YH5(10)W-12 / YH5(10)W-12J Surge Arrester

The YH5(10)W-12/YH5(10)W-12J is a 12kV gapless polymer surge arrester for overhead distribution transformers. With 5kA/10kA nominal discharge current, it diverts lightning and switching overvoltage energy to ground, protecting system equipment. Compliant with IEC60099-4:2014, it features a stainless steel upper terminal, zinc oxide varistor, and heavy pollution withstand capability suitable for demanding environments.

product details

Product Overview

The YH5(10)W-12 and YH5(10)W-12J are gapless, polymer-housed surge arresters rated at 12kV, purpose-built for overhead distribution line transformer protection. They employ high-quality zinc oxide varistors to rapidly conduct overvoltage energy from lightning strikes and switching surges safely to ground. Designed in full compliance with IEC60099-4:2014, these arresters deliver dependable, long-lasting performance in heavy pollution areas and at altitudes up to 1000 meters.

Product Features

◆ Rated voltage 12kV, with selectable nominal discharge current of 5kA or 10kA.
◆ Superior surge protection: lightning impulse residual voltage ≤36kV (crest), steep current impulse residual voltage ≤42.2kV (crest), switching impulse residual voltage ≤31.7kV (crest).
◆ Robust energy handling capacity: withstands long duration current impulses up to 250A and high current impulses up to 100kA (crest).
◆ Durable polymer housing in dark grey or light grey, with stainless steel 304 upper terminal (M12) and lower terminal (M10).
◆ Flexible configuration with optional NEMA A/B mounting bracket, disconnector, earth lead, bird guard cap, and line clamp.
◆ Engineered for heavy pollution levels, maximum ambient temperature 40°C, and 50Hz rated frequency.

Product Advantages

● Fast, reliable overvoltage protection through gapless zinc oxide technology, eliminating follow current and reducing equipment damage risk.
● Comprehensive surge handling covers lightning, steep current, and switching impulses, ensuring all-around transformer safety.
● Lightweight, high-strength polymer housing outperforms traditional porcelain with superior pollution performance and safer failure mode.
● Full IEC60099-4:2014 compliance assures internationally benchmarked quality and safety for global power distribution applications.

Application Scenarios

◆ Overhead distribution line transformer surge protection (primary use case).
◆ Class 1 or Class 2 distribution-type arrester installations in urban and rural power networks.
◆ Lightning-intensive regions requiring robust and fast-responding overvoltage suppression.
◆ Heavy pollution environments at altitudes up to 1000 meters, where reliable outdoor insulation performance is critical.

Technical parameter

Electrical characteristics	Specification		Unit
Rated voltage of Surge arrreser	12		kV
Nominal discharge current	5	10	kA
Rated frequency	50		Hz
Maximum continuous operating voltage	10.2		kV
Steep current impulse residual voltage	42.2		kV(Crest)
Lightning Impulse residual voltage	36		kV(Crest)
Switching Impulse residual voltage	31.7		kV(Crest)
Long duration current impulse withstand voltage	150	250	A
High current impulses	65	100	kA (Crest)
Rated Short-circuit current	20 / 12 / 6 / 0.6 ± 0.2		kA
Class of Surge arrester	Class 1 or Class 2
Application	Distribution type
With or without gap	Gapless
Designation of arrester	Design B

Spare parts
NEMA A or B mounting bracket	with/without
Disconnector	with/without
Earth lead	with/without
Bird guard cap	with/without
Line clamp	with/without
Upper terminal (incoming line) bolt size	M12
Lower termina (outgoing line) bolt size	M10

Material
Upper terminal	Stainless steel 304
Housing	Polymer type
Color of housing	Dark grey / light grey
Varistor	High quality zinc oxide varistor
Size of Varistor	35mm / 38mm /40mm / 42mm