ABB ACS800-04M - Page 135

Resistor braking 135
All brake resistors must be installed outside the drive 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 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 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 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.
No braking
Examples
min.
max 5 s, 10 s or 30 s