Surge arrester is the basis of insulation coordination of all kinds of electrical equipment (transformer, reactor, capacitor, generator, engine, PT, CT, circuit breaker, contactor, etc.) in power system. Metal oxide arrester is the most advanced product of conventional surge arrester in the world. The core working element of this product is fired with zinc oxide based polymetallic oxide powder. It has excellent nonlinear shape and volt ampere characteristics, corresponding fast steep wave and large flow capacity.
HY5WS series surge arrester is mainly used in power distribution equipment.
| Model Number | HY5WS-3.8/15 | HY5WS-5/15 | HY5WS-7.6/30 | HY5WS-10/30 | |
| Rated Voltage（KV） | 3.8 | 5 | 7.6 | 10 | |
| Nominal Voltage(KV) | 3 | 3 | 6 | 6 | |
| Continuous Operating Voltage(KV) | 2 | 4 | 4 | 4 | |
| DC (U1mA) Reference Voltage
Not Less Than (KV) |
7.5 | 7.5 | 15 | 15 | |
| Maximum Residual Voltage Peak
(KV) |
Steep Waves
Shock Current |
17.3 | 17.3 | 34.6 | 34.6 |
| Lightning Strikes The Current | 15 | 15 | 30 | 30 | |
| Operating Shock Current | 12.8 | 12.8 | 25.6 | 25.6 | |
| 2000μs Square Wave
Flow Capacity (A) |
75 | 75 | 75 | 75 | |
| 4/10μs Peak Impulse Current (KA) | 40 | 40 | 40 | 40 | |
| Maximum Leakage Current
At 0.75 DC Reference Voltage (μA) |
50 | 50 | 50 | 50 | |
Technical parameter
Note: For transformers with a rated capacity of 500kVA and below, the load loss values above the slash line in the table apply to the Dyn11 connection group, and the load loss values below the slash line apply to the Yyn0 connection group; The weight and length, width and height data in the table are for reference only.
This vacuum contactor is widely used in industrial and commercial power systems, including motor starting, transformer switching, capacitor bank switching, and distribution panels. It is ideal for electrical contractors, industrial plants, commercial facilities, and electrical wholesalers who need a robust, space‑saving solution for medium‑voltage control and protection.
Key product features include:
-
High‑voltage AC switching capability
Rated for 7.2/12 kV AC systems, suitable for medium‑voltage motor control and power distribution. -
Vacuum arc‑quenching technology
Provides fast arc extinction, low contact erosion, and high electrical endurance for frequent switching. -
Compact and modular design
Easy to integrate into switchgear cabinets and custom control panels. -
High mechanical and electrical life
Designed for long‑term operation with reduced maintenance costs in industrial environments. -
Standardized mounting and connection
Compatible with common busbar and cable layouts, simplifying installation by electrical contractors. -
OEM/ODM and low MOQ support
Custom labeling, specifications, and accessories available from the manufacturer, with flexible minimum order quantities. -
Wholesale‑oriented pricing
Competitive wholesale pricing for distributors, wholesalers, and international suppliers sourcing in volume.
As a professionalvacuum contactor manufacturerand OEM factory, we supply CKG3‑series vacuum contactors to industrial users, commercial users, electrical contractors, and distributors worldwide, backed by technical documentation and application support.