Alstom MCAG 34 - Page 17

17
Figure 2 Sensitivity check of restricted earth fault scheme by primary injection
Figure 1 Secondary injection of relay to check secondary operating current, setting voltage and
relay operating current
V
A1
A2
Stabilising resistor (if fitted)
Relay
Metrosil (if fitted)
Ammeter
(in plug bridge circuit)
A2
Stabilising resistor (if fitted)
Relay
Ammeter (in plug bridge circuit)
V
Primary injection
test set
A1