Friedrich H)A09K25 Manual De Usuario

23

From the supply line on a typical 230 volt circuit, a 115 volt 
potential exists from the "R" terminal to ground through a 
possible short in the capacitor. However, from the "S" or 
start terminal, a much higher potential, possibly as high as 
400 volts, exists because of the counter EMF generated 
in the start winding. Therefore, the possibility of capacitor 
failure is much greater when the identifi ed terminal is con-
nected to the “S" or start terminal. The identifi ed terminal 
should always be connected to the supply line, or "R" 
terminal, never to the "S" terminal.

When connected properly, a shorted or grounded run-
ning-capacitor will result in a direct short to ground from 
the "R" terminal and will blow the line fuse. The motor 
protector will protect the main winding from excessive 
tem perature.

Many motor capacitors are internally fused. Shorting the 
terminals will blow the fuse, ruin ing the capacitor. A 20,000 
ohm 2 watt resistor can be used to discharge capacitors 
safely. Remove wires from capacitor and place resistor 
across terminals. When checking a dual capacitor with 
a capacitor analyzer or ohmmeter, both sides must be 
tested.

The capacitor analyzer will show whether the capacitor is 
"open" or "shorted." It will tell whether the capacitor is within 
its microfarads rating and it will show whether the capacitor 
is operating at the proper power-factor percentage. The 
instrument will automatically discharge the capacitor when 

the test switch is released

The starting winding of a motor can be damaged by a 
shorted and grounded running capacitor. This damage 
usually can be avoided by proper connection of the running 
capacitor terminals.

WARNING