Lead LD-BK10 Series - Control Parameters Modification

Ob: target value for start/stop of fan
AH: target value for over-temp trip
ObJ: target value for start/stop of
transformer room fan
AHJ: target value for over-temp
tripping in transformer room
Hb: target value for start/stop of
dehumidification heater
Starting temperature of fan＞Ob+dF
Starting temperature of fan in
transformer room＞ObJ+dFJ
Starting temperature of dehumidifi-
cation heater＞Hb+HdF
dF: backlash of target value for
start/stop of fan
AL: target value for over-temp alarm
dFJ: backlash of target value for
start/stop of fan in transformer room
ALJ: target value for iron core over-temp
alarm
HdF: backlash of target value for
start/stop of dehumidification heater
Stopping temperature of fan＜Ob-dF
Stopping temperature of fan in trans-
former room＜ObJ-dFJ
Stopping temperature of dehumidifica-
tion heater＜Hb-HdF
Note:
① The backlash of target value is 0.3 ℃ by default, except those for cooling fan, trans-
former room fan and dehumidification heater.
② The parameters shown above are all for reference and specific set value shall be subject
to the delivery label.
Example: If Ob=90.0 dF=10.0, then the starting temperature is 100.1 ℃, the stop tempera-
ture is 79.9 ℃.
3. Control Parameters Modification (P1005)
12
Modified
value AHJ
Modified value Ob
Modified value dF
Modified value AH
Modified value AL
Modified
value ALJ
Modified
value dFJ
Modified
value ObJ
Modified
value HdF
Modified
value Hb
Normal display status
Operation stips of winding temerature measurement Operation steps for ambient temperature measurement Operation steps for iron core temperature measurement Operation steps for ambient humidity measurement