Danfoss iSave 21 User Manual page 74

Instruction
iSave 21
2
iSave 21
Protection by VFD.
The Danfoss VLT 302 series can provide the speed control and overall protection of both the electric
motor and the mechanical parts in the iSave. For full protection on both the iSave and the electrical
motor, one VLT must bee used for each iSave. See Electrical schematic diagram on page 3.
Alternative one VLT can control the speed of several iSaves. But the overload protection of the electri-
cal motors and torque limitations on the iSaves must be provided by additional equipment. This can
be done by a mechanical coupling between the electrical motor and the iSave (See page 7) or by a
"current monitoring relays", see page 4.
Danfoss VLT 302 parameter setup
For detailed information of the VLT see the operation instruction supplied together with the VLT.
At initial start up of the VLT run the "initialisering"
Parterre settings:
Par. No. # Parameter description
341 Ramp up
416 Current limit control, proportional gain
1425 Current limit control, time
1) Current limit must be calculated according to maximum torque of the iSave.
See datasheet 521b1116.
180R9222 / 521B1175 / DKCFN.PI.003.L1.02 / 04.2011
Set value
10 second
1)
0 second