Toshiba 18 - 1250 A Instruction Manual page 9

TE Series
Thermal Model Electronic
Overload Protection
Two Stage
Overload Curves
Overload Reset
Retentive Thermal Memory
Dynamic Reset Capacity
Current Imbalance Trip
PTC Input Trip
Over Current Trip
(Electronic Shear Pin)
Phase Loss
Equipment Ground Fault
Protection
Load Loss Trip
Coast Down (Back Spin)
Lockout Timer
Starts-per-hour Lockout
Minimum Time between
Starts Lockout
Restart Delay
Auto Reset
Power Device Monitoring
Digital Solid State Soft Starters 18 – 1250A
1.1.2 Advanced Motor Protection Features
A sophisticated Thermal Model of the motor operation is created in the
microprocessor to accurately track all starting, stopping and running conditions
to provide maximum motor protection.
Starting: Programmable for Class 5 or 10
Run: Programmable for Class 5 through 30 when "At-Speed" is detected.
Manual (default) or automatic
Overload circuit retains thermal condition of the motor regardless of control
power status. Unit uses real time clock to adjust for off time.
Overload will not reset until thermal capacity available in the motor is enough for
a successful restart. Starter learns and retains this information by monitoring
previous successful starts.
Trip Level: 5 - 30% Imbalance in any two phases
Trip Delay: 1 -20 seconds
Trips on greater than 750 ohms resistance on a dedicated PTC input. Can be
used with an Emergency Stop or any other External Lockout.
Trip Level: 50 - 300% of motor FLA
Trip Delay: 1 - 20 seconds
Trips on any phase current less than 20% of unit rating.
Can be disabled in programming for testing with smaller loads.
Type: Residual Current Trip
Range: 5 – 90% of unit CT ratio
Trip Delay: 1 – 60 seconds
Under Current Trip Level: 10 –90 % of motor FLA
Trip Delay: 1 – 60 seconds
Prevents restart when motor may be spinning backwards
Coast Down Time Range: 1 – 60 minutes
1 – 10 successful starts per hour
Range: 1 – 60 minutes between start attempts
Sequential Start Feature for restarting delay after a power outage.
1-999 seconds after a power loss
Can be programmed to attempt resetting after selected faults
0 – 10 Attempts, 0 – 999 minutes delay between attempts
Shorted SCR Lockout (1 shorted SCR) and independent Shunt Trip (multiple
shorted SCRs). Can be disabled in programming.
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