Loop Impedance Meter AMZC-304

Loop Impedance Meter AMZC-304

The most important features of AMZC-304 are:

Short circuit loop measurement (EN 61557):

  • Short circuit loop impedance measurement in networks with nominal voltage: 220/380V, 230/400V, 240/415V, with frequency 45…65Hz
  • Short circuit loop impedance measurement with 15mA current, without triggering RCD.
  • Detection of the replacement L and N in the socket and automatic swap in the meter.
  • Low voltage resistance measurement of protective circuits and junctions:
  • Measurement of resistance with ±200mA current
  • Calibration of test leads – possibility of using any length of test leads
  • Rapid check for the correct connection of PE wire using touch electrode.
  • Measurement of mains voltage and frequency
  • Power supply from LR6 batteries or NiMH accumulators (option).
  • The device meets the requirements of IEC 61557 standard.

Short circuit loop impedance ZL-PE , RCD measurement

Short circuit loop impedance ZS

Range

Resolution

Accuracy

0,00...19,99Ω

0,01Ω

±(6% m.v. + 10 digits)

20,0...199,9Ω

0,1Ω

±(6% m.v. + 5 digits)

200...1999Ω

No RCD reaction for I∆n ≥30mA,

Nominal work voltage Un: 220V, 230V, 240V

Voltage range: 180…270V

Nominal network frequency fn: 50Hz, 60Hz

Frequency range: 45…65Hz

PE terminal connection correctness check with the help of touch electrode

Short circuit current calculation for nominal voltage

Low voltage resistance measurement

Measurement of continuity of equipotential bondings and protective conductors with ±200mA current

Range

Resolution

Accuracy

0,00...19,99Ω

0,01Ω

±(2% m.v. + 3 digits)

20,0...199,9Ω

0,1Ω

200...400Ω

Open terminals voltage: 4…9V DC

Output current at R<2Ω: min 200mA ISC: 200...250mA)

Test leads resistance compension

Measurement for both current polarization

“m.v.” - measured value.

Short circuit loop impedance ZL-PE ,ZL-N ,Z L-L , resistance and reactance measurement

Short circuit loop impedance ZS

Range

Resolution

Accuracy

0,00...19,99Ω

0,01Ω

±(5% m.v. + 3 digits)

20,0...199,9Ω

0,1Ω

200...1999Ω

Nominal work voltage UnL-N / UnL-L : 220/380V, 230/400V, 240/415V

Voltage range 180…270V (for ZL-PE, ZL-N ) and 180…460V (dla ZL-L )

Nominal network frequency fn : 50Hz, 60Hz

Frequency range: 45…65Hz

Maximum measurement current 7,6A for 230V (3x10ms), 13,3A for 400V (3x 10ms)

PE terminal connection correctness check with the help of touch electrode (ZL-PE , ZL-PE(RCD) )

Short circuit current calculation for nominal voltage

Short circuit loop resistance RS and reactance XS

Range

Resolution

Accuracy

0,00...19,99Ω

0,01Ω

±(5% + 5 digits) of ZS value

20,0...199,9Ω

0,1Ω

Calculated and displayed for ZS <200Ω

Low current resistance measurement

Range

Resolution

Accuracy

0,00...199,9Ω

0,1Ω

±(3% m.v. + 3 digits)

200...2000Ω

Open terminals voltage4...9V DC

Output current ISC < 8mA

Accustic signal for measured resistance < 30Ω ± 50%

Test leads resistance compensation.

AC voltage measurement

Range

Resolution

Accuracy

0...299,9V

0,1V

±(2% m.v.. + 6 digits)

300...500V

1V

±(2% m.v. + 2 digits)

Frequency range 45...65Hz

Test result refreshing: twice per second

Frequency measurement

Range

Resolution

Accuracy

45,0...65,0Hz

0,1Hz

±(0,1% m.v. + 1 digit)

Voltage range: 50... 500V.

AMZC-304 Specifications

Electrical safety:

Type of insulation

Double, according EN 61010, 61557:2007-01

Measurement category

III 600V (CAT IV 300V)

Protection class acc. to EN 60529

IP67

Other technical data:

Power supply

Package of batteries (AA, 4 pcs.)

Batteries performance (short-circuit loop)

min.5000 measurements

Rated operational conditions:

Operating temperature

0...+50°C

Humidity

20-80%

Rated mains voltage

220/380V, 230/400V, 240/415V

Standard accesories

  • Adapter UNI-SCHUKO (WS-05)
  • Test lead with banana plug; 1,2m; red
  • Test lead with banana plug; 1,2m; yellow
  • Test lead with banana plug; 1,2m; blue
  • Pin probe with banana connector; red
  • Pin probe with banana connector; blue
  • "Crocodile" clip K02; yellow
  • Carrying case M6
  • Recevier - interface for radio transmission OR-1 (USB)
  • Hanging straps
  • Batteries
  • Operation manual
  • Calibration certificate

Optional accesories

  • Probe with START button with UNI-SCHUKO (WS-01)
  • Software for creation of documentation from electrical measurements
  • Triple phase socket adapter AGT-16P
  • Triple phase socket adapter AGT-32P
  • Triple phase socket adapter AGT-63P
  • Test lead with banana plug, 5m, red
  • Test lead with banana plug, 10m, red
  • Test lead with banana plug, 20m, red

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