No partial discharge voltage withstand test device

NegotiableUpdate on 05/06

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Nature of the Manufacturer: Producers

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Overview

The non partial discharge withstand voltage test device is a specialized precision testing system used to evaluate the insulation performance of high-voltage electrical equipment. Unlike ordinary withstand voltage tests that only focus on whether the equipment is "broken down", the core task of this device is to detect and quantify whether partial discharge (referred to as partial discharge) occurs inside the insulation while applying high voltage, to ensure that the equipment has no potential defects under long-term operating voltage.

Product Details

The non partial discharge voltage withstand test device is a combination device that can generate high voltage and synchronously detect weak discharge signals. It usually includes a non partial discharge variable frequency power supply, a non partial discharge excitation transformer, a non partial discharge resistor, a capacitive voltage divider, and a partial discharge detector.

Objective: To discover bubbles, impurities, cracks, or electric field concentration points in insulation. These defects will generate small sparks (i.e. partial discharge) under high voltage, which may not immediately penetrate, but will gradually corrode the insulation and ultimately lead to equipment damage.

Main technical features:

Low partial discharge background: The device is designed with special insulation materials and shielding technology to ensure that the partial discharge of the device itself is less than the allowable value at rated voltage and does not interfere with measurements.

Strong anti-interference ability: There is a large amount of electromagnetic interference on site (such as corona, poor contact, communication signals). Modern devices typically have anti-interference functions such as digital filtering, pulse polarity discrimination, and frequency band adjustment to extract real signals.

Dual function: It can be used for pure withstand voltage testing (passing), partial discharge measurement (measuring discharge capacity), or a combination of both.

Main application scenarios:

This device is mainly used for power equipment with high insulation reliability requirements, especially for factory testing and type testing:

High voltage cables: Check the air gap at the main insulation or accessory joints.

GIS (Gas Insulated Switchgear): Check for internal particles or electrode burrs.

Power transformers and transformers: detect bubbles or moisture in oil paper insulation.

Generator: Evaluate the insulation condition of the stator bars.

UHV (J) series device parameters:
Inflatable non partial discharge test transformer

Rated capacity	25kVA
input voltage	380V±10%
output voltage	0-100kV
Partial discharge of the system under rated voltage	≤5PC
output current	250mA
voltage accuracy	AC 1.5%
Power distortion degree	＜3%
insulating medium	SF6 gas
Overall dimensions	Outer diameter: 520mm, height: 1200mm
weight	160kg

Non partial discharge regulator control box

Rated capacity	25kVA
input voltage	380V±10%
output voltage	0-430V
output current	62.5A
Overall dimensions	600mm×580mm×1200mm
weight	150kg

Isolation filter transformer

Rated capacity	25kVA
input voltage	380V±10%
output voltage	380V±10%
no-load loss	≤5%
impedance voltage	≤5%
Attenuation effect	10kHz-100kHz≥ 20db
Attenuation effect	100kHz-30MKz≥ 60db
Overall dimensions	500mmx300mmx550mm
weight	120kg

Non partial discharge capacitor voltage divider

high	900mm
capacitance	500-1000PF
Local volume	≤5PC

No partial discharge protection resistor

Overall dimensions	Diameter 60mm x length 600mm
weight	3kg

Note:

1. The appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice. If there is any act of theft or copying, legal responsibility will be pursued.

2. For more information on ultra-high voltage products, please enter the product center.

Product features

1. This console is a dedicated high-voltage non partial discharge test regulating and operating platform, equipped with start and stop buttons; Digital voltage, ammeter indication, time relay control time and alarm.

2. The operating voltage is continuously adjustable, and the waveform has no distortion or distortion.

3. It has zero position function, voltage upper and lower limits, overcurrent, and overvoltage breakdown protection functions.

4. The alarm has sound and light prompts.

5. The experiment is over, and the voltage is reduced to zero.

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