Portable GT5306A Digital Display Insulation/Continuity Tester DC 250V/500V/1000V AC 750V For Electric Power Facilities

General Description

• Portable insulation and continuity tester with digital LCD display.

• Converts 9 V input voltage to high test voltages via internal DC-DC converter.

• Designed for medium-voltage insulation testing, small resistance, and voltage measurement.

Electrical Specifications

Insulation Resistance Test

• Test voltages: 250 V, 500 V, 1000 V

• Measurement ranges:

  • 250 V: 1 MΩ – 200 MΩ

  • 500 V: 1 MΩ – 200 MΩ

  • 1000 V: 1 MΩ – 2000 MΩ (2 GΩ)

• Accuracy: ±10% (typical)

• Short-circuit current: approximately 1.8 mA

Voltage Measurement

• DC voltage range: 0 – 1000 V

• DC voltage accuracy: ±(0.5% + 6 digits)

• AC voltage range: 0 – 750 V

• AC voltage accuracy: ±(1% + 6 digits)

• Input impedance for voltage measurement: approximately 1 MΩ

Continuity Measurement

• Resistance range: 0 Ω – 2 kΩ

• Continuity buzzer: sounds when resistance < 50 Ω

Display & Indicators

• Display type: 3.5-digit LCD (maximum reading “1999”)

• Backlit display with analog bar graph indication

• Sampling rate: about 3 readings per second

• Over-limit indication: red alarm light and buzzer when test voltage or range exceeded

Power Supply

• Power source: 6 × 1.5 V AA batteries

• Optional external power: DC 9 V / 1.5 A

Environmental Conditions

• Operating temperature: −15 °C to +55 °C

• Operating humidity: < 75% RH

• Maximum operating altitude: 2000 m (indoor use)

Physical Specifications

• Dimensions: approximately 172 mm × 118 mm × 65 mm

• Weight: approximately 0.5 kg (without batteries)

• Alternate size (varies slightly by batch): around 175 × 115 × 64 mm