IEEE MV Switchgear

IEEE MV Switchgear: Authoritative Criterion of Professional Design and Reliable Operation

In the field of industrial power distribution and control, MV Switchgear is core device to guarantee grid security and reliable operation. As professional manufacturer that has obtained UL Factory Certification since 2014, we comprehend that design and manufacturing compliance with IEEE Standard is basis of switchgear stable operation in critical task environment. This column is to provide you profound understanding of IEEE core standards, and demonstrate design and application must be implemented by professional team.

A, IEEE MV Switchgear Standard System Overview

Standard developed by IEEE is authoritative basis for design, test and application of global MV switchgear. By contrast with UL Standard emphasizing safety certification, IEEE Standard place emphasis on comprehensive specification of performance, test method, operation condition.

Core Standard include the following:

· IEEE C37.20.2：Standard for Metal-Clad Switchgear

· IEEE C37.20.3：Standard for Metal-Enclosed Interrupter Switchgear

· IEEE C37.04：Standard Rating Structure for AC High-Voltage Circuit Breakers

· IEEE C37.09: Standard Test Procedure for AC High-Voltage Circuit Breakers

· IEEE C37.010：Application Guide for AC High-Voltage Circuit Breakers

UL vs IEEE

· UL standard guarantee basic safety threshold of Industrial Control Panel.

· IEEE standards guarantee performance and reliability of MV Switchgear under complex operating conditions.

In brief, MV Switchgear compliance with IEEE Standard is, besides safety, designed for various challenges in real industrial environment.

B, IEEE Core Requirement illumination- Exhibition of Professional

1. Rating and Performance Level (IEEE C37.04/C37.20.2)

o Requirement: Specify critical data such as rated voltage, rated current, rated short-circuit breaking current, rated short-time withstand current, etc.

o Exhibition of Professional: We apply precise analysis stringent type test to guarantee rating of switchgear match with operating condition, and eliminate the risks of "False Data" or "Insufficient Capability"

2. Insulation Coordination and Dielectric Strength Performance (IEEE C37.20.2)

o Requirement: Specify requirements of insulation withstand test such as power frequency withstand, lightning impulse withstand, etc., and correction factor of different altitudes.

o Exhibition of Professional: Our design utilizes sufficient insulation margin and complete dielectric strength test to guarantee reliable insulation and application of complicated grid environment under impulse overvoltage.

3. Internal Arc Protection (IEEE C37.20.7)

o Requirement: Define, test and verify the class of Accessibility Front/Lateral/Rear (AFL) under internal arc fault of switchgear.

o Exhibition of Professional: We apply specific pressure release channel design, reinforcement of structural strength and directional pressure release technology to direct arc energy to designated direction and to protect operator’s safety.

4. Performance of Structure and Mechanical (IEEE C37.20.2)

o Requirement: Specify continuity of grounding, lock and interlock, and mechanical operating life‌.

o Exhibition of Professional: We apply reliable mechanical interlock, programmed lock and test of mechanical operating life to guarantee correct operation sequence after thousands of operations.

5. Temperature Rise and Heat Dissipation (IEEE C37.20.2)

o Requirement: Temperature rise of each component must not exceed limit in the standard‌ under rated current.

o Exhibition of Professional: We apply thermal simulation and optimize selection of components to guarantee the temperature of power device will be controlled within reason during full-load operation, and eliminate fault due to overheat.

C, Why is professional team responsible for MV Switchgear?

Based on complexity and rigorousness of above IEEE Standard, MV Switchgear is by no means a simple assembly of standard products.

· Challenges of System Integration: Integrate tens of components including but not limited to circuit breaker, disconnect switch, transformer and protector into reliable system under multiple constraints including electromagnetic, thermal, mechanical.

· Application of Professional Knowledge: Must comprehend short-circuit current calculation, insulation coordination and arc protection. It is by no means regular electrical assembly.

· Threshold of Test and Verification: Type test such internal arc test, short-circuit current interruption shall be executed in National Laboratory.

· Legal Liability and Risk: Switchgear designed by nonprofessional teams is just like "ticking bomb". In the event that a fault occurs, it may cause a total power outage, significant property losses and even casualties. The owner will bear unshirkable legal liability.

Conclusion：
IEEE Standard is authoritative engineering language of instructing design, manufacturing and application. By means of insight of UL QMS and profound comprehension of IEEE Standard, we guarantee each deliverable MV Switchgear is outstanding performance, supreme safety, and durable reliability.

Handing over your critical tasks of power distribution and control to us possessing dual professional qualifications, is the most reliable choice.