ABB ACS800-U7 Hardware Manual page 144

144
Combined braking cycles for R7:
Examples
P
br
P or P
br5 br10
P
br30
P
brcont
No braking
• After P , P or P
br5 br10 br30
• P , P or P braking is allowed once every minute.
br5 br10 br30
• After P braking, there has to be a pause of at least 30 seconds without any braking if the subsequent braking power
brcont
is greater than P .
brcont
• After P or P braking, the drive and the chopper will withstand P
br5 br10
• P braking is not acceptable after P
br10
Combined braking cycles for R8:
Examples
P
P , P or P
br5 br10 br30
P
brcont
No braking
• After P , P or P
br5 br10 br30
allowed braking power after P
• P , P or P braking is allowed once every minute.
br5 br10 br30
• After P braking, there has to be a pause of at least 60 seconds without any braking if the subsequent braking power
brcont
is greater than P .
brcont
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.
Resistor braking
max 5 s or 10 s
min. 30 s max 30 s min. 30 s
braking, the drive and the chopper will withstand P
braking.
br5
max 5 s, 10 s or 30 s
br
min. 60 s
braking, the drive and the chopper will withstand P
, P or P .)
br5 br10 br30
max 30 s
min. 30 s
brcont
within a total braking time of 30 seconds.
br30
brcont
continuously.
min. 60 s
continuously. (P is the only
brcont
t
t