Kuidas klamber ampermeeter kohtunik maa leke rike punkt?
1. kohtuotsus maa leke viga punkt klamber ampermeeter
When a ground leak fault occurs in a distribution line or a motor control device, it is difficult to out the specific ground fault point. The method of judging leakage maandus vead koos a klamber ampermeeter ei vaja võimsus katkestused või juhtmestik.
Sekund, klamber ampermeeter meetod to määra leke maandus viga punkt
Kui a maa leke rike esineb in a jaotusliin või elektriseadmed, it on raske leida välja spetsiifiline maa viga punkt.
The method of using clamp ampermeeter to measure leak maandus viga in madalpinge võimsus võrk on the eelised of no need for power katkestus, valgus seadmed, no juhtmestik for testing, intuitiivne lugemine, lihtne toiming, etc. It can kiiresti ja täpselt määra leke maandus viga punkt.
If a ground leak fault occurs in a certain phase line or equipment, you can first test power transmission in phases on the main switch of the low-voltage power supply in the power distribution room. The method of ajutiselt remove other two-phase fuse can be used. Then, on the neutral point grounding wire of the distribution trafo T, the nihik ampermeeter, as shown in Joonis 1, mõõdud the neutral wire praegune iga iga faas joon vastavalt. Üldiselt rääkimine, faas joon koos suurem neutraalne joon on joon koos a maa viga või a tõsine potentsiaal viga.
After the faulty phase line is determined, the main line of the phase line (three-phase four-wire power distribution part) can focus on checking kas the overhead line is broken and dropped to the ground, and the overhead line is connected to the wiring, phone line and broadcasting line. phase-to-ground short circuit fault.
After finding out that there is no problem with the main line, use a clamp amper to measure and check the single-phase branch line. The inspection and test method is shown in Figure 2.
After testing and confirming that there is a ground leakage fault in a certain branch line, you can use the "half method" to carry out key inspections on the branch line. From: Home of Electrical Technology
When it is found that there is a ground leak fault in a certain user, use a clamp amper to check the user from the lamp holder, switch, socket, etc., and then further check the wires. During the inspection, attention should be paid to places where wires pass through walls, turn, cross, twist, and are easy to corrode, easy to damp, and lihtne to valtsida masinad ja sõidukid.
