electricpy.fault.toctriptime¶

electricpy.fault.toctriptime(I, Ipickup, TD, curve='U1', CTR=1)[source]¶

Time OverCurrent Trip Time Function.

Time-OverCurrent Trip Time Calculator, evaluates the time to trip for a specific TOC (51) element given the curve type, current characteristics and time-dial setting.

Parameters:

I (float) – Measured Current in Amps
Ipickup (float) – Fault Current Pickup Setting (in Amps)
TD (float) – Time Dial Setting
curve (string, optional) – Name of specified TOC curve, may be entry from set: {U1,U2,U3,U4,U5,C1,C2,C3,C4,C5}, default=U1
CTR (float, optional) – Current Transformer Ratio, default=1

Returns:

tt – Time-to-Trip for characterized element.

Return type:

float