126kV Porcelain Housed Rod Type Bushing

Our CBRG/CBRGL series porcelain housed rod type bushings feature fully sealed, maintenance-free dry-type capacitive cores with high-strength porcelain external insulation, designed for 126kV power transformers, reactors, and GIS applications.

• Rated voltage 126kV with current options from 630A to 2500A; creepage distance up to 3966mm ensures superior insulation performance.

• Partial discharge ≤10pC at 1.5 Um/√3 kV; power frequency withstand 255kV; lightning impulse withstand 550kV for exceptional reliability.

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

• Compliant with IEC 60137; excellent mechanical strength and long-term operational reliability.

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

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Product Series and Overview

This product series comprises the CBRG and CBRGL sub‑series, designed specifically for 126kV electrical equipment such as power transformers, reactors, and Gas Insulated Switchgear (GIS). It provides reliable insulation and mechanical support for current‑carrying conductors passing through grounded metal enclosures. The product features a fully sealed, maintenance‑free dry‑type capacitive core, with high‑strength porcelain as the external insulating housing, offering excellent electrical performance, mechanical robustness, and long‑term operational reliability.

Technical Specifications

Model	CBRG-126/630	CBRG-126/1250	CBRG-126/1600	CBRG-126/2000	CBRG-126/2500
Rated Voltage (Ur)	126 kV	126 kV	126 kV	126 kV	126 kV
Rated Current (Ir)	630 A	1250 A	1600 A	2000 A	2500 A
Creepage Distance	3960 mm	3906 mm	3906 mm	3906 mm	3906 mm
Altitude	1000 m	1000 m	1000 m	1000 m	1000 m
Dielectric Dissipation Factor (tan δ)	>0.5%	±0.5%	>0.5%	±0.5%	>0.5%
External Insulation Material	Porcelain	Porcelain	Porcelain	Porcelain	Porcelain
Partial Discharge (at 1.5Um/√3)	≤10 pC	≤10 pC	≤10 pC	≤10 pC	≤10 pC
Color	Brown	Brown	Brown	Brown	Brown
Power Frequency Withstand Voltage	255 kV	255 kV	255 kV	255 kV	255 kV
Standard Compliance	IEC 60137	IEC 60137	IEC 60137	IEC 60137	IEC 60137
Lightning Impulse Withstand Voltage	550 kV	550 kV	550 kV	550 kV	550 kV
Terminal Material	Tin-plated copper	Tin-plated copper	Tin-plated copper	Tin-plated copper	Tin-plated copper

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126kV Composite Housed Cable Entry Type Bushing

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