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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RT1056-6NF36 |
| Manufacturer | Siemens |
| Type | Power Contactor |
| Control Supply Voltage | 96 to 127 V ac/dc |
| Operating Power at AC-3 | 90 kW at 400 V |
| Operating Current at AC-1 | 215 A at 400 V |
| Number of Poles | 3 Poles |
| Size | S6 |
| Auxiliary Contacts | 2 NO (Normally Open) + 2 NC (Normally Closed) |
| Connection Type | Busbar connections, screw terminal |
| Operating Frequency | Maximum 800 1/h at AC-1, 750 1/h at AC-3 |
| Mechanical Service Life | Typical 10 million switching cycles |
| Operating Voltage at AC-3 | Maximum 1000 V |
| Operational Current at AC-3 | 185 A at 400 V |
| Short-Circuit Protection | gG: 355 A (690 V, 100 kA) for main circuit, gG: 10 A (500 V, 1 kA) for auxiliary switch |
| Mounting Position | Vertical mounting surface +/-90° rotatable, +/- 22.5° tiltable |
| Mounting Type | Screw fixing |
| Dimensions (H x W x D) | 172 mm x 120 mm x 170 mm |
| Required Spacing | Forwards 20 mm, Upwards 10 mm, Downwards 10 mm, At the side 10 mm (for live parts) |
| Protection Class IP | IP00; IP20 with box terminal/cover |
| Ambient Operating Temperature | -25 to +60 °C |
| Installation Altitude | Maximum 2000 m above sea level |
| Shock Resistance | At AC 8.5g / 5 ms, 4.2g / 10 ms; At DC 8.5g / 5 ms, 4.2g / 10 ms |
| Surge Voltage Resistance | Main circuit rated value 8 kV, Auxiliary circuit rated value 6 kV |
| Product Approvals | General Product Approval EMC |
The Siemens 3RT1056-6NF36 is a robust power contactor designed to handle high current applications with ease. This contactor is engineered for AC-3 utilisation categories, making it suitable for starting and stopping AC motors. It boasts an impressive operational current of 185 A and can manage motor power up to 90 kW at 400 V in AC-3 applications, ensuring reliable performance in demanding industrial environments.
Crafted with three poles and equipped with both normally open (NO) and normally closed (NC) auxiliary contacts, this contactor offers flexibility for various control circuit configurations. The device operates with a control supply voltage range of 96 to 127 V ac/dc, which, combined with its electronic drive and PLC interface, integrates seamlessly into a wide range of control systems.
The Siemens 3RT1056-6NF36 is designed with busbar connections and a screw terminal, facilitating straightforward installation and maintenance. Its compact dimensions allow for efficient use of space inside electrical cabinets, while the option for side-by-side mounting provides additional installation versatility.
With a mechanical service life of up to 10 million switching cycles, this contactor is built to last, ensuring long-term reliability and reduced maintenance requirements. Its operational temperature range from -25 to +60 °C allows it to function effectively in various working conditions, further enhancing its suitability for a wide range of industrial applications.
Overall, the Siemens 3RT1056-6NF36 power contactor is a high-quality component that offers dependable performance for controlling motors and other electrical loads in industrial settings.
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Frequently Asked Questions
What are the voltage specifications for this power contactor?
The power contactor operates at a control supply voltage of 96 to 127 V ac/dc, suitable for a variety of industrial applications.
Can this contactor be used for controlling motors?
Yes, it is designed for AC-3 applications and can handle up to 185 A, making it suitable for controlling motors up to 90 kW / 400 V.
What is the size and pole configuration of this contactor?
This contactor is a Size S6 and has a 3-pole configuration, which is standard for many power distribution and motor control applications.
What are the auxiliary contact specifications?
The contactor comes with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, providing flexibility for signalling and interlocking circuits.
How can this contactor be mounted?
It is designed for screw fixing and can be mounted with a vertical mounting surface, which is rotatable up to +/-90° and tiltable +/- 22.5° to the front and back.
What is the mechanical service life of this contactor?
The mechanical service life of the contactor is typically 10 million switching cycles, ensuring long-term reliability in operation.
Is there any protection against short circuits?
Yes, the contactor is designed with short-circuit protection and requires specific fuse links for coordination types 1 and 2, as detailed in the datasheet.
What are the dimensions of this contactor?
The dimensions are 172 mm in height, 120 mm in width, and 170 mm in depth, which should be considered when planning the installation space.
What is the operating frequency of this contactor?
The operating frequency varies depending on the application, with a maximum of 800 operations per hour for AC-1 and 750 operations per hour for AC-3.
Does this contactor have a surge suppressor?
Yes, it includes a varistor for surge suppression, which helps to protect the contactor and connected equipment from voltage spikes.
