TRANSFORMERS & ELECTRICAL COMPONENTS
APPLICATION / 01
Indoor distribution switchgear
For compatible air-insulated switchgear requiring the selected embedded-pole breaker arrangement.
MINGKONGmkelecsolution.com
Product illustration. Actual configuration varies by specification.
Open product image ↗Circuit Breakers
MKM65-12 · Solid-sealed vacuum circuit breaker
Indoor vacuum circuit breaker with epoxy-embedded poles.
- Voltage designation
- 7.2–12 kV
- Selection
- Rated current and breaking capacity
- Frequency
- 50 Hz
- Mechanical life stated
- 10,000 operations
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 MKM65-12 fits
MKM65 is an indoor vacuum circuit-breaker arrangement using embedded poles. The vacuum interrupter and principal conducting components are incorporated within the insulating pole construction. Fixed and withdrawable applications require matching electrical ratings, operating functions and mechanical interfaces.
APPLICATION / 02
Existing breaker replacement
For replacement projects supported by nameplate, mounting, terminal and secondary-interface information.
PRODUCT ENGINEERING
Construction & operating functions
DETAIL / 01
Embedded pole construction
The insulating pole uses epoxy embedding around the interrupter and associated conducting components. Pole construction is a defining feature of this series.
DETAIL / 02
Vacuum switching function
Interruption occurs in the vacuum interrupter. Required breaking duty and operating sequence must match the selected rating.
DETAIL / 03
Operating and control arrangement
The operating mechanism is selected with the trip, close and auxiliary circuits. Available control-supply variants must be matched to the installation.
DETAIL / 04
Fixed and withdrawable applications
Mounting arrangement and terminal interfaces differ between assemblies. Similar voltage or current ratings do not establish interchangeability with another breaker series.
DEFINE THE SELECTED ASSEMBLY
Configuration & installation interfaces
Match the installation drawing, cable routes, clearances and electrical duty for the selected equipment.
Illustrative working scene- Ratings
- Provide required voltage, current and fault duties.
- Mechanism
- State operating supply, trip/close functions and auxiliary contacts.
- Assembly
- Identify fixed or truck arrangement and the host switchgear.
Installation & connection checklist
- Submit pole pitch, terminals and mounting dimensions.
- Provide the secondary plug and interlock information.
- Identify any existing breaker variant and nameplate.
- Use the agreed mechanical and electrical schedule to confirm the replacement.
Operating conditions for the listed configuration
- Indoor installation; altitude up to 2,000 m.
- Ambient −15 to +40 °C; relative humidity below 95%.
- Installation free of dripping water, severe contamination, chemical corrosion and severe vibration.
State any different ambient temperature, altitude, humidity, dust, salt or corrosive exposure when requesting the installation-specific configuration.
RATING DATA
Technical parameters
12Parameter / 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 in table | 12 kV |
| Rated frequency | 50 Hz |
| Lightning impulse withstand | 75 kV |
| 1 min power-frequency withstand | 42 kV |
| Short-circuit breaking current options | 20 / 25 / 31.5 / 40 kA |
| Short-circuit withstand duration | 4 s |
| Closing time | 30–70 ms |
| Opening time | 20–50 ms |
| Mechanical life stated in catalogue | 10,000 operations |
| Stored-energy/operating voltage options | AC 220 / 110 V; DC 220 / 110 V |
| Contact opening distance | 11 ±1 mm |
| Contact overtravel | 3.5 ±0.5 mm |
Checked against original distribution catalogue PDF page 50. Current-to-breaking-capacity combinations and mounting interfaces require a matching variant drawing. 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
Specify electrical duty, installation arrangement and the required protection coordination.
Distributor procurement
Model lists & repeat orders
Discuss supply requirements ↗What to prepare
List complete breaker variants, pole counts, control voltages and accessory combinations.
Panel & equipment builders
Equipment integration & matching
Discuss an assembly ↗What to prepare
Provide mounting, terminals, operating mechanism and secondary wiring interfaces.
Repair & replacement
Identify an existing unit or part
Identify a replacement ↗What to prepare
Start with the complete nameplate and photos of terminals, mounting, secondary plug and accessories.
Illustrative enquiry scenarios.
Selection checklist for MKM65-12
- Nameplate and exact existing variant when replacing equipment
- Voltage, current, short-circuit duty and protection settings
- Pole spacing, mounting dimensions and terminal arrangement
- Operating/control voltage, trip functions and auxiliary contacts
- Submit pole pitch, terminals and mounting dimensions.
- Provide the secondary plug and interlock information.
- Identify any existing breaker variant and nameplate.
- Use the agreed mechanical and electrical schedule to confirm the replacement.
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.