Fagor DDS Series Hardware Manual page 196

  Auxiliary modules
4.6 Bus protection module. BPM
4.
200
DDS
HARDWARE
Ref.1912
· 196 ·
Install in DDS systems having:
Synchronous spindle and only when required by the application.
Purpose. Protect the power semi-conductors (IGBTs) of the drive that
governs it, thus preventing damage to the unit due to a very high voltage that
may be generated at the power bus because the braking energy cannot be
returned when a voltage drop occurs.
and/or,
RPS power supply when only the controlled stop is to be ensured.
Purpose. To ensure a controlled stop of the motor due to mains failure
because the energy may be dissipated while braking at the external Ballast
resistors installed in the BPM module. Not installing this module will result in
an uncontrolled stop (by friction) in case of a voltage failure due to an over-
voltage error of the bus because there are no resistors to dissipate the
braking energy.
Outside look
F. H4/11
Bus Protection Module, BPM. Outside look.
Technical data
T. H4/13 Bus Protection Module, BPM. Technical data.
Bus Protection Module
Power voltage input
Control circuit voltage
Control circuit consumption
Protections
Ballast resistors
Maximum braking power
Filter capacity
Max. voltage at DR OK contact
Max. current at DR OK contact
Approx. mass kg/lb
Ambient temperature
Storage temperature
Maximum humidity
BPM
542-800 V DC
24 V DC (between 22-26 V DC)
0.1 A
Short-circuit, over-temperature
≥ 18 Ω. Up to three 18 Ω resistors
may be connected without power limit
100 kW
410 µF, 900 V DC
125 V AC, 150 V DC
1 A
3.6/7.9
0°C/45°C (32°F/113°F)
-25°C/60°C (-13°F/140°F)
< 90 % (non condensing at 45°C/113°F)