Page 6.1 - 4 COMBIVERT R6-N © KEB, 2015-07
General designs
Control cabinet surface
Calculationofcontrolcabinetsurface: Airowratewithfancooling:
P
V
————
∆T • K
3,1 • P
V
————
∆T
A= [m
2
] V = [m
3
/h]
A = Control cabinet surface [m
2
]
∆T = temperature differential
(standard value = 20K)
[K]
K = coefcientofheattransmission
(standard value = 5)
P
V
= power loss (see technical data)
V = airowrateoffan
For more details please refer to the catalogs of the control cabinet manufacturers.
Installation instructions
•
Stationarily install and earth COMBIVERT.
•
The device must not be permeated by mist or water.
•
Allowforsufcientheatdissipationifinstalledinadust-proofhousing.
•
Install the COMBIVERT in an appropriate housing in accordance with the local regulations
when operating it in explosion-endangered spaces.
•
Protect COMBIVERT against conductive and aggressive gases and liquids.
•
The lines of the R6-N commutation reactor must be limiting to 1 m.
•
The frequency inverters must be placed in the immediate environment of the R6-N.
6.1.2 Dimensioning power supply and regenerative units
The COMBIVERT R6 serves in the operating mode as power supply and regenerative unit for supply of a DC
bus with the connected components (inverters). Furthermore the regenerative energy supplied into the DC bus
is refeed into the net via COMBIVERT R6.
A‚sinusoidal‘supplyandregenerativecurrentestablishesinconnectionwithaharmoniclter.
In operational case ‚feed-in‘ approx. 8% THD.
In operational case ‚regeneration‘ approx.8% THD.
Several R6 units can be switched parallelly to increase the supply and regenerative power.
The following basic requirements must be met for the operation as power supply and regenerative unit (stand-
ardoperatingmode):
- The sum of the DC link capacities of the connected inverters may not exceed the max. permissible DC link
capacity of the R6 units.
- ThemaximummotorDCloadcurrentoftheconnecteddrivemustbe≤thanthemaximumDCsupply
current of the R6 unit.
- ThemotorDCloadcurrentincontinuousoperationmustbe≤thantheDCsupplyratedcurrent.
Observe OL function at high load currents.
- ThemaximumregenerativeDCloadcurrentoftheconnecteddrivemustbe≤thanthemax.DCregener-
ative current.
-
TheregenerativeDCloadcurrentincontinuousoperationmustbe≤thantheDCregenerativeratedcurrent.
Observe OL function at high load currents.
-
The maximum permissible DC link capacity can be taken from the power data of the respective regenerative units!
∑CZK capacitors≤max.permissibleDClinkcapacity
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