Merlin Gerin NS breakers (protection)
Merlin Gerin NS breakers (protection)
(OP)
Could somebody explain the Io adjustment pot on the NS breakers I have fitted. Some of my units have this faclity and others dont?
Jeff
Jeff
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Merlin Gerin NS breakers (protection)
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RE: Merlin Gerin NS breakers (protection)
23SE,43 ME,53UE.The adjusment is defined as multiplication Io x Ir.
But if you have NS with termal magnetic trip unit TM-D or TM-G the adjusment of overload protection is chosen only by one pot - Ir ( rated as 0.8, 0.9 and 1 of nominal current indicated in Amps). Im in TM trip unit as for electronic indicates magnetic protection against short-circuit.
The same for motor protection trip unit STR 22ME - you have only one adjusment Ir rated in Amps for long time overload protection.
The tripping time of overload protection:
CB will trip within 2 hours for a current equal to
120% of Ir for electronic trip units
130% of Ir for thermal-magnetic
CB must not trip for a load under 105% of Ir.
RE: Merlin Gerin NS breakers (protection)
cctdiag
RE: Merlin Gerin NS breakers (protection)
mdom seems to have covered it very well ( I wonder if he /she works for them ??)
as a suggestion give your local MG rep or reseller a call and lean on him MG have some excellent publications on their gear.
Regards
Don
RE: Merlin Gerin NS breakers (protection)
cctdiag,I can propose www.squared.com/us/products/ or
www.schneider-electric.com for more information about
Compact NS
Best regards