QUANTUM™ HD COMPRESSOR CONTROL PANEL
OPERATION
090.040-O (MAR 12)
Page 36
• DBS Recycle Delay Timeout – The motor has
exceeded its Thermal Capacity and will not be
allowed to start until enough time has elapsed to
allow the motor to cool.
• Bypass Time – When the controller is set for
Constant Current, a 10-position switch (SW3) on
the main control board of the DBS, (adjustable
from 3-30 seconds) sets the bypass time. The
bypass time for Step Ramp mode is 5 seconds,
plus Ramp time.
• Ramp Time – A 10-position switch (SW3), on
the main control board of the DBS, is adjustable
from 3-30 seconds and sets the time in seconds
in which the current rises in the Step Ramp mode
from its initial Current Step level to 500% FLA.
• Constant Current Level – A 10-position switch
(SW2), located on the main control board of the
DBS, sets the initial current step of the controller
in either Constant Current or Step Ramp mode.
This switch is adjustable from 200-425% FLA for
smooth acceleration. When the controller is set
for Constant Current, this switch sets the maxi-
mum current limit for the motor in this mode of
operation. This current is maintained until the
motor reaches full speed. When the controller
is set for Step Ramp, this switch sets the initial
current limit, and then allows the controller to
continue its ramp to 500% FLA.
• Thermal Overload Status – If this feature has
been enabled, then a trip will occur if the ther-
mal energy stored in the motor exceeds 100% of
motor Thermal Capacity. The estimated temper-
ature of the motor windings is calculated based
on the highest phase current. The overload trip
level is computed based on the following set-
points: Full Load Amps, Locked Rotor Current,
Stall Time, and Service Factor. A start will not be
allowed until the motor has suffi ciently cooled.
NOTE: Contact Schneider Electric at 800-220-8697 with
any further questions concerning the setup and operation
of the RAM DBS.
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