Manual 37138C
ESDR 4T - Current Differential Protection Relay
Page 8/46
© Woodward
Chapter 3.
Wiring
CAUTION
A circuit breaker must be provided near the unit and in a position easily accessible to the operator.
This must also bear a sign identifying it as an isolating switch for the unit.
NOTE
Inductive devices connected to the system (such as operating current coils, undervoltage tripping
units, or auxiliary/power contacts) must be connected to a suitable interference suppressor.
The following chart may be used to convert square millimeters [mm²] to AWG and vice versa:
AWG mm² AWG mm² AWG mm² AWG mm² AWG mm² AWG mm²
30 0.05 21 0.38 14 2.5 4 25
3/0
95
600MCM
300
28 0.08 20 0.5 12 4 2 35
4/0 120
750MCM
400
26 0.14 18 0.75 10 6 1 50 300MCM
150
1000MCM
500
24 0.25 17 1.0 8 10 1/0 55 350MCM
185
22 0.34 16 1.5 6 16 2/0 70 500MCM
240
