3
Motor
Manual
1 Notice
This manual must be followed to ensure proper and safe
installation, operation and maintenance of the motor. Prod-
ucts must be handled by qualified personnel, and health
and safety requirements and national legislation must be
observed. Ignoring these instructions will invalidate all ap-
plicable warranties of Hoyer Motors.
1.1 General information
This manual concerns the following types of standard low
voltage induction motors from Hoyer Motors: HMA4, HMC4,
HMA3, HMC3, HMA2, HMC2, HMD, HMT, MS, Y2E1, Y2E2,
YDT. Explosion-proof low voltage motors are not covered by
this manual.
All motors are manufactured in accordance with IEC/
EN 60034-1 and IEC/EN 60072 unless otherwise specified.
Motors are rated as standard for the ambient temperature
range of -20°C to +40°C and site altitudes up to 1000 m above
sea level. Low voltage motors are components for installa-
tion in machinery. The motors are CE marked according to
the Low Voltage Directive 2014/35/EU.
Motors not fulfilling the IE3 efficiency level must, before the
1st of July 2021, be equipped with variable frequency drives
(VFD) when used in the EU. Information about the required
use of a VFD must be shown on the nameplate or an ad-
ditional label or plate, and in the technical documentation
of the motor.
1.2 Safety instructions
Personnel who commission, transport, maintain or install
motors should have obtained qualified training and safety
knowledge. Safety equipment is necessary to prevent ac-
cidents. Local regulations and requirements must also be
observed. Failure in operation can cause injury to personnel
and damage to the motor.
The specified data and recommendations must be observed to
avoid hazardous situations and the risk of injury or damage.
Custom designs and other non-standard motors can vary in
technical details. If in doubt contact Hoyer Motors, stating
the type designation and serial number of the motor.
1.2.1 Operation
For safe operation it must be ensured that no external parts
interfere with the rotating shaft.
The shaft key must be securely fastened in the keyway be-
fore the motor is started. If the motor is run for no-load
testing, the key must be fixed in the keyway or removed.
The motor must be handled and operated properly to avoid
accidents during operation. If the motor is not running
properly, switch off the power supply. The power supply
must be switched off when troubleshooting.
Maintenance is required and must be done on a regular ba-
sis to prevent failures.
1.2.2 Lifting
For safety reasons all Hoyer motors with frame size 100 or
larger are equipped with eyebolts for lifting. Before lifting
the motor, ensure that the eyebolts are undamaged and
screwed tight. When lifting the motor, make sure that the
motor is not attached to any equipment or mounted by the
feet, shaft or flange. Only use the main eyebolts on the mo-
tor frame to lift the motor. Do not use damaged eyebolts.
If crane slings are used, prevent them from slipping and
maintain full control when lifting the motor.
1.2.3 Transport
The motor must be fixed on a pallet (by ropes, cables, bolts,
etc.) during transport. This means it must be secured so
it cannot move or be damaged during transport. Broken
equipment and unstable machines can cause serious inju-
ries.
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