ABB SPAS 348 C Parts list manual

SGR
SGB
SGF
SPCS 4D11
TRIP
PROGRAM
RESET
STEP
L1 12
IRF
2>
I
23
U
L3
I
I
>n
II
[ ]
k>
t
n
>>
II
[ ]
s
>>
[ ]
t
s
[ ]
t
0122A
b
ϕ
n
II
[]
[ ]
s
>>>
>>>
U
Ser.No.
SPAS 348 C
0355A
aux
18...80 V –
80...265 V ~
–
U1 U2 U3
fn=
50Hz
60Hz
n
I
=1A 5A ( )
I
n
U
=( )
0
U 100V/110V/120V
n
I
=( )
0
I
1A0,2A
OPERATION INDICATORS
U
RS 431
2
5
n
U
100V ...120V ( )
U
0
SPCS 2D26
1
2
3
4
5
6
A
CBFP
U
0b
>
Start
U
0b
>
Trip
U
01
>
Start
/
I
01
>
Start
U
01
>
Trip
/
I
01
>
Trip
U
02
>
Start
/
I
02
>
Start
U
02
>
Trip
/
I
02
>
Trip
0
SPCS 4D12
CBFP
I
>
Start
1
2
3
4
5
6
7
9
I
>
Trip
>>
I
Start
>>
I
Trip
>>>
I
Start
>>>
I
Trip
I
>
Start
0
SPCS 4D11
CBFP
I
>
Start
1
2
3
4
5
6
7
9
I
>
Trip
>>
I
Start
>>
I
Trip
>>>
I
Start
>>>
I
Trip
I
>
Start
SGR
SGB
SGF
SPCS 2D26
TRIP
PROGRAM
RESET
STEP
IRF
I
o
I
o
U
ϕ
0037A
o
U
0b>
U
%
s
b>
[ ]
t
s
1>
[ ]
t
01 >
U
%
[ ]
01>
I
%
[ ]
02>
I
%
[ ]
s
2>
[ ]
t
02 >
U
%
[ ]
[ ]
SGR
SGB
SGF
SPCS 4D12
TRIP
PROGRAM
RESET
STEP
L1 31
IRF
2>
I
23
U
L2
I
I
>n
II
[ ]
k>
t
n
>>
II
[ ]
s
>>
[ ]
t
s
[ ]
t
0124B
b
ϕ
n
II
[]
[ ]
s
>>>
>>>
U
B
ABB Automation
SPAS 348 C
Feeder Protection Relay
User´s manual and Technical description

2ABB Automation
SPAS 348 C
Feeder Protection
Relay
Contents Features .......................................................................................................................... 3
Application .....................................................................................................................3
Description of operation ................................................................................................. 4
Connections ................................................................................................................... 6
Specification of input and output terminals.................................................................... 7
Signal flow diagram (modified 96-11) ............................................................................. 8
Operation indicators ....................................................................................................... 9
I/O module .................................................................................................................... 9
Power supply module ................................................................................................... 10
Technical data .............................................................................................................. 10
Application examples (modified 96-11) ......................................................................... 13
Testing .........................................................................................................................22
Maintenance and repair ................................................................................................ 24
Spare parts .................................................................................................................... 24
Delivery alternatives ..................................................................................................... 24
Order numbers ............................................................................................................. 25
Order data .................................................................................................................... 25
Dimension drawings and mounting.............................................................................. 26
In addition to this general part the following descriptions of the individual modules
are included in the complete manual of the feeder terminal relay SPAS 348 C:
Directional overcurrent relay modules SPCS 4D11 and SPCS 4D12 1MRS 750115-MUM EN
Directional or non-directional earth-fault relay module SPCS 2D26 1MRS 750100-MUM EN
General characteristics of D-type SPC relay modules 1MRS 750066-MUM EN
1MRS 750114-MUM EN
Issued 96-04-11
Modified 96-11-26
Version B
Checked TK
Approved TK
Data subject to change without notice

3ABB Automation
Features Three-phase overcurrent protection with two
directional stages and one non-directional high-
set stage
Special memory circuit for maintaining the sta-
bility and reliability of directional measurement
at close three-phase faults
Two-stage directional earth-fault protection or
alternatively three stage-residual voltage protec-
tion
Five external control inputs enabling, for exam-
ple, switching between main and second set-
tings
Eight freely configurable output relays and out-
put relay for internal relay fault
Fourheavy-dutyoutputrelaysfor circuit-breaker
tripping
Recording of measured data to be used for
analyzing network condition
Transfer of data over serial communication bus
Continuous self-supervision and internal fault
diagnosis
Reading and writing of setting values via display
and front panel push-buttons, a PC with setting
software or from higher systems levels over serial
bus
Application The feeder protection relay SPAS 348 C is
designed to be used in applications requiring
directional phase overcurrent, directional short-
circuit and directional earth-fault protection.
Typically, the relay is used for the overcurrent
and earth-fault protection of infeeders and
busbars in distribution substations provided
with multiple infeeders supplied from the same
high-voltage busbar system via power trans-
formers.
The relays are also applied for the selective short-
circuit and earth-fault protection of parallel
feeders between substations and for feeder pro-
tection in ring-type and meshed distribution
networks.
Further, the directional relay is used for the
protection of radial feeders with a small back-
feed of energy from a generator in the consumer-
end of the feeder.

4ABB Automation
Description of opera-
tion
The feeder protection relay SPAS 348 C is a
secondary relay system to be connected to the
current and voltage transformers of the network
section to be protected.
The feeder protection relay includes three pro-
tection relay modules:
two directional overcurrent relay modules SPCS
4D11 and SPCS 4D12, and one directional
earth-fault relay module type SPCS 2D26.
Directional over-
current relay mod-
ules SPCS 4D11 and
SPCS 4D12
The directional overcurrent modules SPCS
4D11 and SPCS 4D12 are intended to be used
for single-phase or two-phase directional over-
current protection. When the two directional
overcurrent modules are used together three-
phase directional overcurrent protection is
achieved.
Each module includes three overcurrent stages:
two directional stages I>, I>> and one non-
directional stage I>>>. An overcurrent stage
starts, as soon as the current on one of the phases
exceeds the setting value of the stage and, if
directional operation is selected the directional
criteria must be fulfilled. Should the stage still be
started when the operate time selected for the
stage elapses, it trips the circuit breaker by
delivering the trip signal configured.
The low-set stages I> may have a definite time or
an inverse time characteristic, whereas the high-
set stages operate according to the definite time
characteristic only. The operation of the stages
can be totally blocked by means of the configu-
ration switches.
The directional control of the relay modules is
based on measuring the phase angle between the
phase current and the opposite phase-to-phase
voltage, say, L1 and U23.
To secure a reliable relay operation at close
three-phase faults characterized by an exremely
low phase-to-phase voltage, a memory function
is implemented. At sudden loss of voltage in a
fault situation this memory function gives the
directional stage an additional 2.5 s time to
operate after a total loss of voltage (=voltage level
below 7%).
Further, if the circuit breaker is closed against a
fault, which means that the voltage does not rise
to such a level that the direction of the current
can be determined, the high-set stage I>> will
operate non-directionally.
Directional earth-
fault relay module
SPCS 2D26
The directional earth-fault relay module SPCS
2D26 has two protection stages: a low-set stage
I01> and a high-set stage I02>. The start value of
the deblocking voltage U0b> is the same for both
I01> and I02>. The protection is based on
measuring the neutral current I0, the residual
voltage U0and the phase angle between these.
An earth-fault stage starts, if the neutral current
and the residual voltage exceed the set values and
the phase angle is within the specified operating
sector ϕb±∆ϕ. When these conditions remain
fulfilled during the set operate time, the stage
provides a trip signal.
The earth-fault relay module SPCS 2D26 can
also be configured to operate as a three-stage
residual voltage relay by replacing the two neu-
tral current stages by two voltage stages. The
three residual voltage stages measure the same
voltage, but they can be given separate start
values and operate times.
Circuit-breaker
failure protection
The circuit-breaker failure protection integrated
into the relay modules SPCS 4D11, SPCS 4D12
andSPCS2D26enablesasecuredcircuitbreaker
trip system. The breaker fail function is linked
to the output relay TS1, which means that if the
local circuit breaker fails to trip, the trip signal is
rerouted directly to the upstream circuit breaker.
Note ! When the relay SPAS 348 C is wired according
to a connection diagram of this user guide, the
operation direction "forward" is the direction of
the normal load current. If the relay is to trip
when the current starts flowing in the opposite
direction to the normal load current, the opera-
tion direction "reverse" shall be selected by
means of the SGF switches.

5ABB Automation
Connections
Fig. 1. Connection diagram for feeder protection relay SPAS 348 C
SPAS 348 C
1 A
5 A
1 A
5 A
L1
L2
L3
S1
S2
P1
P2
A
N
da
dn
U1
(SPCS4D11)
BS1
BS2
5 A
BS1/
U1
1 A
5 A
U4
I
O
Uo
IL3
IL2
IL1
U23
U12
Uaux
+ (~)
- (~)
2I>
RRES
+
-
13
14
16
17
1
2
3
4
5
6
7
8
9
28
29
25
26
27
10
9
8
7
6
5
4
3
2
1
62
61
X0
X1
X0
63
IRF
IRF
+
+
+
+
+
TS1
SS1
SS2
SS3
TS2
I/O
U2
(SPCS2D26)
BS1
BS2
U0
I
RRES
I/O
0
-
I
I
0
+
-
SS1
TS1
SS2
TS2
SS3
TS3
SS4
TS4
+
+
+
+
+
SPA-ZC_
Rx
Tx
SERIAL
PORT
(SPA)
14
15
16
12
13
3
4
9
10
11
1
2
7
8
15
16
5
6
11
12
13
14
X1
X2
X1
X2
X2
X2
X2
X2
X2
100/
110/
120 V
U5
~
1 A
a
n
U31
19
20
BS1/
U2
BS1/
U3
BS2
RRES
BS1
BS2
2I>
RRES
IRF
TS1
SS1
SS2
SS3
TS2
I/O
U1
(SPCS4D12)
IRF SS1 TS1 SS2 TS2 SS3 TS3 SS4 TS4
+
S1
S2
P1
P2
Forward
100/
110/
120 V
100/
110/
120 V
100/
110/
120 V

6ABB Automation
Uaux Auxiliary voltage
TS1...TS4 Output relays (heavy-duty)
SS1...SS4 Output relays (alarms, blockings, etc.)
IRF Self-supervision output relay
BS1, BS2, RRES Control signals
U1 Directional overcurrent relay module SPCS 4D11
U2 Directional overcurrent relay module SPCS 4D12
U3 Directional earth-fault relay module SPCS 2D26
U4 I/O module
U5 Energizing input module
SERIAL PORT Serial communication port
SPA-ZC Bus connection module
Rx/Tx Fibre-optic cable connections
Made in Finland
= 63
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
X0
5
1
2
3
4
6
25
26
27
X2
X1
Serial Port
SPA
TS4BS1/U2 BS1/U3 BS2 RRES TS3BS1/U1
IRF SS1 SS2 SS3 SS4 TS1 TS2
7
8
9
14
61
62
63
13
16
28
29
17
19
20
I
L1
I
L2
I
L3
I
0
U
aux
U
12
U
23
U
31
U
0
Fig. 2. Terminals of feeder protection relay SPAS 348 C

7ABB Automation
Specification of
input and output
terminals
Terminal Terminal interval Function
group
XO 1—2 Phase current IL1 (5 A). Directional overcurrent protection
1—3 Phase current IL1 (1 A). Directional overcurrent protection
4—5 Phase current IL2 (5 A). Directional overcurrent protection
4—6 Phase current IL2 (1 A). Directional overcurrent protection
7—8 Phase current IL3 (5 A). Directional overcurrent protection
7—9 Phase current IL3 (1 A). Directional overcurrent protection
13—14 Phase-to-phase voltage U12 (100 V).
Directional overcurrent protection
16—17 Phase-to-phase voltage U23 (100 V).
Directional overcurrent protection
19—20 Phase-to-phase voltage U31 (100 V).
Directional overcurrent protection
25—26 Neutral current I0(5 A). Directional earth-fault protection.
(SPCS 2D26)
25—27 Neutral current I0(1 A). Directional earth-fault protection.
(SPCS 2D26)
28—29 Residual voltage U0(100 V). Earth-fault protection.
(Selection of rated voltage 110 V- and 120 V- possible)
61—62 Auxiliary voltage supply. The positive pole of the DC supply
is connected to terminal 61. Auxiliary voltage range marked
on the front plate.
63 Protective earth
X1 1—2 External control signal BS1/U1
3—4 External control signal BS1/U2
5—6 External control signal BS1/U3
7—8 External control signal BS2
9—10 External control signal RRES
11—12—13—14 Output relay TS4 (heavy-duty; terminals 12 and 13 must be
connected together if double-pole connection not used)
15—16 Output relay TS3 (heavy-duty)
X2 1—2 Output relay TS2 (heavy-duty)
3—4 Output relay TS1 (heavy-duty)
5—6 Output relay SS4
7—8 Output relay SS3
9—10—11 Output relay SS2
12—13 Output relay SS1
14—15—16 Output relay IRF
The protection relay connects to the fibre-optic
data bus via the D connector on the rear panel
and a bus connection module type SPA-ZC 17
or SPA-ZC 21. The optical fibres are connected
to the counter contacts Rx and Tx of the mod-
ule. The selector switches of the bus connection
module are set into the position "SPA".

8ABB Automation
Signal flow
diagram
(modified 96-11)
Fig. 4 illustrates the internal signals of the feeder
protection relay and their configuration. The
numbers given in the small squares refer to the
configuration switches for be used to connect-
ing the control signals to obtain the required
functions and thus configuring the start and trip
signals to operate as desired output signals.
Fig. 3. Internal signals of feeder protection relay SPAS 348 C
t
1
>
t
2
>
U
ob
>
I
o1
>
U
o1
>
I
o2
>
U
o2
>
&
&
I
o1
> /
U
o1
>
I
o2
> /
U
o2
>
SGF1/8
SGB1
1
2
3
SGB2
1
2
3
SGB3
1
2
3
t
b
>
ϕ
(U2)
SGB1
1
2
3
SGB2
1
2
3
SGB3
1
2
3
I>
I>>
t>>>
t>
t>>
I>>>
ϕ
ϕ
IL1, IL2 ,IL3
U12,U23,U31
Io
Uo
BS1/U1 BS1/U2 BS1/U3
BS2
RRES
SPCS 4D11
(U1)
SGB1
1
2
3
SGB2
1
2
3
SGB3
1
2
3
I>
I>>
t>>>
t>
t>>
I>>>
ϕ
ϕ
SGR3
SGR1
SGR4
SGR2
2
1
3
4
5
SGR6
SGR5
2
1
3
4
5
2
1
3
4
5
2
1
3
4
5
2
1
3
4
5
2
1
3
4
5
6
7
6
7
6
7
6
7
6
7
6
7
SPAS 348 C
SGR1
SGR2
1
1
5
SGR2
6
7
8
SGR2
2
5
6
SGR1
SGR2
SGR1
SGR2
3
4
8
7
4
SGR1
SGR2
4
8
7
SGF2
SGF2
SS1
13
12
X2
TS1
4
3
X2
11
10
X2
9
SGR1
SGR2
1
1
5
SGR2
6
7
8
SGR2
2
5
6
SGR1
SGR2
SGR1
SGR2
3
4
8
7
4
SGR1
SGR2
4
8
7
SGF2
SGF2
SS2
2
1
X2
SS3
TS3
SS4
6
5
X2
8
7
X2
16
15
X1
TS2
8
8
8
8
8
8
14
13
X1
12
11
TS4
1
SGR
Checksum
(1)
2
(2)
3
(4)
4
(8)
5
(16)
6
(32)
7
(64)
8
(128)
2
3
SPCS 4D12
(U3)
SPCS 2D26
TS1
SS1
SS2
TS2
SS3
TS3
SS4
TS4
TS1
SS1
SS2
TS2
SS3
2
3

9ABB Automation
Operation
indicators
2. Measured values, settings and start and trip
data are indicated on the display of the relay
modules. Starting and tripping are indicated
by the red operation code to the left of the
display. The operation codes are explained in
the manuals of the separate protection relay
modules and on the system panel of the
feeder protection relay.
The start indications can be programmed to
remain on even though the stage resets. Nor-
mally, the numbers indicating start are auto-
matically reset, whereas the trip codes have to
be reset by pressing the RESET push-button.
The TRIP indicator at the bottom part of the
front panel can be set to indicate starting and
tripping. The BS1, BS2 and RRES signals
can be configured to reset the trip indicators
automatically. An unreset operation indica-
tor does not affect the operation of the relay
module.
3. Measured values and settings presented on
the display are identified by yellow LEDs on
the front panel.
4. A permanent fault detected by the self-super-
vision system is indicated by the IRF indica-
tor of the concerned relay module. The fault
code appearing on the display when a fault
occurs should be recorded to facilitate main-
tenance and repair.
The operation indicators are described in detail
in the manuals of the individual relay modules.
Ser.No.
SPAS 348 C
0355A
aux
18...80 V –
80...265 V ~
–
U1 U2 U3
fn=
50Hz
60Hz
n
I
=1A 5A ( )
I
n
U
=( )
0
U 100V/110V/120V
n
I
=( )
0
I
1A0,2A
OPERATION INDICATORS
U
RS 431
2
5
n
U
100V ...120V ( )
U
0
SPCS 2D26
1
2
3
4
5
6
A
CBFP
U
0b
>
Start
U
0b
>
Trip
U
01
>
Start
/
I
01
>
Start
U
01
>
Trip
/
I
01
>
Trip
U
02
>
Start
/
I
02
>
Start
U
02
>
Trip
/
I
02
>
Trip
0
SPCS 4D12
CBFP
I
>
Start
1
2
3
4
5
6
7
9
I
>
Trip
>>
I
Start
>>
I
Trip
>>>
I
Start
>>>
I
Trip
I
>
Start
0
SPCS 4D11
CBFP
I
>
Start
1
2
3
4
5
6
7
9
I
>
Trip
>>
I
Start
>>
I
Trip
>>>
I
Start
>>>
I
Trip
I
>
Start
Fig. 4. Front panel of feeder protection relay
SPAS 348 C
1. The green LED Uaux on the system panel is lit
when the power supply unit is operating.
I/O module The I/O module of the feeder protection relay
SPAS 348 C is fitted in the rear part of the relay,
in the same direction as the mother PC board.
The module can be withdrawn after undoing
the fixing screws and disconnecting the protec-
tive earth conductor of the cover and the flat
cable connected to the mother PC board.
The I/O module incorporates the output relays
(8 pcs + IRF), the control circuits of the relays,
the electronic circuits for the five external con-
trol inputs and the D connector required for
serial communications. The input and output
signals of the I/O module are linked to the
mother board over a flat cable.
The output signals SS1...SS4, TS1...TS3 and
TS4 control an output relay with the same
designation. The operation of the stages are not
fixed to a particular output relay, but can be
programmed to the desired output relays. It
should, however, be noted that the output relays
TS1, TS2, TS3 and TS4 can be used for circuit
breaker control. The configuration of the
switchgroups is described in detail in the relay
module manuals.
The operation of the external control inputs is
determined by the setting of the configuration
switchgroups of the relay modules. The control
inputs can be used for blocking one or several
protection stages, for resetting latched output
relays, selecting second settings, etc.

10 ABB Automation
Power supply
module
The power supply module forms the voltages
required for the relay modules and the auxiliary
relay module. The power supply module is
located behind the system panel of the protec-
tion relay and can be withdrawn after removal of
the system panel.
The power supply module is available in two
versions as follows:
SPGU 240A1:
- rated voltage Un= 110/120/230/240 V ac
Un= 110/125/220 V dc
- operative range U = 80...265 V ac/dc
SPGU 48B2
- rated voltage Un= 24/48/60 V dc
- operative range U = 18...80 V dc
The voltage range of the power supply module
fitted into the relay is marked on the system
panel of the relay.
The power supply module is transformer-con-
nected, i.e. the primary side and the secondary
circuits are galvanically isolated. The primary
side is protected by a fuse, F1, located on the PC
board of the module. The fuse used in SPGU
240A1 is 1 A (slow) and that one used in SPGU
48B2 is 4 A (slow).
The green LED Uaux on the front panel is lit
when the power supply module is in operation.
The supervision of the voltages supplying the
electronic circuits is integrated into the relay
modules. A self-supervision alarm is received, if
a secondary voltage deviates from its rated value
by more than 25%.
Technical data Energizing inputs
Rated current In1 A 5 A
Terminal numbers X0/1-3 X0/1-2
X0/4-6 X0/4-5
X0/7-9 X0/7-8
X0/25-27 X0/25-26
Thermal current withstand
- continuously 4 A 20 A
- for 10 s 25 A 100 A
- for 1 s 100 A 500 A
Dynamic current withstand
- half-wave value 250 A 1250 A
Input impedance <100 mΩ<20 mΩ
Voltage inputs
Rated voltage Un100 V (110 V/120 V)
Terminal numbers X0/13-14, 16-17, 19-20, 28-29
Continuous voltage withstand 2 x Un
Rated burden of voltage input at Un<0.5 VA
Output contacts
Trip contacts
Terminal numbers X1/15-16, 11-12-13-14
X2/1-2, 3-4
- rated voltage 250 V ac/dc
- continuous current carrying capacity 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 control
circuit time constant L/R ≤40 ms at the
control voltage levels
- 220 V dc 1 A
- 110 V dc 3 A
- 48 V dc 5 A
Contact material AgCdO2

11ABB Automation
Signalling contacts
Terminal numbers X2/5-6, 7-8, 9-10-11
X2/12-13, 14-15-16
- rated voltage 250 V ac/dc
- continuous current carrying capacity 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 control
circuit time constant L/R ≤40 ms at the
control voltage levels
- 220 V dc 0.15 A
- 110 V dc 0.25 A
- 48 V dc 1 A
Contact material AgCdO2
External control inputs
Blocking/control (BS1/U1, U2, U3)
- terminal numbers X1/1-2, 3-4, 5-6
Blocking/control (BS2)
- terminal number X1/7-8
Blocking/control (RRES)
- terminal number X1/9-10
External control voltage
- operative range 18...250 V dc or
80...250 V ac
Current drain of activated control input 2...20 mA
Auxiliary power supply
Voltage ranges of power supply modules:
SPGU 240A1
- rated voltage Un= 110/120/230/240 V ac
Un= 110/125/220 V dc
- operative range U = 80...265 V ac/dc
SPGU 48B2
- rated voltage Un= 24/48/60 V dc
- operative range U = 18...80 V dc
Power consumption, under quiescent/
operation conditions 10 W/15 W
Combined overcurrent and earth-fault relay module SPCS 4D11, SPCS 4D12
- see "Technical data" in the manual for the module.
Directional earth-fault relay module SPCS 2D26
- see "Technical data" in the manual for the module.

12 ABB Automation
Data communication
Transmission mode Fibre-optic serial bus
Coding ASCII
Data transfer rate, selectable 4800 Bd or 9600 Bd
Electrical/optical bus connection module
powered from the host relay
- for plastic core cables SPA-ZC 21BB
- for glass fibre cables SPA-ZC 21 MM
Electrical/optical bus connection module
powered from the host relay or from an
external power source
- for plastic core cables SPA-ZC 17BB
- 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
EMC tests
CE-approved and tested according to EN 50081-2
EN 50082-2
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
Mechanical environmental test
Vibration test (IEC 255-21-1) class 2
Chock/bump test (IEC 255-21-2) class 2
Seismic test (IEC 255-21-3) class 2
Environmental conditions
Service temperature range -10...+55°C
Transport and storage temperature range
(IEC 68-2-8) -40...+70°C
Temperature influence 0.2%/°C
Damp heat test (IEC 68-2-30) 93...95%, +55°C, 6 cycles
Degree of protection by enclosure of
flush mounting relay case (IEC 529) IP 54
Weight of fully equipped relay 6 kg
*) The insulation and disturbance tests do not apply to the serial port, which is used for the bus
connection module only.

13ABB Automation
Application
examples
Example 1
Directional overcur-
rent protection of a
parallel feeder and
protection of the
busbar system
IRF
BS1/U1
BS2
SS1
SS2
SS3
TS1
TS2
SPAS 348 C
U4
I / O
IRF
SS1
SS2
SS3
SS4
TS1
TS2
TS3
I / O
U3 (SPCS 2D26)
U1 (SPCS 4D11)
2I>
U
I
0
RRES
BS1/U3
BS2
RRES
A
N
da dn
L1
L2
L3
+
-
U5
+
-(~)(~)
U
aux
X0/61
X0/62
~
X1/16
I / O
IRF X2/16
X2/15
X2/14
X2/12
X2/13
X2/8
X2/7
X2/11
X2/9
X2/10
X2/6
X2/5
X2/3
X2/4
X2/2
+
+
+
+
+
+
+
+
X1/14
X1/13
X1/12
X1/11
+
TS2
TS1
X1/15
TS3
SERIAL
PORT
X2/1
SS4
SS3
SS2
SS1
CBFP
X0/63
+
BS1/U1 BS1/U2 BS1/U3 BS2
RRES
X1/1 X1/2
X1/3
X1/4 X1/5 X1/6 X1/7 X1/8 X1/9
X1/10
+
OC alarm
EF alarm
Uo-deblock
CBFP
n
a
FORWARD
TS4
IRF
BS1/U2
BS2
SS1
SS2
SS3
TS1
TS2
I / O
U2 (SPCS 4D12)
2I>
RRES
TS4
U6
X0/28
X0/29
X0/25 X0/26
5 A 1 A
U
0
I
0
120/ 110/ 100 V
X0/27
X0/8
5 A 1 A
, I
L3
X0/4
X0/5
X0/6
5 A
I
L2
1 A
X0/9
X0/7
X0/19 X0/20
U
31
X0/16 X0/17
U
23
X0/1
X0/2
X0/3
5 A
I
L1
1 A
X0/13
X0/14
U
12
120/ 110/ 100 V 120/ 110/ 100 V 120/ 110/
100 V
I
L1
U
23
I
L3
, U
12
, I
L2
I
L1
U
23
, U
31
P1
P2
S1
S2
0
I
-
-
++
I0
Uo-alarm
EF trip
Fig. 5. Feeder protection relay SPAS 348 C used for protecting an infeeder cubicle

14 ABB Automation
Parallel feeders The block diagram on page 13 shows the relay
SPAA 348 C sited at the infeeder of a substation.
This connection can be be used for protecting
parallel feeders as shown in the Fig 6. When
parallel feeders are used, it is necessary to apply
directional relays at the receiving end, while
non-directional relays are sufficient at the feed-
ing end. Selectivity is then achieved by setting
the directional relays and their directional ele-
ments to look into the protected line, and giving
them time and current settings lower than those
of the non-directional relays in the feeding end.
Since the relay SPAS 348 C includes three
overcurrent stages and a versatile earth-fault
module, one relay can be used for the overcur-
rent and earth-fault protection of the busbar
system and for the protection of the parallel
feeders.
A possible DC component does not have to be
considered in the current setting, because due to
the peak-to-peak measurement method used,
asymmetry does not affect the sensitivity of the
start operations.
Fig. 6. Directional relays protecting parallell
feeders
SPAS
348 C SPAS 348 C
Directional overcur-
rent relay modules
SPCS 4D11 and
SPCS 4D12
The directional low-set stages I> are set to look
into the protected line. This means that the low
set-stages I> are set to operate in reverse direc-
tion by means of SGF switches. When definite
time function is used, the operate times of the
directional low-set stages I> should be at least
150 ms shorter than those of the non-direc-
tional stages of the relays in the feeding end . The
current settings of the directional stages looking
in reverse direction is normally 50% of the
normal full load of the protected circuit.
The directional high-set stages I>> are used for
the short-circuit protection of the busbar system
and, if required, the non-directional high-set
stage can be used as backup protection for the
outgoing feeders and the busbar system.
Definite time operation has been used in Exam-
ple 1, but inverse time characteristic can be
selected for the stage I> as well.
prevent unnecessary operation of the earth-fault
relays during a short circuit or when a motor is
started,thetrippingofthenon-directionalearth-
fault relays of the outgoing feeders are normally
blocked. If the outgoing feeders are provided
with directional earth-fault relays, no enable
signal is required.
The trip signal of the U0b> stage is used as alarm
signal for high resistivity earth faults (earth
faults not detected by any other protection
unit).
The residual voltage stages U01> and U02> are
used to protect the busbar system and serve as
non-selective back-up protection for the feeder
earth-fault protection. The stage U01> can be
used to open the bus section breaker or to
disconnect the feeder(s) most prone to faults.
Should a fault still persist after tripping of this
stage, the second stage U02> opens the infeeder
circuit breaker finally.
Directional or non-
directional earth-fault
relay module
SPCS 2D26
In the network illustrated in this example the
relay module SPCS 2D26 is used for the earth-
fault protection of the busbar system and as
backup earth-fault protection of the outgoing
feeders.
An earth-fault somewhere in a galvanically con-
nected power system causes residual voltage.
The residual overvoltage protection of the mod-
ule SPCS 2D26 measures the residual voltage
from the open delta winding of the voltage
transformers.
The low-set stage U0b> of the module indicates
beginning earth-faults. Normally the residual
voltage in a healthy isolated network is very
small, even less than 1% of the maximum re-
sidual voltage value. Thus the low-set residual
voltage stage can be given a low setting value.
The start signal of the low-set stage U0b> can be
used for enabling the non-directional earth-
fault current measuring relays of the feeders. To

15ABB Automation
In the case described in example 1 the switches
of the feeder protection relay SPAA 348 C can
be configured as follows:
Configuration of SPCS 4D11 and SPCS 4D12
Switch- Serial comm. Checksum Operation
group parameter
SGF1 S28 040 Definite time operation, CBFP in use, I>> directional
SGF2 S29 032 Automatic reset of start indicators, I>>> not in use
SGB1 S30 000 No blocking/control by the BS1 signal
SGB2 S31 000 No blocking/control by the BS2 signal
SGB3 S32 000 No blocking/control by the RRES signal
SGR1 S33 170 I> and I>> trip signal linked to output contact TS2
I> and I>> trip signal linked to output contact SS3
SGR2 S34 128 I>>> trip signal linked to output contact SS3
Configuration of SPCS 2D26
Switch- Serial comm. Checksum Operation
group parameter
SGF1 S49 128 Configured as a three-stage residual voltage module
SGF2 S50 000 Resetting time of stage U01> = 80 ms,
rated voltage of U0= 100 V
SGF3 S51 040 Signals TS2 and TS3 activate the TRIP LED
SGF4 S52 016 TS2 starts the circuit-breaker failure protection
SGF5 S53 000 No auto-reclosing
SGB1 S54 000 No blocking/control by the BS1 signal
SGB2 S55 000 No blocking/control by the BS2 signal
SGB3 S56 000 No blocking/control by the RRES signal
SGR1 S57 004 U0b> start signal linked to output contact SS2
SGR2 S58 001 U0b> trip signal linked to output contact SS1
SGR3 S59 000 U01> start signal not linked to output contacts
SGR4 S60 096 U01> trip signal linked to trip contact TS3 and SS4
SGR5 S61 000 U02> start signal not linked to output contacts
SGR6 S62 096 U02> trip signal linked to trip contacts TS2 and SS4

16 ABB Automation
(modified 96-11)
Fig. 7. Configuration of the internal signals of SPAS 348 C in application example 1
Note! The above configuration is not the factory default settings
t
1
>
t
2
>
U
ob
>
I
o1
>
U
o1
>
I
o2
>
U
o2
>
&
&
I
o1
> /
U
o1
>
I
o2
> /
U
o2
>
SGF1/8
SGB1
1
2
3
SGB2
1
2
3
SGB3
1
2
3
t
b
>
ϕ
(U2)
SGB1
1
2
3
SGB2
1
2
3
SGB3
1
2
3
I>
I>>
t>>>
t>
t>>
I>>>
ϕ
ϕ
IL1, IL2 ,IL3
U12,U23,U31
Io
Uo
BS1/U1 BS1/U2 BS1/U3
BS2
RRES
SPCS 4D11
(U1)
SGB1
1
2
3
SGB2
1
2
3
SGB3
1
2
3
I>
I>>
t>>>
t>
t>>
I>>>
ϕ
ϕ
SGR3
SGR1
SGR4
SGR2
2
1
3
4
5
SGR6
SGR5
2
1
3
4
5
2
1
3
4
5
2
1
3
4
5
2
1
3
4
5
2
1
3
4
5
6
7
6
7
6
7
6
7
6
7
6
7
SPAS 348 C
SGR1
SGR2
1
1
5
SGR2
6
7
8
SGR2
2
5
6
SGR1
SGR2
SGR1
SGR2
3
4
8
7
4
SGR1
SGR2
4
8
7
SGF2
SGF2
SS1
13
12
X2
TS1
4
3
X2
11
10
X2
9
SGR1
SGR2
1
1
5
SGR2
6
7
8
SGR2
2
5
6
SGR1
SGR2
SGR1
SGR2
3
4
8
7
4
SGR1
SGR2
4
8
7
SGF2
SGF2
SS2
2
1
X2
SS3
TS3
SS4
6
5
X2
8
7
X2
16
15
X1
TS2
8
8
8
8
8
8
14
13
X1
12
11
TS4
1
SGR
Checksum
(1)
2
(2)
3
(4)
4
(8)
5
(16)
6
(32)
7
(64)
8
(128)
2
3
SPCS 4D12
(U3)
SPCS 2D26
TS1
SS1
SS2
TS2
SS3
TS3
SS4
TS4
TS1
SS1
SS2
TS2
SS3
EF-alarm
OC-alarm
TRIP
CBFP
EF-trip
Uo-deblock
Uo-alarm
3

17ABB Automation
When the switches are set as shown on page 16
the output contacts of SPAS 348 C have the
following functions:
Contact Relay Function
X2/12-13 SS1 Earth fault detected only by the delayed alarm stage U0b>
X2/3-4 TS1 CPFP (= Circuit-Breaker Failure Protection)
X2/9-11 SS2 Blocking signal to the earth-fault current relays of the feeders
X2/1-2 TS2 Circuit breaker trip signal (infeeder circuit breaker)
X2/7-8 SS3 Alarm signal, overcurrent trip
X1/15-16 TS3 Trip signal U0b> for bus section breaker or feeders most prone to faults
X2/5-6 SS4 Alarm signal, earth-fault trip
X1/11-14 TS4 Not used

18 ABB Automation
Example 2
Directional overcur-
rent and earth-fault
protection of a
feeder, resonant
earthed system
0
IRF
BS1/U1
BS2
SS1
SS2
SS3
TS1
TS2
SPAS 348 C
U4
I / O
IRF
SS1
SS2
SS3
SS4
TS1
TS2
TS3
I / O
U3 (SPCS 2D26)
U1 (SPCS 4D11)
2I>
U
I
0
RRES
BS1/U3
BS2
RRES
A
N
da
dn
L1
L2
L3
+
-
U5
+
-(~)(~)
U
aux
X0/61
X0/62
~
X1/16
I / O
IRF X2/16
X2/15
X2/14
X2/12
X2/13
X2/8
X2/7
X2/11
X2/9
X2/10
X2/6
X2/5
X2/3
X2/4
X2/2
+
+
+
+
+
+
+
+
X1/14
X1/13
X1/12
X1/11
+
TS2
TS1
X1/15
TS3
SERIAL
PORT
X2/1
SS4
SS3
SS2
SS1
CBFP
BLOCK
X0/63
I
-
-
+
+
BS1/U1
BS1/U2 BS1/U3 BS2
RRES
X1/1 X1/2
X1/3
X1/4 X1/5 X1/6 X1/7 X1/8 X1/9
X1/10
+
I
+
+
OC alarm
EF alarm
CBFAIL
CBFP BLOCK
S1
S2
P1
P2
n
a
FORWARD
P1
P2
S1
S2
TS4
IRF
BS1/U2
BS2
SS1
SS2
SS3
TS1
TS2
I / O
U2 (SPCS 4D12)
2I>
RRES
TS4
U6
X0/28 X0/29
X0/25
X0/26
5 A 1 A
U
0
I
0
120/ 110/ 100 V
X0/27
X0/8
5 A 1 A
, I
L3
X0/4
X0/5
X0/6
5 A
I
L2
1 A
X0/9
X0/7
X0/19 X0/20
U
31
X0/16 X0/17
U
23
X0/1
X0/2
X0/3
5 A
I
L1
1 A
X0/13
X0/14
U
12
120/ 110/ 100 V 120/ 110/ 100 V 120/ 110/
100 V
I
L1
U
23
I
L3
, U
12
, I
L2
I
L1
U
23
, U
31
0
Fig. 8. Feeder protection relay SPAS 348 C used for protecting a feeder in a resonant earthed
network

19ABB Automation
Directional overcur-
rent relay module
SPCS 4D11 and
SPCS 4D12
The overcurrent relay modules SPCJ 4D11 and
SPCS 4D12 include three overcurrent stages.
By using all three stages and giving each overcur-
rent stage its own operate value and operate time
good selectivity with short operate times can be
obtained.
The operation of the short-circuit protection in
this example is based on blockings between the
protection levels. This means that when start-
ing, the I>> stage of the overcurrent relay mod-
ule of the feeder provides a blocking signal to the
I>> stage of the overcurrent relay module of the
infeeder. When no blocking signal is received,
the infeeder overcurrent relay module perceives
the fault as being within its own protection zone
and trips the circuit breaker. Thus it is possible
to use a minimum operate time of 120 ms at
busbar system faults.
The low-set stage I> is used as a directional stage
operating in "forward" direction. Definite time
operation has been used in this example, but
inverse time characteristic can also be selected
for this stage. The current setting of the stage I>
must extend to the setting of the following
protection stage.
The high-set stage I>> is also used as a direc-
tional stage that operates in the same direction
as the low-set stage. The current setting of this
stage has been selected so that the stage operates
at short circuits occurring close to the substa-
tion. Further, the start of the stage I>> is used to
block the infeeder protection if the fault is
located on the outgoing feeder.
The non-directional high-set stage I>>> is not
used in this example. When long operate times
are used for the directional stages, the second
high-set stage should however be used as back-
up protection. The stages I> and I>> can deter-
mine the direction of the current for about 2.5
s after a total collapse of the voltage. If a trip
signal is not delivered within 2.5 s after a voltage
collapse, the trip must be performed non-
directionally by the second high-set stage I>>>.
The directional element of each phase current,
determines the direction of the current by meas-
uring the phase difference between the current
and the opposite phase-to-phase voltage. Since,
in this case, the relay is used to protect a feeder
with the zero-sequence source behind the relay-
ing point, the base angle -30°should be, as
shown in Fig. 9 below, selected.
Fig. 9. Directional element of phase L1
U
3
U
23
U
2
ϕb
I
L1
No
operation
Forward
direction
ϕ
ϕb=-30°
+80°
-80°
U
1
In the resonant earthed network illustrated in
this example the relay module SPCS 2D26 is
used for the directional earth-fault protection of
the feeders.
Directional earth fault relays should also be used
at frequent network changes or when high sen-
sitivity is to be achieved. A directional earth-
faultrelayallowsearthfaults with fault resistances
of several thousand ohms to be detected in
overhead lines. Changes in the extension of the
network due to varying the network configura-
tion do not cause inselectivity, because the di-
rection of the earth fault current of a faulty
feeder is opposite to that of a healthy feeder.
The basic angle of the relay module SPCS 2D26
can be set at 0°, -30°, -60°or -90°. When the
network to be protected is resonant earthed or
earthed via a resistor as in this example , the basic
angle should be set at 0°. When an isolated
neutral system is protected the basic angle is set
at -90°. In addition it is possible to use an
external control signal BS1 or BS2 for selecting
the basic angle (0°/-90°) to be automatically
determined by the earthing situation of the
network. When the control voltage is connected,
the basic angle ϕb= -90°.
The start value of the low-set stage of the earth-
fault relay module should be set low enough to
fulfil the sensitivity requirements of the safety
regulations. The requirements regarding oper-
ate times are mainly fulfilled by the operation of
the high-set stage I02>.
Directional or non-
directional earth-fault
relay module
SPCS 2D26

20 ABB Automation
In the case described in example 1 the switches
of feeder protection relay SPAA 348 C can be
configured as follows:
Configuration of SPCS 4D11
Switch- Serial comm. Checksum Operation
group parameter
SGF1 S28 040 Definite time operation, CBFP in use, I>> directional
SGF2 S29 032 Automatic resetting of start indicators, I>>> not used
SGB1 S30 000 No blocking/control by the BS1 signal
SGB2 S31 000 No blocking/control by the BS2 signal
SGB3 S32 000 No blocking/control by the RRES signal
SGR1 S33 170 I> trip signal linked to TS2
I> and I>> start signal linked to output contact SS1
I>> trip signal linked to TS2
SGR2 S34 000 Not used
Configuration of SPCS 2D26
Switch- Serial comm. Checksum Operation
group parameter
SGF1 S49 003 Earth-fault stages I01> & I02> operate in forward
direction, basic angle ϕb= 0°
SGF2 S50 000 Resetting time of stages I01/U01 = 80 ms,
rated voltage of U0= 100 V, ∆ϕ = ±80°
SGF3 S51 008 Signal TS2 controls TRIP LED
SGF4 S52 016 U0deblocking criterion in use, TS2 starts
the circuit-breaker failure protection
SGF5 S53 000 No auto-reclosing
SGB1 S54 000 No blocking/control by the BS1 signal
SGB2 S55 000 No blocking/control by the BS2 signal
SGB3 S56 000 No blocking/control by the RRES signal
SGR1 S57 000 U0b> start signal not linked to output contacts
SGR2 S58 000 U0b> trip signal not linked to output contacts
SGR3 S59 000 I01> start signal not linked to output contacts
SGR4 S60 072 I01> trip signal linked to trip contact TS2 and SS4
SGR5 S61 000 I02> start signal not linked to output contacts
SGR6 S62 072 I02> trip signal linked to trip contacts TS2 and SS4