Instrument Cable Constructional Specificationsrolliflex

S.No. Part Type Range/Spec.
1 Conductor (Copper)
As per IS 8130 /
IEC 60228
Stranded Conductor (ABC/ATC)
(Class-II)
0.50sqmm (7/0.30mm)
0.75sqmm (7/0.37mm)
1.00sqmm (7/0.43mm)
1.50sqmm (7/0.53mm)
2.50sqmm (7/0.67mm)
Flexible Conductor (ABC/ATC)
(Class V)
0.50sqmm (16/0 .20mm)
0.75sqmm (24/0.20mm)
1.00sqmm (32/0.20mm)
1.50sqmm (48/0.20mm)
2.50sqmm (80/0.20mm)
2. Core Insulation PVC Type A- 70°C Standard Insulation Thickness: 0.60mm
PVC Type C-85°C Colour code as per BS 5308/1S-15541
or as per customer requirements.
PVC Type C-1 05°C
LOPE Insulation
Any other grade as per customer requirement.
3. Units Core Colour code as per BS 5308/IS-1 554-I
Pair or as per customer requirements.
Triad Twisting:
Minimum 12 crossover Twists/meter
Quad
4. Unit Screen 1 layer of polyster tape Polyster tape 25 micron thick
1 tinned copper drain wire 0.50sqmm ATC
1 Layer of Aluminium backed myler
tape with 25% overlap for 100% coverage.
Al. Myler tape 25micron thick

1 Layer of Polyster Tape. Polyster tape 25 micron thick
5. Number of Units Single Unit
Multi Unit
6. Communication Pair 0.50sqmm ABC insulated, Twisted Iiiir Provided for cables with 6
Pairs/6Triads/6Quads and above.
7. Overall Screen Same as for Unit screen (Cl. 4)
8. Inner sheath PVC Type ST-1 70°C Standard Thickness: 0.80mm
PVC Type ST2 -85°C FR Colour code: Black.
PVC Type FRLS
9. Armour Galvanised round GI wire Standard size: 0.90 mm ,1.40 mm

(as per customer requirement )
Galvanised Flat GI Strips 4 x 0.80 mm
10 Outer Sheath PVC Type ST-1 70°C Thickness as per BS- 5308,
PVC Type 8T2 -85°C FR IS-1554 P(i)
PVC Type FRLS As per customer requirement

Electrical Charactristics For Instrumentation Cables

Conductor
Size
Resistance
at 20ºC
Mutual Capacitance (PE) Mutual Capacitance
(PVC)
Inductance L/R
Ratio
Core to Core Core to
Screen
Core to
Core
Core to
Screen
   
Sqmm Ù/Km pF/mtr pF/mtr pF/mtr pF/mtr μH μH/Ù
Stranded
0.50 36.8 75 115 250 400 1.20 25
0.75 25.0 75 115 250 400 1.20 25
1.00 18.4 75 115 250 400 1.20 25
1.50 12.3 85 120 250 400 1.20 40
2.50 7.56 85 120 250 400 1.20 70
Flexible
0.50 39.7 75 115 250 400 1.20 25
0.75 26.7 75 115 250 400 1.20 25
1.00 19.7 75 115 250 400 1.20 25
1.50 13.5 85 120 250 400 1.20 40
2.50 8.21 85 120 250 400 1.20 70

Maximum Operating Temperature: 70ºC

(After Insulation)

Test Voltage

Core To Core : 1000V AC (r.m.s.) For 1 Minute.
Core To Screen : 500V AC (r.m.s.) For 1 Minute.

Insulation Resistance of conductor
at ambient Temperature

PE : >5G ohm/Km
PVC : >25 Mohm/Km

Insulation Resistance of Screen at ambient Temperature

PE/PVC : > 1 Mohm/Km