Siemens siprotec 4 7sj63, SIPROTEC 7SJ63, numerical protection relay siemens, numerical relay protection of transformer,SIEMENS Numerical Relay Siemens siprotec 4 7sj63 and SIPROTEC 7SJ63

ReliServ Solution

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Test Data

ReliServ Solution

The SIPROTEC 4 7SJ63 can be used as a protective control and monitoring relay for distribution feeders and transmission lines of any voltage in networks that are earthed (grounded), low-resistance earthed, unearthed, or of a compensated neutral point structure. The relay is suited for networks that are radial or looped, and for lines with single or multi-terminal feeds. Regarding the time-overcurrent/directional time overcurrent protection the characteristics can be either definite time, inverse time or user-defined.

The SIPROTEC 4 7SJ63 is equipped with motor protection applicable for asynchronous machines of all sizes.Motor protection comprises undercurrent monitoring, starting time supervision, restart inhibit locked rotor.

The relay provides easy-to-use local control and automation functions. The number of controllable switchgear depends only on the number of available inputs and outputs. The integrated programmable logic (CFC) allows the user to implement their own functions, e.g. for the automation of switchgear (interlocking). The user is able to generate user-defined messages as well.
Protection Functions
  • Over current protection (definite-time/inverse-time/user-def.)
  • Directional overcurrent protection (definite-time/inverse-time/user-def.)
  • Sensitive dir. earth-fault detection
  • Displacement voltage
  • Intermittent earth-fault protection
  • Directional intermittent ground fault protection
  • High-impedance restricted earth fault
  • Inrush Restraint
  • Motor protection
  • Overload protection
  • Temperature monitoring
  • Under-/overvoltage protection
  • Under-/overfrequency protection
  • Rate-of-frequency-change protection
  • Power protection (e.g. reverse, factor)
  • Undervoltage controlled reactive power protection
  • Breaker failure protection
  • Negative-sequence protection
  • Phase-sequence monitoring
  • Synchro-check
  • Auto-reclosure
  • Fault locator
  • Lockout
Control functions/programmable logic
  • Flexible number of switching devices
  • Position of switching elements is shown on the graphic display
  • Local/remote switching via key operated switch
  • Control via keyboard, binary inputs, DIGSI 4 or SCADA system
  • Extended User-defined logic with CFC (e.g. interlocking)
Monitoring functions
  • Operational measured values V, I, f,...
  • Energy metering values Wp, Wq
  • Circuit-breaker wear monitoring
  • Slave pointer
  • Trip circuit supervision
  • Fuse failure monitor
  • 8 oscillographic fault records
Communication interfaces
  • System interface
    • IEC 60870-5-103/ IEC 61850
    • PROFIBUS-FMS/-DP
    • DNP 3.0/MODBUS RTU
  • Service interface for DIGSI 4 (modem)
  • Front interface for DIGSI 4
  • Time synchronization via IRIG B/DCF77
Hardware
  • 4 current transformers
  • 3/8/11 binary inputs
  • 8/11 binary inputs
  • 8/6 output relays

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