Inverse definite minimum time (IDMT) relay is a form of overcurrent relay that operates in inverse time fashion with the current in the protection system. Basically, with the change in the peak value of the current, the time required for the relay to perform is decreased. The measurement of operating time starts immediately when the …
INTRODUCTION Switchgear and protection is one of the most important topic in electrical and power engineering. All the electrical machines are very expensive assets for our electrical grid network, e.g: motor, generator, transformer. So knowledge on switchgear and protection is must. In this post we will look some common questions on switchgear and protection. This …
The objectives of the protection system: – limit damage to people and to the plant; – permit different service conditions; – guarantee maximum service continuity for the plant not affected by faults; – activate the automatisms provided. The characteristics of the protection system: – Dependence: it can be called on to work after either a short …