Multifunction Protection Relay Block 7SJ610

Features and technical specifications:

1. Motor Protection
2. CT inputs : 4 No’s
3. Binary inputs : 3/8/11 No
4. Relay output’s : 4/8/6 NO
5. Surface-mounting or flush-mounting housing
6. Text display or graphical display
7. RS485 Communication Port

The following functions are available

1. Protection functions
   • Overcurrent protection (definite-time/inverse-time/user-def.)
   • Sensitive earth-fault detection
   • Intermittent earth-fault protection
   • High-impedance restricted earth fault
   • Inrush – Current detection
   • Motor protection
     – Undercurrent monitoring
     – Starting time supervision
     – Restart inhibit
     – Locked rotor
     – Load jam protection
   • Overload protection
   • Temperature monitoring
   • Breaker failure protection
   • Negative-sequence protection
   • Auto-reclosure
   • Lockout
   • Motor protection
     – Undercurrent monitoring
     – Starting time supervision
     – Restart inhibit
     – Locked rotor
     – Load jam protection
   • Overload protection
   • Temperature monitoring
   • Breaker failure protection
   • Negative-sequence protection
   • Auto-reclosure
   • Lockout
2. 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)                                                                                                                         3. Monitoring functions
     • Operational measured values
     • Circuit-breaker wear monitoring
     • Slave pointer
     • Time metering of operating hours
     • Trip circuit supervision
     • 8 oscillographic fault records
     • Motor statistics

This Multifunction Protection Relay Block is easily insert in your schematic diagram and connect as you like way.

The relay provides control of the circuit breaker, further switching devices and automation functions. The integrated programmable logic (CFC) allows the user to implement their own functions, e. g. for the automation of switch gear (interlocking). The user is also allowed to generate user-defined messages. The flexible communication interfaces are open for modern communication architectures with control systems.