3 views
by
With neat diagram explain constructional details of dynamometer type wattmeter.

1 Answer

0 votes
by

image

➢ Constructional details of dynamometer type wattmeter:- 

• Fixed Coils [F1 & F2]. : fixed coil is divided into two sections to give a uniform field near the center [F1 & F2]. The operating field is produced by the fixed coil 

• Moving coil [M]:-The moving system consists of a coil mounted on the spindle which is free to rotate in the space between the two fixed coils. The coil is made up of thin copper wire and is air cored to avoid hysteresis. 

• Control torque provided by two spiral springs. They also act as connecting leads for the moving coil. Pointer is mounted on the spindle. 

• Mirror is provided to avoid parallax error. 

• Damping is provided by air friction damping 

Welcome to Electrical Engineering Questions and Answers site. You are free to ask any questions and answer any questions...

Categories

Most popular tags

power motor dc circuit voltage transformer current used system phase resistance factor load synchronous energy ac induction generator electric series frequency capacitor use speed between electrical meter line type mosfet control transmission difference magnetic plant high single instrument bjt source advantages function diode machine unit winding torque field parallel amplifier define supply thyristor motors arduino shunt maximum relay armature problem electricity time and value on transformers types coil diagram state flow ratio material three starting direction theorem method emf formula operating efficiency digital wave microprocessor test instruments loss measure operation connected low applications effect single-phase working losses different network law wattmeter inductance temperature measuring constant signal controlled breaker device full compare flux drive wire resistivity logic rc materials machines angle force switch disadvantages converter transistor gain protection scr core measurement number free bridge principle generators reactance circuits negative friction open pole conductor conservation steam iron loop resistors hysteresis short computer using lines secondary station battery rectifier inverter linear induced relays nuclear regulation design analog work rotor electronics gate forces diesel damping rlc connection factors capacitance capacitors minimum insulation basic moving running self systems air fault range direct main stability quality starter igbt eddy ideal ammeter rl 3-phase plants arc thermal error fuzzy biasing dielectric pressure balanced superposition errors rotation characteristics feedback impedance measured electronic inductive start alternator off back curve over solar average three-phase tariff locomotive peak bias zener commutator surge rating universal potentiometer density permanent mechanical copper transducer capacity electrons memory adc excitation transfer explain fuse pure harmonics application of inductor internal pmmc reaction welding resonance traction permeability breakers rms designed electromagnetic engineering si generation brushes switching capacitive shaded rate distribution methods delta star oscillator reluctance semiconductor simplification algebra 8085 boolean weston dynamometer insulating strength installation definition fuel heating earth units neutral rated conductors coefficient filter controller usually reverse
...