Huawei DTSU666-HW/YD Series Quick Manual page 10

3.4
Connection Through Current Transformer and Potential
3.5
Transformer (Current ≥ 0 A, Line Voltage > 500 V)
• Three-phase four-wire connection
Current
transformers
•
Three-phase three-wire connection
Cable outlet (OUT)
Current
transformers
Cable inlet (IN)
UA UB
Cable outlet (OUT)
Cable inlet (IN)
UA UB UC UN
UC
9
Please ensure that the
ground cable is installed
securely. Poor grounding
may cause electric shocks.
You need to set parameters
after cable connections are
complete. For details, see
section 4 "Display and
Parameter Settings".