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1. Testing earth resistance of electric power
1.) Testing Earth Resistance Of Distribution
Circuitry
Usually most electrodes of neutral wire are connected
in parallel for three-phase, four-wire system. The
resistance is very low, so you only hook the clamp
around earth conductor to be measured to test the
distribution circuitry.Other earth electrodes become
supplementary electrode naturally.
2.) Testing Transmit Electricity Circuitry (Iron Tower)
Transmit electricity circuitry works by iron tower.The
earth system of iron tower connect with lightning rod
of iron tower, so iron tower that needn't tested becomes
very well supplementary electrode. This is a great
progress that is breakthrough from traditional tester
which throwed into supplementary electrode on the
road.
2. Electric power maintain of the factory
Usually the factory is divide into several different earth
network fields, so you can test earth resistance in this way:
3. Testing earth resistance of telecommunication
insulates the cables
To testing the shield lay which avoid circuit be interfered,
the earth resistance clamp can measure earth resistance
by directly and simply.