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1LE0 Low-voltage Motors

SIMOTICS 1LE0 series of 3 phase asynchronous motors isTotally Enclosed Fan Cooled (TEFC) with IP55 environmentalprotection, and applicable for general purpose use. These motorsare designed and manufactured in accordance with ISO, IECstandards, GB standards.

The 1LE0 series motor is designed for constant or adjustablespeed with continuous duty operation (S1) over a speed range.

Features

• Terminal box on top, and cable entry on right side (viewed from driven end). Variable location of connection boxes and cable entries as option.
• Insulation system is designed for temperature class 155 (F). At rated output with line-fed operation, the motors can be used in temperature class 130 (B).
• Self ventilated motors with radial-flow fans (cooling method IC 411 according to IEC 60034-6) as standard, forced air cool with external separately driven fans as option.
• FS 80 ~ 90 motor donot have eyebolt; FS 100 ~ 355 all motors have 2 eyebolts. Aluminum housing motors FS100~160 have integrated cast eyebolts.
• Frame material: grey cast iron or aluminum alloy.
• Standard color: stone grey (RAL 7030)
• Rated power output: 0.55kW~315kW at 50Hz.
• Available in 2, 4, 6 pole motor (0.75kW and up) with efficiency grade 3 or 2. according to GB18613-2012 and efficiency class IE2 or IE3 (50Hz) according to IEC 60034-30.
• Optimized compact style construction.
• Standard mounting construction according to IEC 60034-7: IM B3, IM B5, IM B35 and etc.
• All motors are designed to IP55 degree of protection (IEC 60034-5) .
• Re-greasing devices for FS¹⁾ 280 ~ 355 as standard, and for FS100 ~ 250 as option.
• Reinforced bearings for increased cantilever forces for FS100 ~ 355 as option.
• Winding protections with PTC, PT100 and KTY84-130 as option.

Environmental

-20ºC≤T≤20ºC：100%
20ºC<T≤30ºC：95%
30ºC<T≤40ºC：55%

• Degrees of motor protection IP55 (IEC 60034-5).
• Altitude shall not exceed 1000m above sea-level (IEC 60034-1).
• Allowed air temperature between -20 ºC and 40 ºC (IEC 60034-1).
• Permitted relative humidity:
  -20 ºC ≤ T ≤ 20 ºC：100 %
  20 ºC < T ≤ 30 ºC：95 %
  30 ºC < T ≤ 40 ºC：55 %

For higher coolant temperatures and / or site altitudes higher than 1000 m above sea level, the specified motor output must be reduced by using the factor kHT. The results in an admissible output(Padm) of the motor:

P_adm = P_rated • K_HT

Reference standards

Noise levels

The noise levels are measured in accordance with DIN EN ISO 1680 in a dead room. It is specified as the A-valued measuring-surface sound pressure level Lpfa in dB (A). This is the spatial mean value of the sound pressure levels measured on the measuring surface. The measuring surface is a cube 1 m away from the motor surface. The sound power level is also specified as LWA in dB (A). The following specified values are only valid for totally enclosed fan cooling (cooling method: IC411) motor with no load at 50 Hz with no load, and the tolerance is +3 dB. While motor operating 60 Hz with no load, the values are approximately +4 dB (A) higher.

Vibration

1LE0 rotors are dynamically balanced to severity grade A using a half key. Table below contains the effective vibration values for unloaded motors.

Nameplate

Connection box

The connection box is located on the top of motor housing as standard, and can be rotated by 4×90º to allow for cable entry from each direction. All the connection box have 2 cable entries, one is sealed by the cable gland, and another sealed by screwed plug.

Connection boxes technical data

Location of the connection box

Besides standard position, the connection box also can be on the right or left of motor housing. The position of terminal box can be indicated on the 16th digit of motor order code.

The position of connection box is described by viewed from drive end (DE).

• On top (Standard), 16th position of Motor Order No. digit 4.
• On RHS, 16th position of Motor Order No. digit 5.
• On LHS, 16th position of Motor Order No. digit 6.

If there is interfere between the connection box and other components, the connection box can be moved from the drive end (DE) to non-drive end (NDE) (Option code: H08).

Unless stated, otherwise the cable entry is located in the standard position as show in the following illustration. The connection box can also be rotated such that the cable entry is located.

Towards the drive end (DE)：Rotation of connection box by 90°, entry from DE, Option code R10. For flange motor (IM B5) from FS80 to FS100, only possible with connection box on NDE (Option code H08).

Towards the non-drive end (NDE)：Rotation of connection box by 90°, entry from NDE, Option code R11.

Towards the left side (opposite to Standard)：Rotation of connection box by 180°, entry from opposite end, Option code R12.

If the position of the connection box (connection box RHS or LHS) is changed, the position of the cable entry must be checked. If necessary, it can be ordered with the corresponding order codes (R10, R11 and R12).

Construction and mounting type

Construction type	With feet and without flange on the end-shield (DE)
Mounting type	IM B3FS 80 ~ 355	IM B6FS 80 ~ 315		IM B7 FS80 ~ 315		IM B8FS 80 ~ 315		IM V5 1)FS 80 ~ 315	IM V6 2)FS 80 ~ 315
Diagram
Letter, position 14th of Motor code	A	T		U		V		C	D
Construction type	Without feet and with flange on the end-shield (DE)					With feet and with flange on the end-shield (DE)
Mounting type	IM B5 FS 80 ~ 315	IM V1 1）FS 80 ~ 355		IM V3 2）FS 80 ~ 315		IM B35 FS 80 ~ 355		IM V15 1）FS 80 ~ 315	IM V35 2）FS 80 ~ 315
Diagram
Letter, position 14th of Motor code	F	G		H		J		W	Y
Construction type	Without feet and with C-flange on the end-shield (DE)						With feet and with C-flange on the end-shield (DE)
Mounting type	IM B14 FS 80 ~ 160		IM V18 1）FS 80 ~ 160		IM V19 2）FS 80 ~ 160		IM B34 FS 80 ~ 160
Diagram
Letter, position 14th of Motor code	K		M		L		N

Cooling and ventilation

The 1LE0 standard motors are fitted with an radial flow fan for cooling in accordance with IEC 60034-6 cooling method.

For some special application, separately driven fan should be considered to be configurated.

The use of a separately driven fan is recommended to increase motor utilization at low speed;

When motor speed significantly higher than the synchronous speed, the separately fan is also recommended to be used. It can help reduce the motor noise.

The separately driven fan can be supplied already fitted, Option code F70. When the separately driven fan is mounted, the length of the motor increase by 6L.

Bearing system

50Hz, and also 220 ~ 260VD/380 ~ 480VY 60Hz. Other voltage supply, possible on request.

1LE0 series motors are supplied with the ball bearing as standard. These bearings are either of the sealed or regreasable type.

For FS80 ~ 160, the floating bearings are assembled; for FS180 ~ 355, floating bearing at DE, and fixed bearing at NDE assembled.

The standard bearing can endure a maximum cantilever force, referred to page 11 - Permissible cantilever forces. If higher cantilever force on the shaft required, the increased cantilever bearing design (Option code: L22) should be considered.

As standard, FS80 ~ 250 motors are not with regreasing device, but FS280 ~ 355 motors with regreasable bearing and regreasing device. If necessary, FS100 ~ 250 motor can be configured with regreasable bearing and regreasing device (Option code: L23).

Bearing Assignment

Bearing life time (nominal lifetime)

The nominal bearing lifetime is defined according standardized calculation procedures (ISO 281) and is reached or even exceeded for 90% of the bearings when the motors are operated in compliance with the data provide in the catalog. Generally, the bearing lifetime is defined by the bearing size, the bearing load, the operating condition, the speed and the grease lifetime.

The bearing lifetime of motors with horizontal type of construction is at least 40,000 hours if there is no additional axial loading at the coupling output and at least 20,000 hours with the maximum admissible loads. This assumes that the motor is operated at 50Hz.

When the motor runs outside of normal conditions, the bearing life will be reduced, such as the following conditions.

• When 1LE0 motor runs beyond the rated speed, the increase of motor vibration will result in the extra radial and axial force on bearing. This will reduce the life of bearing;
• When the motor vibration increase due to the environment or other equipment, the bearing also will endure more radial and axial force. This also will reduce the life of bearing;
• If the coolant temperature is increased by 10 ºC, the grease lifetime and regreasing interval is halved.

Grease life and re-greasing interval

For permanent lubrication, the bearing grease lifetime is matched to the bearing lifetime. This can, however, only be achieved if the motor is operated in accordance with the catalog specifications.

For motors which can be regreased at defined regreasing intervals, the bearing lifetime can be extended and/or unfavorable factors such as temperature, mounting conditions, speed, bearing size and mechanical load can be compensated.

Grease life (Horizontal installation）

Permissible cantilever forces on DE shaft

In order to calculate the admissible cantilever forces for a radial load, the line of force (i.e. the centerline of the pulley) of the cantilever force F_Q(N) must lie within the free shaft extension (dimension x).Dimension x [mm] is the distance between the point of application of force F_Q and the shaft shoulder. Dimension xmax. Corresponds to the length of the shaft extension. Total cantilever force is calculated using the following equation.

FQ = c • F_U

The pre-tension factor c is a value gained from experience from the belt manufacturer. The following approximate value can be assumed.

For normal flat leather belts with an idler pulley, c = 2.

For v-belts, c = 2 to 2.5.

For special synthetic belts (depending on the type and load), c = 2 to 2.5.

The circumferential force FU (N) is calculated using the following equation.

F = 2 • 10⁷P/（n×D）

F_U circumferential force in N

F_U：circumferential force in N

P：rated motor power (transmitted power) in kW

n：rated motor speed

D：pulleys in mm.

The table below contains the permissible Radial Force values in Newtons with the assumption of zero axial forces.

Rated Output

1LE0 motors rated output powers means that the motor runs under continuous duty S1 (IEC 60034 - 1) operation when operated at ambient temperature from -20 ºC to 40 ºC and at altitudes of up to 1000 m over sea.

Voltage and Frequency

IEC 60034-1 differentiates between Category A (combination of voltage deviation ±5 % and frequency deviation ±2 %) and Category B (combination of voltage deviation ±10 % and frequency deviation +3 % / -5 %) for voltage and frequency fluctuations. The motors can supply their rated torque in both Category A and B. In Category A, the temperature rise is approximately 10 K higher than during normal operation.

Tolerance for electrical data

• Efficiencyηat
  P_rated ≤ 150 kW: - 0.15 x (1 – η)
  P_rated > 150 kW: - 0.10 x (1 – η)
  With η being a decimal number
• Power factor - (1 – cosφ) / 6
  Minimum absolute value: 0.02
  Maximum absolute value: 0.07
• Slip ±20 % (for motors < 1 kW ±30 % is admissible)
• Locked-rotor current +20 %
• Locked-rotor torque -15 % to +25 %
• Breakdown torque -10 %
• Moment of inertia ±10 %

Overload times

According to IEC60034, 1LE0 series motors are designed to with stand overload capacity of 1.5 times rated current for 2 minutes at rated voltage and frequency.

Insulation system

The insulation system of 1LE0 results in high reliability, a long servicelife and high resistance to stress, for example, during starting orunder overload conditions.

1LE0 series motors are designed for temperature class 155 (F). Atrated output with line-fed operation, the motors can be used intemperature class 130 (B).

Motor protection

Motor thermal protection means to use of thermal protectors and thermal detectors incorporated into the stator windings or placed in other suitable positions in motor in order to protect them against serious damage due to thermal overloads.

The order variants for motor protection are coded with letters in the 15th position of the Motor Order No., or ordered with Option code. Some protection method about winding protection and bearing protection are shown in the following.

Winding protection

PTC thermistors protection

The most comprehensive protection against thermal overloading of the motor is provided by PTC thermistors (thermistor motor protection) installed in the motor winding. The temperature of the winding can be accurately monitored thanks to its lowheating capacity and the excellent heat contact with the winding. When

a limit temperature is reached (nominal tripping temperature), the resistance of PTC thermistors will have a step change. This is evaluated by a tripping unit and can be used to open auxiliary circuits.

The PTC thermistors themselves cannot be subjected to high currents and voltages. This would result in destruction of the semiconductor. The switching hysteresis of the PTC thermistor and tripping unit is low, which supports fast restarting of the drive.

Motors with this type of protection are recommended for heavy duty starting, switching duty, extreme changes in load, high ambient temperatures or fluctuating supply systems.

- Motor winding is protected with PTC thermistors with 3 embedded temperature sensors for tripping. Connection be done through 2 auxiliary terminals in the connection box. 15th position of Motor Order No. letter B.

- Motor winding is protected with two sets of three temperature sensors, one set is for warning, another set for tripping. The warning temperature is 145 ºC, and tripping temperature is 155 ºC. Connection be done through 4 auxiliary terminals in the connection box. 15th position of Motor Order No. letter C.

KTY84-130 temperature sensor protection

When 1LE0 with converter fed operation, KTY84-30 is recommended to be configured for winding protection. The following chart show the characteristic of KTY84-30.

Some converters from Siemens determine the motor temperature using the resistance of the temperature sensor. They can be set to a required temperature for alarm and tripping.

1LE0 Motor winding with embedded temperature detector sensor KTY 84-130. Two auxiliary terminals are provided in the connection box. 15th position of Motor Order No. letter F.

PT100 resistance thermometers protection

PT100 thermometers are a high precision, high sensitivity, better linear temperature resistance, more stable performance, and high reliability sensor, whose characteristics are as following.

2 alternatives of PT100

- Installation of 3 PT100 resistance thermometers. Connection be done through 6 auxiliary terminals in the connection box. 15th position of Motor Order No. letter H.

- Installation of 6 PT100 resistance thermometers. Connection be done through 12 auxiliary terminals in the connection box. 15th position of Motor Order No. letter J.

Bearing protection

1LE0 motors bearing has no protection as standard. For some severe application, such as high load, high coolant temperature and etc., the bearing is recommended to be protected. The bearing is protected through thermometers screwed into the bearing plates of motor driven end (DE) and non-drive-end (NDE). The wires are routed through the main connection box.

Installation of 2 PT100 screwed-in resistance thermometers for 1LE0 motor bearings, Option code: Q5A. Connection be done through 4 auxiliary terminals in the connection box.

Anti-condensation heater

Motors whose windings are at risk of condensation due to the climatic conditions, e.g. inactive motors in humid atmospheres or motors that are subjected to widely fluctuating temperatures can be equipped with anti-condensation heaters (Option code: Q04), 2 auxiliary terminals in connection box are needed.”

Anti-condensation heaters must be switched off during operation. When motor shut down, the heaters must be switched on.

Converter fed application

1LE0 motors are suitable for pumps, fans, compressors, texitle machine and mechanical machine applications where variable or constant speed is required.

In application where the motor is driven by a converter, the degree of electrical interference depends on the type of converter used (type, number of IGBTs, interference suppression measures, and manufacturer), cabling, distance and application requirements.

The installation guidelines of the converter manufacturer with regards to electromagnetic compatibility must be considered at all times during the design and implementation phases.

At rated output with converter fed operation, the motors will be used in temperature class 155 (F). To prevent damage as a result of bearing currents, insulated bearings are recommended to be assembled for frame size 250 and above. Please inquire Siemens about the detailed information of insulated bearing.

Converter-fed operation

The standard insulation of the 1LE0 motors is designed such that operation is possible on the converter at mains voltage up to 460 V.

1LE0 motors are capable for converter-fed operation with certain characteristics load, of which the load torque characteristics is referred in the following diagram:

By usage with admissible torque and below, the motor can be operated with self cooling; by usage over the admissible torque line, the motor with forced ventilation is needed.

At operating speeds above rated speed the noise and vibration levels increase and the bearing life time reduce. Attention should be paid to the re-greasing intervals and the grease service life.

For converter-fed operation with frequencies greater than 60 Hz special balancing is required for compliance with the specified limit values.

Voltage withstand levels

The dielectric stress of the winding insulation is determined by:

• the peak voltage, rise time and frequency of the impulses produced by the converter.
• the characteristics and the length of the connection leads between the converter and motor.
• the winding construction and other system parameters, especially the voltages between the different parts of the winding and the ground represent dielectric stress at the insulation system.

The standard insulation of the 1LE0 motors is designed to withstand voltage peak and rise time which is showed in the diagram:

The values refer to standard IEC 60034-17 and GB/T 20161-2008.

Order No. and Motor Type

Foot note:

• ¹⁾ Order other voltages with voltage code 90 and the corresponding Option code (see under "Option") .
• ²⁾ The types of construction IM B6/7/8, IM V6 and IM V5 without protective cover are also possible as long as no condensation drainage holes (Order code: H03) and no stamping of these types of construction on the rating plate are required. As standard, the type of construction IM B3 is then stamped on the rating plate.
• ³⁾ The type of construction is stamped on the rating plate. When
• ordering with condensation drainage holes (order code H03), it is absolutely necessary to specify the type of construction for the exact position of the condensation drainage holes during manufacture.
• ⁴⁾ The types of construction IM V1 and IM V3 without protective
• cover are also possible as long as no condensation drainage holes (Order code: H03) and no stamping of these types of construction on the rating plate are required. As standard, the type of construction IM B5 is then stamped on the rating plate.
• ⁵⁾ The types of construction IM V19 and IM V18 without protective
• cover are also possible as long as no condensation drainage holes (Order code: H03) and no stamping of these types of construction on the rating plate are required. As standard, the type of construction IM B14 is then stamped on the rating plate.
• ⁶⁾ For motor with IM B5, IM V1, IM V3, IM B14, IM V18 and IM V19
• construction and mounting type, the 16th digit of motor order No. must be "4";
• ⁷⁾ Only for FS80 ~ 160.
• ⁸⁾ Without canopy, for protective cover with canopy needed Option code H00.
• ⁹⁾ Cable entry on connection box towards the non-drive.
• ¹⁰⁾ Please specially consult with Siemens.

Order No. example:

IE2, Low voltage three phase cast iron motor

4-pole, 15 kW, IM B5, 380VD/660VY 50 Hz, IP55, connection box on top and cable entry at right side (view from DE), with separately driven fan.

Motor order code: 1LE0001-1DB43-3FA4-Z F70

Technical data table

Options

• ¹⁾ Order No. supplement Z with option code when ordering;
• ²⁾ Without additional charge
• ³⁾ For FS80 ~ 112 motor, R10 only in combination with Option code H08 (Connection box on NDE) possible.
• ^4） Cable entry on connection box towards the non-drive end.
• ⁵⁾ For vertical mounting of FS250~FS355 motor, please specially consult with Siemens.
• ⁶⁾ FS280, FS315 and FS355 motor with the regrease device as standard.
• ⁷⁾ For horizontal mounting motor, insulated bearing located at DE; For vertical mounting motor, insulated bearing located at NDE.
• ⁸⁾ Not possible in combination with canopy or separately driven fan (Order code: F70).
• ⁹⁾ Second standard shaft extension on NDE has allowed output from the next smaller frame size.
• ¹⁰⁾ Only applicable for the construction type IM V5, IM V1, IM V15 and IM V18. Not possible in combination with Option code L05.
• ¹¹⁾ Applicable to motor of horizontal mounting. If vertical mounting motor required to be with condensation drainage holes, please inquiry Siemens specially. If condensation drainage holes are required, it is necessary to order the motors in their respective type of construction.
• ¹²⁾ When the separately driven fan is mounted, the length of the motor increase by 6L. For an explanation of the additional dimension and technical data see from page 8.
• ¹³⁾ Without fan and fan cover, the length of the motor is decrease by 6l. By using the power output of rating plate, the motor must have external cooling by air flow. The correct motor cooling is in responsibility of customer. Missing or wrong cooling reduce the life time or damaged the motor.
• ¹⁴⁾ When SINAMICS inverter is connected with Omron encoder (E6B2- CWZ6C), additional configuration on inverter is needed. For detailed information, please contact with Siemens hotline.
• ¹⁵⁾ Omron encoder (E6B2-CWZ1X) can be directly connected with SINAMICS inverter.
• ¹⁶⁾ Recommended for indoor or outdoor installations exposed to direct weather conditions. Industrial environment with moderate SO2, inshore maritime climate but not offshore.
• ¹⁷⁾ Not applicable for 1LE0 Al motors

Type of construction IM B3

Type of construction IM B35

Type of construction IM B5 and IM V1

Type of construction IM B14