Eurotherm 590A SERIES, Product Manual

Page: 9 / 109

1 - 4
1.3 590A INTRODUCTION
The 590A series of motor speed controllers are designed as components which are fitted into a standard
enclosure with associated control equipment. The controllers accept standard three phase supply voltages in the
range 220 to 500 Volt AC. and provide controlled DC. output voltage and current for the armature and variable
voltage for the field, and are suitable for powering DC. shunt field and permanent magnet motors.
Control of the 590 series is implemented by means of analog and digital control loops which provides many
advanced features.
The motor armature controllers include both regenerative and non-regenerative models.
Non-regenerative controllers consist of one fully-controlled thyristor bridge with full transient and overload
protection, together with its associated electronic control circuitry, and provide accurate speed and/or torque
control in one selected direction of rotation.
Regenerative controllers consist of two fully-controlled thyristor bridges together with a sophisticated electronic
control of acceleration and deceleration, speed and torque in both directions of rotation.
All models of armature controller provide an adjustable field supply as standard. The regulator consists of a
full-wave half controlled single phase thyristor bridge with transient and overload protection. The regulator
provides a fixed voltage which is adjustable by either potentiometer or option selection switches.
The control circuit is totally isolated from the power circuit, thus simplifying the interconnection of controllers
within a system and improving operator safety. The control circuitry adjusts automatically to accept supply
frequencies in the range 50-60 Hz and possesses high immunity to supply borne interference. The armature
controllers are phase rotation insensitive.
All units are designed for simple and economical panel mounting using keyhole tags. If it is necessary to remove
the controller from the panel, disconnection and reconnection is simplified by plug-in control connectors.
Standardisation of parts wherever possible throughout the range reduces the variety of spare parts required to
maintain a multi-drive system. For example, the same basic control and trigger PCB's are used in all types of
three phase armature controller regardless of horsepower or bridge configuration.
This manual covers the following models from the 590A series.
Three phase, regenerative, four quadrant armature controllers.
590A - for currents up to 720 Amps.
598A - external stack option for currents exceeding 721 Amps.
Three phase non-regenerative, two quadrant armature controllers.
591A - for currents up to 720 Amps.
599A - external stack option for currents exceeding 721 Amps.
Commissioning and the location of faults (both within the controller and external to it), are greatly assisted by
built in Condition Indicators which show the status of the various system alarms. Further assistance is available
by use of the optional Diagnostic Test unit type 5570 which provides access to 27 alarms, inputs and principal
circuit nodes throughout the Controller. This unit, which is available as a portable hand-held instrument has
output sockets for the connection of an oscilloscope, chart recorder or other instruments.
This manual was downloaded on www.sdsdrives.com
+44 (0)117 938 1800 - info@sdsdrives.com