Skip to main content

Featured Post

Induction Motor Interview Questions with Answers | Part-1

4 comments

Advantages and Disadvantages of Electromagnetic Relay

Advantages and Disadvantages of Electromagnetic Relay


There are many Advantages, Disadvantages and Application of Electromagnetic Relay which will be mentioned in this article


Advantages, Disadvantages and Application of Electromagnetic Relay
Advantages and Disadvantages of Electromagnetic Relay


Advantages Of Electromagnetic Relay



✓ Electromagnetic relays have fast operation and fast reset.


✓ They can be used for both a.c.and d.c.systems for protection of a.c.and d.c.
equipments.


✓ Electromagnetic relays operating speeds which has the ability to operate in milliseconds
are also can be possible.


✓ They have the properties such as simple, robust, compact and most reliable.


✓ These relays are almost instantaneous. Though instantaneous the operating time of the relay varies with the current. With extra arrangements like dashpot, copper rings etc.


✓ slow operating times and reset can be possible.


Disadvantages Of Electromagnetic Relay



✓ High burden level instrument transformers are required such that CTs and PTs of high burden is required for operating the electromagnetic relays compared to static relays.


✓ The directional feature is absent in electromagnetic relays.


✓ Requires periodic maintenance and testing unlike static relays.


✓ Relay operation can be affected due to ageing of the components and dust,pollution
resulting in spurious trips.


✓ Operation speed for an electromagnetic relays is limited by the mechanical inertia
component.



Applications Of Electromagnetic Relay:



✓ Electromagnetic relays are employed for the protection of various a.c.and d.c.
equipments.


✓ The over or under current and voltage protection of various a.c.and d.c.equipments.


✓ For differential protection.


✓ Used as auxiliary relays in the contact systems of protective relays schemes.


Related Articles Mentioned below

Labels:

Comments

Post a Comment

Popular posts from this blog

Introduction to Arduino | Pin Function of Arduino | Working Process of Arduino

Introduction to Arduino | Pin Function of Arduino | Working Process of Arduino Introduction to Arduino | Pin Function of Arduino | Working Process of Arduino Introduction To Arduino Arduino is an Italian company that designs and manufactures Open Source Hardware (Microcontroller) and Open Source software or IDE (Integrated Development Environment). Arduino hardware is such a programmable computerized platform, by working on which the user can combine the hardware and software and prepare the electronic brain according to his own and can control the electronic devices from that electronic brain. What is arduino? If you want to understand more easily, then we can say that Arduino microcontroller is an empty brain, in which you can upload memory by coding or programming through arduino software, so these are called open source. Arduino works like a CPU of a board computer. Right now the microcontroller of the arduino of this time that we can take up is lik
Post a Comment
Read more

Variable Inductance Transducer | Classification Of Variable Inductance Transducer

Variable Inductance Transducer | Classification Of Variable Inductance Transducer Variable Inductance Transducer | Classification Of Variable Inductance Transducer These are based on a change in the magnetic characteristic of an electrical circuit in response to a measurand which may be displacement, velocity, acceleration etc. Variable inductive transducer may be classified as follows: 1.Self-generating type In this type voltage is generated because of the relative motion between a conductor and a magnetic field. These may be further classified as follows: (A)Electromagnetic type (B)Electrodynamic type (C)Eddy current type 2.Passive type In this type the motion of an object results in change in the inductance of the coils of the transducer. These may be further classified as follows: (A)Variable reluctance (B)Mutual inductance (C)Differential transfer type 1.Self-generating Type (A)Eleotromagnetic t
1 comment
Read more

Induction Motor Interview Questions with Answers | Part-1

Induction Motor Interview Questions with Answers | Part-1 Induction Motor Interview Questions with Answers | Part-1 Q.1 The frame of an induction motor is made of (A) aluminium (B) silicon steel (C) closed grained cast iron (D) stainless steel (E) bronze Answer:  (C) closed grained cast iron Q.2 The stator frame is an induction motor is used to (A) hold the armature stampings in position (B) ventilate the armature (C) protect the whole machine (D) provide return path for flux Answer:  (A) hold the armature stampings in position Q.3 The stator core of a 3 phase induction motor is laminate in order to reduce the (A) eddy current loss (B) hysteresis loss (C) both hysteresis and eddy current loss (D) weight of the stator (E) windage and friction losses Answer: (A) eddy current loss Q.4 An induction motor works with (A) dc only (B) ac only (C) ac and dc both (D) none of these Answer:  (B) ac only Q.5 Which of the following statement associated with polyphase induction motor is/are correct?
4 comments
Read more