COVID-19 - update

The health and well-being of our employees, customers and suppliers are of paramount importance to us.

We continue to monitor the latest advice and guidance from the government and are working on measures across our business to minimise any future disruption which we may experience.

Motortronics has been deemed part of the “essential” business supply chain due to the industries and customers we serve.

We have a carefully restructured operation in place to ensure continuity of service and supply and will continue to ensure that we are following latest government & health guidelines to support the health and welfare of our staff worldwide.

Our staff are available via phone, email or video conference facilities in lieu of face to face meetings.

We are continuing to monitor the situation and should anything change a member of our team will be in touch directly. For more information click here for a statement from Motortronics’ Vice President – Joyce Mitchell.


AC Supply Voltage 2300, 3300, 4160, 6600, 7200V, 11kV VAC +10% to -15%, 50/60 Hz line voltages
HP Ratings Up to 4,400HP @ 7.2kV (400 Amps max)
Up to 6,700HP @ 11kV (400 Amps max)
Contact factory for higher rating requirements
SCR Overload Ratings 500% - 60 seconds, 600% - 30 seconds
Power Circuits Series strings of SCR powermodules (1, 2 or 3matched pairs of SCRs per phase depending on voltage rating)
SCR Peak Inverse Voltage Line Voltage 2,300V, PIV Rating 6,500V
Line Voltage 3,300V - 4,160V, PIV Rating 13,000V
Line Voltage 6,000V - 7,200V, PIV Rating 19,500V
Line Voltage 11,000V - 15,000V, PIV Rating 39,000V
BIL Rating 2,300V - 7,200V: 60kV
11,000 - 15,000V: 110kV
Transient Voltage Protection dv/dt circuits (1 per SCR pair)
Vacuum Bypass Contactor Standard on allmodels, line start rated
Ambient Operating Conditions 0 - 50°C (82° F to 122° F) (Optional -20° to 50° C with heaters)
5 - 95% relative humidity
0 - 3300 ft (1000m above sea level without derating)
Digital Control Unit (DCU) Programmable keypad/operator with 2 lines x 20 character backlit LCD display. Status/Alarm LEDs (indicate: Power, Run, Alarm, Trip, Aux 1 - 8)
Auxiliary Contacts Multiple FormC contacts rated 5A @ 250VACmax. 6 fully programmable relays (including fail-safe operation) 5 dedicated relays (fault, at-speed, etc. )
Programmable Features Motor FLA, service factor, insulation class
Dual Ramp Adjustments - Two independent settings for:
Initial Torque 0 - 100% of nominal torque, voltage or current
Current Limit 200 - 600% of motor FLA
Acceleration Time 1 - 120 seconds
Three Custom Curves Via plotted torque/time axis points
Pump-FlexTm Decel 1 - 60 seconds with begin & end torque adj
Kick Start 0.1 - 2.0 seconds (10 - 100% voltage)
Tach Feedback (option) Closed loop speed ramp
Motor and Starter Protection Electronic Overload, Phase Loss
Phase Imbalance, Phase Reversal
Short Circuit Detection, Over / Under Current
Over / Under Voltage, Shorted SCR / Shunt Tri
p Starter Over-Temp, Coast Down Lockout
Starts per Hour Lockout, Time between starts
RTD Input (Option), Ground Fault (Option)g
Statistical Data Elapsed run time, last start time, average starting current, stores history of up to 60 events (data includes date & time, phase & ground fault current). Also displays time-to-trip, remaining inhibit time and starts/hour values.
Metering (Voltage & Current) Percent of FLA, phase currents, kVAR, kVA, kW, power factor, demand, avg. start current, remaining thermal register, thermal capacity to start,measured capacity to start, time since last start, line frequency, phase order, RTD values (optional)
Enclosure NEMA 12 with 3R optional (not for direct sun applications), top and bottom entrance plates, 11 gauge steel, ASA #61 gray powder coated paint
Communications RS485 with Modbus RTU protocol or RS232 with windows interface

Available Communications Options: Ethernet/IP, Modbus TCP, DeviceNet Profibus DP, PROFINET

For EU compliance information please contact Motortronics UK

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