The 15kV 630A cable front joint is a crucial component used to connect 15kV power cables with electrical equipment, such as switchgear, transformers, and cable branching boxes. It belongs to the European-style separable connection type, and realizes the connection between single-phase or three-phase insulated cables and various equipment through a 630A prefabricated joint.
Electrical Performance Parameters
- Rated Voltage: 15kV
- Continuous Rated Current: 630A, with an overload capacity of 900A sustainable for 8 hours
- Power Frequency Wet Withstand Voltage: 42kV for 1 minute
- Power Frequency Dry Withstand Voltage: 42kV for 1 minute
- Power Frequency Long-time Withstand Voltage: 35kV for 4 hours
- Impulse Withstand Voltage: 95kV ± 10 times
- DC Withstand Voltage: 52kV for 15 minutes
- Partial Discharge: ≤ 2pc at 19kV
Product Features
- Excellent Insulation Performance: High-quality insulation materials such as silicone rubber or ethylene propylene diene monomer (EPDM) rubber are used, which have good insulation performance, corona resistance, and tracking resistance. They can effectively withstand the electric field stress under 15kV voltage, ensuring long-term stable operation.
- Full Shielding and Sealing: When matched with suitable bushings or plugs, it provides fully shielded and fully sealed separable connections, preventing the influence of external environmental factors on the internal electrical connections. It can operate for a long time underwater and under other harsh conditions.
- Reasonable Structural Design: The built-in capacitance test point is used to determine the live state of the line and must be used in conjunction with a live-line indicator. Structures such as the stress cone can effectively control the electric field distribution, evenly distribute the electric field at the cut-off of the outer shielding of the cable terminal, and release the cable stress.
- Convenient and Flexible Installation: Suitable for both indoor and outdoor installation. The installation can be vertical, horizontal, or at any angle. No special tools, tapes, or fillers are required. The cable joint can be energized immediately after being installed on the relevant components.
Product Structure
- Stud Bolts: Generally made of stainless steel to ensure a tight fit between the conductor and the bushing.
- Insulation Layer: A unique formulation and mixing technology are used to ensure the high-quality of the prefabricated insulating rubber.
- Insulator: The epoxy resin insulator contains threaded metal parts that can be closely matched with the stud bolts.
- Capacitance Test Point: Used to test whether the line is live.
- Test Point Cover: The prefabricated conductive test point cover protects the test point and grounds it during normal operation.
- Inner Semi-conductive Layer: The prefabricated conductive rubber effectively controls the electrical stress.
- Stress Cone: Stress cones of different sizes are matched with corresponding cable specifications to ensure water tightness and cable stress release.
- Grounding Eye: Prefabricated into the outer shielding layer for the connection of the grounding wire.
- Outer Semi-conductive Layer: The prefabricated conductive rubber overlaps with the cable shielding layer to make the shielding continuous and ensure that the outer semi-conductive layer is grounded.
- Crimping Terminal: Full copper or copper-aluminum crimping terminals are suitable for copper or aluminum conductors.
-
| Electrical Performance Parameter |
Value |
| Rated Voltage |
15kV |
| Continuous Rated Current |
630A, 900A overload sustainable for 8 hours |
| Power Frequency Wet Withstand Voltage |
42kV for 1 minute |
| Power Frequency Dry Withstand Voltage |
42kV for 1 minute |
| Power Frequency Long-time Withstand Voltage |
35kV for 4 hours |
| Impulse Withstand Voltage |
95kV ± 10 times |
| DC Withstand Voltage |
52kV for 15 minutes |
| Partial Discharge |
≤ 5pc at 19kV |
){kind=link}