Motor protection
KTY 84 temperature sensor
Order codes
A23: 1 x KTY 84-130
A25: 2 x KTY 84-130
This sensor is a semi-conductor that changes its resistance depending on temperature in accordance with a defined curve.
KTY 84 temperature sensor
For 1LA8 motors, the PTC thermistors supplied as standard are omitted when ordering with order codeA23.
For line-fed operation, the temperature monitoring device 3RS10 that is part of the protection equipment can be ordered separately. For further details, see Catalog LV 1.
Motor protection for explosion-proof motors
The explosion-proof motors for Zones 2, 21 and 22 for converter-fed operation (ordered with order codesM73, M38 orM39) already have PTC thermistors for tripping as standard. For converter-fed operation, thermistors can be additionally ordered for alarm (order codeA10).
For the explosion-proof motor series of Zone 1 with type of protection “d”, order codesA15 andA16are available specially for converter-fed operation:
Order codeA15: Motor protection with PTC thermistors for converter-fed operation with 3 or 4 embedded temperature sensors for tripping.
Order codeA16: Motor protection with PTC thermistors for converter-fed operation with 6 or 8 embedded temperature sensors for alarm and tripping.
Rating plate data for motors operating with frequency converters for Zones 2, 21 and 22
“MICROMASTER DUTY S9” is stamped on the rating plate as standard, i.e. the rating data for the MICROMASTER converter series from Siemens are indicated. For other converter types (SIMOVERT MASTERDRIVES, SINAMICS G110, SINAMICS S120 or SIMATIC ET 200S FC), the converter type required must be specified in the order in plain text following the order codeY68. This is due to the different degree of utilization of the converter and the resulting derating of the motor.
Storage
For converter-fed operation with frame size 225 and above, it is recommended that an “Insulated bearing cartridge” - Order codeL27 is used.
Ventilation/noise generation
The fan noise can increase at speeds that are higher than the rated speed of self-ventilated motors.
To increase motor utilisation at low speeds, it is recommended that forced-air cooled motors are used, in particular motor series 1LA5, 1LA7, 1LG4 and 1LG6 with order codeG17 or motor series 1PQ8.
Insulation
For converter-fed operation with the outputs specified in the catalog, the motors are used according to temperature class F, i.e. in this case neither a service factor >1 nor an increased coolant temperature is possible, that is, order codesC11, C12 andC13cannot be ordered. Explosion-proof motors for Zones 2, 21 and 22 are utilized in accordance with temperature class 130 (B).
Supply frequencies larger than 60 Hz
For converter-fed operation with frequencies greater than 60 Hz, special balancing is required for compliance with the specified limit values (plain text: Max. speed).
ECOFAST motor connectors
In combination with the ECOFAST versions of the MICROMASTER 411 distributed drive solutions, the following motor connectors can be ordered separately:
- ECOFAST motor connector, standard (unshielded connection): Order codeG55.
- ECOFAST motor connector, EMC (shielded connection): Order codeG56.
Shielded motor connection cables must be used for frequency converters and soft starters.
Maximum admissible line voltage on motor connector: ?500 V
Ordering example:
Selection criteria |
Requirement |
Structure of the Order No. |
|---|---|---|
Motor type |
Standard motor with high efficiency (EFF1), IP55 degree of protection, aluminum housing |
1LA9 ???-????? |
No. of poles/speed |
4-pole/1500 rpm |
1LA9 090-4KA90 |
Rated output |
1.1 kW | |
Special voltage and frequency |
Star/delta starting for a supply voltage 400 V?, 50 Hz 1) | |
Type of construction |
IM B3 |
|
ECOFAST connector |
Shielded connection |
1LA9 090-4KA90 – Z |
1) Note: Voltage code9 with order codeL1Umust be selected due to the 400 V voltage. With voltage code 6 (= 400 V?/690 VY, 50 Hz), temporary voltage peaks of 690 V can arise which can cause faults on the ECOFAST connectors.
Converter mounting
Motor series 1LA7 with standard insulation up to 500 V in sections “Standard motors up to frame size 315 L” and “Fan motors” can be prepared for mounting an MMI (MICROMASTER Integrated). Order codeH15is required for this purpose.
Earth brushes for converter-fed operation
Earth brushes are available for converter-fed operation for 1LG4 and 1LG6 motors with order codeM44. Please contact your local Siemens office for advice.
Motor series with special insulation up to 690 V
For motor series 1LA7/5 and 1LG6 with special insulation up to 690 V, the following special versions are generally not possible:
Description |
Order code |
|---|---|
With PTC thermistors for alarm for converter-fed operation in Zones 2, 21 and 22 |
A10 |
Temperature detectors for tripping |
A31 |
Installation of 3PT 100 resistance thermometers |
A60 |
Installation of 6PT100 resistance thermometers in stator winding |
A61 |
Temperature class 155 (F), used acc. to 155 (F), with service factor (SF) |
C11 |
Temperature class 155 (F), used acc. to 155 (F), with increased output |
C12 |
Temperature class 155 (F), used acc. to 155 (F), with increased coolant temperature |
C13 |
Temperature class 108 (H) at rated output and max. CT60 °C |
C18 |
Increased air humidity/temperature with 30 to 60 g water per m3 of air |
C19 |
Increades air humidity /temperature with 60 to 100 g water per m3 of air |
C26 |
Design according to UL with “Recognition Mark” |
D31 |
Canadian regulations (CSA) |
D40 |
Prepared for mounting the MICROMASTER Integrated frequency converter |
H15 |
Design for Zone 21, as well as Zone 22 for conducting dust (IP65) for mains-fed operation |
M34 |
Design for Zone 22 for non-conducting dust (IP55) |
M35 |
Design for Zone 21, as well as Zone 22 for conducting dust (IP65) for converter-fed operation, derating |
M38 |
Design for Zone 22 for non-conducting dust (IP55) |
M39 |
Design for Zone 2 for mains-fed operation Ex nA II T3, EEx nA II T3 acc. to IEC/EN 60079-15 |
M72 |
Design for Zone 2 for converter-fed operation, derating Ex nA II T3, EEx nA II T3 acc. to IEC/EN 60079-15 |
M73 |
Temperature class F, used acc. to F, other requirements |
Y52 |
ECOFAST motor connector Han-Drive 10e |
G55 |
ECOFAST motor connector EMC Han-Drive 10e |
G56 |
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