this is because the ground is energized. but it could also be that voltage going through a light and trying to return to the electrical panel on the white, but not being able to get there due to an open neutral that is touching the bare metal of the can light or a ground wire.
Q. What causes voltage imbalance?
Unbalanced voltages usually occur because of variations in the load. When the load on one or more of the phases is different than the other(s), unbalanced voltages will appear. This can be due to different impedances, or type and value of loading on each phase.
Table of Contents
- Q. What causes voltage imbalance?
- Q. How do you fix phase imbalance?
- Q. What causes high voltage in a transformer?
- Q. What happens if a too much high voltage is applied to a transformer?
- Q. Is 270 volts too high?
- Q. What are the reasons for over voltage on transformer secondary?
- Q. How do you reduce the secondary voltage of a transformer?
- Q. Why is there a voltage drop at the secondary terminals of a transformer when the load increases?
- Q. Why does the primary current in a transformer increase when a load is connected across the secondary?
- Q. What is the magnetizing current in a transformer is rich in?
- Q. How do you find the primary and secondary current of a transformer?
- Q. How do you calculate the secondary turn of a transformer?
- Q. How do you calculate primary current rating?
Q. How do you fix phase imbalance?
A building monitoring system protects against premature equipment failure by monitoring for several common fault conditions including phase unbalance. Notifying operators to turn off equipment or motors in real-time has been proven to help correct phase imbalances before damage occurs.
Q. What causes high voltage in a transformer?
The main cause of these voltage surges in power system are due to lightning impulses and switching impulses of the system. But over voltage in the power system may also be caused by, insulation failure, arcing ground and resonance etc.
Q. What happens if a too much high voltage is applied to a transformer?
too much over voltage and the primary will burn up. The core saturates and allows high peak currents to flow in the primary and consequently it will burn up.
Q. Is 270 volts too high?
Voltages that high might damage many things. Bulgarian mains is nominally 230 VAC 50 Hz and 220 – 240 VAC would be expected. 270/230 = +17 %.
Q. What are the reasons for over voltage on transformer secondary?
Abstract – When an unloaded power transformer is switched on via a relatively long cable, sometimes ex- treme high voltages appear at the secondary side of the transformer. These overvoltages are caused by a resonant phenomenon that occurs when the resonant frequencies of the transformer and the cable match.
Q. How do you reduce the secondary voltage of a transformer?
to lower the secondary voltage you must remove turns from the secondary winding. This will increase the available current since the power in = power out (neglecting losses). HOWEVER, as you increase current available the winding wire must increase in size to accommodate the current without a flame out.
Q. Why is there a voltage drop at the secondary terminals of a transformer when the load increases?
Voltage drops occur when loads are increased because an increase in current occurs, which depletes source capacity.
Q. Why does the primary current in a transformer increase when a load is connected across the secondary?
Why does the current in a transformer’s primary coil change when a load is attached to the secondary coil? When a load is attached to the secondary, the secondary current sets up a magnetic field that opposes the field set up by the primary current.
Q. What is the magnetizing current in a transformer is rich in?
Also, the magnetizing inrush currents are rich in harmonic content, usually have a high direct current component, and may erroneously trigger transformer overcurrent protections [2].
Q. How do you find the primary and secondary current of a transformer?
In other words, i1/i2 = V2/V1. For example, if the current and voltage drop through the secondary coil is 3 amps and 10 volts, and the voltage drop through the primary coil is 5 volts, then the current through the primary coil is 10/5 * 3 = 6 amps. So the secondary has less voltage and more current.
Q. How do you calculate the secondary turn of a transformer?
According to Faraday’s Law, you can calculate the voltage induced in the primary or secondary windings of the transformer by calculating N x dΦ/dt. This also explains why the transformer turns ratio of the voltage of one part of the transformer to the other is equal to the number of coils of one to the other.
Q. How do you calculate primary current rating?
If for some reason you need a larger transformer to operate appliances, you still divide the wattage by the voltage to find the current. For a 120-volt primary, 2000-watt transformer, divide 2000 by 120 for the current (2000 Watts /120 volts =16.67 amps). For a 240-volt, 3000-watt transformer, the current is 12.5 amps.
