Franklin Electric SUBMONITOR CONNECT MT1111, Installation And Operation Manual

Page: 14 / 232

INSTALLATION AND SETUP
Electrical Installation
14
MT1111/MT6111: Route Motor Wires Through Sensors
For MT1311/MT2211, go to “Start-Up Programming” on page 15 .
The SubMonitor Connect input power is connected at the terminal block on top of the device. The phase
order (relationship) to the motor must match the phase order to the power connection, i.e. connections
directly match to the phases that pass through the sensors:
L1-Phase A/T1 | L2-Phase B/T2 | L3-Phase C/T3.
Route the T1, T2, and T3 motor power leads
through the sensors in the SubMonitor Connect
from top (power side) to bottom (motor side).
IMPORTANT:
The SubMonitor Connect has a
built in phase sequence meter. If upon initial
power up, the SubMonitor Connect displays a
Phase Reversal, Low Power Factor, Low Power,
or Negative Power fault, the incoming
voltages at L1, L2, and L3 terminals are in a
negative sequence (compared to the phase
sequence of the sensors), and the contactor is
locked out until the phase sequence is
corrected. Default phase order is A-B-C, but
you can change it to A-C-B.
Refer to
“Programming: Advanced Setup > Motor
Protection > Voltage” on page 21 . Look for Phase
Order at Modbus address 451.
High Current Installations using Current Transformers (CT)
High current installations (above 135 A) require the use of external Current Transformers (CT) for the
SubMonitor Connect to accurately monitor the motor current. Ground Fault protection is disabled when
using external current transformers.
1. Ensure that all system power is off. More than one
disconnect may be required.
2. Locate three identical turn ratio CTs. The turn ratio
(or transform ratio) is usually printed on the exterior
of each CT.
3. Run a (motor) wire from the Disconnect through the
center of a CT before connecting to the Contactor.
The arrow label on the CT points to the line side of
supplied power. Repeat for the other two wires.
NOTE:
Current in the wires routed through the Sub -
Monitor Connect internal CT sensors shall not exceed
135 A. Use higher capacity CTs for motor wire current
exceeding 135 A to avoid a safety issue and/or prod
-
uct damage.
4. Maintaining phase relationships, L1 to Phase A, L2 to
Phase B, and L3 to Phase C, route one of the two CT
wires through the SubMonitor Connect sensors.