Danfoss VLT 5000 FLUX User Manual

VLT
®
5000 FLUX
Reference
Handling
If flying start is selected, there will be three situations
in which the function is activated:
1. After a coast has been given via terminal 27.
2. After power-up.
3. If the frequency converter is in a trip state and
a reset signal has been given.
1. Flying start is active (parameter 445 [1]).
2. Flying start is active (parameter 445 [1]).
The search sequence for the spinning motor depends
on Rotation, spee d /direc tion (parameter 200). If only
clockwise is selected, the frequency converter will
start looking from Maximum speed (parameter 202)
down to 0 rpm. If the frequency converter does not
find the spinning motor during the search sequence,
itwillcarryoutaDCbrakingsoastotrytobringthe
speed of the spinning motor down to 0 rpm. This
requires that the DC brake is active via parameter 125
and parameter 126. If Both directions is selected, the
frequency converter will first detect in which direction
the motor rotates and then search for the speed.
If the motor is not detected, the system assumes
that the motor is at a standstill or is rotating at a low
speed, and the frequency converter will start the
motor in the normal way after searching.
3. The frequency converter trips and Flying
start is active.
■ Normal/high overload torque control
This function enables the frequency converter to perform
a constant 100% torque, using an oversize motor.
The choice between a normal or a high overload torque
characteristic is made in parameter 101.
If a high torque c h aracteristic is chosen, a rated motor
with the frequency converter obtains up to 160%
torque for 1 min. If a normal torque characteristic
is chosen, an oversize motor allows up to 110%
torque performance for up to 1 min.
The advantage of choosing a normal torque
characteristic for an oversize motor is that the frequency
converter will be able constantly to yield 100% torque,
without derating as a result of a bigger motor.
NB!:
This function c
annot be chosen for VLT
5001-5006, 200-240 Volts, and VLT
5001-5011, 380-500 Volts.
MG.55.A6.02 - VLT is a registered Danfoss trademark
59

Danfoss VLT 5000 FLUX Specifications

General

Brand	Danfoss
Model	VLT 5000 FLUX
Category	DC Drives
Language	English