NGR, NER Monitor
NGR, NER Monitor
(OP)
Dear All.
Im locking for NGR, NER Monitor.
Im found such devices at the Straco site, but it only for high resistance/impedance systems with low ground current. What about low impedance? We have something on the market?
Anyone have experience with such monitors?
Thanks in advance.
Best Regards.
Slava
Im locking for NGR, NER Monitor.
Im found such devices at the Straco site, but it only for high resistance/impedance systems with low ground current. What about low impedance? We have something on the market?
Anyone have experience with such monitors?
Thanks in advance.
Best Regards.
Slava






RE: NGR, NER Monitor
To me, low-impedance grounding components are intended to be strictly low duty cycle, with typical protection/monitoring using a CT at the grounded terminal, with one or two inverse-time overcurrent relays for breaker tripping.
I will be interested to hear other opinions about this.
RE: NGR, NER Monitor
Rafiq Bulsara
http://www.srengineersct.com
RE: NGR, NER Monitor
Im sorry, I see now, my Q was not correct.
Of course, busbar, Rafiq you are right.
I saied about NGR damages monitor, not about ground fault monitor
some monitor of... maybe Ohm's , connections-some kind of on-line monitor.
I hope,Im more clear noe
Best Regards.
Slava
RE: NGR, NER Monitor
Jim
RE: NGR, NER Monitor
Do you mean to monitor integrity or condition of the resistor itself? Like to know if it is deteriorating/ degrading overtime? Is that what you mean?
Rafiq Bulsara
http://www.srengineersct.com
RE: NGR, NER Monitor
Yes, Rafiq, you understood me right.
Landsford, you are right too.
I don't know, maybe we don't need such devices..don't know.
Best Regards.
Slava
RE: NGR, NER Monitor
At least that is cleared up. Although I have not heard of or employed such a monitoring device, perhaps someone has.
Just a thought that modern multifunctional relays may be set to check for and alarm much lower current (as additional function), but I never looked at them with that in mind.
Rafiq Bulsara
http://www.srengineersct.com
RE: NGR, NER Monitor
Thanks a lot to all.
If no..no problem.
Best Regards.
Slava
RE: NGR, NER Monitor
Hope this helps
RE: NGR, NER Monitor
It's other devices, but exactly what Im looking for.
BTW, it seems as STARCO devices.
OK, from here, I will ask directly to STARCO or Littlefuse.
Best Regards.
Slava
RE: NGR, NER Monitor
Best regards.