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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RK1303-6DS74-3AA3 |
| Alternative Part Number | 3RK13036DS743AA3 |
| Manufacturer | Siemens |
| Mounting Type | DIN Rail Mount |
| Dimensions | 130 x 250 x 125 mm |
| Product Design | Reversing starter |
| Bus-Communication | Yes, with PROFIBUS DP protocol support |
| Motor Protection | Full motor protection with electronic switching and thermal overload protection |
| Operating Voltage | 400 V to 500 V (rated value) |
| Service Power | At AC-3, 400 V: 5.5 kW (rated value) |
| Suitable for Three-Phase Motors | Yes, at 400 V, 50 Hz: 0.9 kW (min) to 5.5 kW (max) |
| Control Circuit Voltage | DC, 20.4 V (min) to 28.8 V (max) |
| Adjustable Response Current | 2.4 A (initial value) to 12 A (final value) |
| Breaking Capacity | Short-circuit current (lcu) at 400 V: 100 kA (rated value) |
| Connection Type | Tab terminals for main current circuit |
| Protection Class | IP65 |
| Ambient Operating Temperature | -20°C to +40°C |
| Certificates/Approvals | General Product Approval, Declaration of Conformity, Type Test Certificates/Test Report, other |
The Siemens 3RK1303-6DS74-3AA3 is a robust motor starter designed for seamless integration into industrial automation systems. This DIN rail mountable unit is engineered to provide full motor protection with a solid-state switching contact and fuse-based short-circuit protection. It supports a three-phase 400 V power supply and is capable of handling motors with a service power rating of up to 5.5 kW at AC-3, making it suitable for a wide range of applications.
Featuring an adjustable response current ranging from 2.40 A to 12.00 A, the device ensures precise control and protection for connected motors. The motor starter also includes an outlet for an engine brake, enhancing its functionality in applications requiring rapid stopping of motor operations.
With a compact footprint of 130 x 250 x 125 mm, the Siemens 3RK1303-6DS74-3AA3 is designed for space-saving installations while offering easy access to tab terminals for the main current circuit. It operates within an ambient temperature range of -20 to +40°C and boasts an IP65 protection class, ensuring durability and reliable performance in demanding industrial environments.
The unit's compatibility with PROFIBUS DP protocol allows for efficient bus communication, facilitating integration into existing networks and enabling centralised control. This feature streamlines processes and contributes to system optimisation.
Overall, the Siemens 3RK1303-6DS74-3AA3 motor starter is a high-quality component that offers reliability, efficiency, and advanced protection for industrial motors, making it a valuable addition to any automation system.
Commonly Asked Questions
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Frequently Asked Questions
What is the function of this motor starter?
The Siemens motor starter is designed for electronically switching motors and provides full motor protection with a solid-state design. It's suitable for reversing starter applications and includes a brake contact and overload protection.
Can this motor starter be used with a bus communication system?
Yes, this motor starter supports bus communication and is compatible with the PROFIBUS DP protocol, allowing for integration into automated systems.
What type of motor protection does this starter offer?
It offers full motor protection, ensuring that the motor is safeguarded against potential electrical faults and thermal overloads.
What are the voltage requirements for the control circuit of this starter?
The control circuit operates on DC voltage, with a rated control supply voltage minimum of 20.4 V and a maximum of 28.8 V.
What is the operating voltage range for the main circuit?
The main circuit has an operating voltage rated value with a minimum of 400 V and a maximum of 500 V.
What is the service power capacity of this motor starter?
The service power capacity at AC-3, at 400 V, is rated at 5.5 kW, making it suitable for three-phase servomotors between 0.9 kW and 5.5 kW at 400 V and 50 Hz.
What is the ambient operating temperature range for this device?
The motor starter can operate within an ambient temperature range of -20°C to +40°C.
What is the protection class of this motor starter?
This device is rated with a protection class of IP65, indicating a high level of protection against dust ingress and low-pressure water jets from any direction.
How can the motor starter be mounted?
The motor starter is designed for DIN Rail mounting, facilitating easy installation and integration into electrical cabinets and control panels.
What certifications does this motor starter have?
It comes with a general product approval and a declaration of conformity, ensuring compliance with relevant industry standards.
