Siemens SINAMICS G180, Инструкция по установке и эксплуатации

Страница: 83 / 218

Preparations for use
4.4 Realizing operation in the explosion-protected zone
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007
81
● Do not exceed the maximum motor cable length, otherwise impermissible voltage
increases can occur. For more detailed information, refer to the section titled "Motor
connection" (Page 98).
● Ensure that Ex e-motors are tested for increased safety together with the converter at the
manufacturer's factory. The system must not be operated without the test report.
● In the case of Ex e and Ex n motors, set the values for "I contin.", "I short" and "t short" to
the values stated by the manufacturer. Do not change these values again without
consulting the motor manufacturer.
● Protect converter-fed motors in the hazardous zones using PTC thermistors. An
evaluation circuit for the motor PTC thermistor is integrated in the "peripheral board 2 / 4"
option for this. More detailed information can be found in the section "Peripheral boards 1
to 4" (Page 37). The converter is electronically shutdown.
Safety during shutdown
The risk analysis according to EN 1050 or DIN EN ISO 14121 (draft standard) showed that in
comparison to the shutdown using contactors, only the additional hazard due to dangerous
shock currents occurred in the converter.
Due to the redundant design of the electronic shutdown route, it is achieved that the
shutdown is still ensured even if a fault in the electronic shutdown route itself occurs.
As components proven in operation are used, the converter is in compliance with
EN ISO 13849-1:2008, Category two.
● If you do not use this electronic shutdown, the motor PTC thermistors must be routed via
ATEX-certified thermistor evaluation units, e.g. CALOMAT® CK140 … CK145.
● If you use CALOMAT® devices, you must use a line contactor on the input side.
–
In this case, loop the contact of the CALOMAT® directly into the coil circuit of the line
contactor.
● Otherwise, perform the wiring of the line contactor according to the description of the
main contactor function in section "Contactor functions" (Page 156).