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SIPROTEC-7UT82
Transformer differential protection – SIPROTEC 7UT82
- Stock status:
- Call for availability
- Manufacturer:
- Siemens
- Product code:
- SIPROTEC-7UT82
Main documents
Related products
| Hardware | |
| transformers | 4 current transformers |
| voltage | 0 / 3 voltage transformers |
| Product family | mv digital protection relays power analyzersOther |
| binary inputs | 3 / 7 binary inputs (thresholds configurable using software) |
| Product | |
| binary outputs | 5 / 8 binary outputs (2 changeover) |
| life contact | 1 life contact |
| Pluggable | Pluggable current and voltage terminals. |
| time-overcurrent | Directional time-overcurrent protection, ground (67N) |
| Trip-circuit | Trip-circuit supervision (74TC) |
| Additional Product Information | |
| Forward-power | Forward-power, reverse-power protection (32) |
| Rate-of-voltage | Rate-of-voltage-change protection (27R/59R) |
| Rate-of-frequency | Rate-of-frequency-change protection (81R) |
| programmable | 9 programmable function keys |
| Secondary current transformer values | Secondary current transformer values (1 A / 5 A) settable using DIGSI |
| Binary input | Binary input thresholds settable using DIGSI (3 stages) |
| Pluggable | Pluggable current and voltage terminals |
| frequency | Rate-of-frequency-change protection (81R) |
| voltage | Rate-of-voltage-change protection (27R/59R) |
| reclosing | Automatic reclosing (79) |
| Voltage dependent | Voltage dependent inverse-time overcurrent protection (51V) |
| Directional | Directional intermittent ground fault protection (67Ns) |
Product Description
The SIPROTEC 7UT82 is a dedicated transformer differential protection relay designed specifically for two-winding transformers, offering compactness, cost-effectiveness, and robust functionality. As a main protection device, it also integrates multiple advanced features for backup protection, monitoring, and automation, making it ideal for a wide range of industrial and utility applications.
Key Benefits:
Compact & Economical: Tailored for applications that demand reliable protection in a compact, cost-efficient package.
Comprehensive Protection: Offers a full range of primary and backup protection functions including arc protection, overcurrent, overvoltage, and more.
Easy Engineering & Operation: User-friendly interface, intuitive DIGSI 5 software, and clear single-line display support fast commissioning and maintenance.
High Reliability: Conformal coating on electronic boards ensures reliable operation under harsh environmental conditions.
Advanced Cybersecurity: Complies with NERC CIP and BDEW Whitepaper, supporting RBAC, signed firmware, authenticated network access (IEEE 802.1X), and secure logging.
IEC 61850 Compatibility: Fully compatible with IEC 61850 Editions 1 and 2, including GOOSE messaging and seamless system integration.
Applications:
- Protection of special transformers: Such as phase-shifting transformers, FACTS devices, converter and arc furnace transformers, and HVDC transformers.
- Backup protection: For motor and generator differential protection.
- Protection of short lines and cables.
Protection and Control Functions:
Transformer Differential Protection:
- For two-winding transformers and auto-transformers.
- Includes stabilization features and up to two Restricted Ground-Fault Protection (RGFP) functions.
- Adaptive operate curve based on transformer tap position.
- Supports different degrees of CT saturation and inrush/overexcitation control.
Versatile I/O and Communication:
- Standard variant includes 8 current transformer inputs, 7 binary inputs, and 7 binary outputs.
- Modular structure with IO103 module, 1/3 × 19-inch housing, and options for small or large displays.
Communication & Protocols:
- Built-in RJ45 Ethernet and up to 2 pluggable modules supporting protocols such as IEC 61850-8-1, IEC 60870-5-103/104, Modbus TCP, DNP3, and PROFINET IO.
- Serial protection data transmission over optical fiber, two-wire, or networks (e.g., IEEE C37.94), with automatic ring/chain switchover.
PRP/HSR Support: Redundant communication protocols for uninterrupted data transmission.
Web Interface: Full access to device diagnostics, vector diagrams, and system data via a standard web browser.
Graphical Logic Editor: Custom automation logic creation directly within the device.
Power Quality Monitoring – PQ Basic: Detects voltage imbalance, overvoltage, dips, interruptions, TDD, THD, and harmonics.
Measurement & Fault Recording:
Flexible Measuring Points:
- 2 × 3-phase current measuring inputs
- 2 × single-phase current measuring inputs
Advanced Fault Recording:
- High-speed recording buffer (up to 80 sec at 8 kHz or 320 sec at 2 kHz)
Time Synchronization:
- IEEE 1588 Precision Time Protocol (PTP)
The SIPROTEC 7UT82 combines Siemens’ proven differential protection technology with modern communication capabilities and enhanced cybersecurity features, making it a reliable and future-ready solution for transformer protection in both utility and industrial environments.
Frequently Asked Questions
What is SIPROTEC used for?
✅ SIPROTEC devices, including SIPROTEC 5, are designed for advanced protection, control, monitoring, and measurement in electrical energy systems. With modular hardware, flexible software, and the powerful DIGSI 5 engineering tool, they provide unmatched reliability and efficiency in industrial automation and energy applications.
What is SIPROTEC 4?
✅ SIPROTEC 4 represents Siemens' benchmark in digital protection technology, offering reliable solutions for diverse industrial and energy applications. It remains a trusted choice for safeguarding electrical systems with precision and efficiency.
What is SIPROTEC 5?
✅SIPROTEC 5 is a state-of-the-art protection, automation, and monitoring system developed by Siemens for use in electrical power systems. Designed with modular hardware and software architecture, SIPROTEC 5 devices provide advanced solutions for protection, control, measurement, and system monitoring in medium- and high-voltage networks.
What is Reyrolle?
✅ Reyrolle, originally a British engineering company, revolutionized the power industry by manufacturing innovative switchgear for power stations worldwide. Today, Siemens continues its legacy through the Reyrolle product range, which provides robust and reliable protection relays for modern energy systems.
What is the function of a digital relay?
✅ A digital relay, like Siemens SIPROTEC models, uses advanced microprocessors to analyze power system voltages, currents, and other parameters. These relays detect faults in electrical systems or industrial processes, ensuring efficient protection and control.
What are the disadvantages of a digital relay?
✅ Digital relays, despite their precision and versatility, have some drawbacks. These include susceptibility to electromagnetic interference, higher power consumption, and the need for regular maintenance to avoid contact wear. However, SIPROTEC relays are engineered to mitigate many of these issues, ensuring superior performance and reliability.
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