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VLT
®
5000 Series
NB!:
The power dissipation during quick discharge
does not form part of the power monitoring
function, parameter 403. When sizing resistors, this
fact should be taken into consideration.
175ZA447.10
Quick discharge
activated
Check 24 Volts
external DC supply
TRIP (RESET)
Q.DISCHARGING FAILED
No 24 Volts external
DC supply
Q.DISCHARGING FAILED
Timeout
Parameter 408 = [1]
Discharge
Discharge completed
POWER IS DISCHARGED
TRIP (RESET)
ALARM:33
ALARM:33
24 Volts external
DC supply OK
Start
Quick discharge
■
Mains failure/quick discharge with mains failure
inverse
The first column in the table shows
Mains failure
,
which is selected in parameter 407. If no function is
selected, the mains failure procedure will not be car-
ried out. If
Controlled ramp-down
[1] is selected, the
VLT frequency converter will take the motor down to
0 Hz. If
Enable
[1] has been selected in parameter
408, a quick discharge of the intermediate circuit
voltage will be carried out after the motor has
stopped.
Using a digital input, it is possible to activate mains
failure and/or quick discharge. This is done by se-
lecting
Mains failure inverse
on one of the control
terminals (16, 17, 29, 32, 33).
Mains failure inverse
is active in the logical ’0’ situation.
NB!:
The VLT frequency converter can be
completely damaged if the Quick-discharge
function is repeated, using the digital input while
mains voltage is on.
MG.51.A1.02 - VLT is a registered Danfoss trade mark
100
Summary of Contents for ARIETE
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Page 390: ...VLT 5000 Series MG 51 A1 02 VLT is a registered Danfoss trade mark 56 ...
Page 429: ...VLT 5000 Series MG 51 A1 02 VLT is a registered Danfoss trade mark 95 Special functions ...
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