NDF-103B Secondary Load Tester

Product Introduction

       Excessive comprehensive error in electric energy metering is a common and critical issue in power measurement. The comprehensive error consists of the combined error of voltage transformers, the combined error of current transformers, the error of energy meters, and the metering error caused by the voltage drop in the secondary leads of voltage transformers. Among these four errors, the metering error caused by the voltage drop in the secondary leads of voltage transformers is often the most significant. The verification regulations for electric energy metering devices "SD109-83" and relevant technical regulations stipulate that the error caused by the voltage drop in the secondary circuit of voltage transformers must be measured accurately, quickly, conveniently, and reliably.

Product Features

☆、Capable of online measurement of secondary load for single-phase or three-phase simultaneously
☆、Handheld design, compact size, lightweight, and accurate testing
☆、Current measurement without disconnecting the circuit, using current clamps
☆、Online measurement of conductance, susceptance, and admittance of PT secondary circuits
☆、Online measurement of resistance, reactance, and impedance of PT secondary circuits
☆、SD card for program upgrades
☆、Built-in SD card for massive data storage
☆、Wide operating temperature range: -20~50℃

Technical Parameters

☆、Application:
      CT/PT secondary load impedance measurement
☆、Power supply: 185V～250V, 50Hz/60Hz
       Power: 40VA
☆、Voltage
       Measurement range: 0.1V~420V
       Measurement error: 0.5% reading ±5 digits
☆、Current
      Measurement range: 0.001A~6A
      Measurement error: 0.5% reading ±5 digits
☆、PT secondary load impedance
      Measurement range: 0.1~50Ω
      Measurement error: 1%±2 digits
☆、CT secondary load impedance
      Measurement range: 0.1~50Ω
      Measurement error: 1%±2 digits
☆、Environmental conditions:
      Operating temperature: -20℃～+50℃
      Storage temperature: -20℃～+50℃
      Relative humidity: 5%～95%, non-condensing
☆、Dimensions: Handheld terminal ×2: 135mm × 240mm × 55mm
      Outer packaging box ×2: 390mm × 290mm × 105mm
☆、Weight: Handheld terminal ×2: 1kg (excluding accessories)
      Total weight ×2: 2.5kg (including accessories)