SIPROTEC 7UM61, siprotec 4 7um61, siemens siprotec 4 7um61, numerical protection relay siemens, numerical distance protection relay, SIPROTEC 4 devices SIPROTEC 7UM61 and siprotec 4 7um61

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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, over voltage, over frequency or under frequency, 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 over frequency protection
  • Reverse power protection
  • Overexcitation protection
  • External trip coupling
Standard version - Scope of basic version plus
  • Forward-power protection
  • Under excitation protection
  • Negative-sequence protection
  • Breaker failure protection
Full version - Scope of standard version plus:
  • Inadvertent energization protection
  • %- stator earth fault protection with 3rd harmonic
  • Impedance protection
Asynchronous motor - Scope of standard version plus
  • Motor starting time supervision
  • Restart inhibit (without under excitation 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
    • DNP 3.0

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