1. Place the dead front (galvanized metal sheet cover) and tighten
the 4 bolts.
14
Appendix E
Opening time and ride through
The standard opening time is 280-320 ms for 400 A non- latched contactors .
In the contactor unit the ride-through capability is achieved by operating the contactor coil at a excess current of that required to keep the contacts closed during
normal operation.
The coils have the ability to store energy, the contactor has the ability to ride through a voltage sag or complete voltage dropout.
HCV-5HA (No Latch) Opening time
The HCV-5HA opening time, with terminals 3 & 4 jumpered, and switching power on and off to terminals 1 & 2, is between 280-320 ms.
The HCV-5HA opening time, with terminals 1 & 2 continuously powered, and switching (opening) contacts connected to terminals 3 & 4, is between 20-30 ms.
When required decrease of the opening time to 20-30 ms, it must be veried according with the protections coordination (considering the fuses operation time) for
a safe operation. For example: particularly for 24R fuse, is mandatory increase 100ms the trip time in the protection relay in order to ensure that contactor opening
time is not less than fuse operation time.
If required more information, please consult the factory.
21 SafeGear
®
Motor Control Center Controller Installation, Operation and Maintenance Manual
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