RSJFD-IV Partial Discharge Test Equipment ,

Partial Discharge Detection System

Product Introduction

RSJFD system detection method is pulse current method which is currently most widely used in the world, the basic principle is following: when the test object generates one time partial discharge, there is the transient voltage change △U on both terminals of the test object ,then go to the detection impedance Zm via a coupling capacitance Ck, then there will be one pulse current I in the circuit. Sample the pulse voltage generated when this pulse current I passes the detection impedance Zm , amplified and displayed, finally, it can determine the actual loaded discharge, etc. of the partial discharge. The pulse current method mainly uses the lower frequency part of the partial discharge signal frequency spectrum, which can avoid wireless interference.

RSJFD system is a testing system in the form of pulse peak indication, it possesses functions such as computer program-controlled filtering, amplification, sampling, storage and display. It can test the actual loaded discharge q, discharge repetition rate n, average discharge current I, and quadratic rate D, it also can make different atlases: q-n, q-φ, q-φ-t, etc.

Technical Parameters

Measuring channel: 2 channels

Detection sensitivity :0.1 pC

Programmable filter setting step

Low-end 10,20,40 kHz

High-end 100,200,300 kHz

Dynamic range of gain 120dB

Sampling frequency 0.1μs/point per channel

Sampling accuracy 8 bits ±1/2 LSB

Synchronous frequency 50, 100, 150, 200Hz or any other frequency

Standard pulse generator JFD－301

Standard pulse voltage 0.2V, 0.5V, 1V, 2.0V, 5V or 10V, adjustable

Calibrated capacitance 50pF or 200pF, adjustable

Rise time of pulse voltage for calibration ＜60ns

Fall time of pulse voltage for calibration ＞100μs

Working power supply AC220V±10%,50Hz