71M6xxx Data Sheet

7

Current Shunt

Sensor

Pulse

Transformer

71M654x

71M6xxx

1 kΩ

1 kΩ

1. 0 µF

Load

Voltage

Sensing

8

2

3

4

5

6

7

1

R1

R2

C1

Figure 2: External Components Connected to the 71M6xxx

3.3

Connections to Sensors and to the 71M654x

Figure 3 shows the sensor connections for single-phase meter application using a 71M6541D/F and

71M6x01. This single-phase configuration uses one local shunt and one shunt isolated with a 71M6x01

device. Since the local shunt is connected to the LINE circuit, the meter is also referenced to the LINE

circuit.

Figure 4 shows the sensor connections for a polyphase meter application using a 71M6543F/H or

71M6545/H. This polyphase configuration uses three 71M6xx3 to isolate the shunt sensors for the three

phases, while a locally connected fourth shunt sensor can be optionally used to sense neutral current.

Since the local shunt is connected to the neutral circuit, the meter is also referenced to the neutral circuit.