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Tester a scarica parziale UHF KDGF-C

Generatore ad alta tensione CC KDZG-II
Tester di resistenza CC del trasformatore KDRS-10A

Categoria:

Descrizione

Partial Ddischarge Tester

introduzione al prodotto

The KDGF-C UHF Partial Discharge tester is a specially developed and simple instrument for detecting electromagnetic wave and ultrasonic activity. Partial discharge An electrical discharge that does not completely short circuit the electrode. The amplitude of this discharge is usually very small. But they do lead to a continuous decline in the performance of the insulation layer, which ultimately leads to the failure of electrical equipment. Non-invasive partial discharge detection provides a fast and easy way to identify potential insulation failures that could cause power outages or cause injury to people. The most practical techniques for non-invasive detection are based on detecting the high frequency part of the electromagnetic spectrum as well as ultrasonic signals. The KDGF-C partial discharge tester is a specially developed and simple instrument for detecting electromagnetic wave and ultrasonic activity.

Partial Ddischarge Tester
Caratteristiche del prodotto.
1, airborne ultrasonic discharge activities Acoustic radiation in partial discharge activity occurs in the entire sound spectrum. It is possible to listen to sounds, but it depends on each person’s hearing ability. Using instruments to detect ultrasonic waves in the sound spectrum has several advantages. Instruments are more sensitive than the human ear, are operator-independent, operate at frequencies above audio, and are more directional. The most sensitive detection method is the use of ultrasonic sensors with a center frequency of 40 to 200kHz. This method can detect partial discharge activity very successfully.
2, airborne ultrasonic discharge activities When partial discharge activity appears in the insulation layer of the high voltage switch cabinet, it will generate high-frequency electromagnetic waves, which can only leak from the switch cabinet to the outer surface through the opening in the metal housing. These openings can be gaps in the housing or gaps around sealing gaskets and other insulating parts. When the electromagnetic wave travels outside the switchgear, it creates a transient voltage on the grounded metal housing. The transient ground voltage (TEV) is in the range of a few millivolts to a few volts and exists for a short time, with a rise time of several nanoseconds. Partial discharge activity can be detected by placing the probe outside the switch cabinet in a non-invasive manner.
Partial Ddischarge Tester
Ambito di applicazione non-invasive detection method is used to detect and locate partial discharge defects of high voltage electrical equipment.
detection principle ultra high frequency method (UHF), ultrasonic method (UA) and ground wave method (TEV).
detection frequency band UHF 300 ~ 1500(MHz), ultrasonic 20 ~ 200(KHz).
campo di misura ultra-high frequency is -80 ~ -20dBm, ultrasonic is 0 ~ 90dB
sensitivity minimum 10pC(depending on the distance between the sensor and the power supply)
sensor ① Ultra-high frequency sensor: 300 ~ 2000(MHz), with directional reception characteristics;
② Ultrasonic sensor: 20 ~ 200(kHz);
(3) Ground wave (TEV) : 10 ~ 70MHz.
with built-in ultrasonic sensor, ground wave, ultrasonic two-in-one sensor;
Software functions (1) Continuously detect UHF, geoelectric and ultrasonic signals to determine whether partial discharge exists;
2.The change trend of the measured signal is displayed in real time, which can make a more intuitive judgment on the development of
partial discharge signal;
③ With the on-site data storage function.
Instrument characteristics ① Screen display: high contrast 3.5-inch TFT color screen.
2.Data storage: 1000 groups of test data can be saved.
③ Working power supply: built-in 8.4V lithium battery, can work continuously for 8 ore.
Alimentazione elettrica: Input 100-240VAC, output 8.4V/3A, charging time 3 ~ 4 ore.
⑤ Dimensions: 220 * 100 * 40.
⑥ Instrument weight: 1.5kg.
⑦ Ambient temperature: -20℃ ~ 45℃.
⑧ Storage temperature: -25℃ ~ 60 ℃.
complete configuration host, sensor, AC adapter, connecting cable and transport box.