Multifunction Protection Relay Block 7SJ62 With (4NO)

Features and technical specifications:

1. Motor Protection
2. CT inputs : 4 No’s
3. VT inputs : 3 No’s
4. Binary inputs : 8/11 No
5. Binary output’s : 8/6 NO
6. RS485 Communication Port

functions :-

• Time-over current protection (definite-time/inverse-time/user-def.)
• Directional time-over current protection (definite-time/inverse-time/user-def.)
• Sensitive dir./non-dir. earth-fault detection
• Displacement voltage
• Intermittent earth-fault protection
• High-impedance restricted earth fault
• Inrush restraint
• Motor protection
– Undercurrent monitoring
– Starting time supervision
– Restart inhibit
– Locked rotor
• Overload protection
• Temperature monitoring
• Under-/overvoltage protection
• Under-/overfrequency protection
• Breaker failure protection
• Negative-sequence protection
• Phase-sequence monitoring
• Auto-reclosure
• Fault locato

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

The relay provides a simple control of the circuit-breaker and automation functions. The integrated programmable logic (CFC) allows the user to implement their own functions, e. g. for the automation of switchgear (interlocking). The user is also allowed to generate user-defined messages. The flexible communication interfaces are open for modern communication architectures with control systems. The SIPROTEC 4 7SJ62 unit is a numerical protection relay that also performs control and monitoring functions and therefore supports the user in cost-effective power
system management, and ensures reliable supply of electric power to the customers. Local operation has been designed according to ergonomic criteria. A large, easy-to read display was a major design aim.

Control :-
The integrated control function permits control of disconnect devices (electrically operated/motorized switches) or circuit breakers via the integrated operator panel, binary inputs, DIGSI 4 or the control and protection system (e.g. SICAM). A full range of command processing functions is provided.