The D99 Series MOV for Substation Arrester is a state-of-the-art lightning arrester designed to protect substations from lightning and overvoltage surges. It is made up of a metal oxide varistor block that provides superior protection and stability against heavy load surges up to 750-1000kV. It is equipped with advanced features that ensure it is reliable and efficient in operation, even under the most challenging conditions. This lightning arrester has been designed to offer the highest level of protection and reliability to substations while being cost-effective and user-friendly. With its superior performance and safety features, the D99 Series MOV for Substation Arrester is the perfect choice for substation protection.
Type | D99H21.4HG |
Nominal discharge current In kA | 20 |
Suggested rated voltage kV | 5.3 |
Diameter mm | 99±1 |
Height mm | 21.4±0.3 |
AVG Gradient V/mm | 360 |
DC U1mA kV | 7.70±0.45 |
Iref mA | 5 |
Uref kV | 5.3 |
Ures kV | 11.60±0.72 |
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 metal oxide varistor manufacturer TGE's D99 Series MOV for Substation Arrester is a high-performance MOV block designed for use in 750-1000kV heavy load surge arresters. These blocks provide reliable protection against transient over-voltage and offers superior mechanical and electrical properties, making them ideal for a wide range of applications. They are highly resistant to high-frequency transients and shocks, as well as environmental influences such as humidity and corrosion. The mov blocks offer excellent high-voltage performance and long service life.
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