCB)
2 1 U> start time = 30 s 0 not in use 0 no start signal of stage U<
to output relay D
3 1 U> inverse charact. 0 not in use 0 no start signal of stage U>
to output relay D
4 1 0 not in use 1 trip signal of stage U< to
curve B output relay D
5 0 1 blocking of stage t< 0 no trip signal of stage U<
to output relay C
6 0 U< stage blocked, 0 not in use 0 no trip signal of stage U<
if U < 20% x Unto output relay A
7 0 U< start time = 0.1 s 0 not in use 1 trip signal of stage U> to
output relay C
8 0 t< = 10...12 s 0 not in use 0 no trip signal of stage U> to
output relay B
Σ14
When the switches are set as above, the output
relays of the voltage relay SPAU 130 C provide
the following signals:
Contact Function
65-66 Tripping of the main circuit breaker (U>)
68-69 Tripping of the circuit breakers of the motor feeders (U<)
80-81 Signal on tripping of the main circuit breaker (U>)
77-78 Signal on tripping of the circuit breakers of the motor feeders (U<)
70-71-72 Self-supervision signal

14
Example 3.
Generator pole
short-circuit
protection
Fig. 6. Generator pole short-circuit protection with relays SPAU 130 C and SPAJ 131 C. The
selector switch positions are shown in the table on the following page.
≅
SGR/1
U2
U3
U3 1111
DCBA
+-
Uaux
E
+
-
(~) (~)
SGR
100V
110V
1920 21 10 11 61 62 70 71 72 80 81 68 69 65 66
75324 68
SPAU 130 C
_
SIGNAL1 TRIP2 TRIP1
BS IRF
100V
110V
16 1718
100V
110V
1314 15
IRF
3U< TS2
TS1
SGB/5
SS1 SS2
U1
I/O
t<
t>,k>
3U>
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>>
L1 L2 L3
KK
-
+
GK
+
EXCITATION CB TRIPAND PRIME MOVER SHUT DOWN
GENERATOR CB TRIP
PRIME MOVER SHUT DOWN
GENERATOR AND EXCITATION CB TRIP
START1
7877

15
When a pole short-circuit occurs on a generator
provided with a static excitation system the
generator voltage and the excitation rapidly
decrease so much, that the short-circuit current
falls below the set start current of the overcur-
rent relay.
By capturing the start signal of the overcurrent
relay with a drop-off delayed auxiliary relay,
which controls the external blocking input of
the undervoltage relay, the protection arrange-
ment can be made to operate, even though the
overcurrent relay resets without tripping. The
undervoltage stage is normally blocked and it is
deblocked by the starting signal of the low-set
stage of the overcurrent relay. The undervoltage
stage trips the circuit breaker after the set oper-
ate time t<.
When required, the undervoltage stage can be
blocked when the miniature circuit breaker of
the energizing voltage circuit operates.
The start signal of the undervoltage stage can be
used for preventing the generator from being
connected to the network during undervoltage
or for alarming on undervoltage.
The selector switches of the voltage relay SPAU
130 C can be set as follows:
Switch SG1/SPCU 3C14 SGB/SPCU 3C14 SGR
1 0 three-phase 0 not in use 1 blocking signal from the
drop-off delayed relay
2 1 U> start time = 30 s 0 not in use 1 start signal of stage U<
to output relay D
3 1 U> inverse charact. 0 not in use 0 no start signal of stage U>
to output relay D
4 1 0 not in use 0 no trip signal of stage U<
curve B to output relay D
5 0 1 blocking of stage t< 1 trip signal of stage U<
to output relay C
6 0 U< no block., when 0 not in use 1 trip signal of stage U<
U < 20% x Unto output relay A
7 0 U< start time = 0.1 s 0 not in use 1 trip signal of stage U>
to output relay C
8 0 t< = 1…12 s 0 not in use 0 no trip signal of stage U>
to output relay B
Σ14
When the switches are set as above, the output
relays of the voltage relay SPAU 130 C provide
the following signals:
Switch Function
65-66 Tripping of the generator circuit breaker and the excitation circuit breaker on
pole short circuit (stages U< and I>) or on overvoltage (stage U>)
68-69 Prime mover shut down on pole short circuit (stages U< and I>)
80-81 Signal on operation of the overvoltage stage or pole short circuit protection
77-78 Start signal of the undervoltage stage U<
70-71-72 Self-supervision signal
The output contacts of the relay SPAJ 131 C can
be given the following functions:
Switch Function
65-66 Tri'of generator circuit breaker, stages I> and I>>
68-69 Tripping of excitation circuit breaker and shut down, stage I>>
80-81 Signal on operation of stage I> and I>>
77-78 Start signal from stage I> to the drop-off delayed auxiliary relay
70-71-72 Self-supervision alarm signal

16
The registers of the overvoltage and under-
voltage relay contain useful information about
the behaviour of the power network during
normal service and in a fault situation.
On starting of the overvoltage stage the maxi-
mum value of the measured voltages is recorded
in register 1 as a multiple of the rated voltage.
Any new starting of the overvoltage stage erases
the old value from the register and a new value
is recorded. On operation of the overvoltage
stage the value gathering sequence is stopped
and the highest measured value during the start-
ing period is recorded.
Register 2 contains the maximum value of the
voltages measured after a relay reset as a multiple
of the rated voltage. The registered value is
updated any time when the value of the meas-
ured voltage exceeds the registered voltage value.
Register 2 must be erased by a command given
via the serial bus or by pressing the STEP and
RESET push-buttons simultaneously.
On starting of the undervoltage stage the mini-
mum value of the measured voltages is recorded
in register 3 as a multiple of the rated voltage.
Any new starting of the undervoltage stage
erases the old value from the register and a new
value is recorded. On operation of the under-
voltage stage the value gathering sequence is
stopped and the lowest measured value during
the starting period is recorded.
Register 4 contains the minimum value of the
voltages measured after a relay reset as a multiple
of the rated voltage. The registered value is
updated any time when the value of the meas-
ured voltage falls below the registered voltage
value. Register 4 must be erased by a command
given via the serial bus or by pressing the STEP
and RESET push-buttons simultaneously.
The number of startings, register 5 and 6, pro-
vides information on the occurance of
overvoltage and undervoltage in the network. It
must, however, be noted that when the start
time setting is 0.1 s, for instance, starting motors
can cause the undervoltage stage to start and the
value of register 6 to be updated. In the same
way the overvoltage stage may start on tempo-
rary overvoltages caused by, for instance, by a
voltage regulator.
Registers 7 and 8 show the duration of the latest
start situation of the stages, expressed in per cent
of the set operate time or of the calculated
operate time for the overvoltage stage. Any new
start erases the old value and a new value is
recorded. If the stage operates, the register value
will be 100.
The values of register 7 and 8 provide informa-
tion about the duration of the voltage variations
and how close to operation the overvoltage and
undervoltage stages have been. Furter informa-
tion is obtained about the function of the volt-
age regulator.
Register 2 and 4 provide information about the
limits of of fluctuation of the busbar voltage
during normal service.
Registers 1 and 3 as well as 7 and 8 facilitate the
post-fault analysis. These registers provide in-
formation about the voltage levels in a network
disturbance situation and how close to opera-
tion the overvoltage and undervoltage stages
have been.
Recorded data and
fault analysis

17
Secondary
injection testing
Relay testing, both primary and secondary,
should always be performed in accordance with
national regulations and instructions.
The protection relay incorporates an IRF func-
tion that continuously monitors the internal
state of the relay and produces an alarm signal on
detection of a fault. According to the manufac-
turer’s recommendations the relay should be
submitted to secondary testing at five years’
intervals. These tests should include the entire
protection chain from the instrument trans-
formers to the circuit breakers.
The secondary testing described in this manual
is based on the relay’s setting values during
normal operation. If necessary, the secondary
testing can be extended by testing the protection
stages throughout their setting ranges.
As switch positions and setting values have to be
altered during the test procedure the correct
positions of switches and the setting values of
the relay during normal operation conditions
have to be recorded, for instance, on the refer-
ence card accompanying the relay.
For secondary testing the relay must be dis-
connected from the voltage transformer circuits
and other secondary circuits by means of
disconnectable terminal blocks or a test adapter
fitted on the relay. A possible connection of the
relay to the circuit breaker trip coil must be
noted during the test.
When the auxiliary voltage is connected to the
relay, a self-testing program is carried out auto-
matically. The self-testing program includes the
whole relay except for the matching transform-
ers and the contacts of the output relays. The
operational condition of the relay is tested using
ordinary relay test equipment. The secondary
injection test also includes the matching trans-
formers, the output relays and the accuracy of
the operate values.
When no relay test set is available the secondary
injection test can be carried out with the follow-
ing equipment:
- regulating transformer
- isolating transformer, e.g. 220 V/220 V
- voltmeter
- stop watch or counter for time measurement
- dc voltage source
- switches and indicator lamps
- supply and pilot wires
- calibrated multimeter
Note the relay's rated voltage when measuring
wires are connected to the terminals of the relay,
see chapter Technical data, passage Energizing
inputs.

18
≅
SGR/1
U2
U3
U3 1111
DCBA
+-
E
SGR
100V
110V
19 20 21 10 11 61 62 70 71 72 77 78 80 81 68 69 65 66
7532 468
SPAU 130 C
_
START1 SIGNAL1 TRIP2 TRIP1
IRF
100V
110V
16 1718
100V
110V
13 14 15
IRF
3U< TS2
TS1
SGB/5
SS1
SS2
U1 I/O
t<
t>,k>
3U>
TIMER START
S1
+(~)
-(~)
TIMER STOP
S2
L2 L3
L1
UauxBS
V
N
L1
Fig. 7. Test circuit for the overvoltage and undervoltage relay SPAU 130 C.
When the test circuit has been completed and
the selector switches properly set, the auxiliary
voltage can be connected to the relay. The
function of the test circuit can be verified by
means of a multimeter.

19
Checking the matching transformers
The three matching transformers of the relay are
checked one by one. Apply voltage to the relay
and compare the voltage value read from the
display of the relay with the voltage value shown
by the voltmeter. The measurements can be
performed at the rated voltage of the relay.
Checking the overvoltage stage U>
Set the switches of the SGR switchgroup as
follows before starting the test:
Switch Position
11
20
31
40
50
60
71
80
The following relay functions are obtained:
Output relay Function
(terminals)
A (65-66) Trip signal of stage U>
B (68-69) (Trip signal of stage U<)
C (80-81) Signal on operation of
stage U>
D (77-78) Start signal of stage U>
E (70-71-72) Self-supervision signal
Checking the start function
Apply test voltage to terminals 13-14 or 13-15
depending on the used energizing input. Close
switch S1 and increase the voltage slowly until
the overvoltage stage starts and indicator L2 is
lit. Read the start voltage value from the voltme-
ter.
Operate time t>
Definite time characteristic
If possible, set the test voltage at 2 x the set start
voltage of the overvoltage stage. Note! The
maximum voltage withstand of 2 x Unmust not
be exceeded. The timer is started by switch S1,
when it is closed and stopped by contact 65-66,
when output relay A picks up.
The operation of output relay C is indicated
with indicator L3, when it is lit.
When the relay starts the LED indicator U> in
the lower right corner of the front panel is lit
with yellow colour. When the overvoltage stage
operates the LED indicator turns red.
Inverse time characteristic
When the relay has been set for inverse time
characteristic, the test is performed by mea-
suring the operate time at two voltage values,
e.g. 1.1 x U> and 1.4 x U> and by comparing the
operate times with the operate times obtained
from the characteristic curves.

20
Checking the undervoltage stage U<
Set the switches of the SGR switchgroup as
follows before starting the test:
Switch Position
11
21
30
40
51
60
70
80
The following relay functions are obtained:
Output relay Function
(terminals)
A (65-66) (Trip signal of stage U>)
B (68-69) Trip signal of stage U<
C (80-81) Signal on operation of
stage U<
D (77-78) Start signal of stage U<
E (70-71-72) Self-supervision signal
Further, switch SG1/1 is set in position 1, which
makes the relay a single phase relay.
Checking the start function
Set the test voltage at a value slightly above the
set start voltage U< of the undervoltage stage.
Close switch S1 and lower the voltage slowly
until the undervoltage stage starts and indicator
L2 is lit. Read the start voltage value from the
voltmeter.
Operate time t<
Definite time characteristic
Set the test voltage at 0.5 times the set start
voltage of the undervoltage stage. The timer is
started by switch S1, when it is closed and
stopped by contact 68-69, when output relay B
picks up.
Note!
If the test voltage setting is below 0,2 x Un,
switch SG1/6 must be set in position 0.
Checking the blocking function
Set switch SGB/5 of the relay module in posi-
tion 1 (ON) and switch SGR/1 in position 1.
Check the blocking function by applying a
control voltage (voltage value within the same
range as the auxiliary voltage) via switch S2 to
the control input 10-11. Set the test voltage at 2
times the set start voltage of the undervoltage
stage. Lower the voltage until the undervoltage
stage starts and indicator L2 is lit but the under-
voltage stage is not permitted to operate.
Checking the output relay of the self-supervi-
sion system (IRF)
The self-supervision system and the function of
the IRF LED and the output relay E can be
tested in the Trip test mode described in manual
"General characteristics of C type relay mo-
dules". The operation of output relay E is indi-
cated by L1.