NDF-103A Secondary Load Tester

Product Introduction

       Excessive comprehensive error in electric energy metering is a common and critical issue in the field. 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 wiring of voltage transformers. Among these four errors, the metering error due to the voltage drop in the secondary wiring of voltage transformers is often the most significant. The verification regulation 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

☆、Secondary load testing uses clamp-type ammeters to sample current without disconnecting the secondary circuit;
☆、Automatic range switching: During measurement, the range can be switched to different positions based on the measured values, ensuring measurement accuracy and display resolution;
☆、Equipped with a lightweight charger for convenient measurement; it can be used with an external charger when the battery is low;
☆、Compact size and lightweight design;
☆、Capable of storing 480 sets of measurement data, with data retention for up to ten years after power-off.

Technical Parameters

☆、Environmental Conditions   Temperature: -5°C to 40°C Relative Humidity: <95% (25°C)
☆、Altitude: <2500m
☆、External Interference: No strong vibrations or strong electromagnetic fields
☆、Technical specifications for PT secondary load testing
☆、Admittance measurement range: 0.1ms to 50.0ms
☆、Admittance measurement accuracy  Secondary voltage (50V to 120V)
      DX=±(X×2%+Y×2%) ±2 digits
      DY=±(Y×2%+X×2%×34.38) ±2 digits
      2 digits—instrument quantization error
      Grade 1 optional
☆、Voltage meter head: 0.005
☆、Technical specifications for CT secondary load testing
☆、Impedance measurement range: 0.1Ω to 50.0Ω
☆、Impedance measurement accuracy: DX=±(X×2%+Y×2%) ±2 digits
      DY=±(Y×2%+X×2%×34.38)±2 digits
      2 digits—instrument quantization error
☆、Current meter head: 0.01
☆、Dimensions (mm): 330mm×280mm×140mm
☆、Weight (kg): 5