Chapter 5 Measurement performance
5.1 Voltage
For EGO700 voltage measurement, the maximum direct-connected phase
voltage is 400V, and line voltage is 500V. The user should pay attention to this when
designing to prevent saturation of the internal measurement loop, resulting in
inaccurate measurement and even damage to the meter. Higher voltage needs to be
connected through PT. The meter can set PT ratio, and the maximum measurable
phase voltage on the primary side is 650kV. The voltage connection mode can be set
through the panel or communication, and supports star and delta modes.
5.2 Current
EGO700 must use CT to measure current. The secondary rated output of CT
needs to meet the rated current input requirement of EGO700 (5A). When wiring the
external CT, prevent the CT output from being open, otherwise a higher voltage will
be generated in the secondary under the action of the primary excitation, causing
personal injury or death or equipment damage.
The direct access current of EGO700 current measurement channel is 0~6.5A,
and the theoretical maximum measurement current of CT primary side is 500000A.
The user should pay attention to this point when designing to prevent saturation of the