ABB REJ 527 Operator's Manual page 27

1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator's Manual
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.
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".
N
L1
S1
TIMER START
A
V
See text!
X1.1 1 2 3 4 5 6
)LJ  6HFRQGDU\ WHVW FLUFXLWU\ IRU WKH HDUWKIDXOW UHOD\ 5(- 
L1 L2
S2
U aux
SO2 SO1
IRF
X2.1 17 18 1 2 13 14 15 10 11 12 7 8
+
~
+ -
IRF
SGR1
4
START
Uob>
5 SGB1 SGR2 4
Blocking of stage TRIP
SGR3
x
Io> START
SGB1 SGR4
6 4
TRIP
Blocking of stage
SGR5
4
Io>> START
7 SGB1 SGR6 4
Blocking of stage TRIP
1 SGB1
INDICATORS RESET
I/O
SGB1
2
RELAYS & IND. RESET
SGB1
3
MEMORIZED VALUES
RESET
4 SGB1
SWITCHGROUP
REJ 527
+ (~)
PC
- (~)
L3
TIMER STOP
PO2 PO1
9 6 5 4 3
+ +
Optical Serial
PC-interface port
x 2 1
3 2 x
3 2 1
3 2 1
2 1
x
3 2 1
27