Entes MPR-45 - Connection Test Procedure

13
Connection Test
After finishing device connections, you can check the connection that you’ve done by using the automatic
test function.
When you press the BACK button for 3 seconds, it switches to test mode. During this mode, at least 20%
of the nominal voltage must be applied to the voltage measuring inputs, at least 10% of the nominal
current must be applied to the current measuring inputs and the angle difference between current and
voltage inputs must be less than 30 degrees. These test conditions must be met.
During connection test, the device controls the connections and it can correct them internally or it can
leave the physical correction to the user.
If there’s an error between voltage inputs, it can only be corrected by changing physical connections.
If you encounter Error 12, make sure that all connections are done and minimum current/voltage values
are applied to the device.
On the following table, possible connection errors that may be encountered during connection test and
their corresponding error codes that are displayed on the device screen.
Test Error Code
Test Code Description
0
All connections are correct
1
Phase-1 current direction is reversed
2
Phase-2 current direction is reversed
3
Phase-3 current direction is reversed
4
Phase-1 and Phase-2 voltage connections are reversed
5
Phase-1 and Phase-3 voltage connections are reversed
6
Phase-2 and Phase-3 voltage connections are reversed
7
Voltage connection phase sequence will be changed as L1,L2,L3 - L3,L1,L2.
8
Voltage connection phase sequence will be changed as L3,L2,L1 - L3,L1,L2.
9
CT-1, CT-2 will be swapped.
10
CT-1, CT-3 will be swapped.
11
CT-2, CT-3 will be swapped.
12
Test conditions are not met.
Line Termination Resistor
Line termination resistors are used when communication line length is longer than 10 metres. Please
short terminals GND and TR to enhance communication performance in case of multiple devices on the
same network.