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XIII. Packing List
Note: Please do not disassemble the instrument, including the panel. Because it may
break the internal connection line of the instrument and cause the instrument to
malfunction. Failures caused by this situation are not covered by the warranty.
7 Ground Impedance Test of Grounding Device of Transmission Line
Tower
General requirements for grounding impedance testing of transmission line tower
grounding devices are as follows
∶
a) tower grounding impedance test should be three-pole method, but also circuit
impedance method. When three-pole method should be used to verify the test results.
There is usually power frequency interference in b) transmission lines. The test current
should be greater than 100 when using three-pole method mA, and the test current
should be greater than 300 when using circuit impedance method to ensure the validity
and accuracy of the test.
There is a certain inductive component in the grounding impedance and test circuit of the
c) tower grounding device, and the output current of the test instrument should be 40 Hz~
60Hz standard sine wave.
No.
Name
Qty
1
Main engine
1
2
Power line
1
3
Ground stake
2
4
Ground lead
1
5
Voltage lines (P1 yellow, P2 green) each
5m
2
6
Current wire (C1 red, C2 black) each 5m
2
7
Fuse pipe (built-in)
2
8
Print paper
1
Summary of Contents for HZDW-DB
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