This calculator can be used to calculate Tripping time of numerical as well as electro-mechanical relay at your installation within fraction of seconds.
This app also tells the RESET TIME of electro-mechanical induction disc type relays.
Trip Time co-ordination functionality is added newly for relay co-ordination purpose.

Supported Standards are IEC and US.

Supported Curves are -
1. Standard Inverse
2. Inverse
3. Very Inverse
4. Extremely Inverse
5. Long Time Inverse
6. Short Time Inverse

Transformer parameters calculations based on nameplate details are also available.
Following parameters are calculated -
1. Primary and Secondary Full load current
2. Transformation Ratio
3. Primary and Secondary Short circuit Current (Approximate)
4. Primary Voltage required for full load secondary current on short circuit based on %Z