Passive Harmonic Filters THDi 5% Widely Used In Variable Frequency Drive System

Short Description:

The passive harmonic filter uses the principle of electromagnetic induction and reactor, selects the filter capacitor with high performance and the filter device with high linearity, and combines the filter compensation system to absorb the main harmonic components in the system and compensate the reactive power at the same time.

The function of dynamic reactive power compensation and filtering is integrated into one, which can quickly follow the load change, and has three main functions: suppressing current fluctuation, absorbing harmonic and compensating reactive power. It is used to reduce non-sine wave current generated by inverters, servo drives, UPS, etc., in industrial power grids.

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Features

Modern electrical equipment imposes stringent demands on voltage stability and power quality. The power network has to be free from harmonics and other electrical disturbances. This is why Noker passive harmonic filter has come into being. Noker harmonic filters have been specially designed to eliminate the harmonics from the current absorbed by 6-pulse power converters, such as frequency inverter for motors, UPS, etc.,

These are essentially passive filters based on a series-parallel combination of inductaces and capacitors, adapted to filter the input of power converters.

1. Rreduction of the current wave's distortion towards the network and the rest of the installation

2. Compliance with the IEC 61000-3-4, IEC 61000-3-12, IEC 61800-3 and IEEE-519

3. Energy savings with the reduction of the root mean square current(RMS), thus reducing the kV*A demand

4. Less strain on equipment and increase of the working life of units above this location with the corresponding reduction of thermal losses generated

5. Limits current transients, preventing damages caused to the converter and overvoltage trips that affect production processes

6. Lower maintenance costs and saving cost for replacing worn-out machines

Specification

Main characteristics
Norminal system voltage(ph-ph)	3*380 to 500Vac,(Others on request)
Frequency	50hz(60hz on request)
Rated load power(P)	See table
Overload	1.5 times rated current 1min
Rated current	See table
Residual THD	≤5% at full load
Voltage drop at rated current	＜2%
Degree of protection	IP00 indoor(IP20/54 on request)
Ventilation	Natural
Mounting	On the floor
Operating temperature	Ambient:-25℃--50℃
Relative humidity	80%

Technical

Filter Model	System Voltage	Rated Power @ 400VA	Rated Current @400VAC (A)	Insulation Class	Weight (kg)
SKS-OSK-0003-4A5/05	3x380 to 500VAC	1.5	3	H	9
SKS-OSK-0005-4A5/05	3x380 to 500VAC	2.2	5	H	11
SKS-OSK-0008-4A5/05	3x380 to 500VAC	3.7	8	H	18
SKS-OSK-0011-4A5/05	3x380 to 500VAC	5.5	11	H	23
SKS-OSK-0014-4A5/05	3x380 to 500VAC	7.5	14	H	24
SKS-OSK-0020-4A5/05	3x380 to 500VAC	11	20	H	38
SKS-OSK-0027-4A5/05	3x380 to 500VAC	15	27	H	40
SKS-OSK-0031-4A5/05	3x380 to 500VAC	18.5	31	H	52
SKS-OSK-0038-4A5/05	3x380 to 500VAC	22	38	H	57
SKS-OSK-0052-4A5/05	3x380 to 500VAC	30	52	H	66
SKS-OSK-0064-4A5/05	3x380 to 500VAC	37	64	H	72
SKS-OSK-0082-4A5/05	3x380 to 500VAC	45	82	H	89
SKS-OSK-0100-4A5/05	3x380 to 500VAC	55	100	H	105
SKS-OSK-0129-4A5/05	3x380 to 500VAC	75	129	H	154
SKS-OSK-0154-4A5/05	3x380 to 500VAC	90	154	H	158
SKS-OSK-0188-4A5/05	3x380 to 500VAC	110	188	H	194
SKS-OSK-0224-4A5/05	3x380 to 500VAC	132	224	H	209
SKS-OSK-0275-4A5/05	3x380 to 500VAC	160	275	H	210
SKS-OSK-0316-4A5/05	3x380 to 500VAC	185	316	H	218
SKS-OSK-0341-4A5/05	3x380 to 500VAC	200	341	H	255
SKS-OSK-0375-4A5/05	3x380 to 500VAC	220	375	H	275
SKS-OSK-0431-4A5/05	3x380 to 500VAC	250	431	H	295
SKS-OSK-0489-4A5/05	3x380 to 500VAC	280	489	H	325
SKS-OSK-0552-4A5/05	3x380 to 500VAC	315	552	H	335
SKS-OSK-0629-4A5/05	3x380 to 500VAC	355	629	H	385
SKS-OSK-0730-4A5/05	3x380 to 500VAC	400	730	H	410
SKS-OSK-0787-4A5/05	3x380 to 500VAC	450	787	H	495
SKS-OSK-0852-4A5/05	3x380 to 500VAC	500	852	H	503
SKS-OSK-0963-4A5/05	3x380 to 500VAC	560	963	H	572
SKS-OSK-1174-4A5/05	3x380 to 500VAC	630	1174	H	668

Application

The passive harmonic filter can be widely used as below:

Dc fast charging device

Heating ventilation and air conditioning unit

Exhaust air and pump system

Industrial automation and robotics equipment

Ac and DC motor drives, inverters

A device with a front six-pulse rectifier

Customer service

1. ODM/OEM service is offered.

2. Quick order confirmation.

3. Fast delivery time.

4. Convenient payment term.

At present, the company is vigorously expanding overseas markets and global layout. We are committed to becoming one of the top ten export enterprises in China’s electrical automatic product, serving the world with high-quality products and achieving a win-win situation with more customers.