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Special cable accessories for 27.5kV railway electrification

Special cable accessories for 27.5kV railway electrification

Excellent insulation, weather resistance, high elasticity, and sealing follow-up performance. After installation, the product maintains close contact with the cable body interface at all times, effectively preventing moisture ingress and ensuring safe and reliable operation.

model:

Commodity name： Special cable accessories for 27.5kV railway electrification

Category:

Cold shrink cable accessories

Email:

laicaieven@gmail.com

Phone:

+86 17710715268

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Special cable accessories for 27.5kV railway electrification

Product characteristic

Resistant to pollution, aging, and with superior hydrophobic properties, the product exhibits excellent cold and heat resistance, making it particularly suitable for harsh environments such as high-altitude cold regions, humid areas, salt fog zones, and heavily polluted areas.

Ideal for multi-circuit parallel power supplies and compact switchgear, providing broad, safe, and reliable protection for power grids.

Easy Installation: All products are pre-molded in the factory, requiring no special skills training for installation. Simply follow the product installation manual for a quick and effortless setup.

Fields of application

The silicone rubber cable accessories are developed using advanced cold-shrink pre-expansion technology, imported state-of-the-art equipment, and improved liquid silicone rubber formulations. The product offers outstanding insulation and high elasticity, with a single specification suitable for multiple cable diameters. Installation requires no flame, significantly simplifying the traditional construction process for cable terminations and joints.

27.5kV cold-shrinkable accessories for railways

Product model description

27.5kV Cold-Shrink Termination Kits for Railway Electrification

27.5kV Cold-Shrink Straight Joints for Railway Electrification

Product specification

Model	Description	Applicable Cable Cross-Section（mm2）
27.5kVZLT-1/1	27.5kV Railway Electrification Cold-Shrink Terminal	50-95
27.5kVZLT-1/2		120-185
27.5kVZLT-1/3		240-400
27.5kVZTJ-1/1	27.5kV Railway Electrification Cold-Shrink Joint	50-95
27.5kVZTJ-1/2		120-185
27.5kVZTJ-1/3		240-400

27.5kV cable accessories for railways

Product introduction

Railway-Specific Prefabricated Cable Accessories are specially designed for 27.5kV single-phase XLPE-insulated cables in electrified railway systems. The terminal features a creepage distance of 1450mm and is compatible with cable cross-sections ranging from 95mm² to 400mm².

Operating conditions

Altitude: <4000 meters
Ambient temperature: maximum: +70℃ minimum: -50℃

System conditions

Maximum System Operating Voltage: 55 kV
Rated System Voltage: 27.5 kV (Uo)

Main technical parameters

Item	Test Item	Standard Requirement	Test Results	Conclusion
Prefabricated Termination for 27.5kV Electrified Railway	Power Frequency Withstand Voltage Test	124 kV, 5 min (no flashover or breakdown)	124 kV, 5 min (no breakdown or flashover in all assembled samples)	Pass
	Wet Power Frequency Withstand Voltage Test	110 kV, 1 min (no breakdown or flashover)	110 kV, 1 min (no breakdown or flashover in all assembled samples)	Pass
	Partial Discharge Test at Room Temperature	≤5 pC at 48 kV	48 kV (background noise: 1.7 pC), all phases ≤1.7 pC	Pass
	Impulse Voltage Test at High Temperature	±250 kV, 10 shots each polarity (no breakdown or flashover)	±250 kV, 10 shots each polarity (no breakdown or flashover in all assembled samples)	Pass
	Load Cycle Test with Constant Voltage in Air	69 kV with conductor heated to 90-100°C, 60 cycles (no breakdown or flashover)	69 kV with conductor at 90-100°C, 60 cycles (no breakdown or flashover in all assembled samples)	Pass

Keywords:

27.5kV Cold-Shrink Cable Accessories

Railway Electrification Cable Terminals

Cold-Shrink Cable Joints for Railways

27.5kV Railway Cable Accessories

Cold-Shrink Terminals for Overhead Catenary

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