ABB ACS800-U7 - Combined braking cycles for R7; Combined braking cycles for R8

Resistor braking
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All brake resistors must be installed outside the converter module. The resistors are built in an IP00 metal frame. The
2xSAFUR and 4xSAFUR resistors are connected in parallel. Note: The SAFUR resistors are not UL listed.
Combined braking cycles for R7:
•After P
br5
, P
br10
or P
br30
braking, the drive and the chopper will withstand P
brcont
continuously.
• P
br5
, P
br10
or P
br30
braking is allowed once every minute.
•After P
brcont
braking, there has to be a pause of at least 30 seconds without any braking if the subsequent braking power
is greater than P
brcont
.
•After P
br5
or P
br10
braking, the drive and the chopper will withstand P
br30
within a total braking time of 30 seconds.
• P
br10
braking is not acceptable after P
br5
braking.
Combined braking cycles for R8:
•After P
br5
, P
br10
or P
br30
braking, the drive and the chopper will withstand P
brcont
continuously. (P
brcont
is the only
allowed braking power after P
br5
, P
br10
or P
br30
.)
• P
br5
, P
br10
or P
br30
braking is allowed once every minute.
•After P
brcont
braking, there has to be a pause of at least 60 seconds without any braking if the subsequent braking power
is greater than P
brcont
.
P
br
t
P
br5
or P
br10
P
br30
P
brcont
min. 30 s max 30 s min. 30 s
No braking
Examples
min. 30 s
max 5 s or 10 s
max 30 s
P
br
t
P
br5
, P
br10
or P
br30
P
brcont
min. 60 s
No braking
Examples
min. 60 s
max 5 s, 10 s or 30 s