(1) group grounding wire DC resistance test, once every five years. Measure the DC resistance between the connecting noses. According to different road sections, the average resistance per meter is less than the specified value. When the test is difficult, check whether the contact between the connecting nose and the clamp and the copper conductor is good.
(2) Power frequency withstand voltage test of grounding insulating rod shall be conducted once a year. The test voltage is applied between the retaining ring and the fastening head, and the rated voltage test and power frequency withstand voltage test are carried out respectively.
(3) The test items, periods and requirements of personal protective grounding wire are basically the same as those of portable short-circuit grounding wire. Group DC resistance test, once every five years, measure the DC resistance between each terminal nose, and the average resistance per meter meets the specified requirements.
Extended data:
classify
(1) High voltage grounding wire can be divided into indoor bus grounding wire (JDX-NL) and outdoor line grounding wire (JDX-WS) according to the use environment.
(2) According to the voltage level, the high-voltage grounding wire can be divided into: 10KV grounding wire, 35KV high-voltage grounding wire, 1 10KV grounding wire, 220KV high-voltage grounding wire and 500KV high-voltage grounding wire.
(3) According to the national standard, the length of the insulating operating rod required for grounding wire is defined as follows:
380v grounding wire, 500v grounding wire, 6kv grounding wire, operating rod length 50CM.
10KV operating rod length of grounding wire 1 meter length
The length of insulation operating lever for 35KV grounding wire is1.5m.
1 10KV grounding wire insulation operating rod is 2m long.
The length of insulated operating rod of 220KV grounding wire is 2.5m
The length of insulating operating rod for 500KV grounding wire is 8m.
(4) According to the use voltage level of the environment, grounding wires can be divided into: 0.4kv, 6kv, 10kv, 35kv, 66kv, 1 10kv, 220kv, 330kv and 500kv.
(5) According to the AC environment and DC environment, grounding wires can be divided into AC three-phase grounding wires and DC single-phase grounding wires.
References:
Baidu Encyclopedia-10kv high voltage grounding wire
References:
Baidu encyclopedia-high voltage grounding wire