Construction and Working of Energy Meter
There are four main parts of the operating mechanism:
- Driving system.
- Moving system.
- Braking system.
- Registering system.
Energy meter
Driving system
- The driving system of the meter consists of two electromagnets. The core of these electromagnets is made up of silicon steel laminations. The coil of one of the electromagnets is excited by the load current. This coil is called the current coil. The coil of the second electromagnet is connected across the supply and therefore, carries a current proportional to the supply voltage. This coil is called the pressure coil. Consequently, the two electromagnets are known as series and shunt magnets respectively.
- Copper shading bands are provided on the central limb. The position of these bands is adjustable. The function of these bands is to bring the flux produced by the shunt magnet exactly in quadrature with the applied voltage.
Moving system
- This consists of an aluminum disc mounted on a light alloy shaft. This disc is positioned in the air gap between series and shunt magnets. The upper bearing of the rotor (moving system) is a steel pin located in a hole in the bearing cap fixed to the top of the shaft. The rotor runs on a hardened steel pivot, screwed to the foot of the shaft. The pivot is supported by a jewel bearing. A pinion engages the shaft with the counting or registering mechanism.
- A unique design for the suspension of the disc is used in the floating-shaft energy meter. Here the rotating shaft has a small magnet at each end, where the upper magnet of the shaft is attracted to a magnet in the upper bearing and the lower magnet of the shaft is to a magnet in the lower bearing. The c-moving system thus floats without touching either h-bearing surface, and the only contact with the movement is that of the gear connecting the shaft with the o gear of the train, thus the friction is drastically reduced.
Braking system
- A permanent magnet positioned near the edge of the aluminum disc forms the braking system. The aluminum disc moves in the field of this magnet and thus provides a braking torque. The position of the permanent magnet is adjustable, and therefore, braking torque can be adjusted by shifting the permanent magnet to different radial positions.
Registering (counting) mechanism
- The function of a registering or counting mechanism is to record continuously a number that is proportional to the revolutions made by the moving system. By a suitable system, a train of reduction gears the pinion on the rotor shaft drives a series of five or six-pointers. The energy used by the loads in a kilowatt-hour is directly correlated with their rotation.
Clock Meter
Energy Meter
Energy meters play a crucial role in measuring and monitoring electrical energy consumption, enabling fair billing, promoting energy efficiency, and supporting the management of power distribution networks. These meters come in different forms, including analog, digital, smart meters, and advanced metering infrastructure (AMI). There are various types of energy meters, which have several functions. It is used for household or domestic purposes for measuring electricity bills. In this article, we will go through what is energy meter?, construction with its operations, Then we will go through its types and finally, we will conclude our article with its Advantages, Disadvantages, and characteristics.
Table of Content
- Energy Meter
- Construction and Working
- Operation
- Types
- Advantages and Disadvantages
- Characteristics