As we are aware, good insulation has
high resistance and poor insulation, which is basically low resistance. If we
need excellent insulation, the resistance usually reads in the megohm range. Insulation
resistance testing puts a subjective value of the electrical equipment on the
insulation and the internal insulation. Once the insulation test starts, apply
an immediate current (dc) voltage to the equipment under test.
Companies like Megger have
manufactured megger insulation tester
that enables you to install, improve efficiency and extend the life of assets
and cable systems at high, medium and low voltage.
Let’s read more on Megger test equipment:
The Megger insulation tester is a
small, portable instrument that gives you a direct reading of insulation
resistance in ohms or megohms.
Megger mit410/2 is
designed for electrical and industrial testing. The range for insulation testing
for this insulation tester is from 50 to 1000V and 200GΩ. The test results are
accurate and provide steady insulation test voltage. One can get exact RMS
voltage measurement to 600V AC or DC with resolution from 0.1mV. It performs frequency
measurement from 15 to 450Hz. Once set properly it routinely test to a time
limit and can provide live circuit detection and protection.
Megger has extensive precise ohm
meters that are quite simple to-work and can measure resistance with resolution
as fine as 0.1 micro-ohm.
Megger
micro ohm meter
measure the contact obstruction of switches and circuit breakers. It is a
light-weight around 1kg meter that can measure even high-current links. This
meter can make measurements using the Dual-Ground method for safer and more
efficient working.
Megohmmeter
Megger is
used to detect insulation failure that happens in motors and transformers. In this process high voltages are induced
into the windings of the electrical mechanism. The introduction of a large
amount of voltage will result in the detection of damaged insulation. The
voltages used in Megger insulation
testers can range from 50 V to 5000 V. The megohmmeter can easily detect if
there is insulation corrosion.
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