Siprotec 7SJ62 Overcurrent Relay

Product Description

Functions:

Protection functions

• Overcurrent 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

• Commands for control of a circuit-breaker and of isolators

• Position of switching elements is shown on the graphic display

• Control via keyboard, binary inputs, DIGSI 4 or SCADA system

• User-defined logic with CFC (e.g. interlocking)

Monitoring functions

• Operational measured values V,l,f

• Energy metering values Wp,Wq

• Circuit-breaker wear monitoring

• Slave pointer

• Trip circuit supervision

• Fuse failure monitor

• 8 oscillographic fault records

• Motor Statistics

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
• 3/4 voltage transformers
• 8/11 binary inputs
• 8/6 output relays