IEC 60255 / IEEE C37.112

IDMT Relay Trip Time Calculator

Calculate inverse definite minimum time relay operating times for overcurrent protection coordination — IEC and IEEE curve types.

Calculator

Curve Standard

Curve Type (IEC)

Relay Pickup Current (Is) Amperes (A)

Fault Current (I) Amperes (A)

Time Multiplier Setting (TMS) IEC: 0.05 to 1.0

Plug Setting Multiplier (PSM) Auto-calculated: I / Is

Trip Time

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Formatted: —

Plug Setting Multiplier

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I / Is = —

Selected Curve

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PSM	Current (A)	Trip Time (s)

1. Plug Setting Multiplier (PSM):

PSM = I / Is

2. Trip Time:

3. Result: