Single-Phase AC Electric Railway 27.5kV XLPE Insulated Power Cable

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This single-phase AC electric railway 27.5kV XLPE insulated power cable conforms to the standards of TB/T 2822-1997 as well as Q/321011 KLA32-2010, and it is applied for places with single phase, AC, power frequency, and rated voltage of 27.5kV, such as power line for electric railway, power line for auto-transformer, feeder lines of traction substation, partition station, switching station and auto-transformer, etc.

Max. Allowable Short Circuit Current

Nominal Cross Section (mm2)	150	185	240	300	400
Max. Allowable Short Circuit Current (kA)	21.4	26.4	34.3	42.9	57.2

Note: The short circuit lasts for 1 second, and the starting temperature is 90℃.

Code Explanations

Product Code	TD	PE inner sheath (isolation unit)	Y
Low-halogen low-smoke	DD	Non-magnetic metal armoring	7
Halogen free low smoke	WD	Outer sheath
Copper conductor	(T) Omitted	PVC-based low halogen low smoke flame retardant outer sheath	2
XLPE insulation	YJ	PE-based halogen free low smoke flame retardant outer sheath	3

Model Descriptions

Model	Descriptions
TDDD-YJY72	Cu core XLPE insulated aluminum wire armored low halogen low smoke flame retardant PVC sheathed power cable
TDWD-YJY73	Cu core XLPE insulated aluminum wire armored halogen free low smoke flame retardant PE sheathed power cable

Specifications

Model	No. of Core	Rated Voltage (kV)	Preferred Conductor Cross Section Area (mm2)
TDDD-YJY72 TDWD-YJY73	1	27.5	150, 185, 240, 300, 400

Note: Other specifications are also available upon request.

Qualifications

No.	Item	Unit	Standard Value
1	DC resistance of conductor	Ω/km	GB/T 3956
2	Partial discharge test at 1.73U0	pC	≤10
3	5min AC voltage test	kV	97
4	Cable sheath electrical test	kV	15
5	Hot set test (200℃, 15min, 20N/cm) elongation / permanent elongation	%	≤175 / ≤15
6	Bending test and subsequent partial discharge test	pC	≤5
7	Tan delta test		≤10×10-4
8	Thermal cycling test and subsequent partial discharge test	pC	≤5
9	Impulse voltage test and subsequent AC voltage test	pC	≤5
10	4h voltage test	kV	110

Structural Parameters

Model	Specification	Nominal Insulation Thickness (mm)	Outer Diameter (mm)	Theoretical Weight (kg/km)
TDDD-YJY72 TDWD-YJY73	1×150	12	61.4	4441
	1×185	12	63.2	4896
	1×240	12	65.8	5590
	1×300	12	67.9	6413
	1×400	12	71	7549

Working Condition
1. Max. working temperature of conductor: 90℃
2. Max. temperature of conductor during short circuit: 250℃. The short circuit should lasts less than 5 seconds.
3. Min. ambient temperature when laying: 0℃
4. Min. bending radius: 15 times of cable overall diameter
5. This single-phase AC power cable is suitable for direct burying, and it can be installed in pipeline, cable duct, underground tunnel, etc. In addition, partially laying in the open air is also acceptable, and our product can be immersed in water frequently or periodically.

Single-Phase AC Electric Railway 27.5kV XLPE Insulated Power Cable

Related Names
Railway Power Supply Cable Manufacturer | Outdoor Electric Cable Installation | Halogen Free Wiring

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