Line differential protection Relay Block 7SD5 With (1NO+1NC)

Siemens make Current Comparison Protection Siprotec Numerical Relay for overhead line and cables

Type : 7SD511

Features and technical specifications:

1. Current Comparison Protection
2. CT inputs : 4 No’s
3. Binary inputs : 4 No’s
4. Binary output’s : 5 Alarm relay outputs, 2 command output (2NO each)
5. External DC power supply required
6. Coupling to remote line end, Fibre optic interface or 24V Interface (RS232C)

The following functions are available

1. Current Comparison Protection
2. Thermal Overload Protection
3. Over Current Time Protection (Emergency)