فارسی
Motor start capacitors

Rahshad Electic Company (Private Joint Stock) has been active in the field of manufacturing capacitor (permanent run) and lighting capacitor as of year 2004, now, considering the industrial requirements of our beloved land, we have added motor start capacitor into our products portfolio. Offering new products with respect to the state-of-the-art standards related to the product and quality management system to enable meeting the needs of different industries clearly indicate the production and technical capabilities of this company.




Application

Motor start capacitors are applied with in-series connections in single-phase inductive motors to enhance the primary start-up momentum power. A big part of the needed high power reactive shall be compensated and further ease commissioning within less than a second up to maximum a couple of seconds. In order to start up the single-phased inductive motors softly, the primary start-up momentum shall be increased and the invasive flow shall be decreased.

Technical Specifications:

 

Nominal voltage

110-330 VAC

Nominal frequency

50-60 HZ

Capacity

50-1,000 μF

Capacity tolerance

±10%

Workplace temperature

-40 Cº/  +70 Cº

Performance cycle

+70 Cº, 110-165 VAC, one second on, 59 seconds off, AB 1.70% ED

+70 Cº, 220-330 VAC, one second on, 59 seconds off, AB 1.70% ED

Body

Heat and explosion resistant polyamide plastic materials

Electrical connection

Terminal and cable

Pressure releasing test

With surety valves preventing capacitor explosion due to applying improper voltage

Intra-terminals voltage test

Applying 1.2 times of nominal voltage for 2 seconds with electrical discharge or break

Terminal and body voltage test

Applying 2,000 VAC for 60 seconds with electrical discharge or break

Sealing

Ultrasound welding with respect to the latest global technology with the capability to tolerate capacitor explosion

Through embedding two capacitors (start-up switching and run capacitors), the aforementioned advantage may be achieved. Often, start-up switching capacitor with a capacitor capacity of roughly a couple of times of the motor run capacitor, shall be discarded from the circuit after the motor reaches the nominal RPM and the motor run capacitor shall still remain in the circuit in the auxiliary coil in series connection. These capacitors are used in order to decrease the capacitor size and establishing high capacitor capacity values. Capacitor elements are produced from aluminum foils and loaded paper layers, saturated inside liquid electrolyte. The capacitor body has been made from heat resistant plastic materials. Some of the applications of electrolyte motor start capacitors include the following:

 

·        Assisting in starting up the LV compressors, including but not limited to compressors of fridges and air conditioners,

·        Facilitating starting up the HP motors, e.g. ¾ HP (horse power) and industrial lift engines,

·        Applications in various types of heavy agricultural machinery, mills, heating/cooling systems for residential and commercial purposes.

 

Advantages of using Rahshad Motor Start Capacitors

1.     Keeping IEC 60252-2 international standard

2.     Variable capacity scope with smallest possible sizes

3.     Existence of valve and highly secure sealing

4.     Proper quality and reasonable price

 

Important points

-         Electrolyte capacitors kept for long terms may be broken and lose their quality. They have a maximum expiry term of two years, after which the capacitors shall be inspected prior to be put into operation. In case of unavailability of testing means for the client, nominal voltage for 2 or 3 seconds and three times shall be repeated, while the same shall not exceed 10 seconds.

-         Capacitor capacity and power factor measuring shall be made by taking benefit from the following circuit.

Rahshad Electric Co, All Rights Reserved.Design By Moballeghan Group.