ZCXZ Series Substation Equipment Variable Frequency Series Resonance Withstand Voltage Test Device
Product Introduction
Capacitive equipment such as transformers, GIS systems, SF6 switches, CT/PT, insulators, busbars, cables, and bushings are the most common primary electrical equipment in substations. According to the test regulations for withstand voltage of primary electrical equipment in substations of 220V and below, the corresponding AC/DC withstand test equipment must meet both high-voltage, low-current test conditions and low-voltage, high-current test conditions, requiring a wide range of applicability. Using the principle of series resonance, the main equipment consists of a variable frequency power supply control box (operation console), an excitation transformer, reactors, and a capacitive voltage divider. By connecting a rectifier stack and a microammeter to the capacitive voltage divider, DC withstand voltage tests can be completed. Due to the excellent filtering characteristics after system resonance, the DC voltage produced is superior to the DC voltage obtained from rectification by ordinary test transformers. It is an ideal withstand voltage device for prefecture, city, and county high-voltage test departments and power installation, repair, and test engineering units.
Product Features
Compared with similar domestic products, this series of devices has several key advantages:
>Reactors of the same voltage level and capacity are smaller in size and lighter in weight; temperature rise is small at rated load; dry-type epoxy casting ensures high mechanical strength, good electrical insulation performance, beautiful and reliable.
>The variable frequency control source has large capacity margin; strong protection functions; good output waveform; good stability; multiple working modes, easy operation; uses 220V or 380V single-phase power supply, convenient for on-site power access.
>Flexible configuration. Different types of reactors can be selected to meet different test requirements, achieving multi-purpose use with high cost performance.
Technical Parameters
>Rated output voltage: 0～500KV (AC RMS) and below
>Output frequency: 20～300Hz
>Resonant voltage waveform: pure sine wave, waveform distortion rate <1.0%
>Maximum test capacity: 1000KVA and below
>Duty cycle: at full power output, continuous operation for 15min
>Quality factor: 30～90
>Frequency adjustment sensitivity: 0.1Hz, instability <0.05%
>Working power supply: 380/220V±15%/50Hz±5%
>Series product configuration and applicable scope
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Product Model Name |
Applicable Scope (AC withstand voltage equipment for electrical equipment in substations of 10kV～500kV voltage levels, frequency 30～300Hz)
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