PANEL INTERNAL INTER LO CKING
APPAR ATUS CO NTRO L TESTING
40
1VLG5000 17 C
Step 2/7
Check the impossibility of inserting the circuit breaker into service when it is closed.
Step 3/7
Open the circuit breaker. Check the circuit breaker status on the protection relay LHMI.
Figure 57: Single line diagram, the circuit breaker is open and in the test position
Step 4/7
Move the circuit breaker truck out of the test position about a half turn of the crank. Check
the circuit breaker truck status on the protection relay LHMI.
Figure 58: Single line diagram, the circuit breaker is in the intermediate position
Step 5/7
Check that the interlock prevents the circuit breaker contacts closing if the truck is posi-
tioned between the service and test position.
Summary of Contents for UniGear Digital
Page 1: ...DISTRIBUTION SOLUTIONS UniGear Family UniGear Digital Commissioning and testing Guide...
Page 2: ......
Page 3: ...DISTRIBUTION SOLUTIONS UniGear Family UniGear Digital Commissioning and testing Guide...
Page 6: ......
Page 10: ......
Page 12: ......
Page 96: ......
Page 98: ...Visit us www abb com mediumvoltage Document Number 1VLG500017 Rev C...