Danfoss VLT 5000 Series, Instruction Manual, Page: 91 / 240

Normal-variable torque with medium con-
stant
starting torque
(N-VT MED W. CT-START)
[17]
Normal-variable torque with high constant
starting torque
(N-VT HIGH W. CT-START)
[18]
Function:
In this parameter, the principle for adjusting the U/f
characteristics of the adjustable frequency drive to the
torque characteristics of the load is selected. By
changing between the different torque characteristics,
bumpless transfer (voltage only) is ensured.
Description of choice:
NOTE
For VLT 5001-5006, 200-240 V, VLT
5001-5011, 380-500 V, and VLT 5011,
550-600 V, it is only possible to choose
torque characteristics from [1] to [8].
If a high torque characteristic [1]-[5] is selected, the
adjustable frequency drive is able to provide 160% tor-
que. If a normal torque characteristic [11]-[15] is se-
lected, the adjustable frequency drive is able to
provide 110% torque. The normal mode is used for
oversize motors.
Please note that the torque can be limited in parameter
221.
If Constant torque is selected, a load-dependent U/f
characteristic is obtained in which the output voltage
is increased in the case of an increasing load (current)
so as to maintain constant magnetization of the motor.
Select Variable torque low, Variable torque medium or
Variable torque high if the load is variable (centrifugal
pumps, fans).
Select
High-variable torque with low [6], medium [7] or
high [8] starting torque if a higher breakaway torque is
required other than that obtainable with the three first-
mentioned characteristics, see fig. below.
Choose the torque characteristics giving the most re-
liable operation, the lowest possible energy consump-
tion and the lowest acoustic noise.
Select
Special motor characteristics if a special U/f set-
ting is required to match the motor in question. Set the
break points in parameters 422-432.
NOTE
Slip compensation is not active if a varia-
ble torque or special motor characteristics
are used.
102 Motor power (MOTOR POWER)
Value:
0.18 kW (0.18 KW) [18]
0.25 kW (0.25 KW) [25]
0.37 kW (0.37 KW) [37]
0.55 kW (0.55 KW) [55]
0.75 kW (0.75 KW) [75]
1.1 kW (1.10 KW) [110]
1.5 kW (1.50 KW) [150]
2.2 kW (2.20 KW) [220]
3 kW (3.00 KW) [300]
4 kW (4.00 KW) [400]
5.5 kW (5.50 KW) [550]
7.5 kW (7.50 KW) [750]
11 kW (11.00 KW) [1100]
15 kW (15.00 KW) [1500]
18.5 kW (18.50 KW) [1850]
22 kW (22.00 KW) [2200]
30 kW (30.00 KW) [3000]
VLT
®
5000 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
88 MG.51.C5.22 - VLT
p
is a registered Danfoss trademark.