The D71 Series MOV for Substation Arrester is a highly efficient surge protection device designed for heavy load applications. It is engineered to provide reliable protection for substations against lightning, power faults, and other surges. The MOV varistor block has superior insulation properties and excellent dynamic characteristics, making it ideal for use in high voltage power systems. This device is particularly suitable for 330kV heavy load surge arrester, providing excellent performance and reliability.
Type | D71H22.5DC |
Nominal discharge current In kA | 10 |
Suggested rated voltage kV | |
Diameter mm | 71±1 |
Height mm | 22.5±0.3 |
AVG Gradient V/mm | 220 |
DC U1mA kV | 4.95±0.30 |
Iref mA | 5 |
Uref kV | 3.57 |
Ures kV | 8.17±0.50 |
8/20uS repetitive charge transfer Qrs C | |
2ms repetitive charge transfer Qrs C | 2.7 |
2ms duration of rectangular impulse current A | 1500 |
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 D71 Series MOV for Substation Arrester is an ideal solution for heavy load surge protection. This metal oxide varistor block provides superior protection against voltage transients and offers a cost-effective and reliable way to safeguard electrical equipment from damaging power surges. It is designed for use in 330kV substations and has a compact size for easy installation. As a leading zinc oxide varistor manufacturer, we ensure our D71 series MOV block for substation arrester incorporates the metal oxide varistor mov function, providing superior protection against voltage transients. Our zno blocks are designed to withstand heavy load surges, offering a cost-effective and reliable solution for safeguarding your substation equipment.
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