Overview
The high-voltage cabinet is an assembled switchgear enclosure with a trolley floor-standing circuit breaker arrangement. It is equipped with a new type of composite insulation vacuum circuit breaker, which offers good interchangeability and simple replacement.
The cabinet is arranged so that the main switch, trolley and switchgear door are interlocked by mandatory mechanical locking, meeting the “five prevention” function. All operations can be performed with the cabinet door closed, and a fast grounding switch is used for grounding and circuit short-circuiting.
The enclosure has an IP3X protection level, and the trolley compartment door is IP2X when open. The product complies with GB3906-2020 and DL404-2007, and refers to the international IEC-298 standard.
Key Features
- Assembled cabinet structure — the cabinet structure adopts an assembly type.
- Trolley floor-standing circuit breaker — the circuit breaker adopts a trolley floor-standing structure.
- Composite insulation vacuum circuit breaker — equipped with a new type of composite insulation vacuum circuit breaker, featuring good interchangeability and simple replacement.
- Screw nut propulsion mechanism — the trolley frame is equipped with a screw nut propulsion mechanism, which allows easy movement of the trolley and prevents damage to the propulsion structure from accidental operation.
- Closed-door operation — all operations can be performed with the cabinet door closed.
- Five prevention interlocking — the interlocking between the main switch, trolley and switchgear door all use a mandatory mechanical locking method, meeting the “five prevention” function.
- Ample cable compartment — the cable compartment space is ample, allowing for the connection of multiple cables.
- Fast grounding switch — a fast grounding switch is used for grounding and circuit short-circuiting.
- Protection levels — the enclosure protection level is IP3X, and the trolley compartment door is IP2X when open.
- Standards compliance — complies with GB3906-2020 and DL404-2007, and refers to the international IEC-298 standard.
Technical Specifications
| Product name | High-voltage cabinet (HV switchgear cabinet) |
|---|---|
| Cabinet structure | Assembled (assembly type) |
| Circuit breaker arrangement | Trolley floor-standing structure |
| Circuit breaker type | New type composite insulation vacuum circuit breaker |
| Interchangeability | Good interchangeability; simple replacement of the circuit breaker |
| Trolley propulsion | Screw nut propulsion mechanism |
| Operation | All operations can be performed with the cabinet door closed |
| Interlocking | Mandatory mechanical locking between main switch, trolley and switchgear door |
| Safety function | Meeting the “five prevention” function |
| Cable compartment | Ample space, allowing connection of multiple cables |
| Grounding | Fast grounding switch for grounding and circuit short-circuiting |
| Enclosure protection level | IP3X |
| Trolley compartment door, open | IP2X |
| Standards | GB3906-2020, DL404-2007; refers to IEC-298 |
Applications
- Medium voltage switchgear rooms — indoor HV switching and protection with a closed-door operating routine.
- Cable-fed circuits — the ample cable compartment allows several cables to be connected in one cabinet.
- Installations requiring interlocked operation — where the “five prevention” mechanical interlocking is a requirement.
- Projects specifying GB or IEC standards — the cabinet complies with GB3906-2020 and DL404-2007 and refers to IEC-298.
Installation Conditions
- The cabinet is an assembled structure, so it should be erected and aligned as a complete assembly on site.
- The circuit breaker is a trolley floor-standing type, so allow room in front of the cabinet for the trolley to be moved in and out for replacement.
- Verify that the mandatory mechanical interlocking between the main switch, trolley and switchgear door is correctly set, as the “five prevention” function depends on it.
- The enclosure is rated IP3X and the trolley compartment door is IP2X when open, so the installation location should be within the intended indoor environment for that protection level.
- Confirm the fast grounding switch operation for grounding and circuit short-circuiting as part of commissioning.
- Check compliance documentation against GB3906-2020 and DL404-2007, and the reference to IEC-298, as required by the project.
How to Select
- Rated voltage and rated current required for the switchgear.
- The circuit breaker rating and whether the composite insulation vacuum circuit breaker arrangement suits the application.
- The number of cables to be terminated, given the cable compartment capacity.
- Whether a fast grounding switch for grounding and circuit short-circuiting is required.
- The protection level required — the enclosure is IP3X and the trolley compartment door is IP2X when open.
- The standards the project must meet — GB3906-2020, DL404-2007, or with reference to IEC-298.
FAQ
What structure does the cabinet use?
The cabinet structure adopts an assembly type, and the circuit breaker adopts a trolley floor-standing structure.
What is the "five prevention" function?
The interlocking between the main switch, trolley and switchgear door all adopt a mandatory mechanical locking method, meeting the "five prevention" function.
Can the cabinet be operated with the door closed?
Yes. All operations can be performed with the cabinet door closed.
What is the protection level of the cabinet?
The enclosure protection level is IP3X, and the trolley compartment door is IP2X when open.
How many cables can be connected?
The cable compartment space is ample, allowing for the connection of multiple cables.
What standards does the cabinet comply with?
The product complies with GB3906-2020 and DL404-2007, and refers to the international IEC-298 standard.
How is the trolley moved and protected?
The trolley frame is equipped with a screw nut propulsion mechanism, which allows easy movement of the trolley and prevents damage to the propulsion structure due to accidental operation.
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