Moisture in Circuit breaker/ D20 RTU

[Pam60]

Hi All,

I have two completely unrelated questions and would appreciate your input. Ist topic is D20RTU and Second topic is AEG Vacuum type 38 kV outside metal class enclosed moisture isssue.

Q#1 A) What would be the purpose of a test relay in old
Datrac GE RTU ?
B) My setup has old electromechanical relays
connected to a the old DATRAC RTU. I was told
that there is a low set control interface relay
that can be activated by RTU through SCADA and can
change the relay settings during certain
situations. I was wondering, if you have heard of
some thing like this and is possible in case of
electromechacnical relays.
Q#2 A) A 600 A AEG vacuum breaker is placed outside in
a substation in a metal enclosed enclosure. I
was told that it needs very frequent maintenance
due to moisture ingress and that leads to tracking
on insulators connected to vacuum bottles and
control arms. What could a possible solution to this problem. Do you think anti condensation heaters will solve the problem.

I would appreciate your input.

 

[racobb]

Should have had the heaters to start with. Does it have them and maybe they are not working?

Alan

 

[Pam60]

Looks like they were not part of the enclosure because it was a retrofit and before that it had a oil circuit breaker in that enclosure.

But what ideas can be there to avoid some thing like this.

Is anti condensation heaters are the way to go. Could you kindly suggest some brand names that would supply some thing like this.

Thanks

 

[marks1080]

I normally just see heaters in enclosures referred to as 'heaters.' Is there any difference with an anti condensation heater? Either way, the enclosure should have a heater if it is outdoors.

 

[racobb]

They are usually nothing more than a 250 or 500 watt strip heater. Don't have a mfg. but most any electrical distributor can supply them. I would also add an adjustable thermostat so they won't be on 24/7.

marks1080:

No difference, but sure sounds more expensive huh!

Alan