Switching Sequence, Operation With Resistor Side First - ABB VUBB User Manual

2.2.1 Switching sequence, operation with resistor side
first
1. Position for continuous load through fixed contact 1.
2. Resistor auxiliary contact disconnects from fixed
contact 1.
3. Resistor vacuum interrupter opens.
4. Resistor auxiliary contact connects to fixed contact 2.
5. Resistor vacuum interrupter closes, producing a circulating
current.
1
Fig. 1.
Fig. 2.
Fig. 3.
1
Fig. 4.
1
Fig. 5.
1ZSC000562-AAL en | User's guide VUBB 7
2
1 2
1 2
2
2