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High Voltage Dry Wall Bushing

A wall bushing is a device that allows electrical cables and wires to pass through walls while maintaining insulation and preventing damage. They are typically made of high-quality, non-conductive materials such as rubber or porcelain. Wall bushings are designed to protect cables from abrasion, while also providing a seal to prevent the entry of moisture and other contaminants.

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High Voltage Wall Bushing Wall Bushing Dry Wall Bushing Polymer wall bushing porcelain wall bushing capacitive bushing

Types of Wall Bushings

We are devoted to design the dry type wall bushing. A dry-type wall bushing is a liquid-free insulation device utilizing solid dielectric materials (e.g., epoxy resin, silicone rubber) for wall penetrations. The common voltage class is 72.5kV, 126KV, 172KV 252kV and 363kV.

There are different types of wall bushings available, each suited for specific applications.The most common types include:

A. Polymer Wall Bushings: These are versatile and durable, suitable for both indoor and outdoor use. They provide excellent insulation and can withstand high temperatures.

B. Porcelain Wall Bushings: These are widely used in commercial and industrial settings, as they offer superior strength and resistance to heat and chemicals.

Key characteristics:

1. Maintenance-free

2. Eco-friendly

3. Lightweight

Electrical Performance

Voltage rating: 12kV~252kV

Lightning impulse withstand: 75kV (12kV)/950kV (252kV)

Partial discharge: <5pC

Operating temperature: -50℃~+130℃ (special models to +180℃)

Key technical parameters
Standard	IEC 60137 - 2017
Um	kV	24	36	52	72.5	100	123	145	170	245	300	363
Maximum Rated Current	A	5000	5000	5000	4000	4000	4000	4000	31500	3150	3150	25000
Rated Frequency	Hz	50/60	50/60	50/60	50/60	50/60	50/60	50/60	50/60	50/60	50/60	50/60
Dry power frequency withstand voltage	kV	50	70	95	140	185	230	275	325	460	460	510
BIL	kV	125	170	250	325	450	550	650	750	1050	1050	1175
Temperature Range	℃	-60~55

Applications

NJREC GROUP has already exported to North America, South America, Australia, Southeast Asia, Africa, Europe and 50 other countries and regions. Transformer Bushings and Insulators manufactured by NJREC correspond to the international standards as referred to their quality and are in the market at the most competitive prices.