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The ACS310 AC Drive is designed for fast installation and commissioning – particularly for pump and fan applications.

The addition to ABB’s AC Drive line ranges from 200-480V AC and from 0.5 to 30HP (0.37 to 22kW).

The drive is fitted with a set of features that fulfill pump and fan application needs – complemented with advanced, energy-efficient functionality.

The ACS310 comes standard with two powerful, independent and built-in PID controllers for regulating pressure, flow or other quantities on the basis of the actual need.

The PID control is used in automation and process industries to control the actual system and its performance.

Such applications include: motor speed control in various conveyor applications; pressure and temperature control like that used in ventilation systems; flow control in pumping systems; and different kinds of level-control applications.

The second PID controller can eliminate the need for an external PID controller and helps to improve the quality of the process, and save energy and up-front costs.

PFC and SPFC built-in pump and fan control (PFC) switches auxiliary pumps on and off, as required by capacity changes.

Auto-change function alternates between pumps to keep the duty times of the pumps equal.

With the PFC feature, one drive is able to control several pumps or fans in parallel.

An auto-change function (when enabled and with the appropriate switchgear) equalises duty time between the pump motors.

Auto-change periodically increments the position of each motor in the rotation – that is, the speed-regulated motor becomes the last auxiliary motor and the first auxiliary motor becomes the speed-regulated motor.

The interlocks function enables the drive to detect if any of the pumps is unavailable, in which case the next available pump is started instead.

Soft pump and fan control (SPFC) is used for pump and fan alternation applications where lower pressure peaks are desirable when a new auxiliary motor is connected online.

SPFC is said to be an easy way to implement soft starting of direct on line (auxiliary) motors.

The main difference between traditional PFC and SPFC is the way SPFC connects auxiliary motors online – while the motor is still coasting.

In some cases, SPFC makes it possible to soften the start-up current while connecting auxiliary motors online.

This is why lower-pressure peaks on the pipelines and pumps also may be achieved.

SPFC control requires the auto-change function (and the appropriate switchgear).

The ACS310 comes standard with advanced pump-protection functions such as pipe fill – a pre-programmed control method to start a pump system and fill the pipelines.

Pipelines are filled smoothly with water before closed-loop control is activated.

Pump cleaning executes a pre-programmed cleaning sequence for the pump at drive start or when required with some other source, such as digital inputs or current/torque limits.

The pump cavitation function allows the supervision of pump inlet and outlet pressure through external sensors.

The pump protection function can be used to generate an alarm on the display, provide protection during the event, or trip the drive on a fault.

ABB Automation Tech – Drives and Motors

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