TAVRIDA ELECTRIC VCB Series, User Manual

Page: 90 / 142

90
Operation description Required tool Approximate timing
Operation check
Turn on the CM auxiliary power supply then check
the following:
-
The “Power“ LED must light up immediately;
-
The “Ready“ LED must light up continuously
within 15 s after switching on;
-
The “Malfunction“ LED must not light up;
-
The “Ready“ relay contact must close within
15 s.;
-
The “Malfunction or Loss of auxiliary
suppl
y“ relay contact must change its state
1)
;
-
The “ISM main contact position” relay contact
must not change its state;
- ISM main contacts must not change their
state (ISM shall remain open).
Visual check, no tool is required 1 minute
Apply close command to the CM then check the
following:
-
The “Power“ LED must light continuously;
-
The “Ready“ LED must light continuously;
-
The “Malfunction“ LED must not light up;
-
The “Ready“ relay contact must not change
its state;
-
The “Malfunction or Loss of auxiliary
supply“ relay contact must not change its
state;
-
The “ISM main contact position” relay contact
must change its state;
- ISM main contacts must change their state
(ISM shall be closed).
Visual check, no tool is required 1 minute
Apply trip command to the CM then check the
following:
-
The “Power“ LED must light continuously;
-
The “Ready“ LED must light continuously;
-
The “Malfunction“ LED must not light up;
-
The “Ready“ relay contact must not change
its state;
-
The “Malfunction of Loss of auxiliary
supply“ relay contact must not change its
state;
-
The “ISM main contact position” relay
contact must change its state;
- ISM main contacts must change their state
(ISM shall be open).
Visual check, no tool is required 1 minute
1) „As earlier, after CM power supply disconnection this relay indicated the CM state: “Power supply voltage is absent for more than 1.5 seconds“