Acuvim II Install Guide

We walk through the installation of the Acuvim II power and energy meter in a number of configurations.


Voltage and Current Connection

The Acuvim II can be installed using some of the common installation methods shown below along with their respective meter configurations. For other installation methods not mentioned here, please consult the Acuvim II Series High Performance Power Meter User Manual.

Three Phase: 4 wire-connection (Three phase with a neutral)

Common Voltages for this connection: 208LL/120LN, 600LL/347LN

With Direct Voltage Connection

Direct voltage connection is used if the system voltage is lower than 400V LN or 690V LL. The connection diagram is shown in Figure 1.

Acuvim II With Direct Voltage Connection - 3LN, 3CT

Figure 1:
Meter Configuration: 3LN, 3CT


With Potential Transformers (PTs)

PTs are required if the system voltage is higher than 400V LN or 690V LL. The connection diagram is the same as the direct voltage connection seen in Figure 1, with the exception of the PT connections for the voltage lines. The PTs should be connected as shown in Figure 2.

Acuvim II With Potential Transformers - 3LN, 3CT

Figure 2:
Meter configuration: 3LN, 3CT

Three Phase:3 wire-connection (Three phase without a neutral)

Common Voltage for this connection: 480V LL

With Direct Voltage Connection

The configuration will be the same as the three phase 4-wire direct voltage connection shown in Figure 1, with the exception of a neutral connection. The direct voltage connection is used if the system voltage is lower than 690V LL.

Acuvim II Direct Voltage Connection 3LL 3CT

Figure 3:
Meter Configuration: 3LL, 3CT


With Potential Transformers (PTs)

PTs are required if the system voltage is higher than 690V LL. Instead of connecting the voltage lines directly to the meter as shown in Figure 3, the voltage lines are connected to the meter using PTs. The PTs should be connected as shown in Figure 4. Two PTs are required for this connection.

Acuvim II with Potential Transformer - 2LL, 3CT

Figure 4:
Meter configuration: 2LL, 3CT

Single Phase: 2 Lines (Single phase with one line and a neutral)

Common Voltage for this connection: 120V

Acuvim II Single Phase 2 Line setup

Figure 5:
Meter Configuration: 1LN, 1CT (Firmware above 3.01); 3LN, 3CT (Firmware below 3.01)

Single Phase: 3 Lines (Single phase with 2 lines and a neutral)

Common Voltages: 240LL/120LN

Acuvim II Single Phase 3 Line setup

Figure 6:
Meter Configuration: 1LL, 2CT (Firmware above 3.01); 3LN, 3CT (Firmware below 3.01)

Power Supply Connection

Caution: Check the silver sticker on the side of the meter to confirm which power supply option the meter supports before energizing it. The silver sticker will list details such as the model number, power supply, voltage/current inputs and serial number.

To power on the meter connect the power supply terminal as shown in Figure 7

Acuvim II Power Supply Connection

Figure 7:
Power Supply Connection


This will be connected based on the two power supply options available:

  • The standard option: 100-415Vac, 50/60Hz or 100-300Vdc
  • The low voltage DC option: 20-60Vdc