SECTION A
AC & DC ELECTRIC MOTORS
Are there special requirements to mount IEC B14 motors?
No special tools are required. Please carefully follow motor side coupling mounting dimension tolerance per the relevant drawings. Failure to
do so may cause malfunction of the power pack and even breakage of the coupling and pump.
Are AC motors compliant with the European Union Minimum Energy Performance Standards?
Hydronit AC motors are manufactured in Italy using the best technologies currently available and are specifically designed for mini power
pack duties, typically intermittent. Hydronit motors have higher power density, lower weight and lower cost, compared with standard IE2/IE3
motors on the market. Due to the specific field of application, Hydronit motors are not included in the requirements of the above mentioned
Standard since they are specifically and solely manufactured for mini power pack intermittent duties. For continuous duty applications IE2
motors (IEC 60034-30) must be applied. Ask our sales office.
Can I start single phase AC motors under load?
Single phase motors have a reduced starting torque due to their intrinsic design. Starting torque is around 30-40% of the nominal torque at
full power output. When designing circuits where a single phase motor must start under load, a proper calculation must be done followed by a
field test to ensure proper starting. High starting torque «HT» motors are available. Ask our technical office. Alternatively, you can overcome
the problem with the startup valve SUV.
Integral AC motors: the engineered solution for compact and optimised power units from 0,25 to 4 kW, single or three phase,
4 or 2 poles. These AC motors are directly flanged on the central manifold for extra compactness. A single tang drive
coupling can suit all frame sizes and powers.
We suggest that you adopt these advanced motors because of their advantages over standard B14 AC motors and because
they are designed specifically for our hydraulic mini power packs, offering a higher power density and high starting
torque than market standard motors. These motors are intended for intermittent duty (S3 40%), which is normal for most
mini-power pack applications. In emergency situations they may be used continuously to 70% of their nominal power. Given
their particular construction, single-phase motors must not be operated without load for a long period, to avoid overheating.
Frame 151 DC motors: heavy duty motors, with fan
cooling, thermal protector and running time of 16 min or
over. Power from 2,5kW 12VDC up to 4kW 24VDC.
Frame 114 DC motors: the most popular choice. Power
up to 2,1kW 12VDC and 2,2kW 24VDC. All motors have
thermal protector switch as standard.
Coupling with integrated fan
cooling: for DC motors frame
114 and 125.
sales@hydronit.com · +39 02 320 625 145
PPC2014/1-A000
www.hydronit.com
B14 IEC standard AC motors: the standard
solution easily available in every market from 0,25
to 7,5 kW, single or three phase. These motors are
normally procured by the customer himself. Hydronit
provides adaptor flanges and twopiece coupling for
frame sizes: 71, 80, 90, 100 and 112.
How do I dimension a DC motor?
DC motors are normally for intermittent duty. It is important to know the required flow in l/min, working pressure in bar and the duty charge.
Then, following the table instructions, a proper motor/pump combination can be selected.