GE GEK 106168E Power Supply User Manual


 
1. GENERAL DESCRIPTION AND APPLICATION
GEK-106168E DBF Breaker Failure Protection 1
1.
1. 1.
1. GENERAL DESCRIPTION AND APPLICATION
GENERAL DESCRIPTION AND APPLICATIONGENERAL DESCRIPTION AND APPLICATION
GENERAL DESCRIPTION AND APPLICATION
1.1. GENERAL DESCRIPTION
The DBF system is a microprocessor based breaker failure protection, control and measurement unit that has
different algorithms to allow its use on a wide range of applications in power systems.
The functions and information management of the unit can be performed remotely (computer connected to the
serial port RS232, fiber-optic or modem) or locally using the man-machine interface (HMI), which includes a 20
keys keypad, and a two line liquid crystal display (LCD) on the front of the relay.
The system provides the following functions:
a) Protection
Low current level breaker failure protection, following a single or three phases initiation, with up to
two time delayed steps.
High current level breaker failure protection, following a two/three (selectable by setting) phases
initiation.
No current breaker failure protection, following a two/three (selectable by setting) phases initiation.
Breaker internal arc detection.
b) Monitoring
Current measurements for each phase and ground.
Breaker status
16 fully configurable LED indicators
One fixed relay status LED
Breaker health monitoring (ΣI
2
t).
Built-in self-check functions.
c) Analysis:
Event recorder
Oscillography
d) Control:
3 settings’ tables
Time synchronization using the communications program, the IRIG-B input or the HMI (keypad and
display).
Configurable inputs and outputs.
User can build logic schemes using AND, OR and NOT gates and the internal digital signals of the
relay.