Product category:
Industrial Drives/Controls
News Release from: Invertek Drives | Subject: Optidrive VTC inverters
Edited by the Engineeringtalk Editorial
Team on 10 September 2007
Inverters pump water in Ireland
Two pressure levels can be set, one at which the drive stops the water pump operating and another at which the drive commences operation again.
Over 70 Optidrive VTC inverters have been installed to control water pumping operations within the Rural Water Scheme underway in the South West of Ireland EPS specified the Optidrive VTC for sites in Limerick and Claire, with more sites now set to follow suit
This article was originally published on Engineeringtalk on 16 May 2000 at 8.00am (UK)
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The Optidrive VTC drives used in this application range from 1.5 to 160kW, three-phase 400V and from 1.5 to 22kW, 220V single-phase.
Field Engineers on this project were given dedicated training locally and at the Invertek Drives' training facility in Welshpool.
In this water pumping application the built-in PID function of the Optidrive VTC is used to control pressure.
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The "Sleep" function then allows two pressure levels to be set, one at which the drive stops the water pump operating and another at which the drive commences operation again.
This ensures that the drive is not constantly switching the water pump on and off around the target pressure, avoiding what is commonly known as a "hunting effect" and saving energy.
An expanded local/remote control function provides significant benefits in pumping applications, allowing the reliable changing of the method of drive control.
Changing from local (hand) control using the keypad to remote (auto) control, where a sensor is used for drive feedback is done at the touch of a button.
The drive then automatically switches to the appropriate speed reference input for the chosen method of control.
The Optidrive VTC is already known for its ease of use plus simple installation and commissioning, making it the lowest cost solution for virtually all variable torque applications.
Its advanced energy saving features include an automatic energy optimiser function, which reduces the motor voltage during partial load conditions, with the ability to automatically revert to normal operating voltage should the load increase.
Optidrive VTC's optical interface allows communication with the Optiwand CE Plus Pocket PC-based commissioning and storage software for fast and accurate product configuration.
Other features include a dynamic fast ramp function, providing faster stopping with large inertia loads, particularly in applications where the inertia is variable and there is no braking resistor.
The drive will decelerate the motor to a stop as quickly as possible without tripping, ensuring no interruptions to the process whilst consistently using the minimum possible time to bring the load to a stop.
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