Primary MV Switchgear

ML-AIS1224

12/24 kV Air-Insulated Metal-Enclosed Withdrawable Switchgear

Indoor primary distribution switchgear with documented 12 kV reference ratings and a 24 kV product platform.

Chinese model: KYN28A-12/24Model-linked reports and English reading guides
View technical data
Rated voltage / frequency12 / 24 kV - 50 Hz
Rated current (12 kV reference)1250 A
Main-circuit short-time withstand (12 kV report)31.5 kA / 4 s
Main-circuit peak withstand (12 kV report)80 kA

For controlled power distribution

12/24 kV primary MV switchgear

ML-AIS1224 combines air-insulated metal-enclosed construction with a withdrawable device arrangement for utility, industrial, infrastructure and renewable-energy distribution. Published values define the catalogue reference; the offered configuration is confirmed against approved project documents.

  • 01Withdrawable switching-device arrangement
  • 02Documented internal-arc reference classification
  • 03Defined insulation, enclosure and endurance references

Applications

Where this platform supports the distribution system

Application pages connect operating priorities and equipment-selection considerations to the relevant Minglang product platforms.

Typical applications
Utility distributionIndustrial facilitiesInfrastructureRenewable energy and storage

Customer benefits

Get to know the product and its documentation

Explore how the equipment is used, review the published reference data, and ask our team about anything you would like to understand.

01

Understand the design

Explore the catalogue references to understand what the product is designed to do. The report notes explain which configuration the available evidence covers.

02

Ask about the configuration

Ask our team about the enclosure, devices, interfaces and ratings before deciding whether this product is relevant to your application.

03

Review the evidence

The linked KYN28A-12 report covers the stated 12 kV configuration. It does not establish 24 kV or 40.5 kV performance. Catalogue values are not a substitute for the report's tested model, configuration and conditions.

04

Understand the next steps

If you choose to explore a project, we can explain the drawings, inspection records and final documentation associated with the proposed configuration.

Technical data

Documented reference configuration

Published values describe the catalogue range; they are not a claim that every configuration has been tested. Model-specific evidence is identified in the resources below. When you need a selection, our team can help confirm the configuration and its documentation.

Rated voltage / frequency12 / 24 kV - 50 Hz
Rated current (12 kV reference)1250 A
Main-circuit short-time withstand (12 kV report)31.5 kA / 4 s
Main-circuit peak withstand (12 kV report)80 kA
Internal arc (12 kV reference)IAC AFLR - 31.5 kA / 1 s
12 kV insulation levels42/48 kV - 75/85 kV
24 kV catalogue insulation (not report-verified)65/79 kV - 125/145 kV
Protection (12 kV report reference)IP4X enclosure - IP2X with CB compartment open
Impact resistance (12 kV report reference)IK10
12 kV endurance classesCircuit-breaker E2/M2 - earthing switch E2/M1

Outline and dimensions

Reference envelope for early layout work

12 kV reference: 800 W x 1500 D x 2300 H mm; 24 kV typical: 800/1000 W x 1810 D x 2380 H mm

Final dimensions are subject to the approved general arrangement.
Drawing views: Front View · Side View
ML-AIS1224 front view · side view reference outline with dimensions

Find out more

Technical resources

Read the original model, report scope and English explanation together. You can explore the documents before deciding whether to discuss a project.

The linked KYN28A-12 report covers the stated 12 kV configuration. It does not establish 24 kV or 40.5 kV performance.

English guide cover for report 25K133K40078
Test report

12 kV withdrawable metal-enclosed switchgear

Original reported model
KYN28A-12/1250-31.5
Report / year
25K133K40078 · 2025
Recorded reference
Rated voltage: 12 kV; Rated current: 1250 A; Frequency: 50 Hz; Main Icw: 31.5 kA / 4 s; Main peak: 80 kA; IAC: AFLR 31.5 kA / 1 s; Enclosure: IP4X / IK10; internal compartments and circuit-breaker door open IP2X
Standards stated in the report
GB/T 3906-2020 · DL/T 404-2018 · GB/T 1984-2024 · DL/T 402-2016 · GB/T 1985-2023 · DL/T 486-2021 · GB/T 11022-2020 · DL/T 593-2016 · GB/T 7261-2016
Corresponding range: ML-AIS1224 →
What this report covers
  • This is an independently prepared English reading guide, not an English report issued by the test laboratory. The complete Chinese original follows unchanged and governs interpretation.
  • Results apply to the submitted sample, stated configuration, test conditions and listed tests only. They are not a blanket certificate for all Minglang products or all project requirements.
  • Marketing product names identify a website range; the source report model, ratings and configuration must be matched before the evidence is used for an order.
  • Applies to the 12 kV / 1250 A / 31.5 kA configuration only. This report does not substantiate 24 kV or 40.5 kV variants.
  • The component circuit-breaker report 25K133K40079 is separate evidence; it does not replace assembly verification.
  • Source p5 lists earthing-circuit duration 2 s, while summary p7 prints 4 s. Obtain clarification before using that particular earthing rating. Main-circuit and IAC values above are separately traceable.
  • Source p9 identifies different samples for different tests. This is not a claim that every test was performed on one physical cabinet.

4 guide pages + 335 source pages · 32.3 MB

Product questions

Get familiar with this product

What is the published reference for ML-AIS1224?

The page lists the catalogue reference configuration for ML-AIS1224. Final ratings and interfaces remain subject to the approved project documents.

Are the published dimensions fixed for every project?

No. The dimensions are a documented reference envelope. Final width, depth, height and lineup arrangement depend on the selected devices, ratings, cable interfaces and approved general arrangement.

What evidence can be requested?

The linked KYN28A-12 report covers the stated 12 kV configuration. It does not establish 24 kV or 40.5 kV performance. Catalogue values are not a substitute for the report's tested model, configuration and conditions.