14
2019-03-06 / V1.0
Description
Contactors CT/CU Series – Installation and Maintenance Instructions
5.3 Switching diagram
The diagram below shows the switching states of the
CT contactors.
Typical values:
- Typical pull-in time: 250 ms
- Typical drop-o time: 60 ms
- Time constant of magnetic drive: approx. 90 ms
- Settling time for b0 switch: up to 10 ms
Zero position
O
Pull-in time
On
Drop-o tim
e
Settling time
O
Meaning:
Main contacts
Coil actuation
a1 contact
(well closed)
b0 contact
(well opened)
- Closed
- Open
- Active
- Passive
- Closed
- Open
- Closed
- Open
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