Select from our core engineered products deployed across global utilities, renewable microgrids, heavy industry, and commercial complexes.
At Mingri Electric Co., Ltd., our story begins with a simple yet profound vision held by our founder, Mr. Fu: "To safeguard every circuit." This unyielding commitment to electrical safety and system reliability has driven us to fundamentally rethink how medium-voltage power distribution should be engineered—from the ground up.
Medium-Voltage Metal-Clad Switchgear serves as the operational backbone for primary substations, industrial power plants, and mission-critical facilities. Operating in environments ranging from 3.6kV to 40.5kV, metal-clad assemblies must deliver complete physical isolation between internal compartments, absolute arc-flash containment, and uninterrupted continuity of service under severe fault conditions.
As a global Original Design Manufacturer (ODM) and Original Equipment Manufacturer (OEM), Mingri Electric bridges high-end electrical engineering with state-of-the-art lean manufacturing, providing customized metal-enclosed and metal-clad switchgear architectures that translate technical specifications into measurable operational value.
Distinguishing Metal-Clad Switchgear from generic metal-enclosed equipment through total compartmentation, grounded metal barriers, and withdrawable circuit breaker technology.
Designed strictly to IEC 62271-200 and IEEE C37.20.2 standards. Includes isolated grounded metal partitions for: 1) Busbar Compartment, 2) Circuit Breaker Compartment, 3) Cable/Instrument Transformer Compartment, and 4) Low Voltage Control Compartment. Prevents arc fault propagation across sections.
Engineered for maximum operator safety with IAC AFLR rating up to 40kA/1s or 50kA/0.5s. Integrated pressure relief flaps automatically channel high-pressure hot gases into dedicated exhaust channels away from technical personnel.
Mechanical anti-misoperation interlocks prevent: racking out the breaker while closed, closing the breaker when in intermediate racking positions, closing the earthing switch when the breaker is energized, and energizing the bus when earthing switch is engaged.
| Electrical Parameter | KYN28-12 Specification | KYN61-40.5 Specification | Compliance Standard |
|---|---|---|---|
| Rated Voltage (Ur) | 12 kV | 40.5 kV | IEC 62271-1 / IEEE C37.20.2 |
| Rated Current (Ir) | 630 A – 4000 A | 630 A – 3150 A | IEC 62271-200 |
| Short-Time Withstand Current (Ik) | 25kA / 31.5kA / 40kA (4s) | 25kA / 31.5kA (4s) | GB/T 3906 |
| Peak Withstand Current (Ip) | 63 kA / 80 kA / 100 kA | 63 kA / 80 kA | IEC 62271-200 |
| Degree of Protection | IP4X (Enclosure) / IP2X (Between Compartments) | IP4X (Enclosure) / IP2X (Partitions) | IEC 60529 |
| Partial Discharge Level | < 10 pC at 1.1 Un | < 10 pC at 1.1 Un | DL/T 404 |
Quality isn't an afterthought; it's built into every component. That's why at Mingri Electric we don't just assemble switchgear—we redefine its foundations. Our team works hand-in-hand with precision stamping suppliers to co-develop custom molds and high-performance metal components. These aren't generic off-the-shelf parts; they're engineered to our exacting standards, ensuring flawless integration into our low- and high-voltage circuit breakers.
Because we control the complete manufacturing flow—from rawAl-Zn alloy sheet metal laser cutting, CNC bending, and robotic welding to in-house vacuum interrupter calibration—we guarantee total compatibility when breakers become the core of our switchgear systems. This vertical integration isn't just about efficiency—it's about total accountability at every single step.
Customized ODM Medium Voltage configurations engineered for specialized performance demands.
Requirement: 99.999% continuous uptime, ultra-low maintenance, rapid fault isolation.
ODM Solution: Compact KYN28 metal-clad units with dual-power bus couplers, real-time thermal wireless sensors on busbar joints, and high-speed automatic transfer systems (ATS).
Requirement: Harsh outdoor environments, high harmonic distortion, wide temperature fluctuations.
ODM Solution: Integrated step-up prefabricated substations (YB□-12 series) combined with solid-insulated gas-free ring main units resistant to salt mist, sand, and ambient extremes (-40°C to +50°C).
Requirement: Frequent load switching, high inductive motor loads, seismic resilience.
ODM Solution: Heavy-duty metal-enclosed withdrawable panels fitted with vacuum contactor-fuse combinations (VCF) designed for over 100,000 mechanical operations and reinforced seismic frame bracing.
Navigating the energy transition requires moving beyond incremental upgrades to fundamental reimagining of power distribution infrastructure.
Phasing out Greenhouse gases with GWP > 23,500. Next-gen switchgear utilizes dry air insulation, Fluoronitriles gas mixtures, or epoxy solid encapsulation (GXGN-12 Series) to achieve zero global warming potential without sacrificing dielectric strength.
Embedding optical partial discharge sensors, wireless busbar temperature monitoring, and breaker vibration analytics directly into IoT gateways. Edge computing algorithms predict contact wear and insulation degradation before catastrophic breakdown occurs.
Modular component design ensures retrofittable smart upgrades. Busbars, breakers, and relay units can be replaced independently, extending operational asset lifespans up to 30 years and minimizing life-cycle carbon footprint.
Streamlined custom engineering framework built for EPC contractors, regional switchgear brands, and original equipment buyers.
Single-line diagram (SLD) review, primary circuit selection, protection scheme definition, short-circuit withstand calculation.
Sheet metal structural prototyping, thermal dissipation modeling, electrical stress analysis, and custom tooling development.
Internal arc tests, dielectric power frequency tests, temperature rise verification, and mechanical endurance certification.
Lean assembly, FAT/SAT testing support, international export packaging, and 24/7 lifecycle technical assistance.
Navigating global grid interconnection codes requires stringent adherence to localized safety standards and utility approvals. Mingri Electric switchgear systems are fully certified to international benchmarks, ensuring seamless integration into regional grids worldwide.
IEC 62271-200, IEC 62271-100, IEC 62271-102
IEEE C37.20.2, IEEE C37.04, IEEE C37.55
ISO 9001:2015, ISO 14001, ISO 45001
Factory Acceptance Testing (FAT) & SAT Video Audits
Expert answers regarding ODM switchgear specifications, customization options, and procurement protocols.
Complete range of OEM circuit breakers, disconnect switches, contactors, and cable distribution hardware.
Mingri Electric