Overview
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 the panel builder it can easily substitute a Star/Delta starter because it fits into a similar footprint thus simplifying installation.
The DFE is now UL Listed up to DFE32
Features and Benefits
Internally Bypassed
Reduces cost because the Soft Starter is out of circuit once it has done its job. This reduces cabinet size and the heat produced which again reduces cost.
Can Substitute Star/Delta Starter
Quicker build time, less maintenance cost, reduced down-time and therefore lower cost of ownership.
Competitive with Star/Delta Starters
Longer life, less maintenance, reduced down-time and therefore lower cost of ownership.
Removal of high transient currents
Star/Delta Starters cause ‘shock loading’ to mechanical systems leading to high rates of contactor failure and increased maintenance costs. The DFE Soft Starter with its smooth step-less acceleration virtually eliminates these problems.
Simplified Installation
Rapid Build and Install Time.
No Need to Change Layout Drawings
Saves time and cost.
Product Options
APSU005-R – 100/230VAC to 24VDC – Power Supply for DFE 02 to DFE 16 
APSU006-R – 100/230VAC to 24VDC – Power Supply for DFE 22 to DFE 38
Technical Data
Current
22 – 500 Amp (11 – 280kW @400V)
Operational Voltage
230 – 460 VAC rms (-15% +10%)
Control Supply
24VDC.
DFE 02 – DFE 16 requires Approx 4VA
DFE 22 - DFE 32 requires Approx 12VA
DFE 34 – DFE 38 requires 3 Amps for 1 Second
Rated Frequency
50 – 60 Hz +/- 2Hz
Start Time
0.5 to 30
Stop Time
0 to 30 Seconds
Standards
IEC 60947-4-2
CE
UL Listed to DFE32
RoHS
Index Rating
DFE 02 – DFE 26
Standard AC53b: 3-5:355
Class 10B AC53b: 3.5-12:708
DFE 30 – DFE 38
Standard AC53b: 3-5:355
Class 10B AC53b: 3.5-12:1188
Ingress Protection
IP20 (Up to 55kW)
IP00 (75kW to 280kW)
Ambient Temperature
0°C to 40°C.
Above 40°C de-rate linearly by 2% FLC per °C to a maximum of 60°C.
Altitude
1000m
Above 1000m de-rate by 1% FLC per 100m to a maximum of 2000m
Manuals
DFE Brochure This is a brochure detailing the sales highlights of the DFE range of Soft Starters.
DFE Basic Guide to 195A This is the quick start guide for the DFE range of Soft Starters describing their basic use and operation.
DFE Basic Guide to 500A This is the quick start guide for the DFE range of Soft Starters decribing their basic use and operation.
PSU Brochure This is a brochure detailing the sales highlights of the 24VDC Power Supply Units.
Case Studies
High quality, economical, and reliable Motor Control solution
H3 Pump Controls, a division of Triple H Specialty Co. Inc, was challenged to provide a small rural municipal in Alston, Georgia, USA with a high quality, economical, and reliable Motor Control solution for the town’s new water well project.
H3 Pump Controls quickly decided that the Fairford Electronics’ DFE Motor Control product had exactly what we needed. The key decision factors in choosing the DFE were, a basic “setup” Motor Control was needed to enable the municipality to maintain the operation of the product after the purchase, with little maintenance or no maintenance. An economical approach was needed for the Motor Control to help meet the local government’s budget demands. A rugged Motor Control unit with great reliability was required to keep the confidence of the municipality.
If you think your business can benefit from our Motor Control solutions please get in touch.
