BECKWITH ELECTRIC M-0420, Инструкция

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M-0420 Instruction Book
6–10
6.5 Suggested VT Connections
18 17 16 15 13
M-0420
A
B
C
V
C
V
B
V
A
14
■
NOTE: On the internal configuration DIP switch,
select line-to-ground for basic VT input and ei-
ther 69.3 V ac or 120 V ac for VT secondary
voltage.
Figure 6-6 Connections for Wye-Wye-
Connected VTs
18 17 16 15 14 13
M-0420
A
B
C
V
CA
V
BC
V
AB
■
NOTE: On the internal configuration DIP switch,
select line-to-line for basic VT input and either
69.3 V ac or 120 V ac for VT secondary voltage.
Figure 6-7 Connections for Open-Delta-
Connected VTs
18 17 16 15 14 13
M-0420
A
B
C
V
CA
V
BC
V
AB
■
NOTE: On the internal configuration DIP switch,
select line-to-line for basic VT input and either
69.3 V ac or 120 V ac for VT secondary voltage.
Figure 6-8 Connections for Delta-Wye-
Connected VTs
6.6 UL-LISTED TERMINAL BLOCK
CONNECTIONS
Serial Numbers 145 and above are listed to UL
Standards for Safety by Underwriters Laborato-
ries Inc. (UL). To fulfill the UL requirements, ter-
minal block connections must be made as
illustrated in Figure 6-9: the wire should be No.
12 AWG inserted in an AMP #324915 (or equiv-
alent) connector, and both screws tightened to
20 inch-pounds torque.
12 AWG
AMP #324915
or equivalent
Recommended Wire Terminations
Ti
ghten to 20 inch-pounds
Figure 6-9 Wire Terminations for External
Connections as Required for UL Listing