4.11 Machines without final paint coating
For machines, which are only delivered with primer, you must paint them to comply with the
applicable guidelines for the specific application. The primer alone does not provide adequate
corrosion protection.
The paint applied must conform to the requirements to avoid electrostatic charging, see
EN 60079-0.
Please contact the Service Center for recommendations relating to the paint finish.
4.12 Thermal protection
The machine is optionally equipped with temperature sensors, e.g. Pt100, PTC thermistor, ....
Thermal motor protection by directly monitoring the winding temperature is permissible if this
is certified and test data specified on the rating plate. Temperature sensors for directly
monitoring the temperature guarantee explosion protection in conjunction with function tested
tripping devices with type of protection marking II (2) G.
● Direct temperature monitoring for line (DOL) operation: Motors operating with duty type S1
either require a circuit breaker or the temperature must be directly monitored (temperature
sensor and associated tripping device). Evaluate the temperature sensors.
● Direct temperature monitoring for inverter operation: The temperature must be directly
monitored (temperature sensor and associated tripping device). Evaluate the temperature
sensors.
● If you have to perform a continuity test of the temperature sensors, do not apply a voltage
>2.5 V. If no test data is specified on the rating plate, this means that the winding protection
is only intended as an additional protection.
● For pole-changing motors, use a direct temperature monitoring sensor as stated on the
rating plate, e.g. PTC thermistor according to DIN 44081/44082, for each speed level in
addition to the separate, mutually interlocked motor protection relays.
Every machine must be protected against an inadmissible temperature rise. Observe the
following:
● Protect every machine according to IEC/EN 60079–14 using a current-dependent, delayed
circuit breaker with phase failure protection according to IEC/EN 60947 or a similar device
in all phases.
● Set the protective device (e.g. circuit breaker) to the rated current. The value is stamped
on the rating plate.
● For windings in a delta connection, protect the winding in such a way that the tripping device
or relay is connected in series with the winding phases. When selecting and setting the
tripping unit, define the rated value of the phase current. The phase current is 0.58 times
the rated machine current. Any thermal machine protection via direct temperature
monitoring to be used in addition to the machine circuit breaker is specified on the rating
plate if required.
Preparations for use
4.11 Machines without final paint coating
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
26 Operating Instructions 06/2018
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