FEEDER PROTECTION RELAY BLOCK ADR245B

Protection & Control Functions:
1. Four Independent Settings Groups.
2. Directional / Non Directional Phase & Ground Over Current Function (50/51/51N/51/67/67N).
3. Four Independent Stages for Directional/Non Directional Phase Over Current Protection.
4. Three Stages of Directional/Non Directional Ground Over Current Protection.
5. Internally Derived / Externally measured Ground Over Current (3I0>) Protection.
6. Inverse time Over Current Protection (IEC & IEEE curves according to IEC60255).
7. High Impedance Restricted Earth Fault Protection (64R).
8. Thermal Overload Protection (49)
9. Inverse & Definite time Negative Phase Sequence Over Current Protection (46).
10. Broken Conductor Protection (46BC)
11. Negative Phase Sequence Over Voltage Protection (47).
12. Under and Over Voltage Protections (27 /59).
13. Externally measured / Internally calculated Residual Over Voltage Protection (59N).
14. Frequency Protection (81)
15. Rate of change of Frequency (81R) (Optional)
16. Fault Locator (21FL) (Optional)
17. Sync Check (25) (Optional)
18. SOTF (Optional)
19. Multi shots (4-shots) Auto-reclosing function.
20. Breaker Failure detection (50BF)
21. VT and CT supervision function
22. Trip circuit supervision function
23. Programmable Inputs & Outputs
24. CB Close / Trip from HMI
25. Programmable & Target LEDs for indications with dual colours
26. Self Supervision of relay
27. Metering function
28. Disturbance Recording (10 nos.)
29. Event Recording
30. Fault Recording on HMI display (10 nos.)
31. Non-Volatile memory
32. SCADA communication
33. Single / Dual Ethernet ports (RJ45 / FO), RS485 port
34. PC front port communication for convenient relay settings
35. User friendly local operation with key pad
36. Password Protection
38. If Special connector is removed from the back side of the CT Terminal, CT secondary terminal will be automatically shorted.
39. Measurement of Voltage, current magnitude, symmetrical components, Real, Reactive and Apparent Power, Power factor and frequency.

Applications:
ADR245B numerical multifunction relay is designed for Transmission line protection, Underground cable & feeder protection, Machine protection, and shunt capacitor bank protection applications. Relay designed with fast and selective tripping ensures the stability and availability of electrical power system. ADR245B relay can be applied for protection, control & monitoring of radial and ring main feeder to achieve sensitivity and selectivity on phase and ground faults.

This feeder protection relay block is easily insert in your schematic diagram and connect as you like way.

1. Directional / Non Directional Over Current Protection (50/50N/51/51N/51V/67P/67N):
The core functionality of ADR245B relay is equipped with multi function feeder protection. The relay provides Directional and Non Directional phase and ground over current protection with multiple settings (four stages for phase over current and three stages for ground over current) for various power system applications and wide range of protection settings. The relay is equipped with digital filter algorithms, which provides the rejection of higher
harmonics & DC offset. Selectable IEC/IEEE inverse time curves with directional/non directional over current protection will be provide greater selectivity, flexibility and sensitivity to users for better relay co-ordinations.
ADR245B relay provides inverse time over current characteristic for phase and ground over current elements. Each stages of phase and ground over current elements are independently settable with inverse time or definite time characteristic.
ADR245B relay provides three stages of externally ground over current protection. ADR245B relay measures ground fault current through neutral CT input. Externally ground CT input can also be applied for high impedance restricted earth fault protection or for sensitive ground fault protection through CBCT. Voltage controlled over current (51V) protection can be applied for distributed generator against phase faults. Protection function is selectable in over current menu.
2. Thermal overload Protection (49):
ADR245B relay provides thermal over load protection of transformer against over load conditions. Relay estimates thermal content and initiate alarm & tripping if the thermal contents are higher than the preset value. Trip time of relay follows the thermal time constant value set in relay.
3. Sequence Over Current Protection (50P/46):
ADR245B provides sequence over current against unbalance faults/condition or high impedance faults over transmission line/under ground cable or over load condition. Sequence over current function is provided in two modes; Positive sequence and Negative sequence over current function. User can select the mode based on their application and requirement.
4. Broken Conductor Protection (46BC):
ADR245B is equipped with Broken conductor detection protection. Broken conductor condition can be detected by the ratio of Negative sequence current to Positive sequence current (I2/I1). Protection provides higher sensitivity on High resistive fault.