COMMON ELECTRICAL SIGNS
Category Archives: Electrical
COMMON ELECTRICAL SYMBOLS
IP – INGRESS PROTECTION
IP- Ingress protection classifies and rates the degree of protection provided against intrusion, dust, accidental contact, and water by mechanical casings and electrical enclosures. It followed by two or three digits. 1st Number 0 No special protection. … Read More »
Common Equivalents and Conversion
Different types of UPS connection
Procedure for AC motor checking
Here we discuss procedure for AC motor checking Check body of motor, is there any physical damage of not ? check mouting and alignment check bearing of motor , is it moving freely or not ? Push and pull down shaft of motor and check movement of shaft Check resistance of each lead (R,Y,B) with… Read More »
How to speed control of AC Motor ?
AC induction motors are based on the principle of a rotating magnetic field produced by a set of stationary windings (called stator windings) energized by AC power of different phases. The effect is not unlike a series of blinking light bulbs which appear to “move” in one direction due to intentional sequencing of the blinking. If sets of… Read More »
How to speed control of DC motor ?
DC electric motors generate torque by a reaction between two magnetic fields: one field established by stationary “field” windings (coils), and the other by windings in the rotating armature. Some DC motors lack field windings, substituting large permanent magnets in their place so that the stationary magnetic field is constant for all operating conditions. In any case, the… Read More »
Typical circuit diagram for Auto Transformer starter
Typical circuit diagram of Star Delta starter
