Green Energy
-In healthy state, the machine 3rd harmonic voltage is distributed over the windings such that the maximum occur at the star point neutral and at the line terminal. For a ground fault close to the neutral, all the 3rd harmonic voltage is transferred to the line terminals. Consequently, the relay function will see a 3rd harmonic under voltage at the neutral end and will operate the protection element.
- Automatic Voltage Regulator (avr)
-I will talk today with you about an important equipment used in power system utilities, it is the Automatic Voltage Regulator (AVR). From its name it is a regulator which regulates the output voltage at a nominal constant voltage level.Role of AVRAVR...
- Generator Temperature Rise Test
Generator Temperature Rise Test From a few days, we have made a test on the Generator’s windings (Stator and Rotor), this test accomplish the temperature rise of the windings at full load is within the Normal range.First, we increased the load to...
- Generator Temperature Rise Test
Generator Temperature Rise Test From a few days, we have made a test on the Generator’s windings (Stator and Rotor), this test accomplish the temperature rise of the windings at full load is within the Normal range.First, we increased the load to full...
- Generator Overvoltage Relay (59 G)
Generator Overvoltage Relay (59 G) Overvoltage shouldn’t occur on a generator fitted with an automatic voltage regulator. Overvoltage may be caused by defective operation of the voltage regulator under isolated operation of the generator. The...
- Phoenix Contact Introduces New Surge Protection Devices For 1,500 Volts
article originally published in www.sunwindenergy.com, on June 26th, 2015Large photovoltaic systems are increasingly using a higher operating voltage of 1,500 V, which makes transmitting the electricity to the inverter more cost-effective. Phoenix...
Green Energy
Generator Stator Earth Fault Relay (64G) - 27TN.
Generator Stator Earth Fault Relay (64G) - 27TN.
-For high impedance grounded generators, a voltage relay across the secondary winding of the generator neutral grounding transformer is used to detect the ground fault on the generator stator winding.
-The neutral over voltage function (59N) responds to the fundamental frequency voltage at the generator neutral that appears when a ground fault occurs.
-Normally, it will protect up to 90≈ 95 % of the stator windings.
-The neutral under voltage functions responds to 3rd harmonic voltage measured at the generator neutral. When used in conjunction with the neutral over voltage function, it provides 100% ground fault protection of the stator winding.
- Automatic Voltage Regulator (avr)
-I will talk today with you about an important equipment used in power system utilities, it is the Automatic Voltage Regulator (AVR). From its name it is a regulator which regulates the output voltage at a nominal constant voltage level.Role of AVRAVR...
- Generator Temperature Rise Test
Generator Temperature Rise Test From a few days, we have made a test on the Generator’s windings (Stator and Rotor), this test accomplish the temperature rise of the windings at full load is within the Normal range.First, we increased the load to...
- Generator Temperature Rise Test
Generator Temperature Rise Test From a few days, we have made a test on the Generator’s windings (Stator and Rotor), this test accomplish the temperature rise of the windings at full load is within the Normal range.First, we increased the load to full...
- Generator Overvoltage Relay (59 G)
Generator Overvoltage Relay (59 G) Overvoltage shouldn’t occur on a generator fitted with an automatic voltage regulator. Overvoltage may be caused by defective operation of the voltage regulator under isolated operation of the generator. The...
- Phoenix Contact Introduces New Surge Protection Devices For 1,500 Volts
article originally published in www.sunwindenergy.com, on June 26th, 2015Large photovoltaic systems are increasingly using a higher operating voltage of 1,500 V, which makes transmitting the electricity to the inverter more cost-effective. Phoenix...