HY5W-3/10 Zinc Oxide Arrester with Electrical Switchgear Euipment
The CPD test is similar to the general pressure test, except that
the CPD voltage is not fixed, but is raised to the lightning
arrester discharge. It is advisable to cut the power supply at the
rate of 3 ~ 5 000 volts per second, so it should be installed in
the test circuit.
Testing of ZnO arrestors MOA is a new type of overvoltage
protection equipment, which has better protection performance than
silicon carbide lightning arrester, so it is widely used in power
system. Pilot projects, cycles and requirements are specified in
the precautionary test protocols for electrical equipment. The test
of ZnO lightning arrester, in addition to the insulation
resistance, base insulation resistance, discharge counting, and
other conventional test items, also to measure the DC voltage 1MA
voltage and 0.75 MA voltage leakage current.
The purpose of measuring the leakage current at 0.75 times DC
voltage is to detect the change of the long-term allowable working
current, which should not be greater than 5 MiA, which is closely
related to the life of the lightning arrester.
|Rated Voltage||Work Voltage||AC Current|