Failure Modes
A faulty run capacitor often becomes swollen, with the sides or ends bowed or bulged out further than usual: it can be clear to see that the capacitor has failed because it is swollen or even blown apart with capacitor oil leaking. Some capacitors are built with a "Pressure Sensitive Interrupter" design that causes them to fail before internal pressures can cause serious injury. One design causes the top of the capacitor to expand and break internal wiring.
"Weak Capacitor" - Over many years of use the capacitance of the capacitor (measured in microfarads) reduces. As a result the motor may fail to start or run at full power.
IEC/EN 60252-1 2001 specifies levels of protection for motor run capacitors
- P0 - no protection;
- P1 - fail open circuit or short circuit
- P2 - fail open circuit only
Read more about this topic: Motor Capacitor
Famous quotes containing the words failure and/or modes:
“Girls tend to attribute their failures to factors such as lack of ability, while boys tend to attribute failure to specific factors, including teachers’ attitudes. Moreover, girls avoid situations in which failure is likely, whereas boys approach such situations as a challenge, indicating that failure differentially affects self-esteem.”
—Michael Lewis (late–20th-century)
“Heaven is large, and affords space for all modes of love and fortitude. Why should we be busybodies and superserviceable?”
—Ralph Waldo Emerson (1803–1882)