Fire and Gas System Loop Checks Procedure
Guidelines to be followed by F&G Engineer during Fire and Gas System Loop Checks Procedure. Read this article on Fire Alarm System commissioning.
Zigzag Transformers Theory
The most common connection used in grounding transformers is the Zig-Zag connection. The grounding transformer is commonly referred to by this connection type, the Zigzag Transformer. Grounding Transformers are used…
Synchronous Motor Starting Methods
In the previous article we came to know that synchronous motors are not self starting so to make them start automatically we should add some tweaks.We should rotate rotor near…
Synchronous Motor Is Not Self Starting?
To get a clear idea about this question consider a rotating magnetic field as equivalent to physical rotation of two stator poles N1 and S1 as shown in the figure.Assume…
Synchronous Motor Working Principle
A motor is an electro-mechanical device which converts electrical energy to mechanical energy. and a 3 phase motor runs at synchronous speed is called synchronous motor.Synchronous motor mainly runs on…
Basics of Grounding
Why Ground? Poor grounding not only contributes to unnecessary downtime, but a lack of good grounding is also dangerous and increases the risk of equipment failure. Without an effective grounding…
HART Protocol and Fieldbus Interview Questions
The following are the HART Protocol and Fieldbus Interview Questions listed with answers. HART Protocol and Fieldbus Interview Questions HART Communication Protocol (Highway Addressable Remote Transducer) 1. Define HART. HART is an…
Clamp Meters Working Principle
Clamp Meters using Current Transformer for AC Measurement Current transformer clamp meters are equipped with rigid jaws of made of ferrite iron. The jaws are individually wrapped by coils of…
Introduction to RTDs
Resistance Temperature Detectors (RTDs) rely on the predictable and repeatable phenomena of the electrical resistance of metals changing with temperature. The temperature coefficient for all pure metals is of the…
Difference Between 2 wire RTD, 3 wire RTD, and 4 wire RTD’s
Difference Between 2 wire RTD, 3 wire RTD, and 4 wire RTD's RTDs (Resistance Temperature Detectors) are offered with 2, 3, or 4 lead configuration. The best configuration for a…
