Solutions   for   Protecting   andManaging   the   Electrical   Network

GMS   7000

Digital protection for synchronous machines

GMSx 7000 series relays are designed to protect synchronous machines connected to three phase 50 Hz or 60 Hz electrical networks.
The GMSx 7000 series is made up of two families:

  • the GMSx 7001, designed for the protection of synchronous generators driven by any type of prime mover: steam turbines, water turbines, gas turbines, diesel engines, gas engines.
  • the GMSx 7002, designed for the protection of synchronous motors, driving centrifugal or reciprocating compressors, crushers, or any type of mechanism.

Each family contains three models differentiated by the detection method used for earth faults as well as the primary electrical value used:

  • GMS 7000, used when the 3 phase voltages are available (3 VT / distributed neutral) and when the zero sequence voltage, built by an internal summation, is used as a characteristic value in the operation of the relay.
  • GMSH 7000, used when the 2 phase to phase voltages are available and when the zero sequence current is used as a characteristic in the operation of the relay.
  • GMSV 7000, used when the 2 phase to phase voltages are available and when zero sequence voltage, from a star point or open delta VT, is used as a characteristic in the operation of the relay.

PROTECTION   FUNCTIONS

GMS 70001
  • Under impedance [21]
  • Over fluxing (Volts/Hertz) [24]
  • Under [27] and over [59] voltage
  • Reverse power [32-1]
  • Under or over power [32-2]
  • Field failure (loss of excitation) [40]
  • Negative phase sequence overcurrent [46]
  • Thermal image overload [49]
  • Overcurrent [51]
  • Neutral displacement overvoltage [59G] (GMS, GMSV)
  • Earth fault [64] (GMSH)
  • Under and over frquency [81]

GMS 70002
  • Thermal image overload [49]
  • Negative phase sequence overcurrent [46]
  • Loss of synchronism / pull out [55]
  • Overcurrent [50]
  • Too long start / Locked rotor [51LR]
  • Under [27] and over [59] voltage
  • Over fluxing (Volts/Hertz) [24]
  • Under or over power [32-2]
  • Under and over frquency [81]
  • Field failure (loss of excitation) [40]
  • Neutral displacement overvoltage [59G] (GMS, GMSV)
  • Earth fault [64] (GMSH)

MAIN   FEATURES

  • 5 programmable output units + watchdog unit
  • Programmable tripping characteristics
  • Setting by RS232 port or frontal keyboard
  • Sequence of Events
  • Trace functionality
  • Modbus rear port for connection to SCADA remote system

downloads

  Device Doc. Type Lang. Ref. Index
GMS 7000 Leaflet EN / FR -- --
GMS 7001 User manual IT M.1813 B
GMS 7001 Connection/Definition Diagram -- 22A3 B
GMSH 7001 Connection/Definition Diagram -- 15A7 E
GMSV 7001 Connection/Definition Diagram -- 20A9 F