Hoffman Controls Model 610 Series - Page 5

Single Phase Current Transformer
Wiring
TABLE 2
10.
If compressor temperature sensing or Modbus RTU com-
munication is desired,
refer to
Figure 7
,
Model 610 Exhaust
Sensor, Oil Sensor and Modbus Wiring Diagram
(
page 13
)
and
the
Compressor Temperature Sensing Information
section (page
12) and / or the
Modus RTU Installation
section (page 15)
for
details
.
5
3
.
Refer to
Figure 1, "Current Transformer Alignment"
(page 3) to install the single current transformer
(CT) on the
power wire connected to the m
otor. The CT's orientation is not
important.
4
.
Re-connect the motor's power wiring, removed in step 2
above, to the load side of the motor contactor.
5
.
Referring to
Figure
3, Model 610 Single Phase Wiring
Diagram (
page 6
)
, connect the current transformer's
wires to the
Model 610 Digital Current Monitor's CT1 terminals
a
s shown in
Table 2, "
Single Phase
Current Transformer Wiring"
"
(
page
5
)
.
6
.
Connect 24VAC power as shown in
Figure
3
.
7
.
Connect
the
TRIP
relay's
N.C.
terminal to a 24 VAC source
as shown in
Figure 3
.
8
.
Connect
the
TRIP
relay's
COM
terminal to the 24VAC side
of the motor contactor's coil,
as shown in
Figure 3
.
9
.
If an
alarm notification is desired connect the alarm's 24
VAC
wires to the
ALARM
relay's
N.O.
and
COM
terminals,
as shown
in
Figure 3
.
Single Phase Motor
Installation Con't
WARNING:
Current Transformer wires
must
be c
must be cmust
onnected to
the Model 610 Digital Current Monitor's terminal
block before operation of the motor. The Current
Transformers will generate high voltages if the wires
are left unconnected (open circuited).
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
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Motor Contactor CT Wire Model 610
Load Terminal Color PCB Terminal
T
1 White CT1+
Black CT1-
Motor Contactor CT Wire Model 610
Load Terminal Color PCB Terminal
1 White CT1+
Black CT1-
Motor Contactor CT Wire Model 610
Load Terminal Color PCB Terminal
1 White CT1+
Black CT1-