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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.