GIEE Single Phase Voltage Rise/Drop Calculator v1.0

Keywords:

XFMR: Transformer.
PF: Power Factor.
PV: Photovoltaic
L-L: Line to Line.
SMW: Secondary Main Wire (This is the wire between the transformer and the load point junction).
SDW: Service Drop Wire (This is the cable between the transformer or the load point junction to the customer load).
DG: Distribution Generation/Generator.
H.V: High Voltage.
L.V: Low Voltage.
PCC: Point of Common Coupling = Customer Meter Panel.
V.D: Voltage Drop.

1Φ Voltage Rise/Drop Calculator (Center-Tapped XFMR)

Load Info

Customer Load (kVA)

For worst case senario, please leave this value zero.

Customer Load PF (%)

∑ Other Load connected to the same XFMR (kVA)

For worst case scenario, please leave this value zero.

Other Load PF (%)

Distributed Generator Info.

PV Array Size (kVA)

Assuming Unity Power Factor

Power Factor (%)

Transformer Info.

Service Transformer Size (kVA)

Service Transformer Load PF (%)

XFMR Primary Voltage (kV, L-L)

XFMR Secondary Voltage (V, L-L)

XFMR Impedance (Z%)

XFMR Base Impedance Referred to Secondary (Ω)

XFMR Impedance Referred to Secondary (Z, Ω)

Secondary Main Wire Info.

SMW Length (ft)

Impedance (Z, Ω/mile)

Service Drop Wire Info.

SDW Length (ft)

Impedance (Z, Ω/mile)

Load Analysis

Net Customer Load (Load1-DG)

Net Load on the XFMR (Load1+Other loads-DG)

Current

Current Through the SDW (Amps)

Current Through out the XFMR/SMW (Amps)

Voltage Drop/Rise Through XFMR, SMW & SDW

Voltage Drop/Rise Through XFMR (V)

(-) voltage rise, (+) voltage drop

Voltage Drop/Rise Through SMW (V)

(-) voltage rise, (+) voltage drop

Voltage Drop/Rise Through SDW (V)

(-) voltage rise, (+) voltage drop

Voltage Across XFMR Terminals

H.V Side (kV, L-L)

H.V Side (kV, L-N)

H.V Side Including Voltage Drop/Rise (kV,L-L)

H.V Side Including Voltage Drop/Rise (kV, L-N)

L.V Side Including Voltage Drop/Rise (V, L-L)

L.V Side Including Voltage Drop/Rise (V, L-N)

Voltage Tolerance Boundary

Max %

Min %

Maximum Allowable Voltage (V, L-L)

Secondary Side

Minimum Allowable Voltage (V, L-L)

Secondary Side

Maximum Allowable Voltage (V, L-N)

Secondary Side

Minimum Allowable Voltage (V, L-N)

Secondary Side

Results: Voltage At the Customer Meter Panel

Voltage At Customer Meter Panel (V, L-L)

Voltage At Customer Meter Panel (V, L-N)

System Status: Normal/Under/Over Voltage

System Status:

Delete All Above Values and Start Over.

For any suggestion or question please contact us.

Hidden-Over Voltage

Hidden-Under Voltage

Hidden-Normal Voltage

XFMR Ratio

Submit

Disclaimer :

Neither GIEE nor any person related to the compilation of this calculator/tool make any warranty, expressed or implied, or assume any legal liability or responsibility for the accuracy, completeness or usefulness of any information disclosed or rendered by this calculator.

Version 1.0, Oct 24, 2016

Try the Three Phase Tool!