33 Wiring Instructions; 331 Wiring Diagram - ADTEK AEM-DRB Operation Manual

3.3 Wiring Instructions
3.3.1 Wiring Diagram
• Note
1. To avoid electric shock, do not change the wiring while the power is on.
2. Since the power meter does not have a power switch, be sure to install a circuit
breaker switch on the power cord of the meter.
3. Measuring Voltage: When the measuring voltage is higher than the rated specification
range that this equipment can carry, must use an external voltage transformer (PT).
4. Measuring current: Measuring the current requires the use of an external current
transformer (CT).
The recommended wiring material is as follows:
Terminal Block
Branch loop current, RS-485 AWG 28 ~ 14 2.04 kgf.cm (0.2 N·m)
A u x . p o w e r , M e a s u r e d
voltage, RO, DI, PO,
Main loop current
•  Wiring method
Single-phase two-wire, 1CT
Wire gauge
AWG 28 ~ 12 5.202 kgf.cm (0.5 N·m) 70℃ or higher
Main loop CT secondary is 5A signal
12
Screw torque
Single-phase three-wire, 2CT
Wire temperature
resistance
70℃ or higher