Overview
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.
Features and Benefits
True Thermal Modelling
Monitors the motor for excessive thermal conditions due to starting, running and even ambient conditions.
Retentive Thermal Memory
For continuous overload protection even after a complete power loss. When power is restored, the Centris Soft Starter remembers the last thermal condition of the motor, observes the off time via a real-time clock and adjusts the thermal model accordingly.
Non-Volatile Memory
Stores the thermal memory without the need for batteries.
True Time Thermal Tracking
Adjusts the thermal model for different cooling rates based on motor temperature, running state or power loss.
Dynamic Reset Response Reset
Is only allowed after the motor has sufficient thermal capacity for a successful restart.
Thermal Model Biasing
Adjusts for heating effects of phase current imbalance or optional RTD inputs.
Flexible Setup
Choose the level of overload protection.
Programmable Trip Classes
Selectable from IEC/NEMA Classes 5 – 30.
Dual Mode Protection
Separate trip curves for start and run modes (example: Class 20 for start, Class 10 for run).
Warning Levels
Can be programmed and assigned to one of six built-in output relays.
Custom Trip Curve
Programmable based on the motor manufacturer’s data or it can use a “Learned Overload Curve” that reflects normal running condition with a programmable trip bandwidth.
Remote or Automatic Overload Reset
Can be activated for unattended operation
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