The SIPROTEC 7UM62 is a high-performance multifunctional numerical protection relay developed by Siemens, designed for generators, motors, and transformers in medium and high-voltage power systems. Built on advanced digital signal processing technology, it integrates over 30 protection functions, including overcurrent, differential, earth fault, reverse power, and thermal overload protection, to address nearly all common faults in rotating machinery and transformers. With configurable analog inputs (4 current + 4 voltage channels) and 7 binary inputs / 12 binary outputs, it supports flexible adaptation to diverse system configurations. The relay offers a wide-range auxiliary power supply (24–250 V DC / 80–250 V AC) and a robust industrial design with IP40 front protection, ensuring reliable operation in harsh environments from -25 °C to +70 °C. It supports multiple communication protocols including IEC 60870-5-103, MODBUS RTU, and PROFIBUS-DP, enabling seamless integration into SCADA and substation automation systems. Compliant with IEC 60255 and IEEE C37.90 standards, it delivers high-precision measurement, fast fault response, and long-term operational stability.
| Parameter Category | Specification Details |
|---|---|
| Basic Identification | |
| Order Number | 7UM6211-2BB02-0AA0/EE |
| Product Family | SIPROTEC 4 7UM62 Multifunctional Machine Protection Relay |
| Type | Generator/Motor/Transformer Numerical Protection Device |
| Manufacturer | Siemens AG |
| Application Scope | Protection for small/medium generators, motors, and transformers |
| Mechanical & Enclosure | |
| Form Factor | 1/2 19″ rack-mountable unit, surface mounting case |
| Terminal Arrangement | Top and bottom terminals |
| Protection Class (Front) | IP40 (IEC 60529) |
| Protection Class (Terminals) | IP20 (IEC 60529) |
| Dimensions (W×H×D) | 105 mm × 177.5 mm × 215 mm (typical for 1/2 19″ format) |
| Weight | Approx. 2.5 kg |
| Operating Temperature Range | -25 °C to +70 °C |
| Storage Temperature Range | -40 °C to +85 °C |
| Relative Humidity | 5% to 95% (non-condensing, IEC 60068-2-30) |
| Electrical Specifications | |
| CT Rated Primary Current | 1 A (sensitive type, IEE) |
| Rated Frequency | 50 / 60 Hz (auto-sensing) |
| Auxiliary Supply Voltage | 24–250 V DC / 80–250 V AC (wide-range power supply) |
| Power Consumption | < 15 W (typical) |
| Analog Inputs | 4 current inputs, 4 voltage inputs (configurable) |
| Binary Inputs (BI) | 7 galvanically isolated binary inputs |
| Binary Outputs (BO) | 12 binary outputs (including 1 watchdog contact) |
| Relay Contact Rating | 250 V AC / 220 V DC, 5 A (resistive load) |
| Protection Functions (Key) | |
| Overcurrent Protection | ANSI 50/51 (definite/inverse time), 51V (voltage-controlled) |
| Earth Fault Protection | ANSI 51N/51G (directional/non-directional) |
| Differential Protection | Generator/transformer differential (ANSI 87G/87T) |
| Thermal Overload Protection | ANSI 49 (I²t characteristic, motor/generator thermal modeling) |
| Voltage/Frequency Protection | ANSI 27/59 (undervoltage/overvoltage), ANSI 81 (under/overfrequency) |
| Reverse Power Protection | ANSI 32R (for generators) |
| Motor Starting Protection | Stall/locked rotor, unbalanced current protection (ANSI 46/50BF) |
| Communication & Interfaces | |
| Standard Protocols | IEC 60870-5-103, MODBUS RTU, PROFIBUS-DP (optional) |
| Optional Protocols | IEC 61850 (with additional modules), DNP3.0 |
| Front Panel Interface | RS232 service port for local configuration |
| Configuration Tool | DIGSI 4 / DIGSI 5 software |
| Environmental & Compliance | |
| Electromagnetic Compatibility (EMC) | Compliant with IEC 61000-4-2/3/4/5/6/8/11 |
| Approvals | CE, UL, CSA, KEMA, GOST, IECEx (where applicable) |
| Standards Compliance | IEC 60255, IEC 61850, IEEE C37.90 |
| Order Code Decoding | |
| 7UM6211 | Base device: SIPROTEC 4 7UM62, basic variant with standard protection functions |
| -2BB02 | Enclosure (1/2 19″), 7BI/12BO, 1 watchdog contact, top/bottom terminals |
| -0AA0 | Standard version, no additional options |
| /EE | Software/hardware variant suffix (regional/function-specific configuration) |
- CT Compatibility: The unit is calibrated for 1A secondary current transformers (sensitive IEE type), suitable for high-precision earth fault and differential protection applications.
- Binary I/O Flexibility: 7 binary inputs and 12 binary outputs support flexible mapping of protection signals, interlocks, and control commands to match specific system requirements.
- Communication Integration: The device supports multiple industrial protocols, enabling seamless integration into SCADA, DCS, and substation automation systems for remote monitoring and control.
- Environmental Robustness: The wide operating temperature range and high EMC immunity ensure reliable performance in harsh industrial and power plant environments.
