REXROTH IndraDrive - Page 76

Description Symbol Unit Value of the respective component
Maximum allowed mains frequency change Δ f
LN
/t
Hz/s
2% × f
LN
Maximum allowed voltage unbalance according
to IEC 61000-2-4, class 3
3%
Maximum allowed voltage dips on the mains
voltage according to IEC 60146-1-1 – class 3
40% of the mains amplitude;
Voltage dip mustn't exceed 250% × degrees
(see diagram " Maximum Allowed Voltage Dips
in % of the Mains Voltage, page 74")
Maximum allowed THD according to IEC
61000-2-4, class 3
10%
Short-time interruptions n.s., see section " Note on Project Planning
Short-Time Interruptions, page 74"
1) Explanations: See chapter 7.3 "Mains Types" on page 76
Tab.7-1: Standard Range of Power Voltage
Allowed Voltage Dip
The curves in the figure show the relation between duration and allowed rela‐
tive value of voltage dips with mains frequencies of 50 Hz and 60 Hz.
dt Duration of voltage dip
dU/U
LN
Relative voltage dip
f
LN
Mains frequency
U
LN
Mains voltage
Fig.7-1: Maximum Allowed Voltage Dips in % of the Mains Voltage
How to read the example:
Mains frequency f
LN
= 50 Hz and duration of voltage dip dt = 0.5 ms
⇒ Maximum allowed voltage dip: 28% of applied mains voltage U
LN
Note on Project Planning "Short-
Time Interruptions"
The drive system is used for energy conversion and a voltage dip is a loss of
available energy.
The effect of the voltage dip (energy reduction) on the process cannot be de‐
termined without detailed knowledge of the respective process. The effect is
a system and rating aspect and generally will be greatest when the power de‐
mand (including the losses) of the drive system is greater than the available
power.
Bosch Rexroth AG DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
74/309
Project Planning of Mains Connection