Constructional & Electrical Performance Data
ESI 09-6 Issue 6 Section 3 – Induced Voltage Control Cable
Type 1 |
Unarmoured Multipair Light Current Control cables. Extruded Polyvinyl Chloride sheath to BS7655. |
Type 2 |
Armoured Multipair Light Current Control cables. Extruded Polyvinyl Chloride bedding to BS7655, Galvanised steel wire armour to BS1442 and an extruded Polyvinyl Chloride sheath to BS7655. |
Type 3 |
Armoured Multipair (Generation) Light Current Control cables. Extruded Polyvinyl Chloride bedding to BS7655, Galvanised steel wire armour to BS1442 (2 – 10 pair) Galvanised steel tape armour (20 – 200 pair) and an extruded Polyvinyl Chloride sheath to BS7655. |
Alternative PVC materials producing lower levels of HCL are available on request.
Electrical Characteristics
High Voltage Test |
|
Collective screens |
2000 Volts for 1 minute between each conductors & earth 5000 Volts for 1 minute between all conductors & earth |
Cables without screen |
10 000 Volts (ac) for 1 minute between each conductor & earth 15 000 Volts (ac) for 1 minute between all conductors bunched & earth |
Conductor Resistance |
73.60Ohm/Km Loop @ 20°C (Max) |
Insulation Resistance |
80 Mohm/Km @ 20°C (Min) |
Capacitance Unbalance |
|
2 Pair above 2 Pair |
800 pF/500 mtrs @ 1 kHz (Max) 400 pF/500 mtrs @ 1 kHz (Max) |
Mutual Capacitance |
Mutual Capacitance |
Mutual Inductance |
915 μH/500 mtrs @ 1 kHz (Max) |
Cable Dimensions & Identification
Type 1 cables ( Unarmored, Induced voltages up to 5kV)
Type 2 cables (Armoured)
Type 3 cables (Generation)
Table 1 Identification of pairs
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