GE Industrial Solutions Record Plus FE250 with SMR1 Trip Unit - Manual (Page 3)

Step 4, Adjustments
SMR1 digital RMS trip unit: Features a fixed
instantaneous trip function and an adjustable trip
function Im, which can shorten the trip time to
approximately 100ms, for over current above 2x
to 13x. To set the Im value, using switch dial,
select a specific value of St. See figure 3. The St
set point value is a multiple of the installed rating
plug - rated current (Ir),
Im = St x Ir.
Step 5, Circuit breaker performance and
operation
The breaker contact status is indicated by the
handle position, and the positions are marked on
either side of the handle escutcheon, clearly
showing the status of the breaker contacts. ON
and/or I indicate breaker is ON and OFF and/or O
indicate breaker is OFF.
The breaker tripped position
is indicated by the symbol.
To close the breaker from the OFF position moves
the handle to the ON position. To close the
breaker from the trip position, first move the
handle fully to the OFF (reset) position then to the
ON position. See Figure 6.
A Push-To-Trip button is provided for convenience
of testing the mechanical trip operation of the
breaker.
The Push-To-Trip should be tested annually.
Caution: Automatic tripping of the circuit breaker
may indicate a system problem. Identify and
correct any problem before turning the device on
again.
Important: Le declenchement automatique de
disjoncteru, peut indiquer un probleme de circuit.
Identifiez et corrigez le probleme avant de
refermer l'appareil.
Terminal (IP20) covers,
Line and load
Figure 5, Setting adjustment, tamper resistant cover
and terminal (IP20) cover
Figure 6 - Mechanically
Operating Circuit breaker
Figure 3, SMR1 trip unit St (2x –13x), Im = St x Ir
St Dial