MCB Trip Curves – B, C, D, K, and Z trip curves
MCB (Miniature circuit breaker) is a re-settable device designed to protect a circuit from short circuits and overcurrents. The trip curve of an MCB (B, C, D, K, and Z…
Difference between MCB and RCBO
MCB – Miniature Circuit Breaker and RCBO – Residual Current Circuit Breaker with Overload Protection are circuit protection devices. These devices are commonly used in low-voltage power distribution and can…
What is meant by stalling of motor?
Motor stalling is a condition in which a motor stops rotating even when there is sufficient voltage at its terminals. This condition occurs when the torque required by the load…
Difference between MPCB and MCCB
Motor Protection Circuit Breakers and Moulded Case Circuit Breakers and are devices used to open and close a circuit manually and interrupt the circuit automatically on the occurrence of faults.…
Difference between RCCB and RCBO
RCCBs and RCBO are residual current protection devices. Residual current protection is achieved by monitoring the flow of current in the line and neutral. In a healthy circuit, the current…
What will happen if a DC voltage is applied to a transformer coil?
This is a quite common question asked by many. In fact, it is necessary to know why we don't apply DC voltage to a transformer coil. You may come across…
Difference between MCCB and RCCB
Difference between MCCB and RCCB MCCBs and RCCBs are circuit protection devices with two different application. When the former protect against overload and short circuit, the later protects against Residual…
Difference between contactor and relay
Contactors and relays are electrically operated switches used for the control and switching of loads. The difference between them primarily lies in the load current that they can handle, where…
What is Comb Busbar?
Single pole comb busbar Comb busbar is one of the most basic switch gear instruments. The main purpose of a comb busbar is to distribute power to switch gear components such…
What is ammeter selector switch?
Ammeter selector switch is basically a normal three position switch. In large Electrical distribution panels, an ammeter is used to monitor the current through each line. (more…)