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1MRK 502 071-UUS A
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Application manual
•
IEC: Transformer parameters like constants, winding and oil exponents will be
taken from IEC 60076-7 standard for temperature calculations.
•
IEEE: Transformer parameters like constants, winding and oil exponents will be
taken from IEEE C57.96-1995 standard for temperature calculations.
CurrSelectMode: This setting is used to select the current determining method which is
used for the load factor calculation. The function takes phase currents of each winding
as input. From each winding, only one phase current is considered for load factor
calculation. The options are:
•
Average: The average of all phase currents of winding is considered for
calculation.
•
Maximum: The maximum current out of the all phase currents is considered for
calculation.
TempeUnitMode: This setting is used to select the temperature unit to be used for the
function interface. The options are:
•
°F: The temperature unit will be selected as °F. Since all calculation formulae
needs temperature values in °C, the temperature inputs are converted into °C for
calculation. Once the calculations are done, the outputs in °C are converted into
°F.
•
°C: The temperature unit will be selected as °C. All temperature inputs will be
taken as they are and the output is given in °C.
LOLSPTR (26/49HS) can work with (n-1) winding CT availability, that is, if the given
transformer has three windings and it has CTs only in two windings, then the function
will calculate the missing winding current based on voltage transformation ratio.
Following settings are required to calculate the winding current with available CT
input:
AvailableCT: Availability of CT connection can be set by this setting. The options are:
•
Winding 1: Only winding 1 CT is available. This option can be selected when two
winding transformer is considered.
•
Winding 2: Only winding 2 CT is available. This option can be selected when two
winding transformer is considered.
•
Winding 1&2: Only winding 1 and winding 2 CTs are available. This option can be
selected when three winding transformer is considered.
Section 17
Monitoring
GUID-4D6F8802-AFCC-4277-8844-A87A98A5F2C8 v1
717
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