Hoffman Controls Model 610 Series Manual

If one of the above conditions occurs, the Model 610 operates a
TRIP
relay to disconnect power from the load. An
ALARM
relay is also provided
that can be used to alert operators of a lockout condition. The number of
automatic trip resets allowed before a lockout occurs is operator selectable.
The
automatic
trip reset time is also selectable.
When protecting
3 phase loads, t
When protecting 3 phase loads, tWhen protecting
he Model 610 detects phase
The class II Model 610 Digital Current Monitor offers the latest
technology for providing positive and accurate over current motor
(load) protection for single, and 3 phase motors, drawing between 5
and 200 amps. The Model 610 also can monitor up to two thermistor
temperature sensors to detect abnormally high and/or low compressor
operating temperatures.
Motor protection is accomplished by monitoring the operating
motor current, in each phase of the load, using current transformers.
For both single and 3 phase loads, the control digitally processes the
sampled current and calculates the excess energy being absorbed by
the motor due to current flow above the operator selected trip level.
If the current is above the selected trip level, the controller calculates
the excess power and integrates to calculate excess energy. When the
excess energy rises to a level equivalent to locked rotor for 2 seconds,
a current trip will occur. If the current drops below the trip level prior
to a trip, the controller will reset the integration to zero. This prevents
false-alarm trips. Fail-safe operation is provided by protecting the load
from excessive current or abnormal temperatures in one or more of
the following overload conditions:
Hoffma
n
|
Controls
Complete
Installation & Opera-
Complete Installation & Opera- Complete
ting Instructions for Model
702-0610-325
Model 610
Digital
Current Monitor
1
Introduction
imbalance
and can also verify correct phase rotation during each
load's startup.
Setting the current trip level at 8% above the nominal FLA of the
motor will indirectly provide both low and high voltage protection.
Setting the current trip level at other percentage levels above FLA will
directly prot
ect the motor.
The optional, customer supplied, Omega 10K thermistor tempera-
ture sensors can be used to monitor compressor exhaust temperature
and crankcase oil temperature. Omega offers a wide range of therm-
istor sensors that are readily available. The trip temperature values are
operator selectable. The Exhaust high temperature value can be set
between
80
°
F
and
300
°
F
or between
100 Ohms
and
2
0K Ohms
.
The Oil temperature trip values can be set for high, low or both high
and low trip temperatures between
20
°
F
and
200
°
F
or between
200
Ohms
and
2
0K Ohms
. Consult factory for different temperature
ranges.
This micro controller based Model 610 Digital Current Monitor is
available in four different models:
1)
Model 610-1PH
Provides single phase motor protection
2)
Model 610-3PH
Provides three phase or single phase motor
protection
3)
Model 610-1PH(MOD)
Provides single phase motor protec
tion and Modbus RTU remote
operation.
4)
Model 610
-3PH(M
OD
)
P
rovides
three phase
or single phase
motor
protection
and
Modbus
RTU
remote
operation
.
All four Model 610 Digital Current Monitor models can be
operated locally using the four push buttons and
LCD
screen. The
two Modbus models [ending in
(MOD)]
can also be operated
remotely using a Modbus RTU master controller.
All Model 610 Monitors operate on 24 VAC (2.5 VA).
The Model 610 Current Monitor consists of
a Kydex covered
PCB on standoffs, with a 32 character LCD and four push
buttons. The LCD is used 1)
to
display operational information
and 2) for setting parameters and numerical values via a menu
system. The menu system allows the operator to:
1)
Reset a trip
2)
Select the number of monitored current phases.
3)
Select the over current trip level.
CAUTION:
Failure to read, understand and follow the accompanying
instructions and diagrams, prior to completing the instal-
lation, may result in permanent damage to the motor.
�
Electrical Overcurrent Mechanical Overload
Single & 3 Phase Wear
Phase Imbalance Binding
Low/High Voltage Friction
Locked Rotor Stall
Power Factor Torque
Compressor Temperature Abnormalities
High Exhaust Temperature
High and/or Low Oil Temperature
Description
IMPORTANT:
When using the Model 610 Digital Current
Monitor, select
a transformer to meet the requirements of all the 24 VAC
components being used.
�
Single & 3 Phase Wear
Phase Imbalance Binding
Low/High Voltage Friction
Locked Rotor Stall
Power Factor Torque

2
4)
Activate or de-activate
checking phase order on power up.
5)
Select the % phase imbalance trip level.
6)
Select the phase imbalance delay time.
7
)
Select the type of exhaust and / or oil temperature sensors used
and their trip levels.
8
)
Select the number of automatic trip resets before lockout
occurs.
9
)
Select the delay time between automatic reset attempts.
10
)
Select when an external alarm should be activated.
1
1
)
Select the Modbus RTU settings.
12)
Restore the control to factory default settings.
During normal operation, all the Model 610 Monitors' LCDs
display a Home Screen which shows the following information:
1)
The present amp draw from the load's phase that is car-
rying the highest current.
2)
The present highest sensed temperature value. When both the
Exhaust
and
Exhaust and Exhaust
Oil
sensors are activated, only the sensor that has
the highest temperature is displayed on the Home Screen.
3)
The number of automatically reset trips allowed before a
lockout occurs.
4)
The number of automatically reset trips that have occurred
since the last
lockout
occurred, whether
triggered
locally
or remotely
.
or remotely. or remotely
By pressing the
DOWN
button during normal operation, the
LCD will display, in real time, all three phase currents in amps, and
both sensor
temperatures in
°
F
, even when the
F, even when theF
y are not being used
(installed) or have not been selected
. The unused phase currents and
temperature sensor values are displayed as "
0
".
By pressing the
UP
button during normal operation, the LCD
will display the following information about the last trip that
occurred:
1)
The trip type (current, phase imbalance, temp high, temp low,
phase order).
2)
The value that caused the trip, and the time in hours since the
last trip occurred (up to 32,000 Hrs.).
3)
The stored current values, for all three phases, that caused a
phase imbalance during motor startup.
During a tripped condition, the LCD will display “
TRIPPED
”.
If the trip has resulted in a lockout, then “
MANUAL RESET
RQD
” will be displayed on the LCD.
All the Model 610's have an automatic time out that returns the
LCD to the Home Screen whenever the control's push buttons have
not been pressed for more then 5 minutes. If the time out occurs
before any menu changes have been saved (by pressing the
ENTER
button), the unsaved changes will be ignored.
The Model 610 Digital Current Monitor can be used for local,
remote or a combination of both local and remote operation.
The Model 610 Digital Current Monitor can be operated manu-
ally using the four (4) push buttons and LCD screen. The push
buttons (
MODE
,
UP
,
DOWN
and
E
NTER
) allow the installer to
NTER) allow the installer to NTER
use the LCD's menu system to select the desired mode and then
set the available options, parameters and numerical values associ-
ated with that particular mode.
The Model 610 Digital Current Monitor has six (6) modes with
each mode containing the specific menus
, submenus, parameters
and numerical value selections needed to implement that mode's
capabilities.
The LCD display routinely shows a Home Screen.
The
installer
can
verify or m
odify the Model 610's operation by
pressing the
MODE
button, a specific number of times, to
MODE button, a specific number of times, to MODE
enter the desired
mode
. After that mode's selected parameters and numeric values
have been reviewed or
updated, the Model 610's LCD automati-
cally returns to the Home Screen. To continue viewing or updating
another mode's parameters, the installer needs to press the
MODE
button the required number of times to enter that mode, as shown
in
TABLE 1
(below)
.
MODE
Button
Presses
Mode Displayed on LCD
1
Manual Reset
2
Current Trip Settings
3
Temperature Trip settings
4
Trip Auto Reset and Alarm
5
Modbus Settings
6
Reset Controller (to factory settings)
Number of Mode Button Presses
TABLE 1
By
pressing the
ENTER
button when one of the above modes
ENTER button when one of the above modes ENTER
is displayed on the LCD's screen, the operator enters that mode's
menus and submenus where specific actions can be taken and
specific numeric values can be set, using the
UP
and
DOWN
buttons. When that specific menu or submenu's selection is
correct, for the application,
press the
ENTER
button to
ENTER button to ENTER
save the
displayed setting and advance to the next submenu. Once all of
the mode's submenus have been displayed, pressing the ENTER
button one more time returns the LCD to the Home Screen
. Any
values or parameters that are changed are stored in the Model 610's
flash memory and will be retained during any power interruption.
R
emote operation requires a Modbus version of the Model 610
Remote operation requires a Modbus version of the Model 610 R
Digital Current Monitor
[models ending in "MOD"
that is con
Description Con't
IMPORTANT:
After updating any information displayed on the LCD's
screen, the installer MUST review ALL of the Model
610 Digital Current Monitor's mode, menu, submenu
and numerical value options to 1) ensure that all of the
operating parameters, needed for the application, have
been correctly selected and 2) also ensure that any un-
needed or undesired options or numerical values have
not inadvertently been left selected.
�
During
Local (Manual) Operation:
During Local (Manual) Operation:During
During
Remote Operation:
During Remote Operation:During

ne
ct
ed to a Modbus RTU communication link. A Modbus RTU
Master Computer is used to read and / or write data to any or all
of the
internal data registers of
each
Model 610
connected to the
communication link
.
Remote operation can be implemented, at any time, by using
a Modbus RTU master computer to send the appro
priate register
data, listed in
Table
6A & 6B
,
on pages 13 & 1
4
,
to the Model
610's internal data registers, via a 3 wire Modbus RTU connection.
All of the Model 610's
options,
parameters and numerical values
can be read and set remotely using the Modbus
RTU connection.
NOTE:
Since t
he Model 610's operation is controlled by the
data stored within its internal registers, the Model 610
provides
the same identical operation,
whether
the register data is changed
locally (
m
anually) or remotely.
When
the Model 610 is equipped with Modbus, all sensed
current and temperature values, all trip information, and all
settable parameters and numerical values can be remotely viewed
and/or updated using a Modbus RTU master computer. The
Modbus RTU
master computer can read and or write information
(data) to each
Model 610
connected to Modbus. See the
Modbus
RTU Operation
section
(page 16) for additional information.
A combination of local and remote operation can be used to
remotely download and verify any of the Model 610's updated
parameters and numerical values. An installer observes local opera-
tion after the download, then makes and verifies any further
operational improvements, before the register data is uploaded to
the remote site and saved for future use.
1.
The Model 610 Digital Current Monitor is designed for u
se
with single phase or three (3) phase motors (across
-
the-line or part
3
Description Con't
Installation
[split] winding) that draw between 5 and 200 amps.
2.
The
TRIP
and
ALARM
relays' maximum output ratings are:
24 VAC at 10 Amps each.
3.
Wiring must comply with Local and National Electrical
Codes.
4.
Locked Rotor Amps (LRA) is calculated as 5 times the motor’s
running (trip) amps.
5
.
Do not mount the Model 610 in an airtight cabinet/compart-
ment or on a vibrating surface.
For Both Local and Remote Operation:
NOTE:
The Model 610 Digital Current Monitor is not weatherproof
and needs to be protected from moisture and condensation
.
IMPORTANT:
T
he
TRIP
and
ALARM
relays'
N.O.
and
N.C.
terminal
names correctly identify the functions of these terminals
after 24 VAC power is applied to the Model 610. When
24 VAC power is turned off, the TRIP and ALARM
relay's
N.O.
to
COM
contact is
closed
and the
closed and the closed
N.C.
to
COM
contact
is
open
.
This arrangement was chosen to
enab
le the Model 610 Digital Current Monitor to discon-
nect power to the motor and enable an alarm in the event
that the Model 610 Digital Current Monitor loses power
or fails.
�
Current Transformer Alignment
Figure 1
IMPORTANT:
If any of the down loaded Modbus RTU data is incor-
rect, the Model 610 Digital Current Monitor's micro-
controller will change the incorrect data into software
selected default values during the Model 610's next
operating cycle. Therefore, after updating any data
manually or remotel
y,
manually or remotely,manually or remotel
th
e operator
MUST
allow the
Model 610 to operate
for a brief time period
before re-
for a brief time period before re-for a brief time period
viewing ALL of the data contained in each of the
Model
610
's
3
2
register addresses to 1) ensure that all of the
operating parameters and numerical values, needed
for the application, have been correctly selected and 2)
also ensure that any unneeded or undesired options or
numerical values have not inadvertently been left
selected.
�

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

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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


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-

6
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



11.
This completes the
Single
Phase Motor's
610 Digital
Current Monitor's hardware installation.
Continue with the
Normal Operation
section on page 11.
Part (
s
plit)
winding motors can be protected, using either one
(1) or two (2) Model 610
Digital
Current Monitors, by following
one of the two methods shown below and on the next page:
Method 1:
This method uses only one (1) Model 610
Digital
Current Monitor
by placing two CTs on
Starter
A
phases
A phases A
T
1
and
T
2
, and placing the third CT on the
Starter
B's
phase
T
3
. Set the
phase imbalance trip point at 29% or less. The current trip level
should be the motor FLA times 1.08 (8% about the FLA). This
method will protect against all major faults in either part winding.
Method 2:
This method uses two (2) Model 610 monitors by
placing one (1) CT on each power wire connected to both of the
Starter A
and
Starter A and Starter A
Starter B
motor contactor's
T1
,
T2
and
T3
termi-
nals (total of
6 CTs)
.
This method provides complete coverage.
The
selected trip current level, used by each Model 610, should be 1/2
FLA
(the current allowed in each part winding times 1.08 [for 8%
over current])
.
To protect a 3 phase part (split) winding motor, using a single
Model 610
Digital
Current Monitor (
M
ethod 1), proceed to the
Single 610 Part (Split) Winding Motor Installation
section below.
To protect a 3 phase part (split) winding motor, using two
Mod-
el 610
Digital
Current Monitors (
M
ethod 2), proceed to the
Dual
610 Part (Split) Winding Motor Installation
section on page 8.
1
.
Disable all line pow
er going to both the
Starter A
and
Starter A and Starter A
Starter
B
motor contactors and motor.
Single 610 Part (Split)
Winding Motor Installation
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.
Single Phase Motor
Installation Con't
NOTE
:
T
he Model 610 Digital Current Monitor
allows a
he Model 610 Digital Current Monitor allows a he Model 610 Digital Current Monitor
part (
split) winding
motor's 2
nd
he Model 610 Digital Current Monitor
nd
he Model 610 Digital Current Monitor
circuit to energize
for an operator selectable 2.0 to 30.0 seconds, after
power is applied to the
1
st
part (split) winding cir-
st part (split) winding cir- st
cuit,
prior to checking for
phase rotation errors or
phase imbalance issues
.
The default is 3.0 seconds.
Part (Split) Winding Motor
Information

7
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


2.
Disable all factory wiring connecting the motor to the load
side of the
Starter A
motor contactor.
Starter A motor contactor.Starter A
3
.
Refer to
Figure 1, "Current Transformer Alignment"
(page 3) to install the current transformers.
Place a single
current
transformer on each
power wire
connected to the m
otor
that was
previously connected to
the
Starter A
contactor's load side
Starter A contactor's load side Starter A
T1
and
T2
terminals.
4
.
Re-connect the motor's power
wiring, removed in step
2
above, to the load side of the
Starter A
motor contactor.
5
.
Disconnect the factor
y wiring connecting the motor to the
T3
terminal on the load side of the
Starter
B
motor contactor.
6
.
Refer to
Figure 1
(page 3) to install a single current trans-
former
on the motor's
power wire
that was
previously connected
to
the
Starter
B
contactor's load side
T3
terminal. Orient this
third CT in the same direction as the two (2) CTs on the
Starter A
phases
T1
and
T
2
.
7
.
Spacing between adjacent CTs, shown in
Figure 1
, is not
critical.
8.
Re-connect the motor's power
wiring, removed in step
5
above, to the
T3
terminal on the load side of the
Starter
B
motor
contactor.
9
.
Referring to
Figure 1
and
Figure
4, "Single Model 610 Part
(Split) Winding Motor Wirin
g Diagram"
(page 7),
connect the
current transformer's
wires to the Model 610 Digital Current
Monitor's CT terminals
a
s shown in
Table 3
on
page
8
.
10
.
Connect 24VAC power as shown in
Figure
4,
Single
Model
610 Part (Split) Winding Motor Wiring Diagram
(above).
1
1
.
C
onnect
the
TRIP
relay's
N.C.
terminal to a 24 VAC source
as shown in
Figure
4
.
1
2
.
C
onnect
the
TRIP
relay's
COM
terminal to the 24VAC
side of both the
Starter A
and
Starter A and Starter A
Starter B
motor contactors' coils as
shown in
Figure
4
.
Single 610, Part (Split)
Winding Motor Installation
Con't
Single Model 610 Part (Split) Winding Motor Wiring Diagram
Figure 4

Single 610, Three Phase Motor
Current Transformer Wiring
Table 3
13.
Verify the
Starter A
and
Starter A and Starter A
Starter B
, 24 VAC coils are wired
in parallel with the Model 610
TRIP
relay's
COM
terminal.
1
4
.
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
4
.
15.
If compressor temperature sensing or Modbus communi-
cation 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
Mobus RTU Installation
section (page 15)
for details
.
16.
This completes the
Single 610 Part (Split) Winding
Motor's
Single 610 Part (Split) Winding Motor'sSingle 610 Part (Split) Winding
Model
610 Digital Current Monitor's hardware installation.
Continue with the
Normal Operation
section on page 11.
1
.
Disable all line pow
er going to the
Starter A
and
Starter A and Starter A
Starter B
motor contactors and split winding motor.
2
.
Disconnect all factor
y wiring connecting the motor to the
load side
of the
Starter A
motor contactor.
Starter A motor contactor.Starter A
3
.
Refer to
Figure 1
(page 3) to place one (1) current trans-
former
on each of the
power wires (with all CTs facing the same
8
way)
connected to t
he m
otor
that were
previously connected to
the
Starter A
contactor's load side terminals
Starter A contactor's load side terminals Starter A
T1
,
T2
and
T3
.
4
.
Referr
ing to
Figure
5
,
Dual Model 610 Part (Split) Winding
Motor Wiring Diagram
(page 9). Connect each of the current
transformer's
wires to the
# 1
Model 610 Digital Current
Monitor's CT terminals
a
s shown in
Table 4
(below)
.
Dual 610 Part (Split) Winding Motor Starter A
Current Transformer
Wiring
TABLE 4
5
.
Re-connect the motor's power
w
i
ring, removed
in
step
2
above, t
o the load side of the
Starter A
motor contactor.
6
.
Disconnect all factor
y wiring connecting the motor to the load
side of the
Starter
B
motor contactor.
7
.
Refer to
Figure 1
(page 3) to place three current transformers,
one (1) current transformer
on each of the
power wires
(with all
CTs facing the same way)
connected to the m
otor
that were
previ-
ously connected to
the
Starter
B
contactor's load side terminals
T1
,
T2
and
T3
.
8
.
Re-connect the motor's power
wiring, removed in step
6
above, to the load side of the
Starter
B
motor contactor.
9
.
Referring to
Figure
5
,
Dual Model 610 Part (Split) Winding
Motor Wiring Diagram
(page 9),
connect the current transformer's
wires to the
# 2
Model 610 Digital Current Monitor's CT termi-
nals
a
s shown in
Table 5
(
page
11
)
.
10
.
Connect 24 VAC power as show
n in
Figure
5,
“
Dual
Model
6
10 Part (Split) Winding Motor Wiring Diagram
” (page 9) to
both the
#
1
and
#
2
Model 610's.
1
1
.
C
onnect a
24 VAC source to
the
#
2
Model 610
TRIP
relay's
N.C.
terminal, as shown in
Figure 5
.
1
2
.
C
onnect
the
#
2
Model 610
TRIP
relay's
COM
terminal
to
the
#
1
Model 610
TRIP
relay's
N.C.
terminal
, as shown in
Figure
5.
Continued on page 11
Single 610 Part (Split)
Winding 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).
Dual 610 Part (Split) Winding
Motor Installation
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.
Motor Contactor
#
1
Model 610
Starter A Starter B
CT Wire
PCB
Terminal Terminal
Color
Terminal
Color TerminalColor
T
1
N/A White CT1+
Black
CT1-
T2
N/A
White CT2+
Black CT2-
T3
N/A
White CT
N/A White CTN/A
3+
Black CT3-
Starter A Starter B
Terminal Terminal
N/A White CT1+
Black
N/A
Black CT2-
Black CT3-
Motor Contactor
Starter A Starter B
Terminal Terminal
N/A White CT1+
Black
N/A
Black CT2-
White CT
Black CT3-
CT Wire
Terminal
N/A White CT1+
Black
White CT2+
Black CT2-
White CT
Black CT3-
Motor Contactor
Starter A Starter B
CT Wire Model 610
Terminal Terminal
Color
PCB Terminal
Color PCB TerminalColor
T
1
N/A White CT1+
Black CT1-
T2
N/A
White CT2+
Black CT2-
N/A
T3
White CT
3+
Black CT3-
Starter A Starter B
Terminal Terminal
N/A White CT1+
Black CT1-
N/A
Black CT2-
N/A
Black CT3-
Motor Contactor
Starter A Starter B
Terminal Terminal
N/A White CT1+
Black CT1-
N/A
Black CT2-
White CT
Black CT3-
CT Wire Model 610
PCB Terminal
N/A White CT1+
Black CT1-
White CT2+
Black CT2-
White CT
Black CT3-

9
Dual Model 610 Part (Split) Winding Motor Wiring Diagram
Figure 5
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
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

10
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