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Dynamic Reactive Power Compensation Cabinet - China Suppliers and Factory for Low Voltage Applications
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
1
The main components inside the compensation cabinet include air switches (or knife switches), capacitors, reactors, fuses (or small circuit breakers), contactless switches, and dynamic controllers; Compact structure and innovative layout.
2
There are controllers, ammeters, voltmeters, signal lights, etc. on the panel for users to observe in real time.
3
The cabinet is made of high-quality cold-rolled steel plate (or stainless steel) with good flatness, and the outer surface is treated with spray coating, which has strong anti-corrosion ability; The internal framework is made of galvanized steel plate to ensure good corrosion resistance.
4
Complete protection functions: including short circuit, overload, over-voltage, under-voltage, and phase loss protection; Convenient setting of various parameters; When there is an external fault, it will automatically shut down and resume operation after power transmission.
5
Reactive rate options: 6%, 7%, 12%, 14%.
Technical Parameter
Electrical Specifications
Rated Voltage: 380V, 660V
Rated Frequency: 50Hz/60Hz
Operating Voltage Range: 0.8-1.1Un
Rated Frequency: 50Hz/60Hz
Operating Voltage Range: 0.8-1.1Un
Compensation & Control
Rated Capacity: 30-800kvar
Control Circuits: 1-16 circuits
Methods: Co / Split / Mixed Compensation
Control Circuits: 1-16 circuits
Methods: Co / Split / Mixed Compensation
Performance Limits
Max Overcurrent: 1.30 times constant current
Measurement Error:
Voltage: ± 0.5% | Current: ± 1.0% | Reactive: ± 1.0%
Measurement Error:
Voltage: ± 0.5% | Current: ± 1.0% | Reactive: ± 1.0%
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
1
Determine the rated capacity of the transformer, the rated voltage on the secondary side, and the transformation ratio of the secondary side current transformer.
2
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.
3
Whether the load characteristics are impact loads, fluctuating loads, or conventional steady-state loads.
4
Device model, type, and total capacity.
5
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, should be specified in detail.
Frequently Asked Questions (FAQ)
What is the primary function of the low voltage dynamic reactive power compensation cabinet?
It tracks rapid changes in reactive current and switches capacitor sets dynamically to maintain an optimal power factor, reduce line losses, stabilize system voltage, and maximize transformer capacity.
What is the response time for the capacitor switching?
The cabinet features a rapid dynamic response time of ≤ 20ms. Capacitors can be switched and restarted without delay within a single cycle.
What safety and protection features are built into the cabinet?
It includes full protection systems for short circuits, overloads, over-voltage, under-voltage, phase loss, and over-temperature limits, with automatic shutdown and recovery features.
Can this cabinet operate in extreme temperatures?
Yes, the standard ambient operating temperature range is -40℃ to +45℃, making it suitable for varying environmental conditions.
What information is needed to place an order?
We require the transformer's capacity and secondary side voltage, load characteristics (impact or conventional), system current range, required cabinet model/capacity, and whether it is for indoor or outdoor installation.