Hoffman Controls Model 610 Series - Part (Split) Winding Motor Information; Single 610 Part (Split) Winding Motor Installation

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