The D70 Series High Gradient MOV for GIS Arresters is a reliable and highly efficient MOV varistor. It is designed to provide superior protection against transient overvoltages and surges in 110-220kV gas-insulated switchgear (GIS) applications. The MOV varistor has a high current carrying capacity and a higher rated voltage than other MOV blocks, ensuring reliable protection. It is also designed to withstand extreme temperatures, making it suitable for a range of industrial and commercial applications. The D70 Series High Gradient MOV for GIS Arresters is a robust, cost-effective solution for protecting valuable equipment against damage due to transient overvoltages. Its low profile design and compact size make it an ideal choice for GIS applications where space is limited. With its high performance and long-lasting reliability, the D70 Series High Gradient MOV for GIS Arresters is the perfect choice for protecting your valuable equipment.
Type | D70H21.4HG |
Nominal discharge current In kA | 10 |
Suggested rated voltage kV | 5.44 |
Diameter mm | 70±1 |
Height mm | 21.4±0.3 |
AVG Gradient V/mm | 370 |
DC U1mA kV | 7.92±0.45 |
Iref mA | 5 |
Uref kV | 5.6 |
Ures kV | 12.59±0.74 |
8/20uS repetitive charge transfer Qrs C | |
2ms repetitive charge transfer Qrs C | 1.5 |
2ms duration of rectangular impulse current A | 800 |
4/10µs high current test kA | 100 |
Accelerated ageing test Kct | ≤ 1.0 |
Note:
The nouns, parameters and corresponding test methods in this parameter list conform to the standards of IEC60099-4:2014 and GB11032-2020.
The rated voltage, power frequency reference current and power frequency reference voltage are reference values.
The 2ms square wave tolerance value is based on the declared current/2ms repetitive charge transfer charge Qrs=423, if the actual test waveform 2ms current/2mS repetitive charge transfer charge Qrs is not equal to 423, it should be corrected according to the actual 2ms current waveform and Qrs value.
The charging rate of the aging test was 90%.
The number of pulses for the high current withstand value is two.
Type | D70H22.5HG |
Nominal discharge current In kA | 10 |
Suggested rated voltage kV | 5.22 |
Diameter mm | 70±1 |
Height mm | 22.5±0.3 |
AVG Gradient V/mm | 330 |
DC U1mA kV | 7.43±0.45 |
Iref mA | 5 |
Uref kV | 5.33 |
Ures kV | 11.89±0.75 |
8/20uS repetitive charge transfer Qrs C | |
2ms repetitive charge transfer Qrs C | 1.5 |
2ms duration of rectangular impulse current A | 800 |
4/10µs high current test kA | 100 |
Accelerated ageing test Kct | ≤ 1.0 |
Note:
The nouns, parameters and corresponding test methods in this parameter list conform to the standards of IEC60099-4:2014 and GB11032-2020.
The rated voltage, power frequency reference current and power frequency reference voltage are reference values.
The 2ms square wave tolerance value is based on the declared current/2ms repetitive charge transfer charge Qrs=423, if the actual test waveform 2ms current/2mS repetitive charge transfer charge Qrs is not equal to 423, it should be corrected according to the actual 2ms current waveform and Qrs value.
The charging rate of the aging test was 90%.
The number of pulses for the high current withstand value is two.
The D70 Series High Gradient MOV for GIS Arresters is a high-performance metal oxide varistor (MOV) block designed for 110-220kV GIS surge arresters. It offers superior performance with high-grade ZnO material and has a high energy absorption capacity. The built-in temperature compensation circuit ensures the varistor block can withstand high temperatures of up to 180°C. It has a wide operating range and is designed with a differential lead structure for better electrical stability. The MOV is highly reliable and has a long life expectancy. It is also resistant to corrosion and is non-flammable. The D70 series provides excellent surge protection for GIS arresters and is an ideal solution for high-voltage applications.
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