Siemens SIMOCODE pro C, System Manual

Page: 309 / 408

Safety and commissioning information for Ex areas
14.1 Motor protection functions (overload protection, thermistor protection)
SIMOCODE pro
System Manual, 05/2019, A5E40507475002A/RS-AD/004
309
14.1.3.5 Short-circuit protection for type of coordination 2 according to IEC 60947-4-1
Short-circuit protection must be carried out by separately arranged overcurrent protection
devices.
NOTICE
Fuse protection of the contactor for type of coordination 2
When combining with other contactors, observe the respective maximum fuse protection of
the contactor for type of coordination 2.
14.1.3.6 Cable protection
NOTICE
Cable cross sections
Avoid impermissibly high cable surface temperatures by correctly dimensioning the cross
sections!
Choose a sufficient cable cross section, especially for heavy-starting motors CLASS 20 to
CLASS 40 (see Chapter Short-circuit protection with fuses for motor feeders for short-circuit
currents up to 100 kA and 690 V for 1st generation current / voltage measuring module
(Page 364))!
14.1.3.7 Test
Testing - general information
SIMOCODE pro offers users a convenient method of checking the complete motor protection
chain (incl. actuators and sensors such as contactors, circuit breakers, thermistors). This can
be used, for example, for testing according to IEC 60079-17 or VDE 0118 The test
encompasses a full function test. For this purpose, all three test phases are to be carried out
(hardware test, current feedback, motor protection tripping, see below). The test can be
carried out using the "TEST / RESET" buttons provided, or automatically via the bus.
Tripping currents do not need to be injected in order to carry out testing.