With neat diagram, explain the working of clip-on ammeter.
2 Answers
Answer :
1. Clip on ammeters are used to measure the high current flowing through bus bar, cable or fuse holders carrying currents.
2. They consist of split core current transformer whose secondary winding is connected to rectifier type moving coil instrument.
3. The primary become conductor, whose current is to be measured. The split core gets aligned by the force of a spring tension.
4. While the core is covered with insulating material. Hence higher current through conductors can be measured.
5. A selector switch is provided to select secondary number of turns which ultimately changes the current range.
6. For measuring current the core is opened by pressing trigger shown and then clipped over the conductor carrying current. The dial will record the current directly.
2. They consist of split core current transformer whose secondary winding is connected to rectifier type moving coil instrument.
3. The primary become conductor, whose current is to be measured. The split core gets aligned by the force of a spring tension.
4. While the core is covered with insulating material. Hence higher current through conductors can be measured.
5. A selector switch is provided to select secondary number of turns which ultimately changes the current range.
6. For measuring current the core is opened by pressing trigger shown and then clipped over the conductor carrying current. The dial will record the current directly.
Answer :
Working of Clip on Ammeter: Clip on ammeters are used to measure the high current flowing through bus bar, cable or fuse holders, which act as primary. It consists of split core current transformer whose secondary winding is connected to rectifier type moving coil instrument. The primary becomes conductor, whose current is to be measured. The split core gets aligned by the force of a spring tension. The core is covered with insulating material. Hence higher current through conductors can be measured by transformer action. A selector switch is provided to select secondary number of turns, which ultimately changes the current range. For measuring current, the core is opened by pressing trigger as shown and then clipped over the current carrying conductor. The dial will record the current directly.