Protection and switchgears

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 flow through the line will be equal to the return flow in the neutral. In the case of any abnormalities, this return flow may not … Read more

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 currents and electric shock. MCCB- Molded Case Circuit Breakers Moulded Case Circuit Breakers protect against overcurrent and short-circuits only unless otherwise, they have inbuilt residual protection. MCCBs trip as … Read more

Difference between MCB and MCCB

MCBs and MCCBs have commonly used circuit protection devices. These devices provide protection against overcurrent and short circuits. In this article, let us discuss the difference between MCB and MCCB. Overview of MCB: These are thermal / thermo-magnetic devices Provides protection against overcurrents and short circuits. Available up to 100A and have a maximum short … Read more

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 they are used, and how they are used in a circuit. This article can give you a clear picture of the difference between contactor and … Read more

What is ammeter selector switch?

Untitled- ELECTRICAL CLASSROOM

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.

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Why are current transformers used in power system?

Why are current transformers used in power system? Protective relays coils and measuring instruments such as an ammeter, watt meter and energy meter are very sensitive devices and cannot be directly connected to the line carrying high magnitudes of current. So, we have to reduce the magnitude to a lower value and equivalent to the … Read more