HFE-2 Soft Start User Manual
MAN-HFE-002. Version 01. 18/08/2016
2
HFE Energy Saving soft starters are designed to control single phase AC motors. Operation is fully
automatic, a low starting voltage is applied to the motor as soon as the supply is switched on. The internal
automatic ramp control is immediately activated and raises the voltage progressively, causing the motor to
accelerate smoothly.
At the end of the ramp period, the motor is operated in Energy Saving (iERS) mode and the HFE
continuously regulates the voltage to match mechanical load. Energy consumption at light loads is reduced,
motor winding and case temperatures are lowered, motor life is extended, noise levels are reduced and
power factor is improved.
Two LED’s on the front of the unit indicate when the POWER supply is connected and when the unit is in
iERS mode. As energy consumption is reduced the iERS LED flashes at a slower rate.
The HFE remains in circuit until the supply is disconnected. The HFE automatically resets and is ready for
the next start.
Important information
Installers should read and understand the instructions in this guide prior to installing, operating and
maintaining the soft start. The following symbols may appear in this guide or on the soft start to warn of
potential hazards or to draw attention to certain information.
Dangerous Voltage:
Indicates the presence of a hazardous voltage which could result in
personal injury or death
.
Indicates a potential hazard. Any instructions that follow this symbol should
be obeyed to avoid possible damage to the equipment, and personal injury or death.
Protective Earth (Ground):
Indicates a terminal which is intended for connection to an
external conductor for protection against electric shock in case of a fault.
Caution Statements:
The examples and diagrams in this manual are included solely for illustrative
purposes. The information contained in this manual is subject to change at any time and without prior
notice. In no event will responsibility or liability be accepted for direct, indirect or consequential damages
resulting from the use or application of this equipment.
Short Circuit:
Fairford soft starts are not short circuit proof. After severe overload or short circuit, the
operation of the soft start should be fully tested by an authorised service agent
HFE soft starts contain dangerous voltages when connected to the mains supply. Only qualified
personnel that have been completely trained and authorised, should carry out installation,
operation and maintenance of this equipment. Installation of the soft start must be made in accordance
with existing local and national electrical codes and regulations and have a minimum protection rating. It is
the responsibility of the installer to provide suitable grounding and branch circuit protection in accordance
with local electrical safety codes.
This soft start contains no serviceable or re-usable parts.
Optimising Motor Control (iERS)
Safety
