Schweitzer Engineering Laboratories SEL-734 - Table 4.12 Required User Input

4.23
Date Code 20090730 Instruction Manual SEL-734 Meter
Metering
Transformer/Line Loss Compensation
Transformer/Line Losses Compensation (ETLLC) must be enabled to
compensate for losses or to program loss compensation settings. Copper
(load) and iron (no load) transformer loss compensation can be calculated
independently by enabling the ELCU and ELFE settings.
The SEL-734 requires the user input shown in Table 4.12 to calculate
transformer/line loss compensation. All equations that follow in Transformer
Losses on page 4.24 and Line Losses on page 4.24, show how the meter
performs loss calculations and are not required of the user.
Peak Demand
MWAPI MVRAPI MVRAPI_LG MVRAPO_LG
MWBPI MVRBPI MVRBPI_LG MVRBPO_LG
MWCPI MVRCPI MVRCPI_LG MVRCPO_LG
MW3PI MVR3PI MVR3PI_LG MVR3PO_LG
MWAPO MVRAPO MVRAPI_LD MVRAPO_LD
MWBPO MVRBPO MVRBPI_LD MVRBPO_LD
MWCPO MVRCPO MVRCPI_LD MVRCPO_LD
MW3PO MVR3PO MVR3PI_LD MVR3PO_LD
Energy Metering
MWHAI MVRHAI_LG MVRHAO_LG
MWHBI MVRHBI_LG MVRHBO_LG
MWHCI MVRHCI_LG MVRHCO_LG
MWH3I MVRH3I_LG MVRH30_LG
MWHAO MVRHAI_LD MVRHAO_LD
MWHBO MVRHBI_LD MVRHBO_LD
MWHCO MVRHCI_LD MVRHCO_LD
MWH3O MVRH3I_LD MVRHCO_LD
MWHA_NET MVRHAI MVRHAO
MWHB_NET MVRHBI MVRHBO
MWHC_NET MVRHCI MVRHCO
MWH3_NET MVRH3I MVRH3O
Table 4.12 Required User Input (Sheet 1 of 2)
Setting Description
Transfo rmer
Losses
MVA Base transformer 3-phase MVA rating
KVLL Line voltage
L-L
on primary side of instrument PT in kV
%Z Percent transformer impedance
%IMAG Percent transformer exciting current
LWCU Copper or load-loss in kW
LWFE Iron or no-load-loss in kW
Table 4.11 Analog Values Affected by Transformer/Line Loss Compensation
(Sheet 2 of 2)
Courtesy of NationalSwitchgear.com