Operation Under Rated Conditions
In operation under rated conditions, the component is operated in individual
supply with the rated power P
DC_cont
.
For the data of mains contactor, fusing and the required connection cross
section in operation under rated conditions, see Project Planning Manual
"Rexroth IndraDrive Supply Units and Power Sections" → Chapter of the re‐
spective device → "Technical Data" → "Basic Data" → table "Data for Mains
Voltage Supply".
Operation at Partial Load
If several drive controllers are to be operated at partial load (power smaller
than rated power) at one mains circuit breaker and one mains contactor only,
add the mains-side phase currents and inrush currents calculated for the indi‐
vidual drives and therefor determine the mains circuit breaker.
Dimensioning the fuse for operation at partial load
The nominal current of the selected fuse before the drive system
mustn't be greater than the mains circuit breaker of the smallest
converter or supply unit.
Use more powerful converters or supply units in the drive system.
For dimensioning line cross sections and fuses, see also
15.3.5 "Dimensioning the Line Cross Sections and Fuses " on
.
Fusing Branches within the Con‐
trol Cabinet
In the wiring of the drive system devices, there are branches run from main
lines to short circuit protection devices.
In accordance with EN 60204-1:2005, 7.2.8, such supply lines to short circuit
protection devices branching off main lines do not need to be especially pro‐
tected against short circuit, when the following requirements have been fulfil‐
led:
●
The supply lines to the short circuit protection device have at least the
cross section of the conductors continuing the line from the short circuit
protection device (line cross sections from and to motor circuit breaker
have the same size).
●
No supply line to the short circuit protection device is longer than 3 m.
●
The lines are protected against external influence by a housing or a wir‐
ing duct.
●
The lines are not run close to combustible material.
15.3.5
Dimensioning the Line Cross Sections and Fuses
Dimensioning the line cross sections and fuses in the supply feeder
and branches to the drive system:
1. Determine current in supply feeder of drive system and correct it with
and
(In the technical data of the components in section "Data for Mains Volt‐
age Supply", you can find standardized data for connection cross sec‐
tion and mains circuit breaker at operation under rated conditions.)
2. Determine country of use ("international except for USA/Canada" or
"USA/Canada")
3. Determine installation type (e.g. B1 or B2)
4. In table row "Current I", select value immediately above the value deter‐
mined in the first step
5. In table row "Nominal current fuse", read corresponding fuse
Bosch Rexroth AG
DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
266/309
Calculations
