Electro-Voice 1252, 250 operation manual Three Element Loss Compensation Worksheet

7.2.1.1: Three Element Loss Compensation Worksheet

Company

Date

Trf Manf

Calculation by

Station Name

Trf Bank No.

Trf Serial No.

Transformer Data (from Transformer Manufacturer’s Test Sheet)

Winding	Voltage		MVA	Connection
HV - High				∆ - Y
Xv - Low				∆ - Y
YV - Tertiary				∆ - Y
Value		Watts Loss
	3-Phase		1-Phase	1-Phase kW
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	3-Phase MVA	1-Phase MVA	1-Phase kVA
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	Phase-to-Phase	Phase-to-Neutral
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 Doc # E107706 V1.25 7-5