WDHG-LY4 Six-channel full-function power frequency transformer tester （Touch Screen）

It is designed for automatic testing of protection and metering CT/PT, suitable for laboratory and field testing.

• Supports detection of CT and PT

• Meet the requirements of GB1207, GB1208 and other regulations.

• No need to connect other equipments, a single machine can complete all the test items, and complete the excitation and ratio polarity test at the same time in one test.

• Comes with a miniature fast printer, which can directly print the test results on site.

• Easy to operate, with smart prompts, making it easier for users to get started. .

• Large-screen LCD, graphical display interface.

• Automatically give CT/PT (excitation) inflection point value according to regulations.

• Automatically give 5% and 10% error curves.

• It can save 3000 groups of test data, which will not be lost after power failure.

• Support U disk dump data, can be read by standard PC, and generate WORD report.

• Small and lightweight ≤28Kg, very useful for field testing.

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Product Details

Main test function

CT (protection, metering)	PT
• Volt-ampere characteristic (excitation characteristic) curve	• Volt-ampere characteristic (excitation characteristic) curve
• Automatically give inflection point value	• Automatically give inflection point value
• Automatically gives 5% and 10% error curves, and can measure the actual value of the limit coefficient (ALF)	• Ratio measurement
• Ratio measurement, polarity judgment	• Polarity judgment
• Ratio measurement	• Ratio measurement
• Phase (angular difference) measurement	• Phase (angular difference) measurement
• One pass flow test	• AC withstand voltage test
• AC withstand voltage test	• Secondary load test
• Secondary load test	• Secondary winding test
• Secondary winding test	• PT volt-ampere voltage multiple is adjustable (1.2—3.5)
•Measurable volt-ampere characteristics of medium and low voltage transformers and zero-sequence transformers
• Measurable GIS, casing CT
•Comprehensive test, complete excitation and ratio polarity in one test at the same time

Main technical parameters

Item		Parameters
Working power		AC220V±10%, 50Hz
device output		0～2500V 5KVA Maximum setting value 20A
High current output		0～1000A
Excitation accuracy		≤0.5% (0.2%reading+0.3%range)
Secondary winding resistance measurement	Range	0.1～300Ω
	Accuracy	≤1.0% (0.4%reading+0.6%range)
Secondary actual load measurement	Range	5～500VA
	Accuracy	≤0.5% (0.2%reading+0.3%range)±0.1VA
Phase measurement (angular difference)	Accuracy	4min
	Resolution	0.1min
CT ratio measurement	Range	≤50000A/5A (10000A/1A)
	Accuracy	≤0.5% (0.2%reading+0.3%range)
PT ratio measurement	Range	≤500KV
	Accuracy	≤0.5% (0.2%reading+0.3%range)
Working environment		Temperature: -10℃～40℃, Humidity: ≤90%, Altitude: ≤1000m
Size and weight		Size: 450mm × 280mm × 340mm, Weight: ≤28Kg

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