DR - three-phase compensating reactors (for PFC)

Three-phase DR-type reactors are designed to protect three-phase capacitors in power factor correction (PFC) installations from higher current harmonics. The reactors consist of three structurally combined windings assembled on imbricated core.

Download the questionnaire on reactors SEE SPECIFICATIONS

Description

operating conditions

specifications and prices

Advantages:
- extension of the service life of cosine PFC capacitors;
- reduction of harmonic distortion in the network;
- minimization of noise during operation of the PFC installation;
- the temperature sensor is included in the reactor design;
- easy installation.

Construction of the magnetic system of reactors of DR type – bar with clearance, with magnetic core, made of electrotechnical steel laminations, 2 non-magnetic clearances are located at the junction of the rod of each phase and yoke. Right-hand windings, material – aluminum. At customer's request, windings can be made of copper wire or bus.

In the middle winding of the reactor there is a thermal sensor KSD-9700 120 degrees, normally open. The outputs of the thermal relay are crimped into copper sleeves and inserted into the clamping screw block.

Parameters of DR reactors

Type of reactor	Voltage class	Mains frequency	Inductance	Rated current	Saturation current	Frequency offset factor
	V	Hz	mH	А	А
DR-12.5/0.4-134-6.46-18	400	50	6,46	18	25,2	134
DR-25/0.4-134-3.32-39	400	50	3,32	39	54,6	134
DR-50/0.4-134-1.62-72	400	50	1,62	72	100,8	134
DR-12.5/0.4-189-3.07-21.4	400	50	3,07	21,4	36,4	189
DR-25/0.4-189-1.53-41	400	50	1,53	41	69,7	189
DR-50/0.4-189-0.77-82	400	50	0,77	82	139,4	189

Transformer types designation.

Example of designation:

DR-25 / 0.4-134-3.32-39 - Three-phase reactor for power factor correction installations, for a 25 kVAr stage, voltage 0.4 kV, detuning frequency is 134 Hz, inductance is 3.32 mH, rated current is 39 A.

Mounting and overall dimensions.

Reactor type	Width	Length	Height	w	l	Weight
	mm	mm	mm	mm	mm	kg
DR-12.5/0.4-134-6.46-18*1.4	230	150	220	155	70	13
DR-25/0.4-134-3.32-39*1.4	295	170	260	225	105	25
DR-50/0.4-134-1.62-72*1.4	295	220	260	255	134	35
DR-12.5/0.4-189-3.07-21.4*1.7	230	150	220	155	70	13
DR-25/0.4-189-1.53-41*1.7	295	170	260	225	94	25
DR-50/0.4-189-0.77-82*1.7	295	200	260	225	117	30

* - изготовитель оставляет за собой право вносить изменения с целью улучшения качества продукции до согласования с заказчиком.

Figure № 1

The service life of reactors is 20 years.
The warranty period is 24 months from the date of sale, unless otherwise agreed with the customer. Reactors are impregnated in the insulating compound assembly by dipping method, or by vacuum impregnation method according to design documentation. The reactor is considered fit for operation only after passing all the points of acceptance tests.