TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Power and industrial substations
For receiving and distributing power with switching, protection and monitoring functions.
MINGKONGmkelecsolution.com
Product illustration. Actual configuration varies by specification.
Open product image ↗Medium-voltage Switchgear
KYN28A-24 · Metal-clad withdrawable switchgear
Indoor withdrawable metal-clad switchgear for 24 kV-class applications.
- Voltage designation
- 24 kV
- Selection
- Rated current, fault duty and circuit arrangement
- Rated current options
- 630 / 1,250 / 1,600 / 2,000 / 2,500 / 3,150 A
- Frequency
- 50 / 60 Hz
- Enclosure protection
- IP4X
Price on enquiry · Configuration, quantity & destination
Supply scope, manufacturer information, applicable documents and warranty arrangements are confirmed in the quotation and order.
APPLICATION & DUTY
Where KYN28A-24 fits
KYN28A-24 is indoor metal-clad withdrawable switchgear for 24 kV three-phase systems. It combines a withdrawable vacuum-breaker arrangement with primary-circuit insulation and secondary protection/control equipment. The configuration is defined by feeder duty, current, fault level and the required control scheme.
APPLICATION / 02
Building distribution
For high-rise and large-building installations using a 24 kV distribution arrangement.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Withdrawable vacuum breaker
The breaker arrangement is selected together with its truck and cabinet interface. This is especially important when specifying replacements or matching an existing lineup.
DETAIL / 02
Primary-circuit insulation
Bus insulation uses heat-shrink or epoxy-coated arrangements described for the series. The selected insulation and breaker configuration form part of the complete assembly.
DETAIL / 03
Operating interlocks
Interlocking functions address truck movement, earthing and compartment access. The actual combination must match the selected primary and secondary scheme.
DETAIL / 04
Protection and control compartment
Secondary control and protection components are configured around the feeder duty. Supply the required protection functions, CT/PT information and control voltage.
DETAIL / 05
Cabinet-size selection
The table gives two cabinet-width alternatives with corresponding dimensions. Select the physical arrangement together with current rating, cable terminations and installation access.
DEFINE THE SELECTED ASSEMBLY
Configuration & installation interfaces
Match the installation drawing, cable routes, clearances and electrical duty for the selected equipment.
Illustrative working scene- Rating combination
- The table covers 24 kV, 50/60 Hz and several current alternatives. Select the breaking and withstand duties as a consistent combination.
- Control supply
- DC or AC 110/220 V alternatives are listed; identify the required supply and operating interfaces.
- Protection scope
- Specify relay functions, metering, communication and interlocking requirements.
Installation & connection checklist
- Provide room layout, access openings and cable-entry locations.
- Identify cable sizes and termination arrangements.
- State bus-extension and cabinet-lineup requirements.
- For replacement, supply breaker/truck dimensions and the secondary connection diagram.
Operating conditions for the listed configuration
- Indoor installation; altitude up to 1,000 m.
- Ambient −15 to +40 °C; 24-hour average up to +35 °C.
- Daily average relative humidity up to 95%; monthly average up to 90%.
State any different ambient temperature, altitude, humidity, dust, salt or corrosive exposure when requesting the installation-specific configuration.
RATING DATA
Technical parameters
11Parameter / configuration entries
Units shownCompare values with their units
Selected variantConfirm the matching configuration
Review the listed configuration and applicable units. On a small screen, scroll the table sideways.
| Parameter | Catalogue value |
|---|---|
| Rated voltage | 24 kV |
| Frequency | 50 / 60 Hz |
| Rated current options | 630 / 1,250 / 1,600 / 2,000 / 2,500 / 3,150 A |
| Short-circuit breaking current options | 20 / 31.5 kA |
| Short-time withstand current (4 s) | 20 / 31.5 kA |
| Peak withstand current options | 50 / 80 kA |
| Auxiliary control voltage | DC or AC 110 / 220 V |
| Auxiliary-circuit power-frequency withstand | 2,000 V |
| Enclosure protection | IP4X; IP2X with breaker-compartment door open |
| Cabinet dimensions (W × D × H) | 800 × 1,810 × 2,380 or 1,000 × 1,810 × 2,380 mm |
| Catalogue weight range | 840–1,440 kg |
Checked against original distribution catalogue PDF page 14. 20 kA and 31.5 kA variants correspond to 50 kA and 80 kA peak ratings respectively. Ratings describe catalogue options, not every possible combination; select the complete configuration in the technical schedule.
Drawings & configuration documents
Send your selected rating and installation requirements to request the matching dimensional drawing, connection details and technical schedule.
DOCUMENTS · DELIVERY · SUPPORT
Technical coordination & after-sales enquiries
Confirm the order documents
Agree the selected specifications, applicable drawings, inspection records and identification requirements in the quotation and order.
Coordinate delivery
Include quantity, destination, packing requirements and preferred trade terms. Confirm transport scope and the requested delivery schedule with the quotation.
Request technical support
For an existing unit, provide its model, nameplate or order reference and a description of the issue. Include relevant photos or records already available. Warranty and service scope follow the agreed order terms.
Contact about this model ↗START WITH WHAT YOU HAVE
Prepare a quotation for this equipment.
Choose your enquiry type. Start with the information you have.
Price on enquiry
Quotations are prepared for the selected configuration, quantity and destination. Currency, validity, delivery terms, freight and any applicable duties or taxes are specified in the quotation.
Project procurement
New installations & project tenders
Discuss a project ↗What to prepare
Provide voltage, fault duty, circuit schedule and required protection scheme.
Distributor procurement
Model lists & repeat orders
Discuss supply requirements ↗What to prepare
List circuit configurations, ratings, preferred components and destination documentation needs.
Panel & equipment builders
Equipment integration & matching
Discuss an assembly ↗What to prepare
Send the line-up layout, bus interfaces, breaker specification and secondary wiring requirements.
Repair & replacement
Identify an existing unit or part
Identify a replacement ↗What to prepare
Provide the existing panel and breaker details, dimensions, plug connections and interlocks.
Illustrative enquiry scenarios.
Selection checklist for KYN28A-24
- System voltage, frequency, rated current and prospective fault level
- Bus arrangement and incoming/outgoing circuit schedule
- Breaker or load-switch duty, protection and control supply
- Cable terminations, room layout, access and expansion requirements
- Provide room layout, access openings and cable-entry locations.
- Identify cable sizes and termination arrangements.
- State bus-extension and cabinet-lineup requirements.
- For replacement, supply breaker/truck dimensions and the secondary connection diagram.
From enquiry to an agreed supply
- Share the requirementModel, duty, quantity and destination.
- Review the configurationResolve ratings, interfaces and site conditions.
- Agree the technical scheduleScope, drawings, tests, price and delivery terms.
- Confirm delivery documentsAgree packing, identification and the applicable inspection records.
Testing, warranty terms and after-sales scope are to be agreed in the quotation and order documents for the selected configuration.
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Mingkong High & Low Voltage Switchgear Selection Guide · Updated 24 October 2026 · Chinese / English
For a quotation, include your required model, rating, quantity and operating conditions.