KYN28‑24 switchgear is indoor metal‑clad withdrawable AIS unit built for day‑to‑day medium‑voltage power distribution, circuit protection, metering and operational control. It is widely deployed inside substations, heavy‑industry facilities and power‑plant auxiliary buildings.
As proven 24kV medium voltage switchgear, this air‑insulated equipment adopts withdrawable vacuum circuit‑breaker (VCB) handcart architecture. Its metal‑clad layout physically partitions busbar zones, breaker working area, cable termination section and low‑voltage control compartment into segregated chambers. This compartment‑oriented layout improves site‑operational safety and simplifies on‑site inspection and scheduled maintenance work.
Standard build covers continuous current ratings ranging from 630A up to 3150A, paired with 25kA or 31.5kA /4‑second short‑time withstand capability. Actual performance figures are subject to your final bill‑of‑material selection. This 24kV AIS switchgear can be tailored for either 50 Hz or 60 Hz three‑phase AC grid networks.
Compared with non‑compartmentalized medium‑voltage switch cabinet designs with limited safety isolation performance, the KYN28‑24 metal‑clad withdrawable switch cabinet adopts a full metal‑clad partition structure. It physically separates live busbars, circuit‑breaker operating units, cable terminals and control instruments into independent chambers.
As a mature 24kV vacuum circuit breaker switchgear cabinet, it supports flexible transition between test and working positions via a withdrawable handcart. This allows equipment inspection, maintenance and component replacement without a full‑system power outage. Equipped with a standard five‑mechanical interlock system, it mitigates manual mis‑operation risks and complies with international indoor power safety specifications.
Every unit undergoes comprehensive type‑testing prior to delivery, covering insulation resistance, short‑circuit endurance, mechanical operating life and internal‑arc resistance. For overseas EPC projects, the switchgear can be upgraded with LSC2B internal arc protection together with complete standard‑compliance documentation. It is suitable for global 50Hz/60Hz power grid operation, subject to final project configuration.
| Technical Item | Specification |
|---|---|
| Product Model | KYN28‑24 |
| Rated Voltage | 24kV |
| Applicable System | 20kV / 24kV medium‑voltage systems, subject to project grid design |
| Rated Frequency | 50Hz / 60Hz |
| Rated Current | 630A / 1250A / 2000A / 2500A / 3150A |
| Short‑Time Withstand Current | 25kA / 31.5kA, 4s |
| Rated Peak Withstand Current | 63kA / 80kA |
| Insulation Type | Air Insulated Switchgear (AIS) |
| Construction | Metal‑clad, withdrawable type |
| Applicable Standard | IEC 62271‑200; GB/T 3906 |
| Enclosure Protection | IP4X; IP2X for specified open compartment conditions |
| Circuit Breaker | 24kV withdrawable vacuum circuit breaker |
| Standard VCB Reference | ZN63‑VS1‑24 |
| Installation | Indoor, fixed floor installation |
Note: Final equipment ratings shall be cross‑checked against your selected bill‑of‑materials and tender specification.
This 24kV withdrawable metal‑clad switchgear uses compartment‑based cabinet design. Physical metal barriers limit cross‑influence between primary high‑voltage parts and secondary control circuits, and grant controlled access during maintenance windows.
This compartment houses protection relays, panel meters, local control switches and status indication hardware together with secondary wiring looms.
Per‑project configuration enables overcurrent & earth‑fault protection, energy metering, status feedback as well as local‑remote dual‑mode operation.
The core operating bay holds the 24kV vacuum circuit breaker switchgear handcart unit. Operators can lock the VCB handcart at service or test position following site safety procedures.
Compared against fixed‑breaker cabinets, the withdrawable design cuts downtime for periodic inspection and breaker servicing. When non‑standard VCB hardware is specified for a tender, mechanical and electrical interfaces must be validated during technical review phase.
Main and branch busbars are contained within this fully segregated chamber, isolated mechanically from breaker and cable compartments.
Single‑busbar setup is standard; alternative busbar schemes require pre‑project approval. Busbar cross‑section, insulation treatment, temperature‑rise margin and short‑circuit resistance are matched to overall switchgear assembly and client technical requirements.
Incoming / outgoing power cables terminate inside this enclosed bay. It provides mounting space for current transformers, voltage transformers, earthing switches and cable lugs as per your one‑line‑diagram.
Internal layout can be adjusted for cable quantity, termination method, instrument transformer requirements and site installation limitations.
Segmented metal‑clad compartments separate high‑energy primary circuits. Coupled with mechanical interlock chains, the design reduces human error risks during switching tasks.
The travelling VCB handcart supports test‑position diagnostics. Site crews can inspect, test or exchange the vacuum breaker without full cabinet disassembly, minimizing plant downtime.
Primary insulation relies on atmospheric air instead of SF₆ gas. It removes gas‑handling work‑flows, gas‑leak monitoring and related consumables over the equipment service life.
Rated current, short‑circuit withstand rating, CT/VT packages, protection hardware, cable entry orientation and auxiliary circuits can all be tuned for individual project needs.
Rated for 24kV class, this switchgear addresses use cases calling for higher insulation capability than conventional 12kV distribution equipment.
KYN28‑24 fits indoor medium‑voltage distribution for:
For renewable‑energy interconnection, align switchgear configuration with transformer parameters, protection philosophy, grid‑code rules and system short‑circuit calculation results.
Design follows requirements laid out in IEC 62271‑200 together with corresponding GB/T national standards. IEC 62271‑200 defines requirements for AC metal‑enclosed switchgear covering 1 kV up to 52 kV, which directly governs this 24kV switchgear IEC 62271‑200 assembly.
Each unit goes through factory routine inspection and functional testing. Upon request we can supply type‑test documentation for client technical appraisal.
Export‑oriented project documentation package may include:
Exact deliverables are to be confirmed at order stage.
Every 24kV switchgear for substations and industrial installation needs project‑specific engineering input.
Our technical team supports review for:
For overseas EPC tenders, share your single‑line diagram, technical specification sheet, equipment list or tender document so we can carry out proper configuration review.
What is KYN28‑24 switchgear used for? KYN28‑24 is 24kV switchgear for industrial power distribution. It receives, distributes, switches and protects medium‑voltage circuits inside substations, manufacturing plants and power‑generation facilities.
Is KYN28‑24 an air‑insulated switchgear? Yes. KYN28‑24 is air‑insulated (AIS), metal‑clad withdrawable switchgear. Its main insulation medium is ambient air; SF₆ gas is not used for primary insulation.
What vacuum circuit breaker is used with KYN28‑24? Standard reference unit is ZN63‑VS1‑24 withdrawable vacuum circuit breaker. If you intend to adopt alternative VCB brands/models, mechanical & electrical interfaces must be verified before order confirmation.
What rated current is available? Available current classes: 630A, 1250A, 2000A, 2500A, 3150A. Real‑world achievable current depends on busbar selection, breaker rating, feeder layout and thermal design of the whole assembly.
Can KYN28‑24 be used for 20kV systems? Yes, 24kV‑rated hardware can serve 20kV networks. You must verify insulation coordination, protection settings and overall project specification to match actual grid conditions.
Can the switchgear be customized for an EPC project? Yes. Cabinet layout, VCB type, instrument‑transformer setup, protection scheme, cable connection method, auxiliary circuits and document scope can be adjusted to match tender requirements.
When sourcing medium‑voltage switchgear, unit price alone cannot represent total project cost. Compatibility with your existing system, protection‑coordination performance, availability of test certificates, spare‑part supply, lead‑time constraints and after‑sales technical support carry equal weight.
Our engineering group evaluates your technical requirements prior to quotation and helps finalize the correct 24kV metal‑clad switchgear configuration.
Share your single‑line diagram, technical specification, target current & short‑circuit ratings and VCB preferences, and we will return a technical proposal and commercial quotation.
