ABB VD4 Installation And Service Instructions Manual page 18
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Also See for VD4:
- Installation and service instructions manual (73 pages) ,
- Product manual (56 pages) ,
- Instruction manual (44 pages)
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V D 4 - INSTALLATION AND SERVICE INSTRUCTIONS
18
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4. Description
4.10 Permissible number of vacuum interrupter switching operations in
Fig. 7:
mechaism side
relation to breaking current
VD4 63kA for 17.5kV, 275mm pole centers,
Diagram A
Fig. 7a: Permissible number of vacuum interrupter operating
cycles n as a function of the breaking current Ia
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