The UHV-109 CT/PT Polarity Tester is a multifunctional, intelligent, and portable device designed for comprehensive testing of current transformers (CTs) and voltage transformers (PTs). It integrates three key tests-volt-ampere characteristics (evaluating excitation performance and error limits), ratio testing (verifying transformation accuracy), and polarity testing (confirming winding phase relationships)-into a single system. With high-precision measurement, automated operation, and report generation capabilities, this instrument streamlines both field and laboratory testing while ensuring metering accuracy and relay protection reliability in power systems.

Product Parameters

Item		parameter
Working power supply		AC220V±10% ,50Hz
Device output		0 ~ 2500V (Current Max set 20A)
High current output		0～1000A
Excitation measurement accuracy		≤0.5%(0.3%* reading +0.2%* range)
CT ratio measurement	The scope of	≤5000A/1A(25000A/5A)
	precision	≤0.5%
PT ratio measurement	The scope of	5~220kV
	precision	≤0.5%
The work environment	The temperature	－10℃ ～ 40℃
	humidity	≤90%
	The altitude	≤1000m
size		410mm × 260mm × 340mm
The weight of the		≤25kg

Battery Maintenance

1. Charge/Discharge Management:

Use the original charger for charging.

Avoid storing the instrument with a fully depleted battery for extended periods (weeks or months). For long-term storage, perform a full charge-discharge cycle every 2–3 months (fully charge the battery, use it until a low-battery warning appears, then recharge fully) to maintain battery health.

Avoid charging under extremely high or low temperatures.

2. Storage Charge Level:

Before long-term storage, charge the battery to approximately 50%–70%.

3. Replacement:

When battery runtime significantly degrades (e.g., below 70% of its original capacity) or noticeable swelling occurs, contact the manufacturer or an authorized service center for original battery replacement. Never use non-standard batteries.

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