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Siemens
3RA2435-8XF32-1AG2
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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RA2435-8XF32-1AG2 |
| Alternative Part Number | 3RA24358XF321AG2 |
| Manufacturer | Siemens |
| Product Type | Contactor assembly for star-delta (wye-delta) start |
| Size | S2 |
| Poles | 3-pole |
| Control Supply Voltage (AC) | 110 V at 50/60 Hz |
| Operating Voltage (AC-3) | Maximum 690 V |
| Operating Current (AC-3 at 400 V) | 80 A |
| Operating Power (AC-3 at 400 V) | 37 kW |
| Operating Frequency (AC-3) | Maximum 1,000 1/h |
| Mechanical Service Life | Typical 10,000,000 operating cycles |
| Installation Altitude | Maximum 2,000 m above sea level |
| Ambient Temperature (Operation) | -25 ... +60 °C |
| Ambient Temperature (Storage) | -55 ... +80 °C |
| Auxiliary Contacts | 3 NO + 3 NC integrated |
| Shock Resistance (Rectangular Impulse) | At AC 11.8g / 5 ms, 7.4g / 10 ms |
| Shock Resistance (Sine Pulse) | At AC 18.5g / 5 ms, 11.6g / 10 ms |
| Protection Class IP | IP20 on the front |
| Mounting Position | +/-180° rotation possible on vertical mounting surface; can be tilted +/- 22.5° |
| Fastening Method | Screw fixing |
| Dimensions (H x W x D) | 142 mm x 177.5 mm x 223 mm |
| Required Spacing | Forwards/Backwards/Upwards/Downwards/Side: 10 mm; For live parts: 10 mm |
| Electrical Connection | Screw-type terminals for main, auxiliary, and control circuit |
| Conductor Cross-Sections (Main Contacts) | Solid: 2x (1 ... 35 mm²), 1x (1 ... 50 mm²); Finely stranded with core end processing: 2x (1 ... 25 mm²), 1x (1 ... 35 mm²) |
| Conductor Cross-Sections (Auxiliary Contacts) | Solid or stranded: 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²); Finely stranded with core end processing: 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Safety Related Data (B10 Value) | With high demand rate according to SN 31920: 1,000,000 |
| Safety Related Data (Failure Rate) | With low demand rate according to SN 31920: 100 FIT |
| Safety Related Data (T1 Value) | For proof test interval or service life according to IEC 61508: 20 years |
The Siemens 3RA2435-8XF32-1AG2 is a meticulously engineered contactor assembly designed for star-delta (wye-delta) starting applications. This robust component is rated for AC-3 usage at 37 kW/400 V and is equipped with a control supply voltage of 110 V AC at both 50/60 Hz. It features a three-pole design and is housed in a size S2 frame with screw terminals for secure and reliable connections.
Crafted for durability and longevity, the contactor assembly boasts an impressive mechanical service life, typically offering 10 million operating cycles. It is also designed to withstand challenging environmental conditions, with an operational temperature range of -25 to +60 °C and storage temperature capabilities from -55 to +80 °C. The unit can be installed at altitudes up to 2000 metres above sea level without compromising its performance.
The main current circuit consists of three poles with three normally open (NO) contacts and no normally closed (NC) contacts, supporting an operating voltage up to a maximum of 690 V at AC-3. The operational current at AC-3 is rated at 80 A for 400 V, ensuring it can handle significant power loads.
For added safety and functionality, the contactor assembly includes an integrated electrical and mechanical interlock and three NO + three NC integrated auxiliary contacts. These auxiliary contacts are designed to provide reliable switching with less than one error per 100 million operating cycles, highlighting the unit's exceptional reliability.
The Siemens 3RA2435-8XF32-1AG2 is a testament to Siemens' commitment to quality, reliability, and innovation in automation and control technology. It is an ideal choice for professionals seeking a high-performance solution for motor control applications in industrial settings.
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Frequently Asked Questions
What is the purpose of this contactor assembly?
The contactor assembly is designed for star-delta (wye-delta) starting of motors, which is a method used to reduce the inrush current during the starting of a motor. It is suitable for controlling AC motors with a power rating of 37 kW at 400 V.
Can this contactor assembly be used in different environmental conditions?
Yes, it is designed to operate within a range of ambient temperatures from -25°C to +60°C and can be stored in temperatures ranging from -55°C to +80°C. It is also suitable for installation at altitudes up to 2000 metres above sea level.
What are the main circuit specifications of this contactor assembly?
The main circuit of the contactor assembly has 3 poles with 3 normally open (NO) contacts for the main contacts. It can operate at a maximum voltage of 690 V AC-3 and has an operational current rating of 80 A at 400 V AC-3.
What type of terminals does this contactor assembly have for wiring?
The contactor assembly features screw-type terminals for both the main current circuit and the auxiliary and control circuit, allowing for secure and reliable connections.
What is the mechanical service life of this contactor assembly?
The mechanical service life of the contactor is typically 10 million operating cycles, which indicates its durability and reliability over time.
How is the contactor assembly protected against short circuits?
For short-circuit protection of the main circuit, a type gG NH fuse with a rating of 160 A for type of coordination 1, or 80 A for type of assignment 2, is required. For the auxiliary switch, a gG fuse with a rating of 10 A is necessary.
What are the dimensions and mounting options for this contactor assembly?
The contactor assembly has a height of 142 mm, a width of 177.5 mm, and a depth of 223 mm. It can be mounted with a +/-180° rotation on a vertical mounting surface and can be tilted forward and backward by +/- 22.5°.
What is the control supply voltage for this contactor assembly?
The control supply voltage for the contactor assembly is rated at 110 V AC, with an operating range factor of 0.8 to 1.1 at 50 Hz and 0.85 to 1.1 at 60 Hz.
Does this contactor assembly have auxiliary contacts?
Yes, it includes 3 normally closed (NC) and 3 normally open (NO) auxiliary contacts for instantaneous actions.
Is there any specific certification or approval for this contactor assembly?
The contactor assembly has general product approvals and declarations of conformity, but for specific certifications, please refer to the product documentation or contact your local Siemens office for the latest information.
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