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MZC-20E

Catalog index: WMGBMZC20E

Fault Loop Impedance Meter

 

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Pocket measurements

Simple and ergonomic short circuit loop impedance meter Sonel MZC-20E.

The small MZC-20E meter allows for precise measurement of short circuit loop impedance in networks of different voltage ratings. With the use of this instrument, it is possible to test network voltage up to 440 V. The device is especially useful for installers and measuring engineers providing services in single- and multi-family buildings, office buildings, industrial plants and other buildings and facilities equipped with low-voltage electrical installations. The MZC-20E meter is also perfect for electrical maintenance services. Regardless of the area of application, in each case it guarantees smooth operation and high accuracy of the results obtained. A further advantage of this tool is its ability to operate in adverse environmental conditions, which is made possible by its very robust casing. Despite its compact dimensions, the meter performs its role flawlessly and serves well wherever precise and instant measurements are required.

Capabilities

  • Fault loop impedance measurement with 0.01 Ω resolution.
  • Operates in networks with voltages 220/380 V, 230/400 V, 240/415 V (operating range 180…440 V).
  • Operating frequency 45…65 Hz
  • Calculation of Ik fault current.
  • Automatic differentiation between phase and phase-to-phase voltage.
  • Possibility of applying test leads: 1.2 m, 5 m and longer.
  • Measurement with swapped L and N conductors.
  • Measurement of resistance (RS) and reactance (XS) components.

Additional features

  • Voltage measurement 0...440 V AC.
  • Power supply: batteries (4 x LR6) or rechargeable batteries (4 x NiMH).

Application

This meter is designed for measurements on objects protected by circuit breakers with rating up to 63 A, where fault currents reach 1 kA, i.e. in housing industry, single and multi-family houses, office buildings, small factories and all other facilities that are equipped with low-voltage electrical systems. In addition, the meter is a useful tool for maintenance services.

Specification

Measurements of impedance in a short-circuit loop Z within the range S
of 0.24…200 Ω
Short-circuit current IK: 1,15 – 958,3 A (Un =230 V)
AC voltage measurement: 0 – 440 V

Display range Resolution Accuracy
0,00…19,99 Ω 0,01 Ω ±(2,5% m.v + 5 digits)
20,0…199,9 Ω 0,1 Ω ±(2,5% m.v + 3 digits)
100…200 Ω 1 Ω ±(3% m.v + 3 digits)
  • Rated operating voltage UnL-N / UnL-L : 220/380V, 230/400V, 240/415V
  • Operating voltage range: 180…270V (for ZL-PE i ZL-N ) and 180…440V (for ZL-L )
  • Rated network frequency fn : 50Hz, 60Hz
  • Frequency operating range: 45…65Hz
  • Maximum measurement current: 15,3 A for 230 V (10ms) and 26,7 A for 400 V (10ms)

Short-circuit resistance RS and reactance XS display range:

Display range Resolution Accuracy
0,00…9,99 Ω 0,01 Ω ±(5% m.v. + 5 digits) of ZS value

Calculated and displayed fori ZS <10 Ω.

 

Short-circuit current IK display
Measuring range according to IEC 61557 can be calculated based on ZS
measuring range and rated voltage values.

Display range Resolution Accuracy
1,15…9,99 A 0,01 A Calculated based on the accuracy
for the short-circuit loop accuracy
10,0…99,9 A 0,1 A
100…999 A 1 A
1,00…9,99 kA 0,01 kA
10,0…40,0 kA 0,1 kA

Short-circuit loop impedance ZS measurement

Measuring cable ZS measuring range
1,2m 0,24…200 Ω
5m 0,26…200 Ω
10m 0,28…200 Ω
20m 0,35…200 Ω

Voltage measurement

Display range Resolution Accuracy
0…440 V 1 V ±(2,5% m.v + 3 digits)

Electrical safety:

  • type of insulation double, according to EN 61010-1 and IEC 61557
  • measurement category III 300 V according EN 61010-1
  • protection class acc. to EN 60529 IP67

Other technical data:

  • power supply LR6 alkaline batteries or NiMH rechargeable AA batteries (4 pcs.)
  • dimensions 220x98x58 mm
  • instrument weight incl. batteries 509g
  • storage temperature -20…+70 Co – working temperature -10…+50 Co
  • humidity 20…80%
  • reference temperature +23 ± 2 Co
  • reference humidity 40…60%
  • altitude < 2000m
  • Auto-OFF time max. 900 sec.
  • number of Z measurement (for rechargeable batteries) >5000 (2 measurement/minute)
  • display LCD segment
  • quality standard developed, designed and manufactured acc. to ISO 9001
  • the instrument is compliant with the requirements of IEC 61557
  • the instrument complies with PN-EN 61326-1:2006 and EN 61326-2-2:2006

Files to Download

Data Sheet

User Manual

Declarations of conformity

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