Low Voltage Switchgear
The Low Voltage Switchgear is a high-performance electrical distribution and protection system designed for safe, reliable, and efficient low-voltage power management in industrial facilities, commercial buildings, utility substations, renewable energy systems, and infrastructure projects. The switchgear integrates circuit breakers, protection relays, busbar systems, metering devices, and intelligent control components into a modular enclosure structure to provide stable electrical distribution and advanced operational safety. Manufactured using precision-engineered components and high-quality insulation materials, the low voltage switchgear ensures excellent electrical performance, thermal stability, and mechanical durability under demanding operating conditions. The modular cabinet design improves installation flexibility, simplifies maintenance procedures, and supports future expansion requirements while minimizing operational downtime. The Low Voltage Switchgear supports multiple distribution architectures, intelligent monitoring systems, and smart-grid communication protocols for modern energy management applications. With customizable configurations and scalable electrical protection functions, the system delivers dependable power distribution performance for industrial automation systems, commercial electrical networks, data centers, transportation infrastructure, and utility power systems.
- Primary Voltage Ratings 380V / 400V / 415V / 690V
- Type Switchgear
- Standards IEC 61439 / IEC 60947 / ANSI
- Application industrial automation systems, commercial buildings
- Certificate UL, CESI, IEEE
- Cooling Method ONAN / ONAF
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
Low Voltage Switchgear
Low Voltage Switchgear Data Sheet
| Parameter Category |
Technical Parameter |
Specification Range / Typical Value | Unit | Remarks / Standard |
| Rated Voltage | Ur | 380 / 400 / 415 / 690 / 1000 | V | IEC 61439-1 |
| Rated Current (Main Busbar) | In | 630 / 1000 / 1600 / 2500 / 3200 / 4000 / 6300 | A | Copper busbar |
| Rated Short-time Withstand Current | Icw | 25 / 36 / 50 / 65 / 80 / 100 | kA | 1s or 3s duration |
| Peak Withstand Current | Ipk | 52.5 / 75.6 / 105 / 143 / 176 / 220 | kA | Peak value |
| Rated Short-Circuit Breaking Capacity | Icu / Ics | 25 / 36 / 50 / 65 / 85 / 100 | kA | ACB & MCCB |
| Frequency | f | 50 / 60 | Hz | Standard |
| Protection Degree | IP Code | IP30 / IP31 / IP40 / IP54 / IP65 | - | Indoor / Outdoor |
| Form of Separation | Form | Form 2 / Form 3 / Form 4 (Type 1-7) | - | IEC 61439-2 |
| Internal Arc Classification | IAC | AFL / AFLR up to 100kA / 1s | - | Optional |
| Operating Mechanism | - | Fixed / Withdrawable / Plug-in | - | ACB, MCCB, MCB |
| Mechanical Endurance | - | 10,000 – 30,000 | Operations | Circuit Breakers |
| Ambient Temperature | - | -5°C to +40°C (Special: -25°C to +50°C) | °C | Standard operation |
| Installation Type | - | Floor Standing / Wall Mounted / Mobile | - | Customizable |
| Smart Features | - | Modbus, Profibus, IEC 61850, Energy Monitoring | - | Optional |
Customization Optional
Low Voltage Switchgear
Our low voltage switchgear offers extensive customization capabilities to perfectly match project-specific requirements. Clients can choose between fixed-type, withdrawable, or plug-in configurations, along with various compartment separations from Form 2 up to Form 4b. We provide flexible busbar systems in copper or aluminum with different plating options (tin, silver) and current ratings tailored to exact load demands. Protection devices such as Air Circuit Breakers (ACB), Molded Case Circuit Breakers (MCCB), and Motor Protection Circuit Breakers can be selected from leading brands or integrated with customer-preferred components. Additionally, we offer custom enclosure dimensions, door layouts, cable entry points (top/bottom), and color schemes to blend with site aesthetics.
Advanced customization includes intelligent motor control centers (MCC) with variable frequency drives (VFD), soft starters, PLC integration, and power quality analyzers. For harsh environments, we provide enhanced corrosion-resistant coatings, IP65 enclosures, and anti-condensation heaters. Safety enhancements like arc-flash mitigation systems, infrared windows, and remote operation capabilities are available. Our engineering team collaborates closely with clients to develop fully tailored LV switchgear solutions that optimize space utilization, operational efficiency, and future expansion needs while ensuring full compliance with IEC 61439, GB/T 7251, and local standards.
Packing and Shipping
Low Voltage Switchgear
We maintain strict protocols for packing and shipping low voltage switchgear to ensure equipment arrives in optimal condition. Each LV switchgear panel is securely packed using strong wooden crates or steel-reinforced pallets with comprehensive cushioning materials to absorb shocks and vibrations. Sensitive components such as circuit breakers, relays, and metering devices are individually wrapped with protective films and foam inserts. Anti-moisture desiccant bags and corrosion inhibitors are placed inside enclosures to protect against humidity during long journeys. All packages feature clear hazard labels, handling instructions, and QR codes for traceability.
Our shipping solutions are customized according to destination and urgency. Domestic deliveries use specialized trucks with hydraulic loading systems, while international shipments are arranged via sea containers (20ft/40ft) or air freight for time-critical projects. We partner with experienced logistics providers who specialize in electrical equipment transportation, ensuring compliance with all export regulations and proper documentation. Full insurance coverage is provided for every shipment to protect against potential transit risks.
Pre-shipment inspections are conducted to verify packaging integrity, and containers are sealed under supervision. Real-time GPS tracking allows customers to monitor their orders throughout the journey. For large projects, we offer consolidated shipping and Just-In-Time delivery options to minimize on-site storage needs. Upon arrival, detailed unpacking manuals and optional technician guidance are available to support smooth installation. Our sustainable packing approach includes recyclable materials and returnable crates where feasible.
Safety and reliability remain our top priorities. We perform vibration and drop tests on packaging designs regularly to improve protection standards. Customers benefit from dedicated project coordinators who handle customs clearance, delivery scheduling, and after-sales support. This meticulous packing and shipping process ensures your low voltage switchgear reaches the destination safely, ready for immediate deployment with minimal risk of damage.
Our shipping solutions are customized according to destination and urgency. Domestic deliveries use specialized trucks with hydraulic loading systems, while international shipments are arranged via sea containers (20ft/40ft) or air freight for time-critical projects. We partner with experienced logistics providers who specialize in electrical equipment transportation, ensuring compliance with all export regulations and proper documentation. Full insurance coverage is provided for every shipment to protect against potential transit risks.
Pre-shipment inspections are conducted to verify packaging integrity, and containers are sealed under supervision. Real-time GPS tracking allows customers to monitor their orders throughout the journey. For large projects, we offer consolidated shipping and Just-In-Time delivery options to minimize on-site storage needs. Upon arrival, detailed unpacking manuals and optional technician guidance are available to support smooth installation. Our sustainable packing approach includes recyclable materials and returnable crates where feasible.
Safety and reliability remain our top priorities. We perform vibration and drop tests on packaging designs regularly to improve protection standards. Customers benefit from dedicated project coordinators who handle customs clearance, delivery scheduling, and after-sales support. This meticulous packing and shipping process ensures your low voltage switchgear reaches the destination safely, ready for immediate deployment with minimal risk of damage.
32
32 years of industry experience
Manufacturer Test
Low Voltage Switchgear
Progress Test
The Low Voltage Switchgear undergoes a comprehensive multi-stage production testing program designed to maintain strict quality control and electrical safety throughout the assembly process. The testing procedure begins with enclosure structural verification, dimensional tolerance analysis, busbar positioning inspection, and coating thickness measurement to ensure mechanical durability and environmental protection performance under industrial operating conditions. Electrical verification procedures include dielectric testing, secondary circuit simulation, relay protection logic inspection, breaker synchronization testing, and communication protocol verification. Functional simulations are performed to evaluate switchgear response under overload, short-circuit, earth fault, and emergency shutdown conditions. Metering systems, intelligent monitoring devices, and automatic transfer functions are additionally tested to ensure operational stability and accurate data transmission.
Design Tests
All transformers will be tested after finishing the production, test items as follows:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph / Phase Relation, 3-Ph (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Factory Acceptance Test
The Factory Acceptance Test for transformer-integrated Low Voltage Switchgear systems is conducted to verify electrical performance, insulation reliability, and operational safety before shipment. All testing procedures are performed using calibrated instruments and certified inspection methods according to IEC, ANSI, IEEE, and project-specific technical standards. Mechanical and thermal inspections include cooling system verification, oil leakage inspection, radiator installation checks, tap changer operation testing, and structural integrity assessment. Transformer insulation oil may additionally undergo dielectric strength analysis, dissolved gas analysis, and moisture content testing to ensure insulation quality and long-term operational reliability. Noise level testing and grounding inspections are also performed to verify stable operating characteristics and environmental compliance.
Routine Test - Insulation Resistance & Contact Resistance Test
Purpose of Testing
Evaluate the integrity of the main circuit insulation and contact connections. Identify potential defects such as moisture ingress, aging, or contamination in the insulation system, and verify that contact resistance is within acceptable limits to prevent overheating.
Testing Equipment
For Insulation Resistance: Megohmmeter (typically 2500V or 5000V DC).For Circuit Resistance: Micro-ohmmeter (DC resistance tester) or Precision DC current source.Auxiliary Tools: Thermometer/hygrometer (for temperature correction).
Pre-Test Preparation
Ensure the switchgear is de-energized, isolated, and properly grounded. Clean the test terminals and bushings to remove dust or moisture. For insulation tests, discharge all capacitive loads (cables, busbars) thoroughly through the grounding switch or shorting links.
Test Progress
1. Insulation Test: Connect the megger leads to the busbar phases and ground. Apply the test voltage (e.g., 2500V DC) and hold for 1 minute.2. Circuit Resistance Test: Connect the micro-ohmmeter current leads to the main busbar or circuit breaker terminals. Pass a low DC current (e.g., 100A) and record the voltage drop.
Temperature Correction
Correct the measured insulation resistance to a standard reference temperature (typically 20°C) using the appropriate exponential formula to ensure compliance with standards across different ambient conditions.
Circuit Resistance Test
Connect the tester leads to the main busbar or circuit breaker terminals. Pass a low DC current (e.g., 100A or 200A as per standard) and accurately record the voltage drop across the connection point. Ensure the equipment is energized only if it complies with specific hot-line testing safety protocols, otherwise perform cold-resistance measurement after de-energization
Mechanical Characteristic Test
Purpose: To verify the operational performance and timing of the circuit breaker mechanism, ensuring compliance with speed and travel requirements for arc extinction.Procedure: Use a dedicated Circuit Breaker Mechanical Tester. Connect the tester to the control circuit (closing/opening coils) and the secondary side of the travel transducer. Perform several opening and closing operations without load. Record key parameters: Opening/Closing time, Synchronization between three phases, Travel distance, Overshoot, and Contact pressure.
Power Frequency Withstand Test (AC Hipot)
Purpose: To validate the integrity of the main insulation system under high voltage stress.Equipment: AC high voltage test set.Procedure: Energize the equipment and apply the specified power frequency test voltage (e.g., 42kV for 1 minute for 10kV switchgear) between phases/inter-phase and ground. Monitor the leakage current. The test is considered passed if the insulation does not break down and the current remains stable within the standard limit. (Note: This is a destructive test; perform only on de-energized and properly discharged equipment).
Partial Discharge (PD) Measurement
Purpose: To identify internal insulation defects such as voids, cracks, or contamination that are not detectable by insulation resistance tests.Procedure: Inject the test voltage up to 1.3~1.5 times the rated voltage. Use a PD detector connected to the coupling capacitor or directly to the test object to measure the apparent charge (pC). Ensure the background noise level is below the detection threshold. Analyze the PD patterns to locate the faulty chamber.
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Low voltage switchgear is widely used in commercial office buildings for reliable power distribution, manufacturing plants for motor control centers, data centers requiring uninterrupted power supply, and hospitals for critical medical equipment protection. It also serves shopping malls, educational campuses, and residential high-rise buildings effectively.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
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What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
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What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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