15.75-20KV HY5WD-20/45 Special Generator Type Zinc Oxide Arrester

The core component (resistor) of the metal oxide arrester uses a zinc oxide-based formula, which has very nonlinear (volt-ampere) characteristics, that is, under normal operating voltage, the current passing through is only microamperes. level, when encountering overvoltage, the passing current instantly reaches thousands of amperes, causing the arrester to be in a conducting state and releasing the overvoltage energy, thus effectively limiting the damage of overvoltage to power transmission and transformation equipment.
Traditional silicon carbide arresters have shortcomings such as high steep wave discharge voltage caused by steep wave discharge delay and high operating wave discharge voltage caused by large operating wave discharge dispersion. Zinc oxide arresters have good steep wave response characteristics, no delay to steep wave voltage, low operating residual voltage, and no discharge dispersion. The protection margin under steep waves and operating waves is greatly improved, and in terms of insulation coordination, the protection margins under steep waves, lightning waves and operating waves can be nearly consistent, thereby providing high-quality protection for power equipment. Composite jacketed metal oxide arrester adopts integral injection molding and two-end encapsulation process. It has good sealing performance and explosion-proof performance. It is resistant to dirt and requires no cleaning and can reduce the occurrence of wet flash in foggy weather. It is resistant to electrical corrosion and aging. It's small in size, durable in weight and easy to install and maintain. It is an updated product of the porcelain sleeve arrester.

Voltage level

Place of use

System nominal voltage (kV) effective value

Arrester model

Arrester rated voltage (kV) effective value

Gapless arrester

Gap arrester

Residual voltage peak value (kV) (not greater than)

2000μS square wave flow capacity (A)

4/10 Large current withstand capability (kV)

Arrester continuous operating voltage (kV) effective value

DC 1mA reference voltage (kV) effective value

Maximum leakage at 0.75 times DC voltage (μA)

The effective value of power frequency discharge voltage (kV) is not less than

1.2/50 The peak value of impulse discharge voltage (kV) is not greater than

Maximum conductive current (μA)

8/20Lightning impulse current

0/60 operating surge current

1/4 steep slope impulse current

Special generator type

15.75-20kV

HY5WD-20/45

20.0

15.7

28.0

50

-

-

-

45.0

36.0

50.4

400

65