Short-circuit Grounding Wire

Published: 2020-08-18 15:28:28

Category: Short-circuit grounding wire

Product Description

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Product Introduction

Before using the portable short-circuit grounding wire, it must be confirmed by voltage detection that the power is off and there is no voltage on the equipment. Connect the grounding clamp to the grounding grid, then use the operating rod to clamp the wire-end clamps respectively. The sequence for removing the short-circuit grounding wire from the equipment conductor is the reverse of the above.

Selection, Use and Maintenance Instructions

1. Correctly select the number of short-circuit grounding wires to be hung according to the safety work regulations, correctly select the hanging location, and correctly use the short-circuit grounding wire.

2. The selection should be able to withstand the short-circuit current of the hanging point. Its rated short-circuit current value must not be less than the fault current of the hanging point. When the reclosing is not removed, the impact of the second short-circuit current surge on the rated short-circuit current value of the short-circuit grounding wire should also be considered.

3. The length of the short-circuit grounding wire should be suitable for the equipment size and the distance to the fixed grounding point. The product of the square of the rated short-circuit current and the rated time should not be less than the product of the square of the fault current and the fault time. If the length of the grounding wire is less than 1.2 times the distance between connection points, it may cause more severe stress than in type tests; if too long, it may cause excessive working height during short circuits and strong swinging of the grounding wire.

4. Select the type of wire clamp according to the requirements for convenient hanging of the short-circuit grounding wire. The selection of the grounding operating rod should be consistent with the rated voltage of the system at the hanging point. When hanging the short-circuit grounding wire, ensure that the staff, the grounding wire, and the live equipment maintain the necessary safety distance. Before the grounding wire is properly hung, personnel should maintain a certain safety distance from the conductor to be grounded.

5. Before use, it must be confirmed by voltage detection that the power is off and there is no voltage on the equipment. Connect the grounding clamp to the grounding grid, then use the operating rod to clamp the wire-end clamps respectively. The sequence for removing the short-circuit grounding wire from the equipment conductor is the reverse of the above.

6. When installing the short-circuit grounding wire, consider the influence of the grounding wire swinging on the distance from live equipment. The safety distance should not be less than the value specified in the safety work regulations.

7. If there is no fixed grounding point available at the hanging point, a temporary grounding electrode can be used as a temporary grounding point. The burial depth should not be less than 0.6 meters.

8. It should be stored in a dedicated location with good ventilation and dry environment. Before each use, carefully check whether it is intact. If the wire clamp is cracked, the connection is loose, the protective layer is damaged, or the soft copper wire is exposed, it should be prohibited from use.

9. It should be regularly inspected according to the requirements of the electrical safety work regulations (inspection items are the same as factory inspection).

10. A portable short-circuit grounding wire that has passed the test should generally be scrapped after experiencing a short circuit.

Note: The above information and technical parameters are compiled and released by Yangzhou Dari Electric Co., Ltd.

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Product Details

Short-circuit Grounding Wire