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Centris - Softstarter medie tensiune

Cod furnizor: 112

Medium Voltage soft starter

Range 2.3 kV – 15kV

Centris is the fully featured medium voltage soft start motor controller

Centris soft start motor controllers are designed to start AC motors in any fixed speed application.  They provide maximum protection with ‘True Thermal Modelling’ while allowing smooth, stepless control of acceleration and deceleration.  Centris guarantees power control and protection for your most important assets, vital in an unpredictable world.

Flexible control features and selectable ramping profiles are available to match any application so there is no need to compromise on power.  Sealed NEMA 12/IP55 rated enclosures are standard as are built in 120v control power transformers, load-break/fault make disconnect switches, heavy duty SCR assemblies with ring transformer isolation, and line isolation vacuum contactors.

Rated at 500% for 60 seconds, Centris will never be the limiting factor in your application.  Powerful sustained gate pulse ensures reliable SCR firing without reactors. High end motor protection, fully rated bypass contactor and fibre optically isolated means the Centris soft starter is the pinnacle of product development.

Peak performance and protection guaranteed from your critical medium voltage equipment, when your motors are protected and controlled by Fairford’s Centris Soft Starters.

Technical Data

Type of Load
3-phase medium voltage AC induction or synchronous motors

AC Supply Voltage
2300, 3300, 4160, 6000/7200V, 11-15kV
VAC +10% to -15%, 50/60 Hz line voltages

HP Ratings
Up to 10,000 HP @ 7.2kV (1500 Amps)
Up to 20,000 HP @ 15kV (800 Amps)
Contact Fairford Electronics for higher rating requirements

Overload Rating
AC53b 600-30-60m

Power Circuits
Series strings of SCR power modules (1, 2 or 3 matched pairs of SCRs per phase depending on voltage rating)
SCR Peak Inverse Voltage
Line Voltage PIV Rating Line Voltage PIV Rating
2300 6500 6500 19500
3300 9000 6900-7200 26000
4160 13000 11000 27000
6000 18000 13-15kV 39500

BIL Rating
2300V – 7200V 60kV
11000 – 15000V (110kV)

Transient Voltage Protection
dv/dt circuits (1 per SCR pair)

Vacuum Bypass Contactor
Standard on all models, 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 Form C contacts rated 5A @ 250VAC max.
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
Power Ramp Function
Three Custom Curves Via plotted torque/time axis points
Pump-Flex™ Deceleration 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 Trip
Starter Over-Temp Coast Down Lockout
Starts per Hour Lockout Time between starts
RTD Input (Option) Ground Fault (Option)

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

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