Electrical Instruments

Synchroscope instrument is used for synchronization process. i.e. Connecting 3 phase alternator for parallel operation. Necessity of Synchroscope In power system, the 3 phase alternators, transformers are connected in parallel with system. When 3 phase alternator are connected to the line or system, the correct instant of connecting it to the system is important. That

Ohmmeter is used to directly measure resistance of a device, element, circuit or any portion thereof. This meter is used to determine approximate (not too accurate) resistance of the circuit components. It can be used to measure the resistance of heating element of heater, electric iron, field coil resistance, sorting resistors used in electronics circuits. It can also

Construction of Weston Type Frequency Meter The construction and connection diagram of the Weston type frequency meter is shown in the Figure 1. It consists of two coils, coil-1 and coil-2 (each divided into two parts) which are placed perpendicular to each other. Figure (1): Weston Type Frequency Meter.

The number of cycle per second of the alternating quantity is known as the frequency. The instruments used to measure frequency called Frequency Meter.

In Moving Iron instruments (or MI Instruments), an iron piece moves, when repelled (or attracted) by the magnetic field of a coil. With the moving piece, a pointer is attached which shows deflection on a calibrated scale. These instruments are simple, cheap and reasonably accurate and can be used for ac/dc measurements hence find extensive