SIPROTEC 4 7UM611/612
Multifunction generator and motor protection relay
- Description
- Function overview
The SIPROTEC 4 7UM61 protection relay can do more than just protect. They also offer numerous additional functions. Be it earth faults, short-circuits, overloads, overvoltage, overfrequency or underfrequency, protection relays assure continued operation of power stations. The SIPROTEC 4 7UM61 protection relay is a compact unit which has been specially developed and designed for the protection of small and medium-sized generators. They integrate all the necessary protection functions and are particularly suited for the protection of
- Hydro and pumped-storage generators
- Co-generation stations
- Private power stations using regenerative energy sources such as wind or biogases
- Diesel generator stations
- Gas-turbine power stations
- Industrial power stations
- Conventional steam power stations.
The flexible communication interfaces are open for modern communication architectures with the control system.
The integrated programmable logic functions (continuous function chart CFC) offer the user high flexibility so that adjustments can easily be made to the varying power station requirements, on the basis of special system conditions.
The device can also be used for protecting synchronous and asynchronous motors.
Basic version
- Stator earth-fault protection
- Sensitive earth-fault protection
- Stator overload protection
- Overcurrent-time protection (either definite-time or inverse-time)
- Definite-time overcurrent-time protection, directional
- Undervoltage and overvoltage protection
- Underfrequency and overfrequency protection
- Reverse power protection
- Overexcitation protection
- External trip coupling
Standard version
Scope of basic version plus:
- Forward-power protection
- Underexcitation protection
- Negative-sequence
- protectionBreaker failure protection
Full version
Scope of standard version plus:
- Inadverdent energization protection
- 100 % - stator earth-fault protection with 3 rd harmonic
- Impedance protection
Asynchronous motor
Scope of standard version plus:
- Motor starting time supervision
- Restart inhibit (without underexcitation protection)
Communication interfaces
- System interface (IEC 60870-5-103 protocol; PROFIBUS DP; MODBUS RTU; DNP 3.0)
Monitoring functions
- Trip circuit supervision
- Fuse failure monitor
- Operational measured values V , I , f , ...
- Every metering value W p , W q
- Time metering of operation hours
- Self-supervision of relay
- 8 oscillographic fault records