I. Product Overview
The CH-35Q/660 (three-pass) shielded contact box adopts an epoxy resin APG pressure gel molding structure. It is a dedicated insulation connection device for KYN61 series handcart-type high-voltage switchgear of 35KV-40.5KV level. The three-way structure design can realize the connection transition of three electrical circuits. The shielded structure can effectively disperse the electric field and reduce the risk of partial discharge. It is mainly used in handcart-type switchgear of 35KV level, which plays the role of insulation isolation and multi-circuit electrical connection. It can provide effective insulation protection for the contacts inside the switchgear, adapt to more complex power distribution layout requirements, and ensure the safe and stable operation of the power system.
II. Technical Parameters
| Parameters | index |
| Rated voltage | 35KV (compatible with 40.5KV systems) |
| Rated current | 630A-1250A |
| Power frequency withstand voltage | 95KV/1min |
| Lightning impulse voltage | 185KV |
| Partial discharge index | 4.5KV≤3pc |
| glass transition temperature | ≥105℃ |
| creepage distance | >810mm |
| Installation center distance | 250mm |
| Temperature rise limit | Under rated current, the temperature rise at the outgoing terminal shall not exceed 65℃. |
| Material | Epoxy resin housing + copper alloy contacts + shielding structure |
| Center contact mounting thread | Available in M12, M16, M20, and M24 sizes, with a depth of 50mm. |
| Protection level | IP67 |
III. Scope of Application
This three-way shielded contact box is suitable for high-voltage power distribution equipment such as KYN61 series handcart-type switchgear and medium-voltage switchgear of 35KV-40.5KV level. It is commonly used in power facilities such as industrial substations, power distribution rooms of large high-rise buildings, power dispatch centers, and power distribution systems of large industrial and mining enterprises. As an insulating transition component for multi-circuit connection of high-voltage circuits, it realizes reliable connection and insulation isolation of three electrical circuits, adapts to complex power distribution layout requirements, and improves applicability in different power distribution scenarios.
IV. Usage Conditions
1. The altitude at which the installation is performed must not exceed 1000 meters;
2. The ambient air temperature is -40℃ to +40℃, and the relative humidity at 25℃ does not exceed 95%.
3. The installation site should be free from gases, vapors, dust, and other explosive and corrosive media that could seriously affect the insulation performance of the contact box;
4. It should be installed in a location free from severe vibration and impact to ensure the structural stability of the product;
5. The seismic intensity of the installation environment shall not exceed 8 degrees, and the wind speed shall not exceed 34 m/s;
6. Suitable for indoor installation and compatible with the installation layout of KYN61 series high-voltage switchgear.
V. Product Characteristics
1. Excellent insulation performance : It is molded with epoxy resin APG process, which has good insulation and sealing performance, effectively isolates high voltage circuits, prevents external dust and moisture from entering, ensures the reliability of electrical connections, and can withstand high voltage impact.
2. Strong shielding and protection : The shielded structure design can effectively disperse the electric field, reduce the risk of partial discharge, reduce electromagnetic interference, ensure the stability of electrical signal transmission, and improve the overall system safety performance.
3. Good adaptability of the three-way structure : The three-way structure design can realize the connection and transition of three electrical circuits, adapt to complex power distribution layout requirements, and meet the usage requirements of multi-circuit power distribution scenarios;
4. Stable and durable structure : The one-piece molded structure has high mechanical strength, can withstand the mechanical and electrical stress inside the switch cabinet, adapt to the complex working conditions of high-voltage power distribution systems, and has a long service life.
5. Good temperature rise control : Under the long-term operation of rated current, the temperature rise at the output end does not exceed 65℃, which can effectively ensure the safe operation of the equipment and avoid failures caused by excessive temperature rise;
6. Easy installation : Standardized installation dimensions adapt to the installation requirements of KYN61 series high-voltage switchgear, facilitating on-site installation and replacement;
7. Strong environmental adaptability : Designed with a wide temperature range, it can adapt to extreme environments of severe cold and high temperature. With an IP67 protection rating, it has good dustproof and waterproof performance and can adapt to a variety of complex power environments.
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