Motor Run Capacitor

category: Cable/Wire/Tag, Flat/Round Housing, Home Applience Parts, Motor run Capacitors

Motor Run Capacitor:

The motor run capacitors manufactured by this company are produced using the latest technology and in accordance with the international standard IEC60252.

The dielectric of these capacitors is composed of polypropylene film (BOPP) in micron thicknesses and the capacitor plate which is made of a very thin metal coating (less than 0.3µm). In the vacuum environment, the alloy metal vapor is deposited on a polypropylene film and capacitor plates are formed.

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One of the biggest advantages of this technology is the dielectric self-healing feature of the capacitor, this means that, in case of insulation failure in the dielectric film, by producing local heat and evaporating of the metal layer in the area of insulation failure, the short circuit is removed and insulation failure is repaired.

The self-healing occurs in less than 0.01 second and according to the area of capacitor plate and the surface of the evaporated part; there is no significant reduction in capacitance.

Application:

The most important application of these capacitors is to start single-phase inductive motors and small three-phase asynchronous motors with single-phase supply.

Capacitor installation causes a phase difference and the required rotating magnetic field in the motors and provide the necessary torque, to cause the motor to rotate.

In selecting the nominal voltage of the capacitor, it should be noted that the applied voltage to the capacitor terminals is generally higher than the supply voltage.

In single-phase motors equipped with permanent working capacitors, the capacitor always remains in series with the auxiliary winding in circuit.

Capacitance should not be too high to prevent overload on the auxiliary winding.

The starting torque in these motors is usually 50 to 70% of the nominal value.

Motor efficiency is 90% of similar three-phase motors and the power factor is always close to one and there is no need to compensate.

Therefore, Rahshad capacitors which are designed and manufactured for this purpose have the ability to withstand high overload, low losses and high thermal stability. It is sometimes necessary to start a three-phase synchronous motor with a single-phase power supply. Small three-phase synchronous motors (with a power of less than 1.5 kW) can be connected to a single-phase grid by using a capacitor.

The capacitor can be moved on the motor capacitors to reverse the direction of motor rotation. The power obtained in this case is 70 to 80% of the three-phase nominal power and 25 to 30% of the nominal torque.

Technical specifications
Nominal Voltage	400 – 450 and 500 VAC (Other on request )
Nominal Frequency	50 ~ 60 Hz
Capacitance Tolerance	± 5 % & ± 10 % (Other on request)
Operating Temperature	– 25°C/+70°C & -25°C /+85°C
Life Expectancy	Class A: 30000 h Class B: 10000 h Class C: 3000 h Class D: 1000 h
Dissipation Factor	Less than 20 × 10^-4 at 50 Hz
Test Voltage Between Terminals	2 Un for 2 seconds
Test Voltage Between Terminals and Casing	2 kVAC for 2 seconds
Max. Permissible Over Voltage	1.1 Un
Max. Permissible Over Current	1.3 In (Nominal current)
Casing	Flame retardant materials according to the latest version of the standard
Electrical Connection	Wire, Cable, Single and Double tag, Cap
Mechanical Connection	M8 aluminum or plastic bolt, Without screw, Fast connection
Filling Material	Polyurethane resin
Environmental Compatibility	No Leakage and Non-PCB

Capacitor power in case of permissible overloads should not be more than 1.35 times the nominal power.

Round Capacitor								Flat Capacitor
Model	MRP 400-450VAC			Model	MRP 450-500VAC			Model	MFP 400-450VAC
Capacitance (µf)	Dimensions H * D (mm )	Qty per Box (pcs)	Weight Per each (gr) 5%±	Capacitance (µf)	Dimensions H * D (mm )	Qty per Box (pcs)	Weight Per each (gr) 5%±	Capacitance (µf)	Dimensions H * T * W (mm )	Qty per Box	Weight Per each (gr) 5%±
1	25 × 60	288	32	1	25 × 60	288	30	1	38 × 14 × 28	500	17
2	25 × 60	288	33	2	25 × 60	288	33	2	38 × 14 × 28	500	18
2.5	25 × 60	288	34	2.5	25 × 60	288	32	2.5	38 × 14 × 28	500	18
3	25 × 60	288	35	3	25 × 60	288	32	3	38 × 18 × 28	400	22
3.5	25 × 60	288	34	3.5	25 × 60	288	31	3.5	38 × 18 × 28	400	22
4	25 × 60	288	32	4	25 × 60	288	48	4	38 × 21 × 35	400	31
5	30 × 60	288	42	5	30 × 60	288	46	4.5	38 × 21 × 35	400	31
6	30 × 60	288	52	6	32 × 60	288	55	5	38 × 21 × 35	400	31
6.3	30 × 60	288	52	6.3	32 × 60	288	55	6	38 × 22 × 35	400	31
7	32 × 60	288	53	7	40 × 60	180	75
8	32 × 60	288	51	8	40 × 60	180	72
9	32 × 60	288	52	9	40 × 60	180	74
10	32 × 60	288	53	10	40 × 60	180	76
12	40 × 60	180	62	12	40 × 85	80	107
14	40 × 60	180	65	14	40 × 85	80	99
15	40 × 60	180	68	15	40 × 85	80	102
16	40 × 60	180	72	16	40 × 85	80	100
18	40 × 85	80	97	18	45 × 90	80	158
20	40 × 85	80	100	20	45 × 100	80	160
25	45 × 90	80	135	25	45 × 100	80	158
26	45 × 90	80	139	26	45 × 100	80	157
30	45 × 90	80	150	30	45 × 100	80	154
32	45 × 100	80	158	32	45 × 100	80	152
35	45 × 100	80	154	35	50 × 100	80	195
40	45 × 100	80	145	40	50 × 100	80	195
45	45 × 100	80	148	45	50 × 137	60	238
50	50 × 100	80	190	50	50 × 137	60	238
55	50 × 100	80	187	55	50 × 137	60	237
60	50 × 100	80	187	60	50 × 137	60	236
65	50 × 137	60	235	65	50 × 137	60	236
70	50 × 137	60	240	70	50 × 137	60	238
75	50 × 137	60	238	75	55 × 137	60	307
80	55 × 137	60	290	80	55 × 137	60	302

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