Page 118 - DMcatalogue2017

Useful engineering information

Reference information and explanation of abbreviations

Degrees of protection Note for gearbox users – service factor
As defined by IEC34-5 and BSA999 pt 105, the code generally The geared motors covered by this catalogue are rated for
consists of ‘IP’ followed by two digits: the first describing the driven machines with a uniform load for continuous duty or
protection against solid bodies or protection to persons against occasional moderate shock loading on single-shift operation,
contact with live or moving parts inside the enclosure; the being known as a Unity Service Factor. For applications with
second describing the protection against ingress of water. short-time duty, high inertia or heavy shock loads, advice
should be sought on calculating the correct service factor and
First Meaning Second Meaning selecting the most suitable gearbox type.
Digit (Protection Against) Digit (Protection Against)
0 Not protected 0 Not protected Abbreviations
1 50mm dia. body 1 Vertical drips
2 12mm dia. body 2 Drips up to 15° from vertical Electrical data
3 2.5mm dia. body 3 Drips up to 60° from vertical Kilowatt = kW
4 1mm dia. body 4 Splashing from any direction
5 Dust protected 5 Water jets from any direction Volts = V
6 Dust tight 6 Heavy seas (Does not cover Armature Volts = Va
corrosion resistance etc) Field Volts = Vf
7 Effects of immersion
Amperes = A
Cooling forms Armature Current = la
As defined by IEC34-6 and BS4999 pt.106, the code generally Field Current = If
consists of ‘IC’ followed by two digits; the first describing the Power factor = PF
cooling circuit arrangement; the second describing the method
of supplying power to circulate the coolant. Where more than Useful conversion factors
9 one cooling circuit is in use, these may be expressed as ‘IC’ 1hp = 746W
followed by groups of two digits, e.g. IC0141. 1Nm = 8.851 lb.in
1mm = 0.03937inch
The following forms are used in this catalogue: 1m = 10.765ft 2
2
IC410 – Typical examples are roller table motors 1kg.m = 1Nms = 0.73752 lb.ft 2
2
2
IC411 – Standard motors
IC416 – Standard motors (normally bigger frame sizes only Useful formulae
equipped with auxilliary fan) 1 Watt = 1 Nm/s
IC418 – Fan application motors without a cooling fan,
cooled by the air stream of the driven machine Torque (lb ft) = 5250 x hp
IC01 – Open drip-proof motors speed (rpm)
IC31W – Water cooled motors
Torque (Nm) = 9550 x kW
Mounting forms speed (rpm)
The arrangements are defined by IEC34-7, BS4999 pt. 107
code II (and DIN42950). The following forms are used in this 3 phase = 1.732 x V x I x PF
catalogue and are for motors with two bearings housed in AC power (kW) 1000
end-shields. When flange mounting they have access to the
back of the flange. 1 phase = V x I x PF
AC power (kW) 1000
IM1001 (B3) Horizontal foot mounted
IM1011 (V5) Vertical foot mounted Useful servo drive calculations
IM3001 (B5) Horizontal flange mounted Correctly rating a servo motor and drive application often
IM3011 (V1) Vertical flange mounted involves mechanical calculations. Overleaf are typical
IM2001 (B35) Horizontal foot & flange mounted examples of some of the commonly occurring formula that are
IM1071 (B8) Horizontal foot, ceiling mounted often encountered. These are provided for general guidance
only and any results may need to be modified to take into
account specific application details such as mechanical
losses, inclined angles and duty cycles etc.

118 Drives and controls, motors and mechanical power transmission catalogue