Hard start kit for multiple replacement applications
View Patent ↗A hard start capacitor replacement unit has a plurality of capacitors in a container sized to fit in existing hard start capacitor space. The capacitors are 4 metallized film capacitors wound in a single cylindrical capacitive element. The container has a common terminal and capacitors value terminals for the plurality of capacitors, which may be connected singly or in combination to provide a selected capacitance. An electronic or other relay connects the selected capacitance in parallel with a motor run capacitor. The hard start capacitor replacement unit is thereby adapted to replace a wide variety of hard start capacitors.
1. A hard start capacitor replacement unit adaptable to a plurality of motors of the type having a run capacitor and each requiring different hard start capacitance values, comprising:
A) a capacitor container having a cover;
B) a plurality of capacitors received within the container, each of said capacitors having a capacitance value;
C) a common terminal mounted on the cover and electrically connected to a common terminal of each of said plurality of capacitors;
D) a plurality of capacitance value terminals mounted on the cover spaced apart from the common terminal and from each other, each capacitance value terminal respectively connected to a capacitor of corresponding capacitance value received in the container;
E) a relay having contacts and means for opening and closing said contacts in response to a monitored condition of motor;
F) wire means for connecting one of said contacts to one of the start, run or common terminals of the motor; and
G) wire means for connecting one or more capacitors between the other contact and the other of the start and run terminal of the motor, said wire means adapted for connection to selected terminals on the cover of the cylindrical capacitance container,
wherein the relay closes the contacts to connect the selected capacitors across the run capacitor of the motor for starting it, and the relay disconnects the selected capacitors after the motor is started.
2. A hard start capacitor replacement unit as defined in claim 1 wherein the capacitors are wound as individual sections of a capacitive element.
3. A hard start capacitor replacement unit as defined in claim 2 wherein the capacitors are metalized film capacitors.
4. A hard start capacitor replacement unit as defined in claim 3 wherein the metalized film is polypropylene metalized with zinc.
5. A hard start capacitor replacement unit as defined in claim 4 wherein the film is about 4 microns or less in thickness.
6. A hard start capacitor replacement unit as defined in claim 1 wherein there are four capacitors.
7. A hard start capacitor replacement unit as defined in claim 6 wherein the capacitors are wound as individual sections of a capacitive element.
8. A hard start capacitor replacement unit as defined in claim 7 wherein the capacitors are metalized film capacitors.
9. A hard start capacitor replacement unit as defined in claim 8 wherein the four capacitors have values of about 48 microfarads, about 48 microfarads, about 88 microfarads and about 112 microfarads, respectively.
10. A hard start capacitor replacement unit as defined in claim 6 wherein the cover mounts four capacitance value terminals and a common capacitor terminal.
11. A hard start capacitor replacement unit as defined in claim 10 wherein the common terminal is centered on the capacitor cover.
12. A hard start capacitor replacement unit as defined in claim 11 further comprising an insulation barrier separating the cover terminals.
13. A hard start capacitor replacement unit as defined in claim 1 wherein the relay is an electronic relay.
14. A hard start capacitor replacement unit as defined in claim 13 wherein the electronic relay is sized to fit above the capacitor container, within the projected cylindrical envelope thereof.
15. A hard start capacitor replacement unit as defined in claim 14 and further comprising a cylindrical cap removably received on the capacitor container said sleeve surrounding the relay and cover terminals when received on the capacitor container.
16. A hard start capacitor replacement unit as defined in claim 15 and further comprising a cylindrical cap removably received on the capacitor container said sleeve surrounding the relay and cover terminals when received on the capacitor container.
17. A hard start cap capacitor replacement unit as defined in claim 1 where the relay is a control or potential relay.