Siemens SIMATIC EM 300, Руководство пользователя

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Commissioning
SIMATIC - EM 300 Motor Starters
3-2
GWA-4NEB 640070302-05
3.1 Motor Starters EM 300 DS and EM 300 RS
3.1.1 Commissioning
Set current I
e
Before you commission the motor starter, you must set the current I
e
for trip-
ping the overload release.
External short-circuit protection
If the short-circuit current at the point at which the motor starter is installed is
greater than the rated ultimate short-circuit breaking capacity of the circuit-
breaker (see table), you must provide external short-circuit protection (fuse or
circuit-breaker; see Catalog).
Overload release test
You can test the overload release function.
Reversing starter EM 300 RS
When switching over from right to left or back again, a stop interval of more
than 200 milliseconds must be observed. This interval has to be set via the user
program.
Step Procedure
1 Open the transparent cover in the top section of the motor starter.
2 Set the current I
e
on the circuit-breaker scale with a screw-driver
(see figure on page 1-2).
U
e
I
cu max
400 V AC 50 kA
440 V AC 10 kA
500 V AC 3 kA
Step Procedure
1 Open the transparent cover in the top section of the motor starter.
2 Reset the toggle switch from 0 to 1.
3 Insert a screwdriver in the test opening (see figure on page 1-2) and
press it over to the left.
The overload release function is working if the toggle switch is switched
back from 1 to 0.