Generator/Motor Protection
General Information
- Description
The SIPROTEC relays are specially designed to protect power generation systems. With their wide range of functions, SIPROTEC relays can be used in any type of power plant - from unit-type district heating stations, through plants based on renewable energies to conventional steam power plants. As user of our SIPROTEC protective relays you can also benefit from our extensive experience.
Our Portfolio (13)
7UM611/612
Multifunction generator and motor protection relay
- Description
- Function overview
The SIPROTEC 4 7UM61 protection relays 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 device can also be used for protecting synchronous and asynchronous motors.
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 flexible communication interfaces are open for modern communication architectures with the control system.
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 protection
- Breaker failure protection
Full version - Scope of standard version plus:
- Inadverdent energization protection
- 100%- stator earth-fault protection with 3rd harmonic
- Impedance protection
Asynchronous motor - Scope of standard version plus
- Motor starting time supervision
- Restart inhibit (without underexcitation protection)
Monitoring functions
- Trip circuit supervision
- Fuse failure monitor
- Operational measured values V, I, f,…
- Every metering value Wp,Wq
- Time metering of operation hours
- Self-supervision of relay
- 8 oscillographic fault records
Communication interfaces
- System interface
- IEC 60870-5-103 protocol
- PROFIBUS-DP
- MODBUS RTU
- DNP 3.0
