TOSHIBA- 1
TX Series 48 - 1250A
Chapter 1 - Introduction
This chapter is a brief introduction to the TX Series soft starter and describes
product operation and unit features.
1.1 - General
The TX Series is a high-end digitally programmable solid state reduced voltage soft
starter. This heavy duty starter provides reduced voltage, stepless soft starting of
3-phase AC induction motors, protecting mechanical components from excessive
torque stress and electrical systems from the effects of high motor inrush currents.
The TX Series includes advanced motor and load protection features just like those
found in expensive motor protection relays. These include retentive thermal
memory, dynamic reset capacity, true thermal modeling, separate trip curves for
start and run protection, overload alarm, etc. In the case of the TX Series, these
features are built in as standard features, providing a cost effective and reliable
motor starting and protection scheme for your critical motor applications.
The TX Series features an easy to use interface operator for programming and
status indication. It includes a large tactile feedback keypad, LED status indica-
tors and a 2 line x 20 character backlit display using plain English text readout. In
addition to programming the standard parameters such as starting torque, ramp
time, current limit, dual ramp and decel control, other features like programmable
overload trip curves (NEMA/UL Classes 5 - 30), starts-per-hour, time between
starts and coast down/back spin lockout protection can also be programmed for
your specific application needs.
1.2 Specifications
Type of Load
Three phase AC induction motors or synchronous motors
AC Supply Voltage
208 - 600 VAC +
10%, 50/60 Hz
HP Ratings
39 - 1250 Amps, 10 - 1125 HP
Unit Overload Capacity
(Percent of motor FLA)
125% - Continuous
500% - 60 seconds
600% - 30 seconds
Power Circuit
6 SCRs
SCR Diode Ratings
(Peak Inverse Voltage)
1600V
Phase Insensitivity
Unit operates with any phase sequence
Transient Voltage Protection
RC snubber dv/dt networks on each phase
Cooling
Convection up to 180A, fan assisted 78 - 120A
Fan ventilated 220 - 1250A
Bypass Contactor
Full horsepower rated contactor included as standard in all Type 12, 3R, 4 & 4X
enclosed units 120A and above.
Ambient Condition Design
Chassis units: 0° to 50 °C (32° to 122°F)
Enclosed units: 0° to 40°C (32° to 104°F)
5 - 95% relative humidity
0 - 3300 ft. (1000m) above sea level without derating
Control
2 or 3 wire 120VAC (customer supplied)
Optional 240VAC control voltage and CPTs are available
Type/Rating: FORM C (SPDT), rated 5 Amps, 240VAC max. (1200VA)
4 Programmable Relays
Approvals
UL Listed, Canadian UL (cUL)
Auxiliary Contacts
