1: Three Element Loss Compensation Worksheet - Electro Industries Nexus 1262 Installation & Operation Manual

8.2.1.1: Three Element Loss Compensation Worksheet

Company
Date
Trf Manf
Calculation by
Transformer Data (from Transformer Manufacturer's Test Sheet)
Winding
HV - High
Xv - Low
YV - Tertiary
Value
No-Load Loss
Load Loss
Enter 3-Phase or 1-Phase values. If 3-Phase values are entered, calculate 1-Phase values by dividing
3-Phase values by three. Convert 1-Phase Loss Watts to 1-Phase kW by dividing 1-Phase Loss Watts by
1000.
Value
Self-Cooled Rating
Enter 3-Phase or 1-Phase values. If 3-Phase values are entered, calculate 1-Phase values by dividing
3-Phase values by three. Convert 1-Phase Self-Cooled MVA to 1-Phase kVA by multiplying by 1000.
% Exciting Current
% Impedance
Value
Test Voltage (volts)
Full Load Current (Amps)
Test Voltage is generally Phase-to-Phase for three-phase transformers. Calculate Phase-to-Neutral
Voltage by dividing Phase-to-Phase Voltage by √3. Calculate Full Load Current by dividing the (1-Phase
kW Self-Cooled Rating) by the (Phase-to-Neutral Voltage) and multiplying by 1000.
Electro Industries/GaugeTech
Station Name
Trf Bank No.
Trf Serial No.
Voltage
Watts Loss
3-Phase
3-Phase MVA 1-Phase MVA
Phase-to-Phase
Doc # E151701
MVA Connection
1-Phase 1-Phase kW
1-Phase kVA
Phase-to-Neutral
∆ - Y
∆ - Y
∆ - Y
8-5