ABB KA-4, Instruction Leaflet

Page: 10 / 16

41-923.4M
10
7.4. FOR RELAYS TO BE USED WITH
KR-TYPE CARRIER OR TA-3 TONES
7.4.1. Receiver Unit
Calibrate as outlined under TC Type Carrier. Apply
15 mA dc current for polarity check. The pickup value
should be 4 milliamperes dc (armature moves to left)
instead of 40 mA. The calibration of reset (armature
moves to the right) should be done at 6 milliamperes
instead of 60 mA.
7.4.2. Alarm Unit
Calibrate as outlined under TC-type Carrier. Check
pick-up at 8 mA
±
5% instead of 80 mA. Dropout
should be between 4 and 6 mA instead of 40 and 60
mA.
8.0 RENEWAL PARTS
Repair work can be done most satisfactorily at the
factory. However, interchangeable parts can be fur-
nished to the customers who are equipped for doing
repair work. When ordering parts, always give the
complete nameplate data.
9.0 ENERGY REQUIREMENTS
9.1. CURRENT BURDEN AT 60 CYCLES
9.2. RATING OF OVERCURRENT UNIT
Continuous rating 5 amperes. One second rating 100
amps.
Current
Amperes
Volt
Amperes
Power
Factor
Angle
0.5
5
20
40
60
2.2
43
394
1240
2760
33°
†
70°
†
49°
††
39.2°
††
32.5°
††
†
Current lagging voltage .
††
Current leading voltage.