Before servicing the installation (adjusta-
ble frequency drive + motor), it must be
checked that the intermediate circuit volt-
age is below 60 V DC. This is done by
measuring terminals 88 and 89, load-
sharing.
NOTE
The power dissipation during quick dis-
charge 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 carried out. If
Controlled ramp-down
[1] is selected, the frequency
converter will take the motor down to 0 Hz. If
Enable
[1] has been selected in parameter 408, a quick dis-
charge of the intermediate circuit voltage will be car-
ried 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 select-
ing
Mains failure inverse
on one of the control terminals
(16, 17, 29, 32, 33).
Mains failure inverse
is active in the
logical '0' situation.
NOTE
The frequency converter can be com-
pletely damaged if the Quick-discharge
function is repeated, using the digital input
while mains voltage is on.
Mains failure par.
407
Quick discharge par. 408
Mains failure inverse digital in-
put
Function
No function [0]
Disable [0]
Logical '0'
1
No function [0]
Disable [0]
Logical '1'
2
No function [0]
Enable [1]
Logical '0'
3
No function [0]
Enable [1]
Logical '1'
4
[1]-[4]
Disable [0]
Logical '0'
5
[1]-[4]
Disable [0]
Logical '1'
6
[1]-[4]
Enable [1]
Logical '0'
7
[1]-[4]
Enable [1]
Logical '1'
8
Function no. 1
Mains failure and quick discharge are not active.
Function no. 2
Mains failure and quick discharge are not active.
Function no. 3
The digital input activates the quick discharge function,
regardless of the intermediate circuit voltage level and
regardless of whether the motor is running.
VLT
®
5000 Series
MG.51.C5.22 - VLT
p
is a registered Danfoss trademark.
203
List of functions
Содержание VLT 5000 Series
Страница 2: ...VLT 5000 Instruction Manual ...
Страница 3: ......
Страница 45: ...Mechanical dimensions cont VLT 5000 Series 42 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Страница 185: ...VLT 5000 Series 182 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Страница 186: ...VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 183 EC EMC ...
Страница 196: ...RELATIVE VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 193 List of functions ...
Страница 197: ...EXTERNAL PRESET VLT 5000 Series 194 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Страница 198: ...References VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 195 List of functions ...
Страница 202: ...VLT 5000 Series MG 51 C5 22 VLT p is a registered Danfoss trademark 199 List of functions ...
Страница 217: ...VLT 5000 Series 214 MG 51 C5 22 VLT p is a registered Danfoss trademark ...
Страница 238: ...Rev 2006 12 12 www danfoss com drives 175R5271 MG51C522 MG51C522 MG51C522 VLT 5000 Instruction Manual ...
Страница 239: ......