Differences between resistance and resistivity

Understanding the differences between resistance and resistivity is very important as they are closely related. This article aims to bring you clarity on resistance and resistivity by comparing each of their properties, definitions and formula. Introduction Every object posses some amount of opposition to the flow of electric current. If the object is a conductor, … Read more

Difference between current transformers and Potential transformers

Current transformers (CT) and Potential Transformers (PT) are instrument transformer types used to step down transmission or distribution line voltages and current to the level that can be measured using measurement devices or controlled using control devices. The principle of operation of a certain type of CT and PT is similar to power transformers. Here … Read more

Top 5 differences between MCB and RCCB

RCCB stands for Residual current circuit breakers and MCB stands for Miniature circuit breakers. Both of them are basic circuit protection devices found in the distribution boards of every house and commercial lighting power distribution boards. Here are the differences between MCB and RCCB. RCCB – Residual Current Circuit Breakers Residual current circuit breakers are … Read more

Difference between PLC and DCS

In the world of industrial automation, Programmable logic controllers (PLC) and Distributed Control Systems (DCS) are used to control or automate a process or a machine. They monitor the field signals and operator inputs and make decisions based on how they are programmed. Here you can understand the difference between PLC and DCS. What is … Read more

Difference between NPN and PNP transistors | NPN vs PNP Transistor

The bipolar junction transistors exist as NPN and PNP types. This article intents to help you understand the difference between these two types and how to use them in a circuit. Also, this will be helpful to automation engineers and instrumentation engineers in understanding 3 wire sensor connections. Transistors are made by combining two types … Read more

Comparison of core type and shell type transformers

A magnetic core and windings are two basic parts of a transformer. The windings are wound over the core and the core encircles the windings. Based on the way the core and the winding are made, transformers are classified into two types: Core type and shell type transformers. Both of them refers to the arrangement … Read more

Top 5 differences between kW and kVA

kW and kVA are units of power. kW stands for kilo-watts and kVA stands for kilo-volts ampere. Let’s see what is the difference between kW and kVA and how to calculate each one of them. The key differences between kW and kVA kW – Kilowatts kVA – Kilo-volt amperes It is the unit of electric … Read more

Top 5 differences between fuses and circuit breakers

Short circuits and overloads are abnormal conditions that cause heavy current flow in a circuit. Heavy currents are capable of damaging a device or a circuit and may end up with electrical hazards. Fuses and circuit breakers are protection devices that ensure the safety of the equipment or circuit in which they are used. This … Read more

Difference between fuse and MCB

Circuit protection devices such as fuses and MCBs are used to safeguard any equipment from damages caused due to short circuits. The usage of these devices does not mitigate the chances of occurrence of a fault. But can help us prevent the undesirable aftermaths of the electrical faults. This article is about the difference between … Read more

Difference between utilization categories AC-1 and AC-3

The utilization categories AC-1 and AC-3 defines making, breaking and continuous operation current rating for contactors. Based on these rating, contactor for switching of resistive loads and switching of squirrel cage induction motor are selected. The above picture shows a contactor manufactured by ABB with its operational current rating labelled on it. It can be … Read more