The 3 Phase 500KVA SCR Static AVR is a high-capacity digital contactless voltage stabilization device tailored for modern industrial parks and precision manufacturing zones. With a rated capacity of 500KVA and output current of 760A, it adopts DSP digital control and SCR fast compensation technology to achieve ±1% high-precision voltage regulation within 10–40ms response time.
Beyond basic voltage fluctuation correction, the unit provides passive harmonic isolation to suppress grid distortion caused by nonlinear loads and supports data interconnection with park EMS, APF and SVG systems, realizing systematic power quality optimization for industrial power distribution systems.
| Model | SBWZ-500KVA |
|
Parameter |
Value |
|
Nominal Power |
500KVA |
|
Technology |
DSP controlled circuit with SCR switch technology and EI power transformer. |
|
Phase |
Three Phase (3 phase 5 wires, L1, L2,L3, Neutral, Grounding) |
|
Input Voltage |
3phase 380V/400V/415V±20% ( wider range is available subject to special request and higher cost) |
|
Output Voltage |
3phase 380V /400V/415V |
|
Output Current |
760A |
|
Output Precision |
Phase voltage: ±1% ,Line voltage: ±1.5% |
|
Frequency |
50/60Hz |
|
Efficiency |
≥99% |
|
Isolation Grade |
GradeE |
|
Dielectric Strength |
AC 2500V/1min no flashover, no break down |
|
Response speed |
10ms～40ms |
|
Waveform Distortion |
<0.1% output waveform distortion,No Incremental Harmonic |
|
Temperature rising |
Net Temperature rising: <60℃ |
|
Regulation method |
Seperative regulation of each phase, automatic balance phase output |
|
Display |
Digital LED display, display real time phase voltage, phase current, power. |
|
Programmable setting |
user programmable setting for over voltage, under voltage, over current, and regulation precision. |
|
Protection |
overload,high voltage, low voltage, short circuit, over heat protection,lack p[hase protection,bypass function |
|
Cooling Method |
Intelligent cooling fan |
|
Operation Temperature |
-5℃～40℃ |
|
Relative Humidity |
<90% |
|
Dimension(mm) |
900*900*1650 |
|
Net Weight(kgs) |
886 |
|
Remarks: |
The above specifications are based on factory standard specifications, customized designs are available subject to confirmation. |
Rated capacity 500KVA, output current 760A. 3 Phase 500KVA SCR Static AVR can be directly installed at the incoming side of the park's main distribution or large workshop's substation, providing centralized voltage stabilization protection for the entire distribution bus (covering dozens of devices and thousands of square meters of production area).
When the superior power grid experiences voltage sags or voltage fluctuations caused by the startup of large equipment groups in the park, SBWZ-500KVA can complete compensation within milliseconds, preventing power fluctuations from spreading throughout the park and ensuring the continuity of power supply for all connected devices.
Through the electromagnetic coupling effect of the isolation transformer, it has a 30% to 50% attenuation effect on the characteristic harmonics (5th, 7th, 11th, etc.) generated on the load side. When used in conjunction with active power filters (APF), it can achieve overall harmonic management compliance for the park.
Based on a 500KVA capacity and an average annual load rate of 60%, SBWZ-500KVA can save approximately (500 × 0.6 × 4% × 8760) ≈ 105,000 kWh of electricity per year compared to traditional servo-type voltage stabilizers (with an efficiency of 96%). For large parks, each device can save approximately 70,000 to 80,000 yuan in electricity costs per year (based on an industrial electricity price of 0.7 yuan per kWh), with significant economic benefits.
No carbon brushes, no servo motors, no mechanical wear, eliminating the risk of power interruption caused by mechanical failures in traditional voltage stabilizers. For industrial parks requiring power supply reliability of 99.99%, this feature is crucial.
Standard RS485 communication interface (Modbus-RTU), expandable to Ethernet communication. Real-time upload of three-phase voltage, current, power, harmonic distortion rate, etc. data to the EMS platform, working in coordination with the front-end reactive power compensation devices (SVG, capacitor banks) and APF to build a complete power quality closed-loop management system.
1. High-tech Industrial Park: Provides centralized power quality management for the low-voltage bus of the main distribution room in the park, ensuring the power supply quality for enterprises such as information technology, biomedicine, and precision instruments within the park.
2. Main Distribution System of Large Manufacturing Factory: Installed on the side of the factory's main incoming cabinet, 3 Phase 500KVA SCR Static AVR provides voltage stability and harmonic isolation protection for the entire factory area (covering multiple workshops).
3. Semiconductor and Panel Manufacturing: Provides factory-wide voltage stabilization protection for the plant systems (MAU, FFU, chiller units, air compressor groups) of wafer factories and panel factories, ensuring the stability of environmental parameters in clean workshops.
4. New Energy Industrial Base: Used for the power distribution systems of photovoltaic module factories and lithium battery super factories, eliminating voltage fluctuations caused by the large-scale start-stop of production equipment on the production lines, and ensuring the stable operation of automated production lines.
5. Microgrid Node of Industrial Park: Acts as the voltage stabilization hub in the park's microgrid (photovoltaic + energy storage + charging stations), coordinating the supply and demand balance between distributed power sources and loads.
KTAC provides comprehensive OEM/ODM customization for the SBWZ-500KVA to meet specific project requirements, facility conditions, and brand specifications.
Voltage Configuration:Input voltage range (standard ±20%, wider available upon request) and output voltage (380V/400V/415V) factory-set to match your distribution system.
Enclosure & Protection:Standard IP20 for indoor installation; IP54 upgrade available for outdoor or dusty environments, with optional sun-shield, thermal insulation, and heating/dehumidification modules.
Communication & Monitoring:RS485 (Modbus-RTU) standard; optional Ethernet, Profibus-DP, or industrial IoT modules for integration with EMS, SCADA, or DCS platforms.
Functional Modules:Built-in EMI filtering, surge protection (SPD), or dedicated APF/SVG coordination interfaces can be integrated upon request.
Parallel Operation:Redundant parallel configurations (2 or 3 units) with load-sharing and automatic failover, engineered for mission-critical applications requiring 99.99% availability.
Branding & Documentation:Custom color, logo printing, packaging design, and multi-language manuals tailored to your brand requirements.
· SBWZ-500KVA is responsible for voltage stability: it quickly compensates for voltage fluctuations and keeps the voltage within ±1%.
· APF is responsible for harmonic control: it dynamically compensates and filters the characteristic harmonics generated by the load.
· SVG is responsible for reactive power compensation: it quickly and dynamically compensates for the reactive power of the system, improving the power factor.
The three complement each other. SBWZ-500KVA uploads power quality data through the communication interface to the EMS platform, and EMS intelligently schedules the activation of APF and SVG based on the system status, forming a complete power quality closed-loop governance system.
The rated current of the three-phase 380V 500KVA is approximately 760A. It is recommended to configure a frame-type circuit breaker (ACB) with a capacity of no less than 1000A at the front end. The copper busbar for the incoming line is recommended to be of TMY 80×6mm or larger specifications, and the incoming cable is recommended to be 2 YJV 3×185mm² + 2×95mm² in parallel or a single YJV 3×300mm² + 2×150mm². The specific configuration needs to be calculated based on the actual distribution system diagram and the length of the line.
The standard SBWZ-500KVA is an indoor installation type (with protection level IP20). If outdoor installation (such as in a container-type distribution room or outdoor box-type substation) is required, the protection level can be upgraded to IP54 (for dust and splash protection), and additional sun protection, heat insulation layers, and heating dehumidification devices can be added. Please inform us of the installation environment conditions in advance.
Through a dedicated parallel control cabinet, two or three 500KVA stabilizers can be operated in parallel. The parallel system supports load distribution and redundancy backup - when one device fails or requires maintenance, the remaining devices can automatically take on all the loads. The parallel scheme needs to be determined during the project design stage. Please contact our system engineers for detailed configuration plans.
The net weight of SBWZ-500KVA is 886kg. During transportation, forklifts or lifting equipment are required. The bottom of the cabinet has standard forklift sockets and lifting rings. The foundation for installation should be poured with C30 concrete and reserved screw holes for equipment fixation. After the cabinet is in place, it needs to be leveled (with a tolerance of ±2mm/m), and then the copper busbars for incoming and outgoing lines should be connected.
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No. 82, Xiaotang Gongye Avenue, Shishan Town, Nanhai District, Foshan City, Guangdong Province, China
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