Multi Measuring Instruments Co.,Ltd. Japanese Chinese
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Digital arrester tester

Digital Arrester Clamp Tester

PRODUCTS
Leakage and Harmonics Current Measurements For Arrester
Model ALCL-40L
Digital Arrester Clamp Tester. Model ALCL-40L
GENERAL
Lightning arresters are designed to protect a power distribution system by shunting to ground the high voltage surges caused by lightning.
ALCL-40L measures to warn that an arrester is damaged or deteriorated and should not be energized.
FEATURES
  • ALCL-40 is designed to test the diagnostic of OXIDE SURGE ARRESTER.
  • The least influence from the external magnetic field and noise by triple shielding for CT.
  • Compliant with IEC6099-5.
  • Enabled the measurement for 100nA resolution and harmonics current.
  • Motor operation for opening/closing of the jaw with extensional ABS glass fiber insulation rod.
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DETAIL
SPEC
SPECIFICATIONS
CT Sensor
CT : φ40mm
Opening/closing of the jaw : Motor operation
Withstanding voltage : AC 2300V, 1 minute (Between the core of CT and CT outer case)
Measuring and Display Unit
Measuring function : Leakage current, Harmonic current(Fundamental and third harmonics)
Measuring method : Dual slope integration mode
Measuring range : AC 0-300μA/3mA/30mA(3range manual)
Input frequency : 45-60Hz(Fundamental frequency)
AC conversion : AC coupled true rms responding
A/D conversion : Dual slope integration mode
Display : LCD Max. 3200 count
Sampling rate : 2 times/sec
Over indication : "OL" mark on LCD
Low battery Indication : "Low" mark on LCD
Data hold function : "DH" mark on LCD
Auto power off : Approx.10 minutes later after power on
Power supply : AA size Alkaline battery × 4
Limitation of circuit voltage : Less than 500V AC
Operating Temperature : 0～40℃, less than 80%RH, w/o condensation
Storage Temperature : -10～60℃, less than 70%RH, w/o condensation
Dimensions : 160(W)×950(L)×84(D)(When retracted)
160(W)×3680(L)×84(D)(When stretched)
Weight : Approx. 2.6kgs
AC Current
Accuracy : (23℃±5℃, less than 80%RH)
Range Resolution Accuracy(45～65Hz) Max.Input Current
300μA 100nA(0.1μA) *
1.2%±8digit
 40A rms
3mA 1μA(0.001mA)
30mA 10μA(0.01mA)
Crest factor : < 3 (0-50% of the range)
< 2 (50-100% of the range)
Harmonic Current Measurement (Fundamental and third harmonics)
Measuring method : PLL method
Minimum fundamental input : More than 3% of full scale in each range
Accuracy : (1%±5digit)±(Basic accuracy of ACA)
-(Error by neighboring harmonics)
* Accuracy specified : More than 4% harmonics are necessary against fundamental harmonics
Accessories :
CT cover case : 1
Instruction manual : 1
 
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