High Current Bushing is mainly used for high voltage electrical equipment that needs to carry heavy current, such as Generator step-up (GSU) transformers, HVDC converter transformers, arc furnace transformers and High-current bus connections in gas-insulated switchgear. And its core role is to insulate and conduct current to ensure the safe transmission of the current.
High Current Bushing is mainly used for high voltage electrical equipment that needs to carry heavy current, such as Generator step-up (GSU) transformers, HVDC converter transformers, arc furnace transformers and High-current bus connections in gas-insulated switchgear. And its core role is to insulate and conduct current to ensure the safe transmission of the current.
Specification:
Key technical parameters
Standard
IEC 60137 - 2017
Um
kV
24
24
24
24
36
36
36
36
52
52
52
52
Rated Current
A
10000
16000
25000
31500
10000
16000
25000
31500
10000
16000
25000
31500
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
50/60
Dry power frequency withstand voltage
kV
55
55
55
55
77
77
77
77
105
105
105
105
BIL
kV
125
125
125
125
170
170
170
170
250
250
250
250
Temperature Range
℃
-60~55
1. Product Overview
The Heavy Current Bushing is a high-current electrical connector designed for power transmission in electrical systems, switchgear, transformers, and industrial equipment. It ensures safe and stable high-current (e.g., 60A+) transfer while providing mechanical support and insulation.
2. Key Features
(1) High Current Capacity
Rated Current: Up to 60A (varies by connection type and cooling conditions).
Contact Resistance: Ultra-low (<0.5 mΩ) to minimize energy loss.
(2) Durability & Environmental Resistance
Temperature Range: -40°C to +120°C, suitable for harsh industrial environments.
Material: Contact parts use CuCr alloy with tin plating for oxidation resistance and superior conductivity.
(3) Mechanical Design
Insertion Force: Supports top/bottom insertion; force adjustable (22N–35N) based on contact thickness (0.8–1.5 mm).
Mounting Options: Compatible with reflow soldering (PCB) or laser welding (lead frames).
(4) Insulation & Safety
High-voltage models feature epoxy resin APG technology for pollution/ moisture resistance (e.g., 12kV insulated bushings).
3. Typical Applications
Power Transmission: HV switchgear, transformer bushings.
Industrial Electronics: PCB high-current connections, lead frame welding.
Renewable Energy: PV inverters, energy storage current transfer components.
Certifications: Compliant with ISO9001 and international HV standards.
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.
