SIEMENS SIMOTICS 1LE8 series low-volt​age high-power motor

SIEMENS SIMOTICS 1LE8 series low-voltage high-power motor

Product Overview and Core Parameters

1. Series positioning and differences in sub series

The SIMOTICS 1LE8 series is a low-voltage high-power motor developed by Siemens specifically for the Chinese market. Based on a global design platform, it focuses on high reliability and high power density and is divided into two sub series. The core differences are shown in the table below:

Comparison dimension 1LE8003 (universal type) 1LE8033 (frequency conversion specific type)

Core use: General scenario (mainly direct supply, optional frequency conversion) Frequency conversion specific scenario (≤ 690V), suitable for steel, lifting, etc

Insulation usage level: 130 (B) for direct supply, 155 (F) for variable frequency, and 155 (F) for variable frequency operation

Bearing configuration: Deep groove ball/angular contact ball bearings (optional insulated bearings), standard insulated bearings (anti stray current damage)

Temperature protection optional PTC/PT100/PT1000 standard dual group PTC (145 ℃ alarm/155 ℃ trip)

Variable frequency voltage upper limit ≤ 460V ≤ 690V (optional N90 special insulation, no need for variable frequency filter)

2. Core rated parameters (50Hz)

Machine base number, pole number, rated power range (kW), rated speed (rpm), efficiency (4/4 load,%), power factor (4/4 load), weight (IMB3, kg)

315 2 220~315 2978~2982 95.8 0.89~0.91 1380~1590

315 4 220~315 1490~1491 96.0 0.85 1480~1650

315 6 160~250 990~991 95.8 0.85 1370~1700

315 8 132~200 740~741 94.0~94.6 0.80 1320~1690

355 2 355~500 2982~2988 95.8 0.89 2200~2300

355 4 355~500 1490~1491 96.0 0.85~0.87 1960~2290

355 6 280~400 993~994 95.8 0.85 2150~2270

355 8 220~315 743~745 94.6 0.81 2140~2250

Detailed explanation of mechanical characteristics

1. Structure and installation

Machine base and appearance: The machine base material is gray cast iron, standard color RAL7030 (stone gray), supports multiple installation structures (compliant with IEC 60034-7), and the core installation types and codes are as follows:

Installation type code (14th digit of order number) Applicable scenarios

IM B3 A machine base with feet, end cover without flange

IM B35 J machine base with feet, end cover with flange

The IM V1 G machine base does not have feet, and the end cover has a flange

Junction box: standard top mounted (order number 16th digit is 4), rotatable 4 × 90 °, supports upper right (5) and upper left (6) configurations; The 315 machine base contains 2 main inlet holes (M72 × 2), and the 355 machine base contains 3 main inlet holes, all of which are sealed with screw plugs. The maximum number of auxiliary terminals is 24 (L97 auxiliary junction box is required for excess).

2. Bearings and lubrication

Bearing configuration: The standard is deep groove ball bearings (6316 C4 for 315 machine base 2-pole, 6319 C4 for 4-8 pole; 6317 C4 for 355 machine base 2-pole, 6320 C4 for 4-8 pole), and 1LE8033 comes with insulated bearings as standard; The L22 enhanced design (with cylindrical roller bearings on the drive end) is available for high arm suspension scenarios.

Lubrication parameters (horizontal installation, 40 ℃ environment):

Machine base number, pole number, lubrication cycle (h), amount of grease added (g)

315 2 3000 30

315 4 4000 40

315 6/8 6000 40

355 2 3000 30

355 4 4000 60

355 6/8 6000 60

Note: For every 10 ℃ increase in ambient temperature, the lubrication cycle is shortened by 50%.

3. Cooling method

Standard configuration: IC411 self fan cooling (radial centrifugal fan, independent of rotation direction);

Optional: F70 independent drive fan (recommended for low speed/over rated speed to reduce noise), the motor length increases by Δ L after installation (315 base+180mm, 355 base+150mm), and the fan parameters are 220V Δ/380VY, 50Hz, 1100W.

Electrical characteristics and protection

1. Voltage and frequency adaptability

Voltage deviation: Supports deviation between Class A (± 5%) and Class B (± 10%) of IEC 60034-1, with a temperature increase of approximately 10K for Class A and long-term operation not recommended for Class B;

Frequency deviation: Class A ± 2%, Class B+3%/-5%;

Core voltage configuration:

1LE8003：380VΔ/660VY、400VΔ/690VY（50Hz）；

1LE8033: 500V Δ (standard), 690VY (options 0-6).

2. Motor protection

Winding protection: Supports PTC, PT100, PT1000 three types of components, and the selection corresponds to the 15th digit code of the order number:

Protection type code, number of wiring terminals, core parameters

Unprotected A --

Single set PTC (trip 155 ℃) B 2 three core series connection, suitable for heavy-duty starting

Dual group PTC (alarm 145 ℃/trip 155 ℃) C 4 1LE8033 standard configuration

3 2-wire PT100 H 6 with high precision and good linearity

1 2-wire PT1000 K 2 for more accurate temperature monitoring

Bearing protection: optional Q72 (dual ended 2-wire PT100, 4 terminals), Q78 (dual ended 3-wire PT100, 6 terminals), Q79 (dual ended dual supported 3-wire PT100, 12 terminals);

Moisture protection: Options Q04 (1LE8003)/Q02 (1LE8033), 220V, 100W moisture-proof heating belt, works when stopped and closes when running to avoid winding condensation.

3. Characteristics of frequency conversion applications