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Short circuit loop measurement

Loop impedance meters. Short circuit loop measurement. Resistance or Impedance ?. Principle of measurement L-PE circuit. Z Loop =Z sec +Z L1 +Z PE. I psc - prospective of short circuit current U n – mains voltage (220V or 230V). Z L1 – impedance of phase lead

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Short circuit loop measurement

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  1. Loop impedance meters Short circuit loop measurement

  2. Resistance or Impedance ?

  3. Principle of measurement L-PE circuit ZLoop=Zsec+ZL1+ZPE Ipsc- prospective of short circuit current Un – mains voltage (220V or 230V) ZL1 – impedance of phase lead Zsec – impedance of transformer secondary winding ZPE – impedance of protecting lead

  4. Loop impedance meter MZC-310S • High testing current of short-circuit loop measurement (up to 280A) with resolution 0,1 mΩ • Low testing current of short-circuit loop measurement (up to 42A)with resolution 0,01Ω • Touch voltage and shock voltage mesurement • Memory of 990 test results

  5. MZC-310S MENU Choose lenght of the leads for 2p method Choose nominal voltage Choose touche voltage or schock voltage measurement with 4 pole method

  6. LCD display Impedance „Z” Length of cables Type of method Prospective Short-Circuit Current Memory Resistance Reactance Impedance Main Result Voltage Frequency Voltage and frequency currently present on test terminals

  7. Measurement of impedance in L-PE circuit (2 pole method) Imax 42A

  8. Measurement of shock voltage UT

  9. Measurement of impedance in L-PE circuit (4 pole method) Imax 280A

  10. Measurement of impedance in L-PE circuit (4 pole method) • 4-pole method of testing a short circuit loop is specifically designed for testing installations with very low short circuit loop impedance (in sub-stations and power stations) • Other instruments while measuring short circuit loop impedance below 0.12Ω have a measurement error exceeding 30% which disturbs DIN VDE 0413 standards • Measurement range 7,2mΩ - 2Ω (1999mΩ)

  11. Measuring range

  12. MZC-200 MZC-300, MZC-303E MZC-310S

  13. Accessories

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