Compact-1 Turns Ratio Tester – Transformer Turns Ratio Instrument

Compact-1 is a portable Turns Ratio Tester designed for accurate and safe transformer turns ratio testing during commissioning, maintenance, and field inspections. It applies a low-voltage excitation on the LV side and precisely measures the induced HV voltage, ensuring operator safety and reliable results.

Why Transformer Turns Ratio Test Is Important

The turns ratio test of transformer verifies the correct turns ratio between high-voltage and low-voltage windings. Any deviation may indicate winding faults, tap-changer issues, or manufacturing defects. Compact-1 helps detect these issues before transformer energization.

Key Features of Compact-1 Turns Ratio Tester

• Turns ratio range from 1.000 to 200.0
• Class 0.2 accuracy for precise measurement
• LV side excitation for maximum operator safety
• Multi-parameter testing: Turns Ratio, Excitation Current, HT & LT Voltages, Polarity, % Deviation
• 4-wire connection method for stable and repeatable results
• Stable internal reference voltage immune to power fluctuations
• Supports standard vector groups YNyn0 and Dyn11
• Portable handheld design for field and on-site testing

Technical Specifications

Applications

• Transformer commissioning and pre-energization testing
• Routine maintenance and condition monitoring
• Repair workshops and transformer manufacturing units
• Utility substations and industrial power plants

Principle of Operation

Compact-1 applies an internally generated 1.0V AC test signal to the transformer’s low-voltage winding and measures the induced voltage on the high-voltage winding to calculate the transformer turns ratio accurately.

Accessories Supplied

• HT & LT test cables (5 meters)
• Charging adapter
• Calibration certificate
• User manual

Compact-1 is an ideal Transformer Turns Ratio Tester for engineers looking for a reliable, portable, and accurate solution for transformer testing.