Danfoss VLT 5000 Series User Manual

Function:
This parameter is for setting the DC braking time for
which the DC braking current (parameter 125) is to be
active.
Description of choice:
Set the desired time.
127 DC brake cut-in frequency
(DC BRAKE CUT-IN)
Value:
0.0 - parameter 202
0.0 Hz (OFF)
Function:
This parameter is for setting the DC brake cut-in fre-
quency at which the DC braking current (parameter
125) is to be active, in connection with a stop com-
mand.
Description of choice:
Set the desired frequency.
128 Motor thermal protection
(MOT.THERM PROTEC)
Value:
No protection (NO PROTECTION) [0]
Thermistor warning (THERMISTOR WARN) [1]
Thermistor trip (THERMISTOR TRIP) [2]
ETR Warning 1 (ETR WARNING1) [3]
ETR Trip 1 (ETR TRIP1) [4]
ETR Warning 2 (ETR WARNING2) [5]
ETR Trip 2 (ETR TRIP2) [6]
ETR Warning 3 (ETR WARNING3) [7]
ETR Trip 3 (ETR TRIP3) [8]
ETR Warning 4 (ETR WARNING 4) [9]
ETR Trip 4 (ETR TRIP4) [10]
Function:
The adjustable frequency drive is able to monitor the
motor temperature in two different ways:
-
Via a thermistor sensor connected to one of
the analog inputs, terminals 53 and 54 (pa-
rameters 308 and 311).
-
Calculation of the thermal load, based on the
current load and the time. This is compared
with the rated motor current I
M,N
and the rated
motor frequency f
M,N
. The calculations made
take into account the need for a lower load at
lower speeds because of less cooling from
the fan.
ETR functions 1-4 do not start calculating the load until
there is a switch-over to the Setup in which they were
selected. This enables the use of the ETR function,
even where two or several motors alternate. For the
North American market: The ETR functions provide
class 10 or 20 motor overload protection in accordance
with NEC.
Description of choice:
Select No protection if no warning or tripping is re-
quired when the motor is overloaded.
Select Thermistor warning if a warning is desired when
the connected thermistor - and thus the motor
- gets too hot.
Select Thermistor trip if cutting out (trip) is desired
when the connected thermistor - and thus the motor
- overheats.
Select ETR Warning 1-4, if a warning is to come up on
the display when the motor is overloaded according to
the calculations.
Select ETR Trip 1-4 if tripping is desired when the motor
is overloaded according to the calculations.
The adjustable frequency drive can also be program-
med to give off a warning signal via one of the digital
outputs, in which case the signal is given both for
warning and for trip (thermal warning).
VLT
®
5000 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.51.C5.22 - VLT
p
is a registered Danfoss trademark. 97
Programming

Danfoss VLT 5000 Series Specifications

General

Brand	Danfoss
Model	VLT 5000 Series
Category	DC Drives
Language	English