Heat Shrink Medium Voltage Joints
Medium Voltage Heat Shrink Joints-Conventional and next generation. Raychem developed highly specialized polymers for heat shrink joints suitable for plastic and paper cables upto 36 kV. For transition joints, a special oil barrier tubing is used to transform draining oil (MI) and non-draining oil (MIND) paper insulated cable into quasi-polymeric insulated cable with a radial field.
The conventional design developed in 1980 was based on multiple layer tubing concept providing insulation and stress functions. The latest developed heat shrink joint is a single tubing (triple layer co-extruded) of adequate thickness which provides insulation for a particular voltage range.
- Conventional Joints – Multi-layered heat-shrinkable tubing incorporating precisely engineered impedance stress control. EPKJ universal joints are suitable for a wide range of connectors and cable sizes with no limitations on shelf life
- Joints are suitable for all types of cables having different screening and armour designs
- Immediate energization after completion of joints
- Conforms to various national and international standards like CENELEC HD.629.1.S2:2006, IEC 60502-4, IEEE 48 and IS 13573-2
- Next Gen Joints – Triple layer co-extruded single heat-shrinkable tubing incorporating precisely engineered impedance stress control. MXSU joints are supplied with mechanical phase and screen connectors for a wide range of conductor sizes with no limitat
- Joints are suitable for all types of cables having different screening and armour designs
- Immediate energization after completion of joints
- Conforms to various national and international standards like CENELEC HD.629.1.S2:2006, IEC 60502-4, IEEE 48 and IS 13573-2
Specifications
| Parameter |
|---|
| Unlimited shelf life for heat shrink components |
| Suitable for wide range of connectors |
| Immediate energization |
| Pre-Engineered Kit |
| Tested as per National & International Standards |
Technical Information
| Sr. No. | Particulars | 7.2 KV | 12 KV | 24 KV | 36 KV |
|---|---|---|---|---|---|
| 1. | Applicable Standards | IEC 60502-4, CENELEC HD 629.1, IS 13573-2 | |||
| 2. | Rated Voltage of cable accessories | 3.8/6.6 (7.2) | 6.35/11 (12) | 12.7/22 (24) | 19/33 (36) |
| 3. | Brand | Raychem-RPG | Raychem-RPG | Raychem-RPG | Raychem- RPG |
| 4. | Accessories | Heat Shrink type | |||
| 5. | AC Voltage test
Dry for 5 minutes Wet for 1 minute |
17.1 kV
15.2 kV |
28.5 kV
25.4 kV |
57.1 kV
50.8 kV |
85.5 kV
76 kV |
| 6. | DC Voltage test for 15 min | 15.2 kV | 25.4 kV | 50.8 kV | 76 kV |
| 7. | Partial Discharge at 1.73U0 | Less than 10 pC | |||
| 8. | Impulse Voltage at ambient & elevated temp | 60 kVp | 75 kVp | 125 kVp | 170 kVp |
| 9. | Load Cycle test | 60 cycles in air & water | |||
| a. | Each cycle heating duration | 5 hours | |||
| b. | Temperature | 95 – 100° C | |||
| c. | Cooling Duration | 3 hours | |||
| d. | Voltage withstand | 9.5 kV | 15.8 kV | 31.7 kV | 47.5 kV |
| 10. | Humidity Test for 300 hrs. | 4.7 kV | 7.93 kV | 15.8 kV | 23.7 kV |
| 11. | Salt fog test for 1000 hrs. | 4.7 kV | 7.93 kV | 15.8 kV | 23.7 kV |
| 12. | Method of Stress Control | Resistive based
(ZnO based available in termination on req.) |
|||
| 13. | Tubing & Molded parts | Heat Shrinkable type | |||
| 14. | Non-tracking material | As per ASTM D-2303 | |||
| 15. | Di-electric strength of insulating material | 10 kV/mm minimum | |||
