Over Load Current Calculator
Enter the values of full load current, FLC(A) and rated service, RS to determine the value of Overload current, OLC(A).
Over Load Current Formula:
Overload current is an important concept in electrical engineering, particularly for protecting electrical circuits and devices from damage due to excessive current flow.
It describes the amount of current that exceeds the normal full load current (FLC) that a device or circuit can safely handle.
Overload current calculations are crucial for determining the appropriate ratings of protective devices such as circuit breakers and fuses to ensure safety and prevent overheating or failure of electrical components.
Overload current, OLC(A) in amperes is calculated by dividing the full load current, FLC(A) in amperes and rated service, RS in percentage by 100.
Overload current, OLC(A) = FLC(A) * RS / 100
OLC(A) = overload current in amperes, A.
FLC(A) = full load current in amperes, A.
RS = rated service in percentage.
Over Load Current Calculation:
- Calculate the overload current for a motor with a full load current of 10 amperes and a rated service of 125%:
Given: FLC(A) = 10A, RS = 125%.
Overload current, OLC(A) = FLC(A) * RS /100
OLC(A) = 10 * 125 / 100
OLC(A) = 10 * 1.25
OLC(A) = 12.5A.
- Determine the rated service for a transformer with a full load current of 20 amperes and overload current is 30A.
Given: FLC(A) = 20A, OLC(A) = 30.
Overload current, OLC(A) = FLC(A) * RS /100
RS = OLC(A) * 100 / FLC(A)
RS = 30 * 100 / 20
RS = 3000 / 20
RS = 150.
Applications and Considerations:
- Electrical Protection: Overload current calculations help in selecting the correct size and rating for protective devices like circuit breakers and fuses.
- Motor Protection: Ensuring motors are protected from excessive current to prevent overheating and damage.
- Transformer Safety: Protecting transformers from overload conditions to maintain reliability and longevity.