TEL TAVRIDA ELECTRIC VCB15 LD, User Manual

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6.1 Switching
6.1.1 Closing
To close the ISM main contacts the CM close command shall be applied. It is a “dry contact“ input so no external
voltage should be applied.
The Close command will be accepted if:
• CM state is “Ready” (Ready LED flashes green);
• no Trip command is applied;
• optional electrical interlock is unlocked;
• mechanical and electrical interlock is unlocked (in case of ISM15_Shell_2 only).
If Close command is applied and held before the CM is in a “Ready“ state the Close command will not be
accepted. If auxiliary power is not available, the manual generator CBunit_ManGen shall be used to charge the
CM capacitors and to close the ISM. Mechanical closing is not possible.
1. Close command input
2. Trip command input
1 2
Figure 82
CM_16 close and trip inputs
If Manual generators CBunit_ManGen are used to charge the CM, the Manual generator handle shall be rotated
until the Ready LED of the CM flashes green (approximately 30 seconds). Then the ISM close command can be
applied to the CM. One possible variant is the connection of NO and Common contacts of relay Ready to the
Close command input of the CM. Be aware that in this case the ISM will be closed automatically once the CM
reaches the Ready state.
If Manual generators CBunit_ManGen are used for charging the CM, DC voltage outputs of the Manual
generator shall be connected to the power supply inputs (Figure 83) of CM_16_1. Pay special attention to the
correct polarity for CM_16_1(60_Par2_Par3).
Figure 83
CM_16 power supply connection
Power supply inputs
~ (+) ~ (-)
MCB