GE MFAC 14 User Manual page 15

Stabilising resistor (if fitted)
Figure 1 Secondary injection of relay to check secondary operating current, setting voltage and
relay operating current.
Figure 2 Sensitivity check of restricted earth fault scheme by primary injection.
A2
A1
Primary injection
test set
Stabilising resistor (if fitted)
Relay
Metrosil
Ammeter
A1
(in plug bridge circuit)
V
V
A2
Relay
Ammeter (in plug bridge circuit)
15