Cómo medir la fuga de 220v línea con multímetro
El problema de medición 220V fuga con multímetro no adecuado , porque qué usted quiere medir es fuga corriente. Medición débil AC corriente con multímetro es una debilidad, y él es también problemático para medir él incorrectamente . Si usted tiene a medir él , usted podría como bien usar una pinza metro 2c pero usted debe elegir una pinza metro con rango apropiado y mejor sensibilidad.
If it is suspected that the circuit is leaking, it can be judged by the gap with leakage protection, and the range of leakage can be judged step by step to eliminate the fault.
I don't think it's apropiado to mida la línea fuga con electric blocking. Because since it is leakage, that is, the resistance between the live wire and the protective ground is not infinite, but the voltage of the mulmeter is not enough to explain the insulation between them, that is to say, the insulation resistance at 9V is is completely different from that at 220V V. Por lo tanto, la medición de aislamiento resistencia es siempre mayor que la potencia consumo voltaje a obtener fiable datos. Entonces tú debes usar a a agitación tabla.
Of course, if you just test si hay a a cortocircuito o a path between the live wire and the protective ground, it is also possible to block it it with a mulmeter. Just can't measure the insulation data between them.
Estrictamente hablando, a agitación mesa debería ser usado a medir si el circuito de línea aislamiento resistencia es fugas. El temblor mesa es equivalente a 1000v o 500v generador. El fuga corriente pasas a través el muestreo resistencia dentro la sacudida tabla, y el muestreo voltaje indicador es generado en la resistencia. Bajo normales circunstancias, la estabilidad de más de 0.5 megaohmios es cualificada. La batería interior el multímetro es 9v a 15v % 2c y la resistencia rango y voltaje rango puede solo determinar el corto circuito y aproximadamente juzgar si hay fuga.
1. Power-off measurement: Turn off and disconnect all electrical appliances, use multimeter RX10K, one probe receives the measuring wire, and the other probe is grounded (or faucet), which should show infinite resistance, otherwise it will leak.
2. Live measurement: use a multímetro to press the 250-volt alternating current to measure the metal shell of the electrical appliance suspected of leakage. One probe is connected to the shell, and the other probe is grounded (or faucet). When the pointer shows that the voltage is higher than 30-50 volts, switch to the 50-}volt alternating current gear. If the power supply is confirmado a ser fuga arriba 30 voltios, it is normal if it is lower than 30 volts. Then switch the zero and fire power supply plug wire and measure it again.
3. Leakage measurement between live wire and neutral wire (or live wire and live wire): Turn off and disconnect all electrical appliances, and measure the resistance between live wire and neutral wire, which should be infinite, otherwise it is leakage.
The accuracy of troubleshooting with the above method is 99.9 percent , which is convenient, rapid and practical. However, the megohm special shaking table is only used in engineering, which is inefficient in maintenance. Only when the multimeter is measured and confirmed to be good, but the line does leak electricity, can the shaking table be used, but the leakage electricity cannot be measured by the multimeter.
