Milbank Manual Transfer Switch Owner’s and Installation Manual
15
SET UP
The MMTS monitors power of the selected loads
connected to the MMTS and displays the power output
on each Phase using 8 LED’s for each Phase. After the
MMTS is installed the breakers should be shut off before
applying power to the MMTS. To test the unit turn on
the Utility circuit breaker and turn on each load circuit
breaker.
Figure 4 show the MMTS circuit breakers set properly
before turning on the generator. The MMTS is set for a
10 KW generator at the factory so the LED’s will display
the load on each phase. When first turned on 3 green
lights will represent 4 KW on each side. If the load is not
balanced, within 1 LED on each side, it is recommended
to redistribute the loads to balance correctly. In between
LED positions the top most LED will flash, it will flash
at a slow rate when the represented power is close
to the lower position and increase in its frequency
as it approaches the next level. After the MMTS has
been tested the MTS can be trained to adjust LED’s
to represent the size of the generator being used. This
feature is described as Learn Function.
Figure 4 – Circuit breaker Setup
On models with a digital meter the LED display shows
power as a percentage of generator capacity and requires
the MMTS to be calibrated to the size of the generator
being used. To make this calibration the MMTS has a
“Learn” button and can be set in a few easy steps. The
MMTS’ factory default is for a 10,000 watt generator so
if it is not calibrated to the generator being used it will
only display 100% when the power passing through the
switch is at 10kw or 41.6 Amperes. Setting the capacity
of the generator is the responsibility of the installer or the
operator.
There are a few things to keep in mind when using the
learn function:
• The display meter is nonlinear and will display a
higher resolution when the unit approaches 100%,
so at the lower levels the LEDs will accumulate at a
faster rate.
• The LEDs on the display represent a percentage
of the generator capacity and not an actual value
of power. In between LED positions the top most
LED will flash, it will flash at a slow rate when the
represented power is close to the lower position and
increase in its frequency as it approaches the next
level. When the power reaches the next level it will
turn solid and the next LED above will begin to flash
at the slower rate.
• When operating on utility power the meter will
continue to display the percent of power based on
the calibration that was set for the generator; when
on utility power it will often display more than 100%
and this is normal.
• The Learn Function measures power on each phase
of the 240v; each side of the meter represents ½
the calibrated capacity of your generator. To get
optimal performance from your generator and to
prevent premature shutdowns, it is important that
you maintain a balanced load on the circuits in the
switch.
• The Learn Function should only be performed after
the switch is fully installed and running on generator
power. The Learn Function can be rerun at any time
after installation to calibrate for a different generator
or to recalibrate to the original generator for better
performance.
GENERATOR CAPACITY DISPLAY & LEARN FUNCTION:
(AVAILABLE ON MMTS301SYS & MMTS501SYS)
