ZPAU & ZPAU-SH Main Signalling Cables (AC Electrifi ed Lines)

Application

The ZPAU & ZPAU-SH Main Signalling Cables are designed for connection between traffi c control centers and equipment shelters along the trackside. The cables are specially designed to give good induction protection (R.F= 0.26 at inductive voltage 100V/km) and are suitable for installation in intercity railways electrifi ed at 25KV ac.

Standards

● SNCF CT 445 / SNCT ST 698G
● NF F 55-698

Construction

Conductors
Solid annealed copper, 1.0/1.5 mm² nominal cross section area.

Insulation
Solid polyethylene.

Cabling Element
Each two conductors are twisted together to form a pair.

Stranding
Pairs are helically stranded in layers to form the cable core.

Core Wrapping
Plastic tape(s) with overlapping.

Inner Sheath
PE sheath. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).

Electrostatic Shield
One corrugated copper tape.

Intermediate Sheath
PE/PVC sheath. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).

Electromagnetic Shield
Two helically applied steel tapes of 0.5mm.

Outer Sheath
PE/PVC Sheath. LSZH FR option can be offered upon request to NF C 32 070.2.2 (C1).

Remarks
ZPAU: PE/PVC Sheath; ZPAU-SH: LSZH Sheath.

Electrical Characteristics at 20℃

Nominal Conductor Diameter	mm	1.13	1.38
Nominal Cross Section Area	mm²	1.0	1.5
Maximum Conductor Resistance (DC)	Ω/km	18.1	12.31
Minimum Insulation Resistance @500 V DC (3mins)	MΩ.km	5000	5000
Maximum Mutual Capacitance @1000Hz (AC)	nF/km	55	55
Maximum Capacitance Unbalance (pair to pair) @800Hz
100% cases	pF/500 m	400	400
90% cases	pF/500 m	200	200
Attenuation @45KHz	dB/km	2.5	2.5
Characteristic Impedance @45KHz	Ω	120	120
Dielectric Strength, conductor to conductor (DC voltage 3secs)	V	4500	4500
Operating Voltage (AC/DC)	V	450/750	450/750
Peak Value (AC)	V	900	900

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)

Reduction Factor

Inductive Voltage (V/km) Em	28	32	37	42	47	50	70	80	100	120	170	225
Reduction Factor @50Hz Rk	0.75	0.70	0.60	0.50	0.40	0.35	0.30	0.28	0.26	0.25	0.24	0.25

Dimensions And Weight

Cable Code	No. of Pairs	Nominal Sheath Thickness mm			Nominal Overall Diameter mm	Nominal Weight kg/km
		Inner	Interm.	Outer
1.13mm Conductor, 2.3mm Insulated Wire
RS/ZPAU-2Y2Y(K)2YB2Y-1P1S	1	1.0	0.8	1.6	16.2	490
RS/ZPAU-2Y2Y(K)2YB2Y-2P1S	2	1.0	0.8	1.6	17.0	550
RS/ZPAU-2Y2Y(K)2YB2Y-3P1S	3	1.0	0.8	1.6	22.2	820
RS/ZPAU-2Y2Y(K)2YB2Y-4P1S	4	1.0	0.8	1.6	23.8	890
RS/ZPAU-2Y2Y(K)2YB2Y-7P1S	7	1.0	0.8	1.7	26.7	1080
RS/ZPAU-2Y2Y(K)2YB2Y-14P1S	14	1.2	0.8	1.8	32.3	1560
RS/ZPAU-2Y2Y(K)2YB2Y-21P1S	21	1.2	1.1	2.0	37.2	1990
RS/ZPAU-2Y2Y(K)2YB2Y-28P1S	28	1.2	1.1	2.2	41.4	2380
RS/ZPAU-2Y2Y(K)2YB2Y-56P1S	56	1.3	1.3	2.5	52.9	3700
1.38mm Conductor, 2.55mm Insulated Wire
RS/ZPAU-2Y2Y(K)2YB2Y-14P1.5S	14	1.2	0.8	1.8	35.0	2050
RS/ZPAU-2Y2Y(K)2YB2Y-21P1.5S	21	1.2	1.1	2.0	39.5	2525