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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3UF1868-3GA00 |
| Alternative Part Number | 3UF18683GA00 |
| Manufacturer | Siemens |
| Product Designation | Current transformer for overload protection |
| Current at Input (Min) | 205 A |
| Current at Input (Max) | 820 A |
| Current at Output (Max) | 1 A |
| Ratio Input/Output Current | 820/1 A |
| Apparent Loss Power (Max) | 25 VA |
| Apparent Loss Power (Min) | 1.6 VA |
| Number of Poles | 3 |
| Protection Class IP | IP20 |
| Ambient Temperature (Operating) | -25 … +60 °C |
| Mounting Type | Screw mounting for mounting on contactors and stand-alone installations |
| Height | 195 mm |
| Width | 230 mm |
| Depth | 170 mm |
| Electrical Connection (Input) | Flat connector |
| Electrical Connection (Output) | Screw-type terminals |
| Approvals | General Product Approval for use in hazardous locations; Declaration of Conformity; other |
| Reference Code | According to DIN EN 81346-2, IEC 81346-2: T |
The Siemens 3UF1868-3GA00 is a high-precision current transformer designed for industrial applications requiring reliable overload protection. This three-phase transformer is engineered for direct mounting onto contactors, as well as for standalone installations, offering versatility in integration with existing systems. With an input current range of 205 to 820 A and a secondary maximum current of 1 A, it ensures accurate current measurement and transformation across a wide operational spectrum.
Constructed to withstand challenging environments, the 3UF1868-3GA00 operates effectively within an ambient temperature range of -25 to +60 °C, making it suitable for a variety of industrial settings. The transformer boasts a compact design with dimensions of 195 mm in height, 230 mm in width, and 170 mm in depth, allowing for efficient use of space within electrical cabinets.
Safety and compliance are paramount, and this current transformer meets stringent standards with a General Product Approval for use in hazardous locations. Its robust build quality is complemented by a protection class of IP00, ensuring the internal components are safeguarded against contact and foreign objects.
The Siemens 3UF1868-3GA00 is a testament to precision engineering, offering a measuring precision for current measurement of +/- 3% within its specified range. This level of accuracy is critical for systems that depend on precise current monitoring to maintain operational efficiency and safety.
In summary, the Siemens 3UF1868-3GA00 current transformer is an essential component for industrial applications demanding accurate current measurement and reliable performance in demanding conditions. Its robust construction, precise operation, and flexible installation options make it a valuable addition to any electrical protection system.
Commonly Asked Questions
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Frequently Asked Questions
What is the purpose of this current transformer?
The Siemens 3UF1868-3GA00 is a current transformer designed for overload protection. It is used to transform high primary currents (up to 820 A) to a lower, more manageable secondary current (1 A), allowing for accurate current monitoring and protection of electrical systems.
Can this current transformer be used in hazardous locations?
Yes, the Siemens 3UF1868-3GA00 has a general product approval for use in hazardous locations. It is suitable for applications where safety and reliability in such environments are paramount.
What are the mounting options for this current transformer?
This current transformer is designed for screw mounting, either on contactors or as a stand-alone installation, providing flexibility in various application setups.
What is the operating temperature range for this current transformer?
The operating temperature range for the Siemens 3UF1868-3GA00 is between -25°C and +60°C, ensuring reliable performance across a wide range of ambient conditions.
What type of electrical connections does this current transformer support?
The Siemens 3UF1868-3GA00 features a flat connector for input and screw-type terminals for the secondary side, facilitating easy and secure connections.
What is the accuracy of the current measurement with this transformer?
The current measurement accuracy of the Siemens 3UF1868-3GA00 is within +/- 3% in the range of 205 A to 4920 A at 50/60 Hz and 25°C, ensuring precise current monitoring for protection purposes.
How many poles does the main current circuit of this transformer have?
The main current circuit of the Siemens 3UF1868-3GA00 has three poles, aligning with standard three-phase electrical systems.
What is the IP protection class of this current transformer?
The Siemens 3UF1868-3GA00 has an IP protection class of IP00, indicating that it does not have special protection against the ingress of solid objects or water and should be installed in a suitable enclosure for protection.
What is the significance of the transformer's ratio input current to output current?
The ratio input current to output current of 820/1 A for the Siemens 3UF1868-3GA00 signifies that for every 820 A flowing through the primary circuit, 1 A will flow through the secondary circuit, which is used for monitoring and protection.
Is there any specific compliance or certification for this current transformer?
The Siemens 3UF1868-3GA00 comes with a general product approval and may have other certifications or declarations of conformity. It is advisable to check the specific compliance requirements for your application.
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