Siemens SIMATIC EM 148-FC, Руководство пользователя

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Wiring
2-2
EM 148-FC Frequency Converter
A5E00065321-03
2.1 Wiring rules
!
Warning
This device generates dangerous electrical voltages and controls dangerous
rotating mechanical parts. Correct handling, installation, operation and
maintenance of the device are vital to ensure effective and safe operation.
For safety reasons you must connect all screw-type connectors with the ground
symbol to protective ground.
The Frequency Converter internally works with voltages of up to 800 V and
may still be live for a short period even after the power supply has been
switched off.
The Frequency Converter can in certain circumstances be connected to the
power supply via a residual current-operated circuit breaker
(see DIN VDE 0160).
Pins in the power connectors can carry dangerous voltages even when the
motor is at a standstill.
The Frequency Converter ensures internal motor overload protection that
complies with UL508C, Section 42. Alternatively, you can use an external
thermistor.
The Frequency Converter must not be used as an emergency stop mechanism
(see EN 60204, 9.2.5.4).
The EM 148-FC must not be used in systems where safety is an issue
(e.g. passenger transport).
There must be a break of at least a minute between the repeated,
simultaneous connection of the supply voltage and the motor (e.g. after the
residual current-operated circuit breaker has switched off).
The motor connector must not be removed during operation.
You must find out whether or not a residual current-operated circuit breaker
must be used depending on the type of network/relevant standards. If a
residual current-operated circuit breaker is required, the following conditions
apply:
– A residual current-operated circuit breaker of type B must be used.
– The fault current of the residual current-operated circuit breaker must be
300 mA.
– The neutral conductor of the supply system must be grounded.
– Only an EM 148-FC can be connected to a residual current-operated circuit
breaker.
Ensure that contactors in the system are interference-suppressed by RC
circuits (AC voltage contactors) or flywheeling diodes (DC voltage contactors).
Ensure that the interference-suppression elements are connected directly to
the contactor coils.
If a brake is used, ensure there is no interference (by using flywheeling diodes,
for example).
Note on CSA approval: The EM 148-FC is suitable for use in circuits that
provide a symmetrical current of up to 5000 A (eff) at a maximum voltage of
480 VAC.