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The WET METAL CASE A.C. MOTOR RUN CAPACITORS are manufactured with a dielectric material that consists of two sheets of polypropylene film. Each one with a thin layer of vacuum deposited metal on one side. Metals are selected according to final application aluminum/zinc and zinc. Both films are acting as electrodes in the capacitor; because this metal is just a few hundred amstrongs thick, it has a very limited current carrying capability at any single point in the dielectric. To compensate this limitation, the entire edge of each electrode is bonded by a metallized endspray that has a relatitively high current carrying capability. The endspray serves as the termination point for the internal connections of the capacitor, this construction minimizes the current at any single point of the electrode. This current capability is enhanced by soldered or welded end terminations.
These capacitors are self-healing, a property of the metallized film to restore itself to an operating condition when a dielectric breakdown occurs during operation.
The thin metal layer around the fault point will act like a low current carrying fuse. Under a fault condition the current will evaporate the metal around the fault point and clear the fault. This is accomplisshed by special frame work of the film with a specific ohmic resistivity and low melting point temperature the evaporation of the electrode will result in a capacitance loss that is virtually unmeasurable. All films for capacitors have particularly low dielectric losses, high level of insulation and dielectric strength.
These capacitors are provided with an internal protective device to prevent case rupture under capacitor fault conditions at specified levels of voltage and fault current. The internal protector is a pressure sensitive interrupter and the dielectric medium is made of vegetable oil. The kind of enclosure can be oval or round.
Maximum Fault current 10,000 [A]
Internally Protected (Interruptor pressure)
Meets all EIA standards and UL810
Integral mounting options available for easy installation
60,000 hours of operational life
Self-clearing metallize polypropylene film
Fully automated assembly for consistent results
Light weight and cost effective
100% end of line tested
100% serialized and 100% end of line data capture
> 96% reliability at 60,000 hours of equivalent run time
UL810 UL File E229850 ( series 29 )
UL810 UL File E13806 (series 325 and 328)
CSA File 89486 (series 325 and 328)
VDE Licences No 134246, 135494 and 135492 (series 325)
The WET METAL CASE A.C. MOTOR RUN CAPACITORS are designed to be used in various types of applications like electric motors and HID ballasts. They are used as part of the current limiting circuit for power factor correction, refrigeration equipment, etc. The A.C. capacitors provide direction by shifting the current in the windings so that the motor simulates the operation of a two-phase motor. These motor run capacitors are designed specifically to be used with permanent split-phase capacitor motors in swimming pool, whirlpool and spa applications where strict form and fit restrictions are required.
These capacitors are designed to meet performance testing outlined in EIA-456 standard and UL810. Test programs are run continuously at NG and at third party laboratories to monitor production and to design improvements. These tests confirm reliable performance of NG capacitors used within rated conditions. Ongoing tests include: accelerated life, over voltage, mechanical, terminal to terminal voltage, and voltage to case voltage tests.
Manufacturer's name or trade name or trademark or file number
The date or other dating period of manufacture
A distinctive catalog number or the equivalent
The capacitance in microfarads
The voltage rating
The frequency in hertz
The temperature rating when the capacitor is rated over 70°C (158F)
The maximum fault current
The capacitor shall be additionally marked Internally Protected or Protected
Recognition Component Marking
Only those components, which actually bear the Marking, should be considered as being covered under the Recognition Program
The UL Listing or Classification Mark is not authorized for use on or in connection with Recognized Components
Electrical Specifications
| Capacitance Range |
From 1 to 99 µF |
| Voltage Range |
250, 370 ,440, 480 and 660 Vac. Other voltages upon request |
|
Capacitor Tolerance: |
6% Standard. Other tolerances upon request |
|
Disipation Factor: |
0.1% at 60 Hz and 25 C, 1% at 1,000 Hz and 25 C |
|
Operating Temperature: |
-40°C +70°C. Other temperatures upon request. |
|
Insulation Resistance |
500 M Ohms per µF. |
|
100% end of line tested: |
Terminal to Terminal = 1.41x[1.75 x VAC (rated)] as a DC voltage
Terminal to Case = 1.41x[2 x VAC (rated) + 1 KVAC] as a DC voltage
Cap at 1 KHz and 25°C ± 5°C
D.F. at 1 KHz and 25° ± 5°C
|
|
end of line data capture: |
Cap at 1 KHz and 25°C ±5°C
D.F. at 1 KHz and 25° ± 5°C
Capacitance end of life is = -3% loss of capacitance |
Mechanical Specifications