Variable Speed Drives

RANGE OF VARIABLE SPEED DRIVES

PSI supply a range of variable speed drives to suit a variety of applications. Up to 90kVA power range, we can often recommend the perfect solution to suit your requirements.

VSD-PE100COST EFFECTIVE, COMPACT AND HANDY

POWER RANGE: 0.5kVA to 2.5kVA
INPUT VOLTAGE: 200V TO 230V SINGLE PHASE
OUTPUT VOLTAGE: 200V TO 230V 3 PHASE
FREQUENCY RATINGS: 0 TO +/- 400HZ
IP20
RFI Filter and optional Modbus RTU communications

VSD-PE300HIGH PERFORMANCE

POWER RANGE: 0.5kVA to 30kVA
INPUT VOLTAGE: 200V TO 240V Single Phase or 3 Phase / 380V to 480V 3 Phase
FREQUENCY RATINGS: 0 TO +/- 400HZ
IP20 or IP66
BUILT-IN EMC FILTER AND COMPLIANT WITH
INTERNATIONAL STANDARDS
BUILT-IN SAFE TORQUE OFF (STO) AND REDUNDANT INPUT CIRCUIT
Specific for heavy-duty applications that require high starting torque and precise control.

VSD-PE500OUTSTANDING CONTROL FEATURES

POWER RANGE: 0.7kVA to 90kVA
INPUT VOLTAGE: 200V TO 240V Single Phase or 3 Phase / 380V to 480V 3 Phase
FREQUENCY RATINGS: 0 TO +/- 400HZ
IP20 or IP66
EMC and harmonic filters integrated across the range, optional dV/dt filter

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Where the speed drives are really useful?
ENERGY SAVING!

Fans

Reducing the speed of the fan is a much more energy efficient way than dampers to regulate the output of fans.

PUMPS

Using a variable speed drive to control the pump rather than using simple throttle control can result in significant power SAVING.

AIR COMPRESSORS

The potential for energy savings from using VSDs for air compressors will depend on the control system being replaced.

What is a Variable Speed Drive – VSD?

Adjustable speed drive (ASD) or variable-speed drive (VSD) describes equipment used to control the speed of machinery. Many industrial processes must operate at different speeds for different products.

Most motors are designed to operate at a constant speed and provide a constant output; however, modern technology requires different speeds in many applications where electric motors are used. Effects of applying VSDs are in both productivity improvements and energy savings in pumps, fans, compressors and other equipment.

“VSDs enhance process operations, particularly where flow control is involved. VSDs provide soft-start capabilities, which decrease electrical stresses and line voltage sags associated with full voltage motor start-ups, especially when driving high-inertia loads.” (S.S. Turkel)

Differences between a variable frequency drive (VFD) and a variable speed drive (VSD)

A variable frequency drive (VFD) refers to AC drives only and a variable speed drive (VSD) refers to either AC Drives or DC Drives. VFDs vary the speed of an AC motor by varying the frequency to the motor. VSDs referring to DC motors vary the speed by varying the voltage to the motor.

Get in touch

+44 (0)1494 871544

info@powersystemsinternational.com

Carina House East,Sunrise Parkway,
Linford Wood,Milton Keynes,
MK14 6LS, England

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Power Systems International Limited was established in the UK in 1986 and the name was chosen as a strong brand name recognising its position in both the international markets where operated and the total reliability of power products demanded for critical loads of all types.

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