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HM5008A Transformer On Load Tap changer Analyzer Description Video
Products Description
The on-load tap changer tester is designed in accordance with the "General Technical Conditions for High-Voltage Test Equipment" (DL/T 846.8-2004) of the Power Industry Standards of the People's Republic of China. It meets the requirements of the "Regulations on Handover and Preventive Tests for Power Equipment" for inspecting the operating sequence of on-load tap changers and measuring switching times. It enables precise measurement of parameters such as transition time, transition waveform, transition resistance, and three-phase synchronism for on-load tap changers, making it the ideal equipment for testing on-load tap changers.
Product Features
- Tests Y0, Y, and Δ-connected transformers; resistance values are displayed directly without conversion;
- . User-friendly data analysis automatically identifies faults in waveforms and marks them;
- . Waveform display automatically adjusts resistance and time scales based on sampled data;
- . Displays three-phase synchronism for Δ-connected transformers;
- . The instrument automatically distinguishes between single-resistor and dual-resistor configurations;
- . Tests can be performed with or without windings;
- . Four-terminal connection method provides high-precision resistance measurement without the need for lead compensation;
- . Continuous testing is possible during the test, reducing transformer downtime;
- . The instrument can generate Word reports, facilitating data management and retrieval;
- . The instrument is controlled by a compact computer, equipped with an 800×480 color LCD touchscreen and a high-speed printer, and supports an external mouse for convenient operation;
- . The instrument can automatically store 1,000 sets of data internally or save them to an external USB drive.
Technical Specifications
①. Three-phase constant-current charging; charging current: 3A/1A range; 0.6A/0.2A range
②. Maximum port voltage: 24V
③. Maximum range for transition resistance: 100Ω
④. Transition resistance measurement range: 1A range: 0.4Ω–20Ω 0.2A range: 10Ω–100Ω
⑤. Waveform recording duration: 300 ms
⑥. Sampling rate: 30 kHz
⑦. Time resolution: 0.1 ms
⑧. Resistance resolution: 0.1 Ω
⑨. Accuracy: Transition resistance: ±5% of reading ±0.1 Ω Transition time: ±0.5% of reading ±0.2 ms
⑩. Operating temperature: -10°C to 40°C Operating relative humidity: <85% RH
Operating Instructions
*Precautions During Operation:
①. The instrument can perform measurements with the coil attached, but live measurements are strictly prohibited; disconnect the test leads before testing;
②. When testing with windings, the non-test terminals of the transformer must be short-circuited and grounded; do not ground the instrument's O terminal;
③. For on-load switches that have not been operated for an extended period, operate the switch multiple times before testing to remove oxidation from the contact surfaces and impurities between contacts;
④. Before use, the instrument's ground terminal must be properly connected to ground;
⑤. Do not connect two or more sets of wires together as a single measurement circuit; unused wires must be left open-circuited;
⑥. Do not disconnect the test leads during the test;
⑦. After the test is complete, turn off the instrument before disconnecting all connections.
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