3.2.1.2 Potential Transformer Primary Value
The nominal full scale voltage will be displayed as Line to Line Voltages for 3 Phase 3 wire and
3 Phase 4 wire and 1 Phase 2 wire for Single Phase.
This screen can be accessed only from system parameters list menu.
Here again 0 to 9 digit input keypad is provided to set value of PT
Primary, & user can conrm this value with a simple touch “ key”.
“ key” is used to multiply value by 1000.
In case presently displayed Potential Transformer Primary value
together with the Current Transformer Primary value, previously set,
would result in a maximum power of greater than 666.6 MVA per
phase,”Invalid value” will be displayed. Then the valid range will be
displayed.
Valid range of PT primary setting value is
100V L-L to 692.8KV L-L.
If value outside
the range is entered, It will
display “
INVALID VALUE
”
followed by correct range of parameter.
Note
: Changing PT Primary would erase the Sag and Swell data of
PQ events.
3.2.1.1 System Type
This screen is used to set the system type.
Two types: 3 phase 3 wire & 3 phase 4 wire system are displayed on
screen (for RM3440i). Touching radio button in front of particular type
will select that type.
Touch on “ key” will conrm the system type.
Touching the “ key” will keep the old selected setting and will
return to previous menu.
Note
: If system type is changed, relay parameter selection & analog output selection will be set
to NONE and all the PQ event data (sag/ swell/ overcurrent) would be erased.
SYSTEM TYPE
3-PHASE 4 WIRE
FOR 3 PHASE STAR CONNECTED LOAD
3-PHASE 3 WIRE
FOR 3 PHASE DELTA CONNECTED LOAD
OK
BACK
OK
BACK
VALID RANGE IS : 100.0 TO 692800
K
ENTER
15
