ZCO3 & ZCO3-SH Main Signalling Cables (AC Electrified High Speed Lines)

Application

The cables are designed for connection between traffic control centers and equipment shelters along the trackside. The cables are specially designed to give good induction protection (R.F=0.21 at inductive voltage 100V/km) and are suitable for installation in high speed railway lines electrifi ed at 25KV ac.

Standard

• SNCF CT 445
• NF F 55-698

Cable Construction

• Conductors: Solid annealed copper, 1.0 mm nominal cross section area.
• Insulation: Solid polyethylene.
• Cabling Element: Four conductors are twisted to form a quad.
• Stranding: Quads are helically stranded to get the cable core.
• Core Wrapping: Plastic tape(s) with overlapping.
• Inner Sheath: Low density polyethylene. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).
• Electrostatic Shield: Corrugated copper tape.
• Intermediate Sheath: Low density polyethylene. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).
• Electromagnetic Shield: Two helically applied steel tapes (0.5mm).
• Outer Sheath: PE/PVC compound. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).
• Remarks: ZCO3: PE/PVC Sheath; ZCO3-SH: LSZH Sheath.

Electrical Characteristics at 20℃

Nominal Conductor Diameter	mm	1.13
Nominal Cross Section Area	mm	1.0
Maximum Conductor Resistance (DC)	Ω/km	18.1
Minimum Insulation Resistance @500 V DC (3mins)	MΩ.km	5000
Maximum Mutual Capacitance @1000Hz (AC)	nF/km	40
Maximum Capacitance Unbalance @800Hz	pF/500m	400
Dielectric Strength, conductor to conductor (DC voltage 3mins)	V	4500
Operating Voltage AC/DC	V	450/750

Reduction Factor

Inductive voltage(V/km)	50	70	100	370	400	470
Reduction factor @50Hz	0.42	0.30	0.20	0.16	0.18	0.31

Mechanical and Thermal Properties

• Minimum Bending Radius: 8×OD (static); 16×OD (dynamic)
• Temperature Range: -40℃ to +70℃ (during operation); -20℃ to +50℃ (during installation)

Dimensions and Weight

Cable Code	No. of Quads	Nominal Sheath Thickness mm			Nominal Overall Diameter mm	Nominal Weight kg/km
		Inner	Interm.	Outer
1.13mm Conductor, 2.33 Insulated Wire
RS/ZCO3-2Y2Y(K)2YB2Y-2Q1S	2	0.8	1.0	1.6	27.0	1295
RS/ZCO3-2Y2Y(K)2YB2Y-4Q1S	4	0.8	1.0	1.6	29.5	1490