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Low Voltage Dynamic Reactive Power Compensation Cabinet - China Suppliers & Factory for Optimal Power Quality
General
The low voltage dynamic reactive power compensation cabinet adopts a contactless switch, which is controlled by a dynamic reactive power compensation controller, tracks the rapid changes in reactive current, and switches multiple sets of capacitors quickly and frequently to maintain the optimal power factor, thereby minimizing line losses and increasing the effective output capacity of distribution transformers, optimizing power quality.
This cabinet has a very significant effect on stabilizing system voltage, improving power factor, and enhancing transformer carrying capacity. It is particularly suitable for fast tracking compensation of frequent and impulsive composite.
Service Conditions
1
Altitude: ≤ 2000m
2
Ambient temperature: -40℃～+45℃
3
Relative humidity: ≤ 90%
4
The surrounding environment is free of corrosive gases, conductive dust, and flammable and explosive media
5
The installation site should have no severe vibrations or bumps, and the installation inclination should not exceed 5 degrees
※ Note: If there are special environmental conditions, please consult with our company when placing an order.
Standards
| IEC 439 | Low voltage switchgear and control gear equipment |
| IEC144 | AC High Voltage Contactor |
| GB3906 | Metal enclosed switchgear |
| GB-11022 | General Technical Conditions for High Voltage Switchgear |
| GB311.1-311.6 | Insulation Coordination for High Voltage Transmission and Transformation Equipment |
| GB763 | Heating of AC High Voltage Electrical Appliances during Long Term Operation |
| GB2706 | Dynamic Stability of High Voltage Electrical Appliances |
| GB7252 | Low Voltage Switchgear |
Structural Characteristics
Main Components
Includes air switches (or knife switches), capacitors, reactors, fuses (or small circuit breakers), contactless switches, and dynamic controllers; Compact structure and innovative layout.
Real-time Observation
Equipped with controllers, ammeters, voltmeters, and signal lights on the panel for users to observe system status in real time.
Robust Construction
Cabinet made of high-quality cold-rolled steel plate (or stainless steel) with spray coating for strong anti-corrosion. Galvanized steel internal framework ensures long-term resistance.
Complete Protection
Includes short circuit, overload, over-voltage, under-voltage, and phase loss protection. Automatically shuts down during external faults and resumes after power transmission.
Reactive Rate Options
Available options: 6%, 7%, 12%, 14%.
Technical Parameter
1
Rated voltage: 380V, 660V
2
Rated frequency: 50Hz/60Hz
3
Rated compensation capacity: 30-800kvar
4
Operating voltage range: 0.8-1.1Un
5
Compensation methods: co compensation, split compensation, mixed compensation
6
Measurement error: Voltage: ± 0.5%, Current: ± 1.0%, Reactive power: ± 1.0%
7
Maximum allowable overcurrent: 1.30 times constant current
8
Control circuits: 1-16 circuits
Product Features
Fast Switching Speed
Dynamic response time ≤ 20ms. After the capacitors in the same group exit, the device can be restarted without delay (completed within one cycle).
Significant Compensation Effect
The controller adopts closed-loop control, which compensates in one go according to the system voltage and reactive power.
Full Protection Function
With protection against over-voltage, under-voltage, short circuit, phase loss, temperature exceeding limit, etc.
Automatic Operation
The device can automatically exit operation in case of external faults and power outages, and automatically resume operation after power transmission.
Ordering Notice
Determine the rated capacity of the transformer, the rated voltage on the secondary side, and the transformation ratio of the secondary side current transformer.
Determine the reactive load condition and natural power factors, as well as the total operating current and fluctuation range of the compensated system and equipment.
Whether the load characteristics are impact loads, fluctuating loads, or conventional steady-state loads.
Device model, type, and total capacity.
When the device is an outdoor type, indicate the material used: ordinary steel/stainless steel; And the color of the body.
If there are special requirements, they should be specified in detail.
Frequently Asked Questions
What is the primary function of the low voltage dynamic reactive power compensation cabinet?
It tracks rapid changes in reactive current and switches multiple capacitor sets via a contactless switch. This optimizes power factor, stabilizes system voltage, minimizes line losses, and enhances the carrying capacity of distribution transformers.
What is the dynamic response and switching speed of this equipment?
The cabinet features a rapid dynamic response time of ≤ 20ms. When a capacitor group exits, the system can restart it within one cycle without delay.
What safety and protection functions are integrated into the cabinet?
It features complete protection mechanisms including short circuit, overload, over-voltage, under-voltage, phase loss, and over-temperature protection. It automatically shuts down during external faults and resumes when power is restored.
What are the standard ambient conditions required for installation?
The standard conditions include an altitude of ≤ 2000m, temperatures between -40℃ and +45℃, and relative humidity ≤ 90%. The site must be free of corrosive/explosive media and have an installation inclination of no more than 5 degrees.
What details should be provided when placing an order?
Customers should specify the transformer capacity, secondary voltage, current transformer ratio, reactive load conditions, load characteristics (steady, impact, or fluctuating), device model, total capacity, and housing material/color for outdoor installations.