GE GEK-106273L, Instruction Manual

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PRODUCT DESCRIPTION
GEK-106273L MIF Digital Feeder Protection 5-37
5.3.9. BREAKER FAILURE TO OPEN
ENERVISTA MII
SETUP
HMI DEFAULT RANGE STEP
Breaker failure to
open Breaker failure to
open
BF
Breaker failure to open
enable Breaker failure
function
BF ENABLE NO Y/N NA
Fail to open timer Fail to open timer BF TIME 400 50-999 ms 1 ms
5.3.10. COLD LOAD PICKUP
ENERVISTA MII
SETUP
HMI DEFAULT RANGE STEP
Cold load pickup Cold load pickup CLP
Cold load pickup
enable Cold load pickup
function
CLP ENABLE NO Y/N NA
Pickup time T IN T IN 2 0-60 s 0.001 s
Drop out time T OUT T OUT 2 0-60 s 0.001 s
Constant. 50P pickup K 50P K 50P 1 1-5 0.01
Constant 51P pickup K 51P K 51P 1 1-5 0.01
COMMENTS ON SETTINGS:
1. The ACTIVE TABLE setting, in the Advanced General Settings, selects which of the two settings tables is active at
a given time. Its default value is 1 (TABLE 1).
2. The procedure to set the Phase and Ground TOC (Time Delayed Overcurrent) functions (51P / 51N) is the same
for both functions: First, the pickup value must be set (PICKUP); Then, using the CURVE TYPE (current versus
time tripping characteristic curve), the type of time delay preferred is selected, either DEFINITE TIME, or any of
the three inverse curves; If the choice is any of the inverse curves (Inverse, Very Inverse or Extremely Inverse),
then the relay takes into account the TIME DIAL setting, to identify which of the curves in the family (there are 195
different curves for each curve type, depending on the Time Dial Selected) must use; If the current versus time
tripping characteristic is DEFINITE TIME, then the Time Dial setting is ignored and the time delay used is the
specified in DEFINITE TIME setting.
5.4 TIME SYNCHRONIZATION
MIF relay includes an internal clock to time tag events. This clock can be synchronised with the computer clock using
the ENERVISTA MII SETUP software program. It can also be set to a given Date and Time using the faceplate
keypad.