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KYN28-3.3
KYN28-3.3 Indoor Metal – Clad Withdrawable Switchgear
The 3.3kV indoor metal armored movable switchgear is a core distribution equipment designed specifically for the end of medium and low voltage distribution networks and small industrial scenarios, in compliance with GB/T 3906-2020 and IEC 62271-200 standards. The equipment adopts a fully metal armored structure, which encapsulates components such as circuit breakers, isolating switches, and transformers in different zones. It has the characteristics of compact size and high protection level (IP4X and above), which can achieve safe distribution, control, and fault removal of electrical energy. It is suitable for frequent start stop and low load fluctuation distribution scenarios, providing reliable guarantee for stable operation of the equipment.
Features
1. Compact design, suitable for small spaces:
Compared to products with higher voltage levels, the cabinet width can be controlled within 800mm and the depth optimized to 1800mm, without occupying a large amount of indoor space, especially suitable for space limited scenarios such as old factory renovation and small data centers.
2. Precise protection, suitable for end loads:
Equipped with specialized miniaturized vacuum circuit breakers, the short-circuit breaking capacity can reach 25kA-31.5kA, which can accurately match the protection needs of end loads such as motors and lighting, avoiding overprotection or insufficient protection problems.
3. Convenient operation and maintenance, reducing labor costs:
The portable circuit breaker handcart adopts a guide rail design, which is easy to push and pull, and can achieve load insertion and offline maintenance. Daily inspections do not require dismantling the cabinet, and the operation and maintenance efficiency is improved by more than 40%.
4. Low energy consumption and significant long-term benefits:
The cabinet adopts high-quality cold-rolled steel plates and sealing technology to reduce heat dissipation losses. Low loss transformers are selected for internal components, and the overall no-load loss is reduced by 15% compared to traditional products. Long term operation can significantly save electricity expenses.
This product can customize handcart types (circuit breaker handcart, metering handcart, isolation handcart) according to user needs, support docking with intelligent distribution systems, and achieve telemetry, remote signaling, and remote control functions; The protection level can be upgraded to IP54, suitable for harsh indoor environments such as humidity and dust; Available in RAL7035 (light gray) and RAL7032 (blue gray) colors to meet the decoration needs of different scenes.
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Specification
| PROJECT | UNIT | DATA | |
| Rated voltage | kV | 3.3 | |
| Rated frequency | Hz | 50 | |
| The rated current of the main bus | A | 630/1250 | |
| Current rating | A | 630/1250 | |
| Ground Loop Rated Short-Time Withstand Current (2S) | kA | 31.5 | |
| Rated short-time withstand current of the main circuit (4S) | kA | 25/31.5 | |
| Rated peak withstand current (peak) | kA | 63/80 | |
| Rated short-circuit interrupting current | kA | 25/31.5 | |
| Rated insulation level | 1-minute power frequency withstand voltage | kV | intermittent to the ground: 10 |
| Fracture: 12 | |||
| Withstand voltage for lightning impulses | kV | intermittent to the ground: 20 | |
| Fracture: 23 | |||
| Ingress protection | The shell is IP4X | ||
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FAQs
Can the 3.3kV switchgear be adapted to outdoor temporary power distribution scenarios?
Cannot. This product is an indoor specialized equipment, and its protection level and sealing design are only suitable for indoor environments. Outdoor use may cause component failures due to rain, snow, and dust intrusion. If outdoor power distribution is required, a dedicated outdoor switchgear can be selected.
How to ensure that the handcart is installed properly after maintenance?
The cabinet is equipped with a mechanical interlocking device, which prevents the closing operation when the handcart is not fully pushed into place; At the same time, there is a position indicator switch that can provide real-time feedback on the status of the handcart’s “working position”, “test position”, and “maintenance position” to avoid misoperation.
What is the typical lifespan of a product?
Under normal use and regular maintenance, the service life of the cabinet can reach 20 years, and the service life of core components such as internal circuit breakers is 10-15 years. Core components can be replaced in advance according to operating conditions to extend the overall service life of the equipment.
Can it be compatible with the old version 3.3kV distribution system?
Compatible. When designing the product, the wiring interfaces and installation dimensions of the old version system are reserved. By checking the parameters such as rated current and breaking capacity to match, the old equipment can be directly replaced without the need to modify the distribution circuit.
Related Applications
Small manufacturing plants: Suitable for the power distribution needs of small plants such as mechanical processing and light industry textile, providing stable power supply for CNC machine tools, textile machinery and other equipment, and can cope with small load fluctuations caused by equipment start and stop, ensuring production continuity.
Auxiliary facilities of commercial complexes: Used for power distribution of underground garages, equipment rooms, logistics areas, and other auxiliary facilities of commercial complexes. With a compact volume, it can be flexibly arranged in small computer rooms to accurately protect end devices such as ventilation, drainage, and lighting.
Small data center: It provides power distribution support for edge computing nodes, UPS equipment in small data rooms, and server clusters. The low loss design can reduce the heat dissipation pressure of computer rooms. The intelligent docking function is convenient for operation and maintenance personnel to monitor the power distribution status in real time.
Renovation of power distribution in old residential areas: Adapting to the upgrading and renovation needs of the power distribution room in old residential areas, the size is suitable for the original space of the power distribution room, and the old switchgear can be directly replaced to improve the reliability of power supply in the residential area and reduce power outages caused by equipment aging.
