Dry Air Core Reactor

1. Features
(1)Technical advancement
Sophisticated technology of dry air core reactor creates more value for users.

Our dry air core reactor is manufactured by advanced technology. It is oil-free and inflaming retarding, and thus avoids oil leakage and flammability of oil-immersed type reactor to ensure safe operation. There is no iron core or saturation of iron in our dry air core reactor, which has inductance with fine linearity.
Rongxin dry air core reactor is small in size, maintenance free and is with light weight, low noise, low loss, and flexible installation. Besides, it saves considerable time cost, manual cost and material cost for its users.

(2)Reliability
Reliable operation of dry air core reactor can last over 20 years.
As our reactor is coated with anti-ultraviolet organic silicon varnish, it has strong resistance to outdoor climatic conditions and long service life of over 20 years. With parallel wrapping of multi-stranded small bore wires, the dry air core reactor effectively lowers the eddy current loss, and boasts strong insulation and reliable performance.
(3)Stability
Sophisticated heat dissipation technology guarantees good performance of the dry air core reactor for users.

The dry air core reactor has optimum structural parameters. When the reactor calculates the temperature, it relates to the maximal temperature of hot point and leaves a margin to ensure long-lasting safe operation.
Coils are enveloped by single stable-fiber yarn of dipping epoxy resin. Hence, the dry air core reactor features good overall winding, high mechanic strength, high dynamothermal stability and low noise.

With polyester glass fiber puller between coils as the axial airway for heat discharge, the dry air core reactor has good heat dissipation.

2. Field of application
The dry air core reactor has wide application in power, induction furnace, speed control device, communications, harmonic waves, etc. It has been an indispensable component in power grid at all levels and electrical products.

The dry air core reactor can be applied to the following fields.
A. Speed regulation devices such as variable frequency speed controller and DC speed regulator, etc.
B. Uninterruptible power systems, UPS, for example.
C. Equipment like induction heating, induction smelting and induction welding, etc.
D. Processing units in laser processing equipment.
E. Power source in computers, office facilities and communication equipment, etc.
F. Large rectifying device.

3. Classification and function
There are series connection and parallel connection of the dry air core reactor. Reactors with series connection usually serve to limit current, while reactors with parallel connection are generally used for reactive power compensation. The following are a list of common dry air core reactors.
Parallel reactor
Parallel reactors are connected at the third coil of transformer in super high voltage long distance power transmission system. They are used to compensate the capacitive charging current and control voltage rise and switching overvoltage of the power system. Therefore, insulation level can be reduced and safe and reliable operation of the wires is guaranteed. Series reactor
The series reactor is equipped in the circuit of capacitor to prevent striking current. Besides, it couples with condenser bank to form harmonic loop and serves to filter specific harmonic waves.
Current-limiting reactor
The current-limiting reactor is used to prevent short-circuit current, and reduce it to the allowable current.
Neutral earthing reactor
The neutral earthing reactor prevents harmonic waves from entering the power system, and saves the equipment from damage by harmonics.
Filter reactor
The filter reactor is usually connected in series with the circuit of capacitor. It provides a low-impedance passage for a certain number of harmonic, thus averting excessive harmonic waves.
Split reactor
Split reactor is connected in series in the power system to avoid fault current. When in normal operation, the split reactor has low impedance. Once something goes wrong, the split reactor will present higher impedance.
Phase controlled reactor
The phase controlled reactor is applied in thyristor controlled fast Static Var Compensator (SVC).
Balancing reactor
The balancing reactor, together with induction furnace and capacitor, combines to provide balanced load of three phase supply.
Starting reactor
The starting reactor is used for reduced voltage starting of AC motor.
Smoothing reactor
The smoothing reactor is applied to HVDC and high power DC electric drives. It functions to reduce the pulsating current component and ensure stable DC.

4. Conditions of use
Place of use: indoors or outdoors
Height above sea level: ≤1,000m
Temperature: -40~+45℃
Relative humidity: ≤90%
Wind speed: <35m/S
Earthquake intensity: ≤8 magnitude