HV Cable Terminations – Heat Shrink Terminations 11kV 33kV High Voltage Cables

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HV Cable Terminations

Cable Terminations | 11kV 33kV | Medium & High Voltage Cables MV HV | Heat Shrink

Thorne & Derrick distribute HV Cable Terminations for 6.6kV 11kV 33kV high voltage cables – we provide competitive prices for indoor and outdoor heat shrink terminations for HV cables from extensive stocks to UK and international destinations.

HV cable terminations suit single and 3 core medium/high voltage cables with XLPE, EPR or PILC insulation operating at 6.6kV, 11kV and up to 33kV – cable terminations are complete with components including screen earth kit (copper tape screen cables), cable glands (bolt-on, compression or heat shrink type for armoured cables), insulating bushing boots and either crimp or mechanical shearbolt cable lugs.

Cable terminations are designed to terminate and connect 11kV/33kV cables into medium or high voltage electrical equipment including switchgear, transformer, motor, enclosure or pole-top mounted for overhead line distribution networks.

  • Voltages: 6.6kV 11kV 15kV 24kV 33kV 36kV
  • Cable Type: Single & 3 Cores (Copper/Aluminium Conductors 16sqmm-1000sqmm)
  • Cable Insulation: Polymeric (XLPE EPR) & Paper (PILC)
  • Location: Indoor & Outdoors

Cable Terminations

Heat shrink cable terminations are suitable for Indoor and Outdoor connection of MV HV Power Cables – to clarify indoor terminations include cables terminated into substation switchgear and transformers and air insulated type cable boxes. Where cable terminations are connected to overhead line equipment and mounted pole-top an outdoor cable termination with rain sheds should be used.

Terminations are suitable for all climates, areas and environments including heavy polluted and hazardous areas where “hot-working” permits can issued – the cable terminations provide non-tracking stress control connections for MV HV cables with water, UV, erosion and corrosion resistant performance. Dry type terminations do not require oil or compound filling – the insulation and non-tracking tubes provide effective high voltage termination of XLPE, EPR and PILC insulated cables.

For medium/high voltage cable installations where “hot-working” is not permitted due to the presence of flammable gases in potentially explosive atmospheres cold shrink terminations can be supplied which do not require naked flame or heat source to install.

Cable Terminations

Minimum Air Clearances for HV Terminations in Cable Boxes in Accordance with BS 164 Class A
Maximum System Voltage, Phase to Phase (kV) 6.6kV 7.2kV 11kV 12kV 24kV 33kV 36kV
Minimum Air Clearance Between Live Metal ‘A’ (mm) 90 127 242 356
Minimum Air Clearance Between Live Metal and Earth ‘B’ (mm) 65 75 140 222

 

Minimum Air Clearances for HV Terminations in Cable Boxes in Accordance with BS 164 Class A with Bushing Boots Fitted
Maximum System Voltage, Phase to Phase (kV) 6.6kV 7.2kV 11kV 12kV 24kV 33kV 36kV
Minimum Air Clearance Between Live Metal ‘A’ (mm) 45 75 100 125
Minimum Air Clearance Between Live Metal and Earth ‘B’ (mm) 32 60 75 100

 

Minimum Clearance Between Cores and Between Cores and Earth
Maximum System Voltage, Phase to Phase (kV) 6.6kV 7.2kV 11kV 12kV 24kV 33kV 36kV
Minimum Clearance ‘C’ (mm) Measured From Top of Heat Shrink Stress Control Tubes 15 20 40 50

 

Minimum Clearance Between Top of The Stress Control Heat Shrink Tubing and Base of the Cable Lug
Maximum System Voltage, Phase to Phase (kV) 6.6kV 7.2kV 11kV 12kV 24kV 33kV 36kV
Minimum Clearance ‘D’ (mm) 30 50 95 250

➡ See 11kV 33kV Cable Lugs

Impulse Voltage Withstand for Indoor HV Terminations, Installed With Bushing Boots, on Bushings in Accordance with BS2562
Maximum System Voltage, Phase to Phase (kV) 6.6kV 7.2kV 11kV 12kV 24kV 33kV 36kV
Impulse Withstand Voltage (kV) 75 95 125 170

 

 

Cable Terminations

Summary of Cable Termination Test Voltages

Cable terminations manufactured by SPS are tested and qualified as outlined in Cenelec standards HD 628 S1 and 629.1 S2 : 2006. This testing criteria encompasses VDE0279 and IEC60502 and following voltage classes for HV Terminations : 3.8/6.6 (7.2kV), 6.35/11 (12kV), 8.7/15 (17.5kV), 12.7/22 (24kV) and 19/33 (36kV).

Test Test Voltage Rated Voltages U0 1U (Um) kV
3.8/6.6 (7.2) 6.35/11 (12) 8.7/15 (17.5) 12.7/22 (24) 19/33 (36)
Humidity 1.25 U0 5 8 11 16 24
Partial Discharge 1.73 U0 6.5 11 15 22 33
2 U0 7.5 12.5 17.5 25 38
Heating Cycle Voltage & AC Voltage / 15 min & 500 hrs 2.5 U0 9.5 16 23 32 47.5
AC Voltage / 1 Min 4 U0 15 25.5 35 51 76
AC Voltage / 5 Min 4.5 U0 17 28.5 39 57 85.5
DC Voltage / 15 Min 6 U0 23 38 52 76 114
Impulse (Peak) 60 95 95 125 194

Test Sequence & Requirements

Test Test Clause of EN 61442 Test Sequence Test Requirements
A1 A2 A3
1 DC Voltage Dry 5 X X 15 min at 6U0 no breakdown of flashover
2 AC Voltage Dry 4 X X 5 min at 4.5 Uno breakdown of flashover
3 Partial Discharge At Ambient Temperature 7 X Max 10p C at 1.73U0
4 Impulse Voltage At Elevated Temperature 6 X 10 impulses of each polarity, no breakdown or flashover
5 Heating Cycle Voltage In Air 9 X 126 cycles at 2.5U0 no breakdown or flashover for terminations and 63 cycles in water for joints
6 Partial Discharge At Elevated & Ambient Temperature  7 X Max 10C at 1.73U0
7 Thermal Short Circuit (Screen) 10 X 2 short circuits at 1sc no breakdown
8 Thermal Short Circuit (Conductor) 11 X 2 short circuits to raise conductor to 6sc of the cable, no breakdown
9 Dynamic Short Circuit 12 X 1 short circuit at 1d no breakdown
10 Impulse Voltage At Ambient Temperature 6 X X 10 impulses of each polarity, no breakdown or flashover
11 AC Voltage Dry 4 X X 15 min at 2.5U0 no breakdown or flashover
12 Humidity 13 X 300 hrs duration at 1.25U0
13 Examination X X X For information

 

See: HV Cable Joints – Heat Shrink 6.6kV 11kV 33kV High Voltage Cables

 ➡ Should you require customer service or technical support please contact us – view the full range of HV Cable Terminations below.

Heat Shrink Cable Terminations 6.6kV 11kV 33kV

HV Joints & Terminations | High Voltage Cables