General Information 

Transformer on-load switch tester is a test equipment for testing the on-load tap changer of action sequence and switching time. Transformer On-load Tap Changer Tester is mainly applied to measure the  transient waveform,  transient time, transient resistance value, three-phase synchronization of transformer on-load tap-changers.

Feature

• Test transformers of type Y0, Y, and △, and display resistance values directly.
• Automatically analyze waveform faults and mark the faults.
• Automatically adjust resistance values and time ranges based on sampling data.
• Display synchronization status of three phases for transformer type △.
• Test with or without winding.
• Support four-terminal connection mode for high-accuracy resistance measurement.
• Enable continuous testing to save power-off time.
• Generate word reports.
• Equipped with an 800×480 colorized LCD with touch screen and a high-speed printer.
• Store up to 1000 groups of data and allow saving to USB flash disk.

Technical Specification

• Three phase constant current source charge,charge current: 3A/1A; 0.6A/0.2A
• Maximum voltage of the port: 24V
• Maximum range of transition resistance: 100Ω
• Measuring range: 1A：4Ω～20Ω 0.2A：10Ω～100Ω
• Record time of waveform:300ms
• Sample rate: 30k
• Resolution of time:0.1ms
• Resolution of resistance: 0.1Ω
• Accuracy of transition resistance: ±5% Reading±0.1Ω
• Accuracy of transient time: ±0.5% Reading±0.2mS
• Temperature: -10-40℃ Humidity: <85%RH