phase to ground voltage calculator
Calculate phase-to-ground voltage in single-phase and three-phase systems. Essential for power distribution, grounding checks, and electrical safety.
3 phase voltage to ground
In three-phase circuits, to obtain phase-to-ground voltage from line-to-line voltage, divide that voltage by sqrt{3}. In single-phase circuits use the line-to-neutral voltage.
Formula & Table Summary:
- Single Phase: VPG = VLN
- Three Phase: VPG = VLL / √3
electrical grounding voltage
A Phase to Ground Voltage Calculator can be used to check the voltage between a live conductor and ground on a single or three-phase circuit as a safety and equipment verification mechanism.The calculator can be applied by engineers, electricians, and students troubleshooting a power distribution network on the grounding, motors, and grounding checks. Just key the type of system and voltage and you will get the results immediately.
ground fault voltage
| System Type | V_LL (V) | V_LN (V) | V_PG (V) |
|---|---|---|---|
| Single-phase | — | 120 | 120 |
| Three-phase | 400 | — | 230 |
Frequently Asked Questions - phase to ground voltage calculator:
What is phase-to-ground voltage?
It is the voltage measured between a live phase conductor and ground (earth).
How to calculate phase-to-ground voltage in 3-phase systems?
Divide line-to-line voltage by √3.
Is phase-to-ground voltage the same as line-to-neutral?
Yes, in balanced systems.
Why is phase-to-ground voltage important?
It helps ensure safety, prevent overvoltage, and match equipment ratings.
What is the phase-to-ground voltage of 400V 3-phase?
Approximately 230V.
What happens if phase-to-ground voltage is too high?
It may indicate a fault or incorrect grounding.
Can phase-to-ground voltage be zero?
Only in a fault or open circuit condition.
What is V_LL in the formula?
V_LL is line-to-line voltage.
Why divide by √3 in 3-phase?
Because the phase voltage is the projection of line voltage in a balanced system.
Does grounding type affect voltage?
Yes, especially in ungrounded or high-resistance grounded systems.
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