Dingfeng Capacitor -- When to Replace run capacitor

Time: 2019-07-06
Summary: As a general rule of thumb, a run capacitor will far outlast the same motor's start capacitor. A run cap will also fail or wear differently than a start cap, making troubleshooting slightly more involved. ...

As a general rule of thumb, a run capacitor will far outlast the same motor's start capacitor. A run cap will also fail or wear differently than a start cap, making troubleshooting slightly more involved.

 

When a run capacitor begins to perform outside the allowable range, it is most often indicated by a dropping of the rated capacitance value (the microfarad value has gone down). For most standard motors, a run capacitor will have a "tolerance" specified describing how close to the rated capacitance value that the actual value may be. This will be usually +/- 5 to 10%. For most motors, as long as the actual value is is within the 10% mark of the rated value, you're in good shape. If it drops outside of this range, you'll need to replace it.

 

In some cases, due to a defect in a capacitor's construction or sometimes caused by a non-capacitor related motor issue, a run capacitor will bulge from internal pressure. For most modern run capacitor designs, this will open the circuit, disconnecting the internal spiral membrane as a protective measure to prevent the capacitor from popping open.

 

If its bulging, time to replace. If you measure no continuity across the terminals, it is also time to replace.

 

Capacitor manufacturers look forward to your consultation

http://www.dfcapacitor.com/

E-mail/Skype: info@dfcapacitor.com

Tel/WhatsApp: +86 15057271708

Wechat: 13857647932

Skype: Mojinxin124

 

Previous:Dingfeng Capacitor -- What are the reasons for running capacitor failure?

Next:Dingfeng Capacitor -- How do you know if start capacitor is bad?