Questions tagged [contactor]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
3
votes
3answers
505 views

Contactor control circuit overvoltage

I have a 12VAC-controlled contactor (ESB 20-20, rated for 12V @50Hz), and a 220/12 transformer that I intend to connect to the contactor. Unfortunately, rather than 12V, the transformer outputs 14V (...
0
votes
1answer
463 views

Correct design for large contactor circuit?

After some advice here I'm wondering if this is the correct design of my circuit. I'm now using a SSR as the control device to the contactor. The diode, I believe, should not only protect the SSR ...
2
votes
1answer
209 views

Relay/Contactor for 30A inrush, 250mA steady

I'm struggling to find any relay or contactor even close to the specs I need, and I've contacted many manufacturers. This is controlling a large contactor, so draws a 30A 24DC inrush current. It then ...
2
votes
2answers
922 views

Using capacitors to supply peak current

I hope this thread is allowed. Based upon my previous topic, which turned out to be the exact opposite of what I needed to accomplish, I have a few questions. I have a 240W 24V Supply: https://www.us....
0
votes
3answers
2k views

Suppressing contactor coil inrush, is this possible?

http://www.kvc.com.my/EnterpriseChannel/SharedResources/Datasheet/0/?ProductId=1000066755&Filename=SCHNEIDER-LX4-FH024.pdf I am trying to operate a 24VDC coil with an inrush of approximately 30A, ...
0
votes
1answer
174 views

What is “x Us” in a contactor coil specification?

I have a data sheet that gives the coil pickup voltage as "0.85…1.1 x Us] and coil dropout voltage as "0.3…0.6 x Us". I am assuming that Us refers to the nominal or specified coil voltage, but why is ...
0
votes
2answers
871 views

How to detect a plug is connected to socket

I have a plug and socket. Before I turn on power supply from a contactor, I need to detect if the plug is connected to the socket via a microcontroller. Any ideas on how to do this ? UPDATE: The Plug ...
4
votes
1answer
6k views

Using a Contactor or Relay to switch between two DC power sources?

I want to power a motor with a battery, however the complication arises as I want to have two power sources and be able to switch between them. The context of this problem is for an electric vehicle. ...

1
2