Common Output Terminal (Option +H366); Additional Terminal Block X504 (Option +L504); Thermal Protection With Ptc Relays; L537) - ABB ACS880-37 Hardware Manual

50 Operation principle and hardware description
Note that this option is not available with option +E206 (sine filters) – in this case, the
motor cables are connected to the sine filter cubicle.

Common output terminal (option +H366)


As standard, each inverter module must be individually cabled to the motor. This option
adds bridging that connects the outputs of multiple (in practice, two or three) inverter
modules mounted in the same cubicle. The bridging balances the motor current between
the modules, which allows more cabling options. For example, it is possible to use a
number of cables that could not otherwise be evenly distributed between the inverter
modules.
WARNING! The bridging can carry the nominal output of one inverter module. In
case of three parallel modules, ensure that the load capacity of the bridging is not
exceeded. For example, if the cabling connects to the output busbars at one
module only, use the module in the middle.
Note: The +H366 option only interconnects the outputs of inverter modules within the
same cubicle, not modules installed in different cubicles. Therefore, when the drive has
more than three inverter modules, make sure that the load is distributed evenly between
the modules:
•
In case of two inverter cubicles of two modules, connect the same number of
cables to each cubicle.
•
In case of one inverter cubicle with three modules and another with two, each
cubicle requires a number of cables proportional to the number of modules within.
For example, connect three out of five (or six out of ten, etc.) cables to the cubicle
with three modules, the remaining two out of five (four out of ten) cables to the
cubicle with two modules.

Additional terminal block X504 (option +L504)


The standard terminal blocks of the drive control unit are wired to the additional terminal
block at the factory for customer control wiring. The terminals are spring loaded.
Cables accepted by the terminals:
•
solid wire 0.08 to 4 mm
•
stranded wire with ferrule 0.14 to 2.5 mm
•
stranded wire without ferrule 0.08 to 2.5 mm
Stripping length: 10 mm (0.4").
Note: The optional modules inserted in the slots of the control unit (or optional FEA-03
extension adapter) are not wired to the additional terminal block. The customer must
connect the optional module control wires directly to the modules.
Thermal protection with PTC relays (options +L505, +2L505, +L513,

+2L513, +L536, +L537)
PTC thermistor relay options are used for overtemperature supervision of motors
equipped with PTC sensors. When the motor temperature rises to the thermistor wake-up
level, the resistance of the sensor increases sharply. The relay detects the change and
indicates motor overtemperature through its contacts.
2
2
2
(28 to 12 AWG).