Hoffman Controls Model 610 Series - 3 Phase, Across-the-Line, Motor Installation; Single Phase Motor Installation

6
.
Do not route the low voltage CT wires in the proximity of
power wires or wire conduits.
7.
The Model 610 uses Current Transformers (CTs) to monitor
the current flowing through each motor's power wire that is
equipped with a current transformer. The CTs are installed as
shown in
Figure 1
. When more then one (1) CT is used to
monitor motor
(
load) current, all
the installed CTs must be
oriented in the same direction, as shown in
Figure 1
,
Current
Transformer Alignment
(page 3)
Transformer Alignment (page 3)Transformer Alignment
to provide accurate in-phase
information.
8.
For convenience the CT's black wires may be connected
together and a single black wire can be routed to any one of the
Model 610's CT1-, CT2- or CT3- terminals.
To protect 3 phase across-the-line motors, proce
ed with the
3
Phase, Across-the-Line, Motor Installation
section below.
To protect single phase motors, proceed to the
Single Phase
Motor Installation
section below.
To protect 3 phase part (split) winding motors, proce
ed with the
P
art (Split) Winding
Motor
Information
section on page 6.
To monitor compressor temperatures, proceed to the
Com-
pressor Temperature Sensing Information
section on page 12.
To operate the Model 610 remotely, proceed to the
Modbus
RTU Installtion
section on page 15.
1
.
Disable all line power goin
g to the motor contactor and
motor.
2
.
Disconnect all factory wiring connecting the motor to the
load side of the motor contactor.
3.
Refer to
Figure 1, "Current Transform
er Alignment"
(page 3) to install the three (3) current transformers. Place a single
current transformer on each of the three (3) power wires connected
to the m
otor. The sides of the current transformers, with the black
text printed on the yellow background,
must
all be pointed in the
must all be pointed in the must
same direction (CT signals in phase).
4
.
Spacing between the 3 adjacent CTs, shown in
Figure 1
, is
nor critical.
5.
Re-connect the motor's power wiring, removed in step 2
above, to the load side of the motor contactor.
6
.
Referring to
Figure 1
and
Figure 2, "Model 610 3 Phase
Wiring Diagram"
(
page 5)
,
connect the current transformer's
4
3 Phase, Across the Line,
Motor Installation
wires to the Model 610 Digital Current Monitor's CT terminals
a
s
shown in
Table 1
below
.
3 Phase, Across-the-Line,
Current Transformer
Wiri
ng
Table 1
6
.
Connect 24VAC power, as shown in
Figure 2
“
Model 610,
3 Phase Wiring Diagram
” (page 5).
7
.
Connect
the
TRIP
relay's
N.C.
terminal to a 24 VAC source
as shown in
Figure 2
.
8
.
Connect
the
TRIP
relay's
COM
terminal to the 24 VAC side
of the motor contactor's coil
as
shown in
Figure 2
.
9
.
If an
alarm notification is desired, connect the alarm's 24
VAC wires to the
ALARM
relay's
N.O.
and
COM
terminals.
10.
If compressor temperature sensing or Modbus RTU
communication 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
.
11.
This completes the
3 Phase, Across-the-Line, Motor's Model
610 Digital Current Monitor's hardware installation. Continue
with the
Normal Operation
section on
page 11
.
1
.
Disable all line power going to the
motor contactor and
m
otor.
2
.
Disconnect all factory wiring connecting the motor to the
load side of the motor contactor.
WARNING:
Disconnect power from the motor(s) and ensure the motor(s)
is/are electrically disabled prior to the Model 610 Digital
Current Monitor's installation.
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).
Motor Contactor CT Wire Model 610
Load Terminal Color PCB Terminal
T
1
White CT1+
Black CT1-
T2
White CT2+
Black CT2-
T3
White CT
3+
Black CT3-
Motor Contactor CT Wire Model 610
Load Terminal Color PCB Terminal
White CT1+
Black CT1-
Black CT2-
White CT
Black CT3-
Motor Contactor CT Wire Model 610
Load Terminal Color PCB Terminal
White CT1+
Black CT1-
White CT2+
Black CT2-
White CT
Black CT3-
Single Phase Motor
Installation