Resistor Installation And Wiring - ABB ACS800-01 Hardware Manual

124
Combined braking cycles for R7:
Examples
P
br
P or P
br5 br10
P
br30
P
brcont
No braking
• After P , P or P braking, the drive and the chopper will withstand P
br5 br10 br30
• P , P or P braking is allowed once every minute.
br5 br10 br30
• After P braking, there has to be at least 30 seconds without any braking if the subsequent braking power 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 braking, the drive and the chopper will withstand P
br5 br10 br30
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 at least 60 seconds without any braking if the subsequent braking power is greater than P
brcont
All braking resistors must be installed outside the converter module. The resistors are built in an IP 00 metal frame. The 2xSAFUR and
4xSAFUR resistors are connected in parallel. Note: The SAFUR resistors are not UL listed.

Resistor installation and wiring

All resistors must be installed outside the drive module in a place where they will
cool.
WARNING! The materials near the brake resistor must be non-flammable. The
surface temperature of the resistor is high. Air flowing from the resistor is of
hundreds of degrees Celsius. Protect the resistor against contact.
Use the cable type used for drive input cabling (refer to chapter Technical Data) to
ensure the input fuses will also protect the resistor cable. Alternatively, two-
conductor shielded cable with the same cross-sectional area can be used. The
maximum length of the resistor cable(s) is 10 m (33 ft). For the connections, see the
power connection diagram of the drive.
Resistor braking
max 5 s or 10 s
min. 30 s max 30 s min. 30 s
braking.
br5
max 5 s, 10 s or 30 s
br
min. 60 s
max 30 s
min. 30 s
continuously.
brcont
within a total braking time of 30 seconds.
br30
continuously. (P
brcont
min. 60 s
is the only allowed braking power
brcont
t
.
brcont
t
.
brcont