LOW VOLTAGE SWITCHGEAR TESTING
LOW VOLTAGE SWITCHGEAR TESTING
(OP)
I have to witness a low voltage switchgear factory test soon.
I only have project specifications which do not say much.
I like to know if there is any literature on line where I can look up for some of the important testing requirements
I only have project specifications which do not say much.
I like to know if there is any literature on line where I can look up for some of the important testing requirements






RE: LOW VOLTAGE SWITCHGEAR TESTING
RE: LOW VOLTAGE SWITCHGEAR TESTING
RE: LOW VOLTAGE SWITCHGEAR TESTING
In the U.S., UL 891 would typically apply for low voltage switchboards. If the specs require switchgear construction per ANSI standards, ANSI C37.20.1 and UL 1558 would apply. You must read the specs very carefully to determine which standards apply.
Any of these standards will require insulation resistance (megger) testing of the bus and control wiring, AC insulation strength (hipot) test, ground fault system test if applicable, operation of all circuit breakers and switches and functional testing of control schemes and interlocks.
NETA testing is much more comprehensive but would apply only if it is required by the specifications. NETA tests are normally intended to be performed after installation rather that at the factory.
RE: LOW VOLTAGE SWITCHGEAR TESTING