Nice UST1KL Instruction Manual page 4

THREE-PHASE 3 400V
3 230V
A
B
U
V
W
UST1K - UST1KL
A
D
C
B
NDA021
C
PE
U V W
L1 L2 N
RDFN - RDN - HDFN
1
2
A
D
B
C
A
C
5
CA0177B00
CA0178B00
CA0179B00
6 7
3
4
D
B
IS0343A00MM_05-06-2014