ABB ACS880-37LC-0390A-7, Руководство по оборудованию, Страница: 43 / 242

+L536, +L537
An alternative to a thermistor relay option is the FPTC-01 (L536) or FPTC-02 (option
+L537, also requires Q971) thermistor protection module. The module mounts onto
the inverter control unit, and has reinforced insulation to keep the control unit
PELV-compatible. The connectivity of the FPTC-01 and the FPTC-02 is the same, but the
FPTC-02 is Type Examined as a protective device within the scope of the European ATEX
(and UKEX) Product Directive.
For protection purposes, the FPTC has a "fault" input for the PTC sensor. An overtemperature
situation executes the SIL/PL-capable SMT (Safe motor temperature) safety function by
activating the Safe torque off function of the drive.
The FPTC also has a "warning" input for the sensor. When the module detects
overtemperature through this input, it sends a warning indication to the drive.
For more information and wiring examples, see the module manuals and the circuit diagrams
delivered with the drive.
See also
• firmware manual for parameter settings
• FPTC-01 thermistor protection module (L536) for ACS880 drives user's manual
(3AXD50000027750 [English])
• FPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (L537+Q971)
for ACS880 drives user's manual (3AXD50000027782 [English])
• circuit diagrams delivered with the drive for the actual wiring.
￭
Thermal protection with Pt100 relays (onL506, +nL514)
Pt100 temperature monitoring relays are used for overtemperature supervision of motors
equipped with Pt100 sensors. For example, there can be three sensors to measure the
temperature of the motor windings and two sensors for the bearings. As the temperature
rises, the sensor resistance increases linearly. At an adjustable wake-up level, the monitoring
relay de-energizes its output.
The standard Pt100 relay options include three (+3L506), five (+5L506) or eight (+8L506)
relays.
By default, the relays are wired internally to digital input DI6 of the drive control unit. The
loss of the input is set to trigger an external fault. The options include a terminal block for
sensor connection. The output indication on the terminal block can be wired by the customer,
for example, to an external monitoring circuit. See the circuit diagrams delivered with the
drive.
O3L514 (3 relays), +5L514 (5 relays) and +8L514 (8 relays) are ATEX-certified
thermal protection functions that have the same external connectivity as +nL506. In addition,
each monitoring relay has a 0/4…20 mA output that is available on the terminal block. Option
+nL514 comes with +Q971 (ATEX-certified safe disconnection function) as standard and
is wired at the factory to activate the Safe torque off function of the drive in an
overtemperature situation. As the monitoring relay does not have a reset functionality, the
manual reset required by Ex/ATEX regulations must be implemented using drive parameters.
For more information, see
ATEX-certified motor thermal protection functions for cabinet-built
ACS880 drives (oL513+Q971 and +L514+Q971) user's manual (3AXD50000014979
[English])
.
See also
Operation principle and hardware description 43