User’s Manual
25
2.
Remove power from the inverter only.
M3534R module
RT ACTIVE
LED will come
ON
for duration of
event. LED intensity is directly related to load levels.
When fully loaded, the inverter DC bus will drop to the minimum
regulated voltage level as defined in Table 6-2 in Section 6.1 of
this manual.
Inverter should be able to keep motor speed and torque constant.
CAUTION!
Remember not to exceed the 2-second sag duration limit for this test.
Also, this test should not be repeated with a frequency that exceeds the
module’s 1% duty cycle rating.
4.4. O
PERATIONAL
A
DJUSTMENTS
4.4.1. T
HRESHOLD
V
OLTAGE
A
DJUSTMENT
P
ROCEDURE
F
OR
M
ODEL
M3534
R
IDE
-T
HRU
M
ODULES
The "Threshold" voltage level is the voltage at which the Bonitron Model
M3534 Ride-Thru module maintains the DC bus during a power dip.
Whenever the DC bus level drops to the "Threshold" setpoint, the Ride-Thru
module becomes active to regulate the DC bus voltage to the "Threshold"
setpoint voltage.
Generally, the “Threshold” level should be set at 10-15% below the nominal
DC bus level. If running on single phase system, threshold and battery levels
may need to be lowered to prevent excessive activity. An actual on-site level
setting must be determined by the loaded DC bus level as well as the amount
of ripple present on the DC bus. The Ride-Thru Module should not become
active during normal everyday operation.
During a test cycle the "Test boost" level is typically elevated 17% above
threshold on all Bonitron Model M3534 Ride-Thru Modules. These
approximate levels are specified in the General Specifications section of the
Customer Reference manual for each Ride-Thru module and are based on
the original factory setting of the threshold level. Some field adjustment of
this level may be required to achieve the optimum setpoint level for any given
system.
Table 4-7 lists the typical
factory setpoints for the "Threshold", “Over-
V
oltage”, and "Test Boost" levels for the Model M3534 Ride-Thru modules
based on the system AC or DC input voltage requirements. Be sure to check
the Customer Reference manual for each Ride-Thru module for specific
setpoint levels.
