SIEMENS
4-1
2015 Low Voltage AC Motors Selection and Pricing Guide
Introduction
General
Purpose Motors
Hazardous
Duty Motors
Definite
Purpose Motors
Special
Features Detail
Options
Selection
and Pricing
Typical
Performance Data
General
Dimensions
Severe
Duty Motors
Part Number
Index
When NEMA
Nominal F.L.
Efficiency is
Then Minimum
F.L. Efficiency
is:
96.5
95.8
96.2
95.4
95.8
95.0
95.4
94.5
95.0
94.1
94.5
93.6
94.1
93.0
93.6
92.4
93.0
91.7
92.4
91.0
91.7
90.2
91.0
89.5
90.2
88.5
89.5
87.5
88.5
86.5
87.5
85.5
86.5
84.0
85.5
82.5
84.0
81.5
82.5
80.0
81.5
78.5
80.0
77.0
78.5
75.5
77.0
74.0
75.5
72.0
74.0
70.0
• Typical Performance Data Notes:
To find amperes at various voltages:
• 575 V Data = 460 V Amperes x .80
• 230 V Data = 460 V Amperes x 2.0
• 200 V Data = 460 V Amperes x 2.3
(Amperes = Full Load, Locked Rotor and No Load Values - from data pages)
All other data (kVA Code, Efficiencies, Power Factors, Torques and Stall Times) remain
same as 460 V Data (winding connections can change - rarely - with voltage designs).
• HP x 0.746 = kW
kW x 1.341 = HP
•
•
• WK2 (Inertia - Lb. Ft.
2
) at Motor Shaft =
(Load RPM ÷ Mtr. F.L. RPM)
2
x Load WK
2
• Inertia (Kilogram - meter
2
):
kgm
2
x 23.73 = Lb. Ft.
2
(Lb. Ft.
2
÷ 23.73 = kgm
2
)
(Lb. Ft.
2
x .042 = kgm
2
)
GD2 (kgfm
2
) x 5.933 = Lb. Ft
2
• Torque (Newton - meters):
Nm x .7376 = Lb. - Ft.
kW x 1.341 = HP
• Power (Kilowatts):
(HP ÷ 1.341 = kW)
(HP x .746 = kW)
• Temperature:
ºC = 5/9
(°F - 32)°F = (9/5 x °C) + 32
Torque (Lb. – Ft) =
HPx520
RPM
HP =
Torque (Lb. – Ft) x RPM
5250
Typical performance data
Technical notes