Active Shunt Considerations - Allen-Bradley Kinetix 5700 User Manual

Chapter 2 Plan the Kinetix 5700 Drive System Installation
Kinetix 5700 Power Supply
2198-Pxxx DC-bus power supply or
2198-RPxxx regenerative bus supply
when DC-bus regulation is not enabled.
2198-RPxxx regenerative bus supply
when DC-bus regulation is enabled.
(1) How the Powerohm PKBxxx shunts connect to the 2198-Pxxx DC-bus power supply and 2198-RPxxx regenerative bus supply is explained in
illustrated with interconnect diagrams in
52

Active Shunt Considerations

External active shunts are required in the following use cases:
• The 2198-RPxxx regenerative bus supply provides DC-bus power while
DC-bus regulation is not enabled.
• One permanent magnet motor runs above its bus overvoltage speed. See
Field Weakening Mode
• One permanent magnet motor drives a vertical load that could make the
motor accelerate above the bus overvoltage speed during a fault
condition.
• Any condition where total shared DC-bus regenerative power is greater
than the 2198-RPxxx regenerative bus supply capacity. For example,
consider a peak-power stopping condition.
• The 2198-RPxxx regenerative bus supply is operating with DC-bus
regulation enabled and the regenerative bus supply loses three-phase AC
input power, 24V DC input power, or has a fault condition.
Active shunts are available from the Rockwell Automation Encompass™ partner
Powerohm Resistors, Inc. See
information on Powerohm active shunts.
IMPORTANT Powerohm Bulletin PKBxxx active shunt modules use built-in internal brake
Table 16 - Compatible Active Shunt Specifications (internal brake resistor)
Powerohm
Input Voltage,
Resistors
nom
(1)
Cat. No.
PKB005
PKB010
PKB050
480V AC
PKB005-800
PKB010-800
PKB050-800
Active Shunt Wiring Examples on page 360.
Rockwell Automation Publication 2198-UM002G-EN-P - February 2019
on page 446
ATTENTION: To avoid damage to the Kinetix 5700 drive system, wire the
active shunt thermal switch to a digital input on the power supply and
configure the Shunt Thermal Switch OK function in the Logix Designer
application.
ATTENTION: DC-bus failure can cause damage to all drive modules in the
bus group, not just the inverter connected to the motor.
http://www.powerohm.com
resistors. Bulletin PWBxxx active shunt modules require appropriately sized
external brake resistors.
Continuous Resistance
Turn -on
Power (internal)
Bus Voltage
kW Ω
1.50 108
750V DC 2.06 52.7
7.00 10.5
1.50 108
800V DC 2.06 52.7
7.00 10.5
for a description of this feature.
for more
Resistance Continuous Peak
(minimum) Current Current
Ω Amps Amps
– 2.00 6.9
– 2.75 14.2
– 9.30 71.4
– 1.88 7.4
– 2.58 15.2
– 8.72 76.2
External Active-shunt Connections on page 183 and