Partial Discharge Detector
Widely applicable for partial discharge measurement of various high-voltage electrical products such as transformers, instrument transformers, high-voltage switches, switchgear, zinc oxide arresters, power cables, etc., as well as type tests of products and insulation operation monitoring.
The Partial Discharge Detector has high detection sensitivity, wide capacitance coverage range of test objects, wide applicability to test samples, complete input units (detection impedances), and multiple frequency band combinations (nine types). After proper calibration, the instrument can directly read the discharge quantity of discharge pulses. Both pointer and digital meters display simultaneously, and the pointer meter can conveniently select logarithmic or linear scale indication as needed.
Technical Specifications:
1. Capacitance range of testable objects: 6pF~250uF
2. Detection sensitivity and allowable current (see Table 1).
3. Elliptical scanning time base
(1) Frequency: 50, 100, 150, 200, 400Hz
(2) Rotation: in steps of 30 degrees, rotatable up to 120 degrees.
(3) Operating modes: Standard - Expanded - Linear.
(4) Input voltage range for high-frequency elliptical time base: 13~275V.
4. Display unit
Uses a 100×80mm rectangular oscilloscope tube with brightness and focus adjustment knobs.
5. Amplifier
(1) 3dB low-frequency cutoff fL: 20, 40KHz selectable.
(2) 3dB high-frequency cutoff fH: 200, 300KHz selectable.
(3) Gain adjustment: coarse adjustment in 6 steps, with a gain difference of 10 times ±5% between steps.
(4) Fine adjustment range: >10 times.
(5) Asymmetry of positive and negative pulse response: <5%.
6. Time window Relay Protection Tester http://www.baishidq..com
(1) Window width: 5 degrees to 150 degrees (50Hz) continuously adjustable.
(2) Window position: each window can be rotated from 0 degrees to 170 degrees.
(3) Two time windows can be controlled separately or simultaneously.
7. PD instrument pulse peak meter
(1) Linear indication: 0~100 with error not greater than 5%.
(2) Logarithmic indication: 1~100 with error not greater than 5%.
8. Equipped with a zero-marking system to assist in identifying the phase of discharge pulses.
9. Power supply: 220V±10% Power frequency
