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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3UF1856-3DA00 |
| Alternative Part Number | 3UF18563DA00 |
| Manufacturer | Siemens |
| Product Designation | Current transformer for overload protection |
| Current at Input (Min) | 100 A |
| Current at Input (Max) | 400 A |
| Secondary Side Current (Max) | 1 A |
| Ratio Input Current/Output Current | 400/1 A |
| Apparent Loss Power (Max) | 7 VA |
| Apparent Loss Power (Min) | 0.5 VA |
| Number of Poles | 3 |
| Reference Code | T (according to DIN 40719 extended according to IEC 204-2 / according to IEC 750) |
| Electrical Connection (Secondary) | Screw-type terminals |
| Electrical Connection (Input) | Flat connector |
| Mounting Type | Screw mounting for mounting on contactors and standalone installations |
| Width | 145 mm |
| Height | 159 mm |
| Depth | 127 mm |
| Protection Class | IP20 |
| Ambient Operating Temperature Range | -25 … +60 °C |
| Certificates/Approvals | General Product Approval for use in hazardous locations, Declaration of Conformity, and other |
| Last Change | Mar 17, 2014 |
The Siemens 3UF1856-3DA00 is a high-precision current transformer designed for three-phase monitoring and overload protection applications. This robust component is engineered to be mounted onto a contactor and can be installed as a single unit, ensuring a streamlined integration into various industrial systems. With an input current range of 100A to 400A and a secondary side maximum of 1A, it offers a ratio of input current to output current of 400/1 A, making it suitable for a wide range of operational demands.
The transformer is characterised by its minimal apparent loss power, ranging from a mere 0.5 VA to a maximum of 7 VA, which highlights its efficiency in energy usage. It features a three-pole design and adheres to the DIN 40719, IEC 204-2, and IEC 750 standards for reference codes, as well as the DIN EN 61346-2 standard. The mechanical design includes screw-type terminals for the secondary side and flat connectors for the input, facilitating a secure and reliable electrical connection.
Designed for screw mounting, the Siemens 3UF1856-3DA00 is versatile for both mounting on contactors and standalone installations. Its compact dimensions, with a width of 145 mm, height of 159 mm, and depth of 127 mm, along with a protection class of IP20, make it suitable for a variety of industrial environments. The transformer can operate within an ambient temperature range of -25°C to +60°C, ensuring reliable performance under diverse operating conditions.
This current transformer is a testament to Siemens' commitment to quality and reliability, making it an essential component for industrial control systems that require precise current measurement and protection.
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Frequently Asked Questions
What is the primary use of this current transformer?
This current transformer is designed for overload protection in electrical circuits. It's typically used in conjunction with contactors for monitoring and managing the current flow in three-phase power systems.
Can this transformer be mounted onto any contactor?
It is specifically designed for mounting onto contactors and can be installed as a single unit, but it's important to ensure compatibility with the contactor in use. It's advisable to check the specifications of both the contactor and the transformer for a proper fit.
What is the current transformation ratio of this device?
The current transformation ratio of the 3UF1856-3DA00 is 400/1 A, meaning it can transform a primary current of up to 400 A into a secondary current of 1 A.
What are the ambient operating temperature limits for this transformer?
The transformer can operate within an ambient temperature range of -25°C to +60°C, making it suitable for a variety of industrial environments.
What type of electrical connections does this transformer support?
On the secondary side, it features screw-type terminals for secure connections, while the input side is designed for flat connector use.
What is the protection class of this current transformer?
The protection class for this current transformer is IP20, indicating that it has protection against solid objects larger than 12.5 mm but not against water.
How many poles does this current transformer have?
This current transformer has three poles, aligning with its use in three-phase electrical systems.
What are the dimensions of this current transformer?
The dimensions are 145 mm in width, 159 mm in height, and 127 mm in depth, which should be considered when planning for installation space.
Does this current transformer have any certifications or approvals?
Yes, it has general product approvals for use in hazardous locations, along with other declarations of conformity.
What is the apparent loss power range for this transformer?
The apparent loss power for this transformer ranges from a minimum of 0.5 VA to a maximum of 7 VA.
