Danfoss vlt aqua, Инструкция

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3-41 Ramp 1 Ramp-up Time
Range: Function:
Application
dependent* [Application dependant] Enter the ramp-up time, i.e., the acceleration time from 0 RPM to par. 1-25
Motor Nominal Speed
.
Choose a ramp-up time such that the output current does not exceed the current limit in
par. 4-18
Current Limit
during ramping. See ramp-down time in par. 3-42
Ramp 1 Ramp-down
Time
.
par .3 − 41 =
tacc
×
nnorm par
.1 − 25
ref rpm
s
3-42 Ramp 1 Ramp-down Time
Range: Function:
Application
dependent* [Application dependant] Enter the ramp-down time, i.e., the deceleration time from par. 1-25 Motor Nominal Speed to 0
RPM. Choose a ramp-down time such that no overvoltage arises in the inverter due to regenerative
operation of the motor, and such that the generated current does not exceed the current limit set
in par. 4-18
Current Limit . See ramp-up time in par. 3-41 Ramp 1 Ramp-up Time .
par
.3 − 42 =
tdec × nnorm
par
.1 − 25
ref rpm
s
3-84 Initial Ramp Time
Range: Function:
0 s* [0–60 s] Enter the initial ramp-up time from zero speed to Motor Speed Low Limit, par. 4-11 or 4-12. Sub-
mersible deep well pumps can be damaged by running below minimum speed. A fast ramp time
below minimum pump speed is recommended. This parameter may be applied as a fast ramp rate
from zero speed to Motor Speed Low Limit.
3-85 Check Valve Ramp Time
Range: Function:
0 s* [0–60 s] In order to protect ball check valves in a stop situation, the check valve ramp can be utilized as a
slow ramp rate from par. 4-11
Motor Speed Low Limit [RPM] or par. 4-12 Motor Speed Low Limit
[Hz] , to Check Valve Ramp End Speed, set by the user in par. 3-86 or par. 3-87. When par. 3-85 is
different from 0 seconds, the Check Valve Ramp Time is effectuated and will be used to ramp down
the speed from Motor Speed Low Limit to the Check Valve End Speed in par. 3-86 or par. 3-87.
6 How to Program the Low Harmonic Drive
VLT AQUA Low Harmonic Drive Instruction
Manual
6-18
MG.20.T1.22 - VLT
®
is a registered Danfoss trademark
6