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Ior Logger

KEW 5050

KEW 5050
Unpreceded Ior Logger!
• Provides simultaneous measurements and logs up to 4 channels
• Supports various wiring systems (Single-phase 2&3-wire, Three-phase 3&4-wire)
• World’s fastest 200ms interval for leakage current measurement
• Offers both traditional leakage / load current measurements
• Large graphic display and magnet on the back case to attach it on metal enclosures
  • Backlight
  • USB
  • External
Wiring configuration 1P2W, 1P3W, 3P3W, 3P4W
Measurements and
Ior : Leakage current (Trms) with resistive components only
Io : Leakage current (Trms) with basic wave of 40 - 70Hz
Iom : Leakage current (Trms) including harmonic components
V : Reference voltage (Trms) with basic wave of 40 - 70Hz
Vm : Reference voltage (Trms) including harmonic components
R : Insulation resistance, Frequency(Hz), Phase angle(θ)
Other functions Digital output, Print screen, Back light, Data hold
Recording Interval 200/400ms/1/5/15/30s/1/5/15/30m/1/2hours
Range 10.000/100.00/1000.0mA/10.000A/AUTO
Accuracy For reference voltages of sine wave 40 - 70Hz and 90V Trms or higher,
±0.2%rdg±0.2%f.s. + clamp sensor amplitude accuracy + error
of phase accuracy*
(phase error)
* add ±2.0%rdg to measured Io value when using Ior leakage
clamp sensor.
(θ: within the accuracy of reference voltage/ current phase
difference ±1.0°)
Allowable input 1% - 110% (Trms) of each range, and 200% (peak) of the range
Display range 0.15% - 130% (display “0” for less than 0.15%, “OL” if the range
is exceeded)
Io *Range, Allowable input and Display Range are the same as Ior .
Accuracy ±0.2%rdg±0.2%f.s.+ clamp sensor amplitude accuracy
Iom *Range, Allowable input and Display Range are the same as Ior .
Accuracy ±0.2%rdg±0.2%f.s.+ clamp sensor amplitude accuracy
Sampling speed 40.96ksps (every 24.4μs), gapless, calculate
Trms values every 200ms.
Range 1000.0V
Accuracy ±0.2%rdg±0.2%f.s. * for waveforms of sine wave 40 - 70Hz
Allowable input 10 - 1000V Trms, and 2000V peak
Display range 0.9V - 1100.0V Trms (display “0” for less than 0.9V, “OL” if the
range is exceeded)
Phase angle(θ)
Display range 0.0° - ±180.0° (regarding the phase of reference voltage as 0.0°)
Accuracy Within ±0.5° for the inputs of 10% or higher of leakage current
range, sine wave 40 - 70Hz, reference voltage of 90V Trms or
Frequency meter range 40 - 70Hz
External supply AC100 - 240V(50/60Hz) 7VA max
Power source LR6(AA)(1.5V) × 6 (Battery life approx. 11h)
Display / update period 160 × 160dots, FSTN monochrome display / 500ms
PC card interface SD card (2GB) *standard accessory
PC communication
USB Ver2.0
Temperature and
humidity range
23±5°C, less than 85%RH(without condensation)
Operating temperature
and humidity range
-10 - 50°C less than 85%RH(without condensation)
Storage temperature
and humidity range
-20 - 60°C less than 85%RH(without condensation)
Applicable Standards IEC61010-1 CATⅣ 300V , CATⅢ 600V Pollution degree 2
IEC61010-2-030 , IEC61010-031 , IEC61326
Dimension/Weight 165(L) × 115(W) × 57(D)mm/approx. 680g (including batteries)
Included accessories 7273(Voltage test lead)
8262(AC adapter)
7278(Earth cable)
7219(USB cable)
8326-02(SD card 2GB)
9125(Carrying case)
Instruction manual, Cable marker, Software installation manual
LR6(AA) × 6
KEW Windows for KEW 5050(software)
Optional accessories 8177(Ior Leakage clamp sensor 10A type Ø40mm)
8178(Ior Leakage clamp sensor 10A type Ø68mm)
8329(Power supply adapter)

Shows insulation resistance (R) values determined by the following formula.
V: Reference voltage/ Ior: Leakage current
Displayed value is just for reference since the measurement method differs from insulation
resistance testers and may not be consistent with each other.

Accessories/Optional Accessories /Related Products

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  • Instruction Manual
  • Software

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Instruction Manual

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