Toshiba 18 - 1250 A User Manual
Page 59
TE Series
Digital Solid State Soft Starters 18 – 1250A
52
Shunt Trip:
Shunt Trip is a feature that will cause an immediate Trip if the TE Series
detects current flowing through any phase (or all) when it is supposed to
be off. The trip function is typically associated with Aux. Relay setting 7
(see F060-63), wired to a Shunt Trip coil in an upstream circuit breaker
or an in-line contactor. This is so that power flow to the motor windings
can be interrupted to prevent damage. The usual cause is multiple
shorted SCRs or a welded Bypass Contactor. The only time this should
be turned off is for troubleshooting by Service personnel.
Shunt Trip Numeric Value = 16
If this feature is On (default setting) and you want to turn it Off,
Subtract 16 from F051
If this feature is Off and you want to turn it On, add 16 to F051
PTC Trip:
This feature controls the inclusion of the PTC Input (see Section 4.2.7).
When ON (default setting), a jumper wire or other circuit must be
installed on the PTC input if a PTC resistor is not included in the motor.
Turn this feature to OFF for troubleshooting or if you do not want to
worry about the jumper wire.
PTC Trip Numeric Value = 32
If this feature is On (default setting) and you want to turn it Off,
Subtract 32 from F051
If this feature is Off and you want to turn it On, add 32 to F051
Line Phase Loss (Stopped) Trip:
This feature will prevent the TE Series starter from attempting to start if
voltage in one (or more) of the incoming lines is not present. This can
be used to detect a blown fuse or power supply loss (as long as control
power is still available). It differs from the Phase Loss (Running) Trip
above in that it is based upon line voltage so does not require that a
Start Command be given. This trip function resets itself after
determining that all 3 phases have voltage applied. The voltage level at
which this feature activates is fixed at approximately 100VAC, but is not
adjustable and should not be used as Under Voltage protection.
Line Phase Loss (Stopped) Trip Numeric Value = 64
If this feature is On (default setting) and you want to turn it Off,
Subtract 64 from F051
If this feature is Off and you want to turn it On, add 64 to F051
NOTE:
1) When using an In-Line Isolation Contactor, it may be necessary
to defeat this protection (by subtracting a numeric value of 64 from
F051) in order to avoid nuisance tripping whenever the In-Line
Contactor opens.
2) This protection will automatically reset itself when line voltage is
present on all 3 phases. When using 3-wire control the TE Series
will not attempt restarting unless the Start Command is reinitiated.
CAUTION
When using 2-wire control, the starter will restart when this
feature resets itself after all 3 phases are present.