overcurrent can result from overload, short
circuit, ground fault.25
Ohm’s Law law that states that the current circuit directly
proportional the voltage and inversely proportional the
resistance.
Overload Relay device used protect motor from damage resulting from
an overload. Short circuits and ground faults are not overloads.
Overload Can refer operating condition excess the full-load
rating current high enough cause damage present
long enough.
Set Point
(Desired Value)
Control Device Process
Controller
Overcurrent current excess the rated current for device or
conductor.
Open-Loop Control control technique that does not use feedback signal.
I =
E
R
E Electromotive Force (Voltage) Volts
R Resistance Ohms
I Current Amperes (Amps)
Open Drip Proof (ODP) motor enclosure type that permits air flow through the motor,
but designed prevent liquids solids falling from above
at angles degrees from the vertical from entering the
motor.
2,4
1,8
2,5
STOP button
Manual/Automatic Reset
Selector Switch
Position Switch Indicator
and Test Function
Current Setting Dial
Automatic/Manu
Reset Selection
+/- 15% Full-
Amps Adjustme
Test Button
Reset Button
Solid State Overload Relay Ambient Compensated
Bimetal Overload Relay
