Various devices connected in series with the current loop current transformer secondary

Measuring circuit is divided into current loop and voltage loop. Various devices connected in series with the current loop current transformer secondary side (5A), current transformer primary side is unified into a 5A load current measuring current. Metering and protection respectively respective transformer (high precision metering transformers),  mcb circuit breaker  and measurement series with the ammeter meter, power meter and power factor meter current terminal. Protection measure current in series with the protection relay terminals.  Electric energy meter  will generally be concentrated in one measurement and protection, respectively, measured at current terminals and protection current terminal.
Voltage measuring circuit, 220/380V low pressure system directly connected to 220V or 380V, 3KV high pressure system above all through the various levels of voltage transformer High  Circuit breaker  unified 100V voltage, voltmeter and power meter, power meter and power factor meter voltage coils are connected to its terminals and 100V voltage bus. Computer protection unit protection voltage measured voltage and unity as a voltage terminals.