Motor and Generator Protections

Basic Characteristics:

  • State-of-the-art digital protections produced by prestigious world leading manufacturers

  • Supplies incl. design, protection cubicle, putting into operation, training and service

  • Optional solution according to application, power output, customer requirement

  • Possible connection to the central control system

  • Diagnostics of protections, events- and failure history

  • For motors and generators of power outputs from 500 kW to 100 MW.

Flow Chart:

schema

Protection Assembly:

  • Determined on the basis of criteria : power output, type of the set, customer´s requirements, price

  • Selection of manufakturers : SIEMENS, ABB, ALSTHOM, SEG, General Electric

  • Supply of further service components : notebook, source case for protection testing

  • Possibility of delivering stand-by protections using the TE 5401 system

  • Possibility of interconnecting protections via communication line and connection to the central control

  • Flow chart of protections coded according to IEC 617 numeric codes:

  • 81 - overfrequency and underfrequency

  • 27 - undervoltage for blocking

  • 59 - overvoltage, two-stages

  • 64 F - rotor earth fault

  • 32R - reverse power

  • 87 G - differentia

  • 67N - stator earth fault, directiona

  • 40 - loss of field and asynchron.oper.

  • 50 - def. time overcurrent, blocked by U<

  • 51 - inverse time overcurrent

  • 46 - unbalanced load

  • Supply possibility of protections of transformers, bus-bars, mains - complex protecion solution