QLDJS-EB Dielectric Loss Tester

The QLDJS-EB Dielectric Loss Tester tapped frequency display high-voltage dielectric loss and capacity field-test instruments into a compact, all-in-one device. It utilizes frequency conversion technology for perfect elimination of interference generated by the power frequency, thereby providing accurate results even when tested under severe electromagnetic interference conditions. The device can provide voltages as high as 10 kV for field tests on transformers, insulators, and cables.

Performance & Precision:

High precision with excellent performance, reaching leading levels in China
Capable of oil dielectric loss measurement

Safety & Protection Features:

No high voltage output when grounding is poor
Power-off protection
High-voltage ground drop protection
CVT high-voltage and low-voltage four-limit protection for voltage and current

Measurement Capabilities:

Multi-frequency output support
Compatible with industrial frequency power supply, series resonant external high voltage, and external standard capacitance
Automatic identification of external power supply frequency
Single-connection simultaneous measurement of CVT C1 and C2 functions (EB type specifically supports this)

Channel Configuration (EB Type):

Dual-channel measurement with one positive and one reverse connection channel

Advanced Features (Upgraded Models):

Voltage Control: Freely adjustable voltage settings (e.g., 5123V)
Test Frequency Range: 40-70Hz with single frequency customization (e.g., 48.7 Hz)
Automatic Dual Frequency Conversion:
- 50±0.1Hz to 50±10Hz (freely adjustable)
- 60±0.1Hz to 60±10Hz (freely adjustable)
AC Withstand Voltage Testing: Suitable for PT/CT secondary testing and 400V low-voltage systems