WEG VBWC Series Installation,Operation And Maintenance Instruction page 27

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notes:
1: Undervoltage Release (terminals D1, D2).
2. Secondary Opening Release (terminals 11 and 12).
3. When there is a Secondary Opening Release, the terminals (40,41 and 54,55) will not be available for option 10a and 10b.
4. Closing and Opening Releases are single pulse, except for the opening release (110~220 V dc).
5. The aforementioned optional accessories cannot be selected simultaneously.
6. The circuit shown above is based on the off state of the circuit breaker and the loading spring properly loaded.
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Vacuum Circuit Breaker | 27