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Dingzhou34/85 kV European-style surge arrester (20 kV)

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Product Description

　　Product Overview

　　● Rear-plug surge arresters, when connected to a front plug or an additional rear plug, provide overvoltage protection for electrical equipment.

　　● The surge arresters used in ungrounded neutral systems for transformers (18/20 kV) are: ZRYH5WZ-32/85 (substation type) and ZRYH5WX-34/90 (line type).

　　● In the transformer neutral grounding system (12/20 kV), the surge arresters used are of the following models: YH5WZ-26/66 (substation type) and YH5WZ32/85 (line type).

　　Electrical Performance

Project	Unit	YH5WZ-26/66 specifications	YH5WZ-32/85 specifications	YH5WX-34/90 specifications	HY5WZ-34/85 Specifications
System Nominal Voltage	kilovolt	20	20	20	20
Arrester rated voltage	kilovolt	26	32	34	34
Continuous Operating Voltage	kilovolt	20.8	25.6	27.2	27.2
DC 1 mA Reference Voltage	≥kV	37	47	50	48
Residual voltage of steep-wave impulse	≤kV	76	95	104	95
Lightning Impulse Residual Voltage	≤kV	66	85	90	85
Switching impulse residual voltage	≤kV	56	75	80	75
Square-wave impulse withstand	A	150	150	150	200
High-current surge withstand	kA	65	65	65	65