PSD AC Variable Speed Drive

PSD AC variable speed drive has been designed to control the speed of refrigeration compressors. To improve system performance by matching compressor speed to cooling demand. Th e PSD has two dedicated analog inputs, 0 to 10 Volt and 4-20 mA, which can be used to control the speed of the compressor.Th e speed demand signals are provided by an external controller, such as Parker's PSR Rack Controller. Th e PSD has a dedicated compressors motor fl uxing software, providing 20% more starting torque than other drive suppliers, which ensures the compressor always start fi rst time, even under the worst operating conditions, and weak power supplies. With a limited number of control inputs & outputs, plus easy to use LCD programming keypad, with factory set compressor parameters, such as minimum & maximum speed, making the drive easy to install and commission. With a wide power range, 0.75 kW to 110 kW, the PSD can cover the majority of refrigeration applications. Larger drives are available, for application such as chillers, where screw compressors are commonly used.  Advise you can trust. With over 20 years experience in controlling the speed of refrigeration compressors, we have built up a unique compressor cross reference list, with technical details on more than 1.500 compressor models,
enabling us to select the right PSD drive for your compressor and condensing fan.

Benefits:
● Dedicated “compressor software” guarantees compressors start, lowering the risk
of compressor failure
● Dedicated “compressor software” improves the system performance by expanding
the cooling capacity of the compressor
● Matched PSD and PSR controller lowers technical risks and reduces design time
● Improved Product quality better suction temperature control
● Reduced product wastage – improved control of suction line temperature
● Up to 40% energy savings
● Lower maintenance costs because PSD
reduces the start up stress on the compressor
● Easy to install, only 7 parameters to set
(Reduces commissionning costs)