Medium Voltage (MV) Switchgear
Your Leading Medium Voltage (MV) Switchgear Supplier
Trust In Grid Co., Ltd. is a professional transformer manufacturer, specializing in the design and production of power transformer, high-voltage switchgear, power distribution equipment, energy storage systems (ESS), magnetic wire, bushing and machining parts. Our power transformers are available in 500KV, 330KV, 220KV, and 110KV models, and are widely used in power utilities, renewable energy systems (solar and wind), industrial facilities, data centers, transportation infrastructure, and OEM applications.
Why Choose Us?
Production Capacity
With 6 factories covering 240,000 m², over 2,000 employees, and 200+ engineers, we support large-scale projects and long-term global supply with more than 30 years of export experience.
Advanced Equipment
We operate a complete set of in-house production equipment, including cutting, winding, CNC machining, vacuum drying, and testing systems, with over 450 machines ensuring stable quality and efficient output.
Quality Control
All products are manufactured and tested in compliance with IEC, IEEE, ANSI, CSA, UL/cUL, CE, and ISO 9001:2015 standards, ensuring reliable performance and smooth international approval.
OEM & ODM Capability
Our engineering team provides OEM/ODM support, including customized design and technical optimization, delivering tailored solutions for utility, industrial, and renewable energy projects.
Technical Specifications of Medium Voltage (MV) Switchgear
|
Parameter Category |
Technical Specification |
|
Rated Voltage |
7.2kV, 12kV, 17.5kV, 24kV, AC 50/60Hz |
|
Rated Current (Main Busbar / Circuit Breaker) |
Main Busbar: Up to 3150A; Breaker Unit: 630A, 1250A, 2000A, 2500A, 3150A |
|
Rated Short-Circuit Breaking Current (Isc) |
25kA, 31.5kA, 40kA, compliant with IEC 62271-100 |
|
Rated Short-Time Withstand Current (Icw) |
Matches Isc rating, typical 25kA / 4s, 31.5kA / 4s |
|
Rated Peak Withstand Current (Ipk) |
63kA, 80kA, 100kA (2.5 x Icw), compliant with IEC 62271-1 |
|
Power-Frequency Withstand Voltage (1 min) |
42kV (for 12kV class), compliant with IEC 62271-1 |
|
Lightning Impulse Withstand Voltage |
75kV (for 12kV class), compliant with IEC 62271-1 |
|
Degree of Protection (IP Code) |
Standard IP4X (between compartments), IP3X (enclosure) |
|
Applicable Standards |
IEC 62271-200 (AC metal-enclosed switchgear and controlgear), IEC 62271-1, IEC 62271-100 |
The Main Functions of a Medium Voltage (MV) Switchgear
Fault detection
Internal sensors and protective relays constantly monitor current and voltage for sudden surges caused by short circuits or overloads.
Rapid interruption
Upon detection, the relay commands a circuit breaker to open the circuit in milliseconds, isolating the damaged section before the massive energy can cause fire or equipment destruction.
Load switching
Engineers can close or open specific circuits to connect or disconnect equipment, allowing power to be rerouted during equipment upgrades or maintenance.
Monitoring and automation
Modern MV switchgear is often digitally native, allowing for remote monitoring and control, which improves efficiency and grid resilience (smart grid functionality).
Visible separation
Using a disconnect switch, also known as an isolator, an air gap is created to separate equipment from live power, ensuring the circuit is fully de-energised for work.
Switching devices
The separation can also be achieved through devices such as a fuse switch disconnector, an earthing switch, or a circuit breaker.
MV switchgear consists of several integrated components that work together to ensure safe electrical operation.
Circuit Breaker
The circuit breaker is one of the most important components. It automatically interrupts electrical current during faults such as short circuits or overloads.
Disconnect Switch
A disconnect switch isolates electrical circuits for maintenance and safety purposes.
Busbars
Busbars are conductive bars that distribute electrical power within the switchgear assembly.
Protection Relays
Protection relays monitor electrical parameters and trigger circuit breakers when abnormal conditions occur.
Current and Voltage Transformers
These transformers measure electrical current and voltage levels to support monitoring and protection systems.
Customization Options
|
Structure |
Customizable based on project requirements |
|
Material |
Customizable (steel, stainless steel, or others) |
|
Logo |
Customizable |
|
MOQ |
Flexible |
Power Distribution Networks
Utilities use MV switchgear to distribute electricity from substations to local distribution systems.
Industrial Plants
Factories rely on MV switchgear to control power supply to heavy machinery and production lines.
Renewable Energy Systems
Wind farms and solar power plants use MV switchgear to integrate energy generation into the grid.
Commercial Infrastructure
Airports, hospitals, shopping centers, and large office buildings use MV switchgear for reliable power management.
Transportation Systems
Railways and metro systems use MV switchgear for traction power distribution.
Comparison of MV Switchgear and LV Switchgear
|
Feature |
Medium Voltage |
Low Voltage |
|
Voltage Range |
1 – 36 kV |
≤ 1 kV |
|
Applications |
Grids, factories |
Homes, devices |
|
Equipment |
Switchgear, relays |
Fuses, breakers |
|
Risk & Handling |
Requires PPE, training |
General safety |
Maintenance of of Medium Voltage (MV) Switchgear
Routine Visual Inspection
Regularly check for dust accumulation, signs of corrosion, oil/gas leaks, loose fasteners, or discoloration (a sign of overheating).
Cleaning & Lubrication
Keep contact surfaces clean and apply lubricants to moving parts as needed to reduce friction and wear. Always de-energize before servicing.
Testing & Calibration
Periodically test protective relays, current transformers, and breakers. Ensure interrupting devices trip within safe time limits.
Scheduled Shutdowns
Plan annual maintenance windows to perform deeper inspections, insulation resistance testing, and component replacements without interrupting critical operations.
Ordering Process
Send Us Inquiry → Receive Our Quotation → Negotiate Details → Confirm the Sample → Sign Contract/Deposit → Mass Production →Cargo Ready → Balance/Delivery → Further Cooperation
Payment Terms
T.T with 30% downpayment, 70%before shipment.
Paypal or West Union also accept.
Customization Options
Material: Cu / Al
Cooling system: Customizable
Structure: Customizable
MOQ: Customizable
Our Service Highlights
Pre-Sales Consultation & Design Support
Early technical engagement to define requirements and deliver optimized solutions.
During Sales & Project Execution
Transparent project management with controlled production, quality tracking, and on-time delivery.
Warranty Advantage
Minimum 2-year warranty on all products, ensuring reliable and risk-free operation.
After-Sales Support
24/7 technical support with fast response, spare parts availability, and training services.
Long-Term Partnership
Lifelong technical support and upgrade guidance for sustained performance.
Packaging & Shipping
Packaging details:
Shockproof foam/moisture-proof film, professional export cartons/wooden crates/pallets.
Final assembly ensures mechanical integrity and readiness for transportation and installation.
Certificates
We're well-known as one of the leading medium voltage (mv) switchgear manufacturers and suppliers in China, also support customized service. Please feel free to buy high quality medium voltage (mv) switchgear made in China here from our factory. Contact us for more details.
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