Catalog

IEC Squirrel-Cage Motors
Introduction
1
General technical data
Energy-saving motors with European efficiency classification in
accordance with EU/CEMEP (European Commitee of Manufacturers
of Electrical Machines and Power Electronics)
Low-voltage motors in the output range of 1.1 to 90 kW, 2-pole
and 4-pole are marked in accordance with the EU/CEMEP
agreement with the efficiency class (Improved Efficiency) or
(High Efficiency).
So that the requirements of efficiency classes and are
fulfilled, the active parts of the motor have been optimized. The
procedure for calculating the efficiency is based on the losssummation
method according to IEC 60034-2.
Motors for the North American market
For motors which comply with North American regulations
(NEMA, CSA, UL, etc.), it must always be checked whether the
motors will be used in the US or Canada and whether they are
subject to state laws.
Minimum efficiencies required by law
In 1997, an act was passed in the US to define minimum efficiencies
for low-voltage three-phase motors (EPACT = Energy
Policy Act). An act is in force in Canada that is largely identical,
although it is based on different verification methods. The efficiency
is verified for these motors for the USA using IEEE 112,
Test Method B and for Canada using CSA-C390. Apart from a
few exceptions, all low-voltage three-phase motors exported to
the USA or Canada must comply with the legal requirements on
efficiency.
The law requires minimum efficiencies for 2, 4 and 6-pole motors
with a voltage of 230 and 460 V/60 Hz, in the output range of 1
to 200 HP (0.75 to 160 kW). Explosion-proof motors must also be
included. 1LA9 and 1LG6 are also available in the design for
Zones 2, 21 and 22.
According to EPACT, the following are excluded from the efficiency
requirements, for example.
• Motors whose frame size output classification does not correspond
with the standard series according to NEMA MG1-12.
• Flange-mounting motors without feet
• Brake motors
• Converter-fed motors
• Motors with design letter C and higher
For more information on EPACT:
http://www.eren.doe.gov/
Special requirements for the USA: Energy Policy Act
The act lays down that the nominal efficiency at full load and a
“CC” number (Compliance Certification) must be included on
the rating plate. The “CC” number is issued by the US Department
of Energy (DOE). The following information is stamped on
the rating plate of EPACT motors which must be marked by law:
Nominal efficiency (service factor SF 1.15), design letter, code
letter, CONT, CC-Nr. CC 032A (Siemens) and NEMA MG1-12.
Special requirements for Canada: CSA – Energy Efficiency
Verification
These motors fulfill the minimum efficiency requirements laid
down by the CSA standard C390. These motors are available as
1LA9 or 1LG6 and can be ordered with order code D40 and are
also marked with the CSA-E verification on the rating plate.
NEMA – Order code D30
The motors with increased efficiency according to EPACT are
designed to meet the NEMA MG1-12 electrical standard and are
marked accordingly. The mechanical design of all motors is
compliant only to IEC, not to NEMA dimensions.
All motors in the D30 version correspond to NEMA Design A (i. e.
standard torque characteristic in accordance with NEMA and no
starting current limitation).
For Design B, C and D, a special version is required (on request).
According to NEC-ANSI-C1, Division 2, Class I, Group A, B, D,
all 1LA/1LG motors that comply with Zone 2 can be used.
All other 1LA/1LG motors must be ordered with order code D30.
Data on the rating plate: Rated voltage (voltage tolerance of
–10%), nominal efficiency, design letter, code letter, CONT and
NEMA MG1-12.
UL approval – Order code D31
The motors based on the 1LA/1LG basic series are listed for up
to 600 V by Underwriters Laboratories Inc. (“Recognition Mark”
= R/C).
For Zones 2, 21, 22 and EEx e motors or EEx de motors as well
as marine motors, there is no listing.
The motors must be ordered with order code D31, voltage code
“9” and the order code for voltage and frequency.
According to UL, motor voltages are only certified up to 600 V,
i. e. voltage codes 1, 3, 4 or 5. For this reason, voltage code “6”
for example is omitted (400 VD/690 VY/ 50 Hz or 460 VD/60 Hz).
Voltages 400 VD and 460 VD, for example, should be ordered as
follows:
Voltage
Voltage code
400 VD/50 Hz or
9 with L1U 1)
460 VD/60 Hz (50 Hz output)
460 VD/60 Hz (50 Hz output) 9 with L2T
460 VD/60 Hz (60 Hz output) 9 with L2F
The “UL Recognition Mark” is included on the rating plate of the
motor.
In addition, the motor is designed to meet the NEMA MG1-12
electrical standard (with the exception of non-standard motors)
and includes the following data on the rating plate: Rated voltage
(voltage tolerance of –10%), nominal efficiency, design letter,
code letter, CONT and NEMA MG1-12.
Externally or internally mounted components such as
• Motor protection
• Heating element
• Separately-driven fan
•Brake
• Encoder
• Power connection
• Plug connector
are UL-R/C, CSA or C-US listed or used by manufacturers in accordance
with regulations. It may have to be decided whether
the motor is suitable for the application.
The motors can be operated with a frequency converter – separate
converter or built-on (1UA7/order code H15) – with
50/60 Hz.
Deviating frequency settings must be tested at final acceptance.
The external fans for 1LA8 and 1LL8 motors must be made of
metal.
The following versions are possible:
•2-pole 2) motors, only in combination with K37 or K38
• 4, 6 and 8-pole motors, only in combination with K35
1) Only applicable to non-standard motors.
2) Frame size 450 in 2-pole version, on request.
Siemens D 81.1 · 2006
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