GEK - 105560
24
6.1 READOUT SEQUENCE
This is the typical sequence for the MLJ as well as the power-up sequence. It is divided into a series of
“Functions”, each corresponding to different types of information. These functions are numbered from
1 to 12 and are identified by the letter F followed by the number of the function.
In normal operation, and shortly after being connected,
the MLJ displays the state of the line and bus. The left-
hand segment represents the state of the line and the
right-hand segment, the state of the bus. If both are live,
two horizontal upper segments will light up. This is the
reading assigned to the last function, F12.
If the ENTER button is now pressed and held down, F0
will appear.
While the button is pressed, this code will remain on the
display. It tells us that we are in Function 0 of the Readout
Sequence. This function, which will appear as soon as the
button is released, indicates the Status of the relay.
If the ENTER button is pressed a second time, the
second function, F1 will appear. This function shows the
value of the line voltage, and will be seen as soon as the
ENTER button is released.
In this fashion, pressing and releasing the ENTER button, we can go through the entire Readout
Sequence. On the front of the relay, under the word “DISPLAY” there is a list of all of the functions.
They are listed below:
F0:
STATUS
State of relay
F1:
VL
Line voltage
F2:
VB
Bus voltage
F3:
∆
V
Modulus of voltage difference
F4:
∆θ
Phase angle
F5:
∆
f
Frequency slip
F6:
LAST VL
VL in the last close enable
F7:
LAST VB
VB in the last close enable
F8:
LAST
∆
V
∆
V in the last close enable
F9:
LAST
∆θ
∆θ
in the last close enable
F10:
LAST
∆
f
∆
f in the last close enable
F11:
TEST
Display test, LEDs and inputs
F12:
VL VB
State of line and bus
Each of these functions are covered in further detail.
ENT
Summary of Contents for MLJ
Page 36: ...GEK 105560 35 Figure 1 Logical diagram of Operation 226B2202H2 ...
Page 37: ...GEK 105560 36 Figure 2 Nameplate 226B1276H1 ...
Page 38: ...GEK 105560 37 Figure 3 Outline and panel drilling 226B6086H1 ...
Page 39: ...GEK 105560 38 Figure 4 Rear terminal plate 226B3205H1 ...
Page 41: ...GEK 105560 40 Figure 6 Internal settings 301A7408H1 ...
Page 42: ...GEK 105560 41 Figure 7 Block Diagram 226B2201H1 ...