MZC-20E

Short-circuit Loop Impedance Meter

Mzc 20e Lm

The meter has been designed for fitters and measurement technicians performing services in residential buildings, office blocks, manufacturing plants and any facilities possessing a low-voltage electrical system. The instrument is also recommended for electrical maintenance personnel.

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 rangeResolutionAccuracy
0,00…19,99 Ω0,01 Ω±(2,5% m.v + 5 digits)
20,0…199,9 Ω0,1 Ω±(2,5% m.v + 3 digits)
100…200 Ω1 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 rangeResolutionAccuracy
0,00…9,99 Ω0,01 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 rangeResolutionAccuracy
1,15…9,99 A0,01 ACalculated based on the accuracy
for the short-circuit loop accuracy
10,0…99,9 A0,1 A
100…999 A1 A
1,00…9,99 kA0,01 kA
10,0…40,0 kA0,1 kA

Short-circuit loop impedance ZS measurement

Measuring cableZS measuring range
1,2m0,24…200 Ω
5m0,26…200 Ω
10m0,28…200 Ω
20m0,35…200 Ω

Voltage measurement

Display rangeResolutionAccuracy
0…440 V1 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

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