ex protector
Member
- Location
- Gemany, Bühl
Dear all,
greetings from Germany and a short question
I have to adapt a cabinet which is UL508A to a location Class I Division 1.
It will be x-purged.
Actual I have a main switch (20A) in the door which internally switches a circuit breaker (UL489).
For Class I Division 1 I need to switch off the cabinet in case of pressure loss.
I believe I would need a contactor in an Ex d box. So this switches power to the cabinet or off.
Do I need almost the switch in the door? Cabinet can only be opened with a tool.
And is it allowed to wire power lines first to the contactor in the Ex d enclosure and then to the circuit breaker in the pressurized cabinet?
I am thinking about the SCCR rating.
Beforehand may thanks for your support/comments
greetings from Germany and a short question
I have to adapt a cabinet which is UL508A to a location Class I Division 1.
It will be x-purged.
Actual I have a main switch (20A) in the door which internally switches a circuit breaker (UL489).
For Class I Division 1 I need to switch off the cabinet in case of pressure loss.
I believe I would need a contactor in an Ex d box. So this switches power to the cabinet or off.
Do I need almost the switch in the door? Cabinet can only be opened with a tool.
And is it allowed to wire power lines first to the contactor in the Ex d enclosure and then to the circuit breaker in the pressurized cabinet?
I am thinking about the SCCR rating.
Beforehand may thanks for your support/comments