I. Product Overview
JY JYM/630 12kV 630A European insulation cap (with grounding wire) is a fully insulated protection component designed specifically for 12kV (compatible with 10kV systems) and 630A European-style power distribution equipment. It is mainly used for the protection of backup outgoing interfaces of European-style ring main units, cable branch boxes, and prefabricated substations.
The JY JYM-□/630 European-style insulating cap is a fully insulated, touchable protective component designed specifically for 12kV power distribution systems. It is integrally injection molded from EPDM rubber and has a built-in semi-conductive shielding layer and grounding wire. It can be directly installed on the spare outgoing interface of European-style equipment, providing insulation, dustproof, and moisture-proof protection for live spare connections. It prevents safety hazards caused by accidental contact, short circuits, and dirt accumulation, and is an essential protective component for spare circuits in power distribution systems.
II. Core Features
1. Insulation and protective properties
- Made of high-quality EPDM rubber through integral injection molding, it has excellent insulation properties and can withstand the working voltage of a 12kV system. Its power frequency withstand voltage and impact withstand voltage performance meet industry standards, providing reliable electrical insulation protection for live joints.
- With a built-in semi-conductive shielding layer and uniform electric field distribution, it eliminates the risk of partial discharge caused by electric field concentration and improves long-term operational reliability.
- With a fully sealed structure and IP67 protection rating, it can effectively prevent moisture, dust, and oil from entering, avoiding insulation degradation or short circuit faults at spare interfaces caused by dirt accumulation and moisture.
2. Installation and Safety Features
- It adopts a standard interface compatible with European-style ring main units, and can be directly plugged and unplugged into the spare outgoing interface of 630A European-style equipment. The installation is convenient and requires no special tools.
- With its own grounding wire, the insulating cap shell is reliably grounded after installation, and its surface is at ground potential, achieving the “touchable” characteristic and preventing maintenance personnel from accidentally touching live interfaces and causing electric shock risks.
- With its compact structure and small size, it is suitable for equipment with limited internal space and will not affect the operation and maintenance of other circuits after installation.
3. Environmental and Weather Resistance
- It has excellent weather resistance and can adapt to a wide temperature range of -40℃ to +90℃. The elasticity and insulation properties of the rubber do not decrease under high and low temperatures, and there is no risk of cracking, embrittlement or deformation. It is suitable for various indoor and outdoor scenarios.
- It is resistant to aging, ultraviolet rays, and ozone corrosion, with a service life of over 20 years. It requires no maintenance and reduces subsequent operation and maintenance costs.
- It is resistant to chemical corrosion and can adapt to harsh environments such as humidity, dust, salt spray, and mild acid and alkali. It has no risk of corrosion or degradation and is suitable for industrial and mining enterprises, coastal areas and other scenarios.
III. Technical Parameters
| Parameter categories | project | Technical indicators |
| Electrical parameters | Applicable system voltage | 12kV AC (compatible with 10kV power distribution systems) |
| Rated current rating | 630A (Compatible with 630A European-style device interface) | |
| Power frequency withstand voltage (5min) | 42kV, non-breakdown | |
| Impact resistance (peak) | 95kV, non-breakdown | |
| Partial discharge quantity | ≤5pC (at 1.5 times rated voltage) | |
| Structural and material parameters | Main material | Ethylene propylene diene monomer (EPDM) rubber |
| grounding device | Includes braided copper grounding wire | |
| Protection level | IP67 | |
| Interface | Standard European 630A device interface | |
| Environmental parameters | Applicable altitude | ≤2000m (Customization available for high altitudes) |
| Ambient temperature | -40℃/ +90℃ (operating temperature), -40℃/ +70℃ (storage temperature) | |
| relative humidity | ≤100% (no condensation) | |
| Implementation Standards | GB/T 12706, IEC 60840, GB/T 11022 |
IV. Scope of Application
- Applicable voltage level : 12kV AC power system (compatible with 10kV distribution system).
- Applicable scenarios :
- Protection of backup outgoing interfaces for European-style ring main units, cable branch boxes, and prefabricated substations;
- Insulation protection for live interfaces of reserved circuits in the power distribution system;
- Backup interface protection for various indoor and outdoor scenarios to prevent accidental contact, dirt accumulation, and moisture.
- Power distribution scenarios where people frequently come into contact with the equipment, and places with high safety requirements.
- Function and Purpose : Provides insulation, dustproof and moisture-proof protection for the backup live interface of 12kV/630A European equipment. At the same time, the grounding device makes the casing touchable, eliminating the risk of electric shock and short circuit during operation and maintenance, and ensuring the safe and stable operation of the power distribution system.
V. Installation and Maintenance Points
1. Installation Points
- Before installation, inspect the appearance of the insulating cap for cracks, damage, and bubbles; ensure the grounding wire is free of breaks and oxidation; and confirm that all accessories are complete and undamaged.
- Clean the spare cable outlet of the equipment, remove oil and dust, ensure the surface is dry and clean, and apply silicone grease evenly.
- Insert the insulating cap directly into the equipment interface, ensuring it is properly installed, securely connected, and without any looseness or misalignment.
- The grounding wire on the insulating cap is reliably grounded to ensure that the outer shell is at ground potential, thus achieving the “touchable” characteristic.
2. Maintenance Points
- Regularly inspect the appearance of the insulating caps, ensuring they are free from cracks, damage, discharge marks, and dirt accumulation, and that they are securely connected to the equipment interface without looseness or gaps.
- Regularly inspect the grounding wire to ensure it is free from breakage, oxidation, or loosening, and that the grounding connection is reliable.
- Clean the surface of the insulating cap to remove dust and dirt, and prevent oil and chemicals from corroding the rubber shell.
- If the insulating cap shows any abnormalities such as cracks, damage, or poor grounding, it must be replaced in time. Operation with defects is strictly prohibited.
VI. Precautions
- The product must be installed, debugged, and maintained by professionals with high-voltage electrical installation qualifications. Operation by non-professionals is strictly prohibited.
- The product must be used with the corresponding 12kV/630A European-style power distribution equipment interface. It is strictly forbidden to use the wrong equipment interface, otherwise it will lead to protection failure and cause safety accidents.
- The product must not be disassembled or modified without authorization, otherwise the warranty and safety guarantee will be lost. It is strictly forbidden to forcibly stretch or cut the insulating cap to avoid damaging the rubber material and grounding wire.
- During installation, it is essential to ensure that the insulating cap is properly installed and the grounding wire is reliably grounded; otherwise, the device will lose its “touchable” characteristic and pose a risk of electric shock.
- When storing, it should be placed in a dry, ventilated, and cool environment, avoiding direct sunlight, high temperature, humidity, and compression. It is strictly forbidden to contact with sharp objects to prevent damage to the insulating cap.
VII. Standard Configuration List
| Serial Number | name | use |
| 1 | Insulating cap body | Core protective components provide insulation, dustproof, and moisture-proof protection. |
| 2 | Braided copper grounding wire | Grounding the casing ensures safe handling. |
| 3 | silicone grease | Install lubricant and ensure tight connection. |
| 4 | Installation Instructions | Installation process guidelines |
| 5 | Product Certificate | Product quality certification documents |
Appendix: Product outline diagram
