Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of the following systems is NOT a part of the operating mechanism in a single- phase energy meter?
Braking system
Energy system
Driving system
Registering system
Energy system
An induction-type single-phase energy meter consists of four main functional systems: driving, moving, braking, and registering. 'Energy system' is not a designated component or functional block in the standard architecture of an induction watt-hour meter.
IS 13779:1999
An induction-type single-phase energy meter consists of four main functional systems: driving, moving, braking, and registering. 'Energy system' is not a designated component or functional block in the standard architecture of an induction watt-hour meter.
TdтАЛтИЭ╬жpтАЛ╬жsтАЛsin(╬Ф)
TbтАЛ=kтЛЕNтЛЕ╬ж2
The driving system uses shunt and series magnets to produce a rotating magnetic field. This field induces eddy currents in the aluminum disc, creating a driving torque TdтАЛ. The braking system, typically a permanent magnet, provides a counter-torque TbтАЛ to ensure the disc speed is proportional to power. The moving system supports the rotating disc, and the registering system records the number of revolutions on a gear-driven dial.
Driving system: Produces torque using series and shunt electromagnets.
Moving system: Comprises the disc, spindle, and bearings.
Braking system: Uses a permanent magnet to provide damping torque proportional to speed.
Registering system: Displays the cumulative energy consumption (kWh).
High accuracy over a wide range of loads
Reliable mechanical construction
Subject to mechanical wear and friction
Affected by variations in temperature and frequency
Residential electricity billing
Small-scale industrial load monitoring
The driving system uses the shunt magnet (voltage coil) and series magnet (current coil).
The registering system typically utilizes a train of gears connected to the spindle.
The braking magnet's position is adjusted to calibrate the meter speed.
B is correct тАФ Energy system is not a defined component of an induction energy meter.
Remember the mnemonic 'DBMR' (Driving, Braking, Moving, Registering) for energy meter components to avoid confusion with internal power circuits.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants