page 15/15 KKEW9LC05-A/0-20160901
Wire Connection
A+
SCOM
B-
DO2
DO1
3
4
Note: 1. For voltage input connection terminal,bracket terminals (Ua) (Uc) (Ub) shows 3 phase 3 wire connection method,
2. Current input is current input terminal , all the inputs and outputs must be coherent
Voltage direct input
Voltage input via PT
Voltage input
Voltage input
Current input
Current input via CT
Current input
Model 1: (3pcs CT) 3 phase 4 wire working mode
Model 2: (2pcs CT): 3 phase 3 wire working mode
Voltage direct input
Voltage input via PT
Current input via CT
A
B
C
N
24 25 26
28 29
27
23
21 22
20
23
21 22
20
A
B
C
N
A
B
C
24 25 26
28 29
27
23
21 22
20
23
21 22
20
A
B
C
* *
Explanation :
A. Voltage input: Input voltage should not be higher than the rated input voltage of meter, otherwise a PT should be used.
B. Current input: Standard rated input current is 5A. A CT should be used when the input current is bigger than 5A. If some other meters are
connected with the same CT , the connection should be serial for all meters.
C. Please make sure that the input voltage is corresponding to the input current, they should have the same phase sequence and direction,
otherwise data and sign error may occur (power and energy).
D. The connection mode of meter which is connected to power network should depend on the CT quantity. For 2pcs of CT, it should be 3 phase
3 wire connection. For 3pcs of CT, it shoud be 3 phase 4 wire connection.
E. Please pay high attention on the difference between 3 phase 3 wire and 3 phase 4 wire connection , becasue wrong connection may lead to
incorrect calculation of power factor, power and energy .
Caution:
1. Power supply connection must be correct.
2. Pay attention on the phase sequence of voltage signal input.
3. Current signal input shoudl be connected as per the connection drawing.
4. Connection mode should accord to the setting of user menu link.
5. Energy pulse output is open collector output.
6. Isolation between power supply and circuit board, in case of leakage switch mis-action.