In Figure 7.16 is shown the construction of three-phase kWh-meter and wiring. KWh-meter three-phase having ten terminals. Torque moving the disk rotational torque is the sum of each phase. Furthermore, the swivel moving mechanical disc recorder, and calibrated to show the total energy used by a network of three-phase systems. For the purposes of determining the energy consumption that has been used by the user, the kWh-meter differentiated tariffs Single and Dual tariff kWh-meter.
kWh-meter Dual rates are used to measure energy (KAH) during peak load time (PLT) and during the time in-Outer Peak Load (OPLT). kWh-meter double tariff has two scale readings are for PLT and OPLT. To set this load time to use a time switch (relay time). For the measurement of energy consumption (kWh) in three-phase systems, can be reached in two ways:
– Using a three-phase kWh-meter 3 wire system
– Using a kWh-meter three-phase 4-wire system
Here is an example of a nameplate on a three-phase kWh meter, double fare, made in Indonesia.
Name plates Figure 7.16 kWh-meter Three phase, 4 wire
Figure 7.17 Wiring kWh-meter Three phase, 4 wire
Figure 7.18 Wiring Three-phase kWh-meter