Megger 220123.47 120 kV DC Dielectric Test Set

The Megger 220123.47 120 kV DC Dielectric Test Set is a high-voltage testing instrument designed for precise insulation and dielectric testing of electrical equipment. Engineered for industrial, utility, and laboratory applications, it ensures accurate verification of insulation integrity in transformers, cables, switchgear, and other high-voltage apparatus.

Capable of delivering up to 120 kV DC, the test set provides stable and controlled high-voltage output for testing insulation strength, detecting weaknesses, and identifying potential failure points before they lead to system downtime or hazardous conditions. Its advanced circuitry ensures low ripple and precise voltage regulation, providing reliable results across a range of insulation materials and voltages.

Built with operator safety in mind, the Megger 220123.47 features interlocked enclosures, emergency stop functions, and clear digital readouts. Its compact yet rugged design allows it to be deployed in both field and laboratory environments. With this dielectric test set, engineers and technicians can perform high-voltage insulation tests safely, efficiently, and in full compliance with international testing standards.

Key Features

• High Voltage Output: Provides up to 120 kV DC for insulation and dielectric testing.

• Precise Voltage Regulation: Stable and low-ripple output for accurate and repeatable results.

• Wide Application: Suitable for transformers, cables, switchgear, and other high-voltage apparatus.

• Safety Interlocks: Designed with interlocked enclosures and emergency stop features for operator protection.

• Digital Readout: Clear display for monitoring voltage, current, and test status.

• Compact & Rugged: Portable design for field use while robust enough for laboratory environments.

• Insulation Testing: Detects weaknesses, insulation deterioration, and potential failure points.

• Compliance: Meets international standards for high-voltage testing and dielectric measurements.

Specifications:

Voltage & Output

• DC Output Voltage: 0 – 120 kV DC

• Output Current: ~5 mA for 5 minutes, then 2 mA continuous at 220 V/240 V input

• Maximum system voltage (phase-to-phase): 35 kV AC

• Voltage ripple: <2 % under capacitive load, ensuring stable and accurate measurements

Measurement & Metering

• Digital display: shows test voltage and current

• Digital ammeter: multiple ranges (e.g., 0 – 19.9 µA, 0 – 199 µA, 0 – 1.99 mA, 0 – 5 mA)

• Ammeter resolution: up to 0.1 µA on the lowest range

• Voltmeter resolution: up to 100 V across full range

Input & Power

• Power supply: 220 / 240 V AC, 50 / 60 Hz

• Rectifier system: half-wave filter designed similarly to full-wave for long-term reliability

• Input protection: circuit breaker on input; output overload relay

• Zero-start interlock: prevents high voltage activation unless safety requirements are met

Safety Features

• Zero-start interlock to prevent HV output without proper safety conditions

• Protective breaker and overload relay to secure circuits against overcurrent

• Portable & modular design: control module separate from HV unit for operator safety

• Complies with international high-voltage test equipment safety standards

Dimensions & Weight

• Control unit: ~20″ H × 12″ W × 12.5″ D (~510 × 305 × 318 mm)

• High-voltage unit (120 kV): ~29″ H × 12″ W × 12″ D (~740 × 305 × 305 mm)

• Control unit weight: ~10.5 kg

• HV unit weight (120 kV): ~30 kg

• Cables & case: ~4 kg additional

Operating Environment (Typical for Series)

• Operating temperature: –30 °C to +55 °C

• Storage temperature: –40 °C to +65 °C

• Relative humidity: 0 – 90 % non-condensing during operation

Primary Applications

Designed for insulation and dielectric testing of medium/high-voltage cables, motors, switchgear, insulators, transformers, and other HV components up to 120 kV DC.