DBT12 Operations Manual....
20
6.2.
OPERATION
The unit constantly monitors the input voltage and selects the appropriate gain according to the
following logic:
a.
When the input voltage is decreasing, the unit will go to BOOST1 at 228V, to BOOST2
at 211V and to BOOST3 at 196V.
b.
When the input voltage is increasing, the unit will go to BOOST2 at 203V, to BOOST1 at
217V and to 1:1 at 233V.
c.
A gain change will occur only after the target gain has been continuously higher or
continuously lower than the current gain for a time period of 15 minutes, and only if the
load is up to the continuous rated value.
Figure 8: Voltage Chart Indicating the Gain Selection Hysteresis
6.3.
TURN-OFF PROCEDURE
Turn the circuit breaker to the OFF position. The unit will open the input and output contactors
and then power off.
1:1
BOOST1
BOOST2
BOOST3
170
180
190
200
210
220
230
240
250
260
270
G
a
in
Input Voltage, Vin
Vin
↗
Vin
↘