ABB REJ 525 - Page 4

4
1MRS 752137-MUM
Combined Overcurrent and Earth-Fault Relay
Operator’s Manual
REJ 525
3.3.2. Indication messages .........................................................22
3.3.2.1. Alarm indication messages .................................22
3.3.2.2. Disturbance recorder indication ..........................23
3.3.2.3. Internal fault ........................................................23
4. Technical description ............................................................. 25
5. Service ......................................................................................26
5.1. General ........................................................................................26
5.2. Commissioning testing .................................................................26
5.2.1. Function test .....................................................................26
5.2.2. Binary input test ................................................................27
5.2.3. LED test ............................................................................27
5.3. Secondary injection testing ..........................................................27
5.3.1. Testing of the overcurrent measuring transformers ..........29
5.3.2. Testing of the overcurrent stages .....................................29
5.3.2.1. Low-set stage I> .................................................30
5.3.2.2. High-set stage I>> ..............................................30
5.3.3. Testing of the earth-fault measuring transformer ..............30
5.3.4. Testing of the earth-fault stages .......................................31
5.3.4.1. Low-set stage I
0
> ................................................31
5.3.4.2. High-set stage I
0
>> .............................................31
5.3.5. Testing of the self-supervision system (IRF) ....................31
5.4. Spare parts ..................................................................................31
6. Ordering information .............................................................. 32
7. References ...............................................................................33
8. Index ......................................................................................... 34
9. Abbreviations .......................................................................... 36
10.Customer feedback ................................................................37