Products - DFE

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DFE

DFE

Low Cost, Internally Bypassed Soft Starter

The DFE is Fairford's internally bypassed, non-optimising Soft Starter which is perfect for panel builders and end users alike.

To the user it offers competitive pricing, soft stopping and the removal of high transient currents. To panel builders it is an ideal substitute for a Star/Delta starter because it fits into a similar footprint, thus simplifying installation. It's now available from 22 Amps to 500 Amps

  • 22 - 500 Amp
  • 11 - 280 kW
  • Internally Bypassed
  • Low Cost Solution
  • Similar Foot Print to Star/Delta Starter
  • For Starts per Hour please see product documentation or contact Fairford

Click here for a datasheet


DFE Main Features

Internally Bypassed

Reduces cost because when the Soft Starter has reached top of ramp the Thyristors are bypassed, this reduces heat and the size of the cabinet required.

Substitution of Star/Delta Starters

  • Lower maintenance costs
  • Less stress on auxiliary equipment when starting
  • Reduced down time
  • Low cost of ownership

Simplified Installation

Rapid build and install time.

No need to change wiring configurations

All six wires of the start delta configuration can be used to minimise installation and design costs.

Competitive with Star/Delta Starters

  • Longer life
  • Less maintenance
  • Lower cost of ownership


Specifications and Ratings


Operational Voltage (Ue)

230-460VAC rms 3 Phase (-15%+10%)

Rated Frequency

50-60 Hz +/- 2Hz

Index Ratings
Standard (DFE-02 - DFE-26) AC53b: 3-5: 355
Class 10B (DFE-02 to DFE-26) AC53b: 3.5-12: 708
Standard (DFE-30 – DFE-38) AC53b: 3-5: 355
Class 10B (DFE-30 – DFE-38) AC53b: 3.5-12: 1188

Control Supply

24V DC Supplied externally to terminals X1-X2
Dfe-34 to Dfe-38 need a power supply capable of 3 amps for 1 second
Power supply kit (12VA) available as part No. AMISC0005.

Soft Start/Stop Control

24V DC/110V AC galvanically isolated terminals A1-A2

Auxiliary Circuits (Relays)

Run - 13/14, Ready - 23/24. 230VAC 3A, Ac11

Indication

Multifunction LED on the front of the unit

Start Time

0.5 to 30 Seconds

Stop Time

0 to 30 Seconds

Power Terminals


Input 1/L1, 3/L2 and 5/L3
Output 2/T1, 4/T2 and 6/T3
Up to 55kW IP20 rated wire clamping terminals
75kW to 280kW External Busbars

IP Rating

Up to 55kW IP20
75kW to 280kW IP00

Ambient Temperature

0°C to 40°C
Above 40°C de-rate linearly by 2% of unit FLC per °C to a de-rate of 40% at 60°C

Transport and Storage

-25°C to +60°C

Altitude

1000m. Above 1000m de-rate linearly by 1% of unit FLC per 100m to a maximum altitude of 2000m.

Humidity

Max. 85% non-condensing, not exceeding 50% at 40°C

Click here for a datasheet