1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
27
Equipment required for testing:
• adjustable voltage transformer 0...240 V, 1 A
• voltage transformer
• current transformer
• voltmeter, accuracy ±0.5%
• ammeter, accuracy ±0.5%
• stop watch or counter for time measurement
• ac/dc voltage source for the auxiliary supply
• switches and indicator lamps
• supply and pilot wires
• multimeter
The secondary current is to be selected on the basis of the rated current, 0.2 A or 1
A, of the relay energizing input to be tested.
The secondary voltage is always 100 V.
Note!
The current carrying capacity of the wiring, terminals and measuring transformers
of the relay is limited, see chapter “Technical data” in “Technical Reference
Manual”.
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Danger!
Do not open the secondary circuit of a current transformer under any phases of
the testing if the primary circuit is live. The high voltage generated by an open CT
secondary circuit could be lethal and may damage instruments and insulation.
!
L1
PC
4
4
x
4
4
4
x
3
3
3
x
3
2
2
2
2
2
2
1
x
1
1
1
1
100V
0.2 A
1 A
Test527
PO1
PO2
+
+
IRF
+
+ -
Uaux
Uob>
Io>
1MKC950001-1
2
3
~
Io>>
6 5
4 3
13 14 15
1 2
17 18
1 2 3 4 5 6
5
6
7
1
10 11 12
7 8 9
SO1
SO2
X1.1
X2.1
I/O
L1
L2
L3
+ (~)
- (~)
S2
S1
N
A
IRF
START
TRIP
START
TRIP
SGR1
SGR2
SGR3
SGR4
SGR5
SGR6
START
TRIP
SGB1
SGB1
SGB1
SGB1
SGB1
SGB1
V
See text!
4 SGB1
Optical
PC-interface
INDICATORS RESET
RELAYS & IND. RESET
MEMORIZED VALUES
RESET
Blocking of stage
Blocking of stage
Blocking of stage
Serial
port
TIMER START
TIMER STOP
SWITCHGROUP