40.5kV Porcelain Housed Rod Type Bushing

Our CBRG-40.5 series dry-type capacitive porcelain bushings feature through-rod construction with excellent electrical performance and mechanical strength, designed for 40.5kV power systems in harsh outdoor environments.

• Rated voltage 40.5kV with current options from 630A to 4000A; creepage distance 1256mm ensures reliable performance under severe pollution conditions.

• Partial discharge ≤10pC at 1.5 Um/√3 kV; dielectric dissipation factor ≤0.5%; power frequency withstand 95kV; lightning impulse withstand 200kV.

• Copper tin-plated terminals provide low contact resistance; suitable for altitudes up to 1000m.

• Compliant with IEC 60137; ideal for power transformers, GIS, switchgear, and renewable energy plants.

• Fast delivery, reliable quality, responsive service, and extensive project experience backed by our company.

CBRG-40.5 Series Dry-Type Capacitive Porcelain-Insulated Transformer Bushing (Through-Rod Type)

The CBRG-40.5 series is a high-performance dry-type capacitive transformer bushing designed for 40.5kV power systems, featuring a through-rod construction and porcelain external insulation. It offers excellent electrical performance, mechanical strength, and long-term reliability in harsh outdoor environments.
With a unified creepage distance of 1256 mm and an altitude suitability of up to 1000 m, this series is designed to withstand severe pollution and climatic conditions. Each bushing is tested to ensure a power frequency withstand voltage of 95 kV and a lightning impulse withstand voltage of 200 kV. Partial discharge is maintained below 10 pC at 1.5 Um/√3 kV, and the dielectric dissipation factor (tanδ) is kept within a stable and low range, ensuring operational safety and system stability.
Available in multiple current ratings from 630 A to 4000 A, the CBRG-40.5 series is suitable for a wide range of high-voltage applications, including power transformers, GIS, switchgear, and renewable energy plants. It provides a compact, easy-to-install, and maintenance-free solution for high-voltage connections.
Compliant with relevant national standards and industry specifications, the CBRG-40.5 series is a reliable choice for substation upgrades, power equipment retrofits, and transmission and distribution system projects.

Model	CBRG-40.5/630	CBRG-40.5/1250	CBRG-40.5/1600	CBRG-40.5/2000	CBRG-40.5/2500	CBRG-40.5/3150	CBRG-40.5/4000
Rated Voltage Ur (kV)	40.5	40.5	40.5	40.5	40.5	40.5	40.5
Rated Current Ir (A)	630	1250	1600	2000	2500	3150	4000
Creepage Distance (mm)	1256	1256	1256	1256	1256	1256	1256
Altitude (m)	1000	1000	1000	1000	1000	1000	1000
Dielectric Dissipation Factor (tanδ)	≤0.5%	≤0.5%	≤0.5%	≤0.5%	≤0.5%	≤0.5%	≤0.5%
External Insulation Material	Porcelain	Porcelain	Porcelain	Porcelain	Porcelain	Porcelain	Porcelain
Partial Discharge at 1.5 Um / √3 kV (pC)	≤10	≤10	≤10	≤10	≤10	≤10	≤10
Color	Brown	Brown	Brown	Brown	Brown	Brown	Brown
Power Frequency Withstand Voltage (kV)	95	95	95	95	95	95	95
Lightning Impulse Withstand Voltage (kV)	200	200	200	200	200	200	200
Terminal Material	Copper tin plating	Copper tin plating	Copper tin plating	Copper tin plating	Copper tin plating	Copper tin plating	Copper tin plating
Applicable Standard	IEC 60137	IEC 60137	IEC 60137	IEC 60137	IEC 60137	IEC 60137	IEC 60137
Mounting Height (Center-to-Center)	1225±20	1250±20	1250±20	1250±20	1275±20	1335±20	1320±20

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