Green Energy
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- Generator Loss Of Excitation Relay (40g).
Electrical Generator Protection Relays. Electrical Generator is the main source of Electricity at Power Plant, we should make a many methods to protect the Generator from any faults can happen while Operation.The next figure shows the main single line...
Green Energy
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 relay detects the over excitation of generators and transformers by measuring the over voltage.
Data for setting calculation
Generator Voltage------------------------------------19000 V
VT turns ratio ----------------------------------------19000 / 100 V = 190
The max. permissible voltage for continuous load operation --- 105 %
The max. permissible voltage for no-load operation -------------- 110 %
The max. permissible transient overvoltage ------------------------ 120 %
Relay Setting
1- Setting Conditions
The trip pickup is intended for moderate overvoltage of long duration.
Pickup < The max. Permissible transient overvoltage .
= 19000 / 190 * 1.20
= 120 V
2- Settings
| Channel | Pickup | Delay | Function |
| #1 | 106 % | 2.5 Sec. | Alarm |
| #2 | 110 % | 40 Sec. | Trip |
| #3 | 120 % | 3 Sec. | Trip |
- The Free-est Economy In The Americas
OOPS! The Heritage Society is very upset, but I have news for them. NO ONE NOTICED OR CARES 2012 Index of Economic FreedomTop 10 Countries1 Hong Kong 89.9 2 Singapore ...
- We Are All Danes Now!
“Hold your ground, hold your ground. Sons of Gondor, of Rohan, my brothers. I see in your eyes the same fear that would take the heart of me. A day may come when the courage of men fails, when we forsake our friends and break all bonds of fellowship,...
- Palestinian Jokes
So this Palestinian walks into a bar and sits down. The bartender says, “What’ll it be, pal?” The Palestinian goes, “BOOM!” * * * * * * * * * * *...
- Spare Change?
It’s no surprise that Hamas considers the cutoff of foreign money to be “blackmail.” After all, that’s what a teenager always considers the threatened withholding of his allowance to be. “Dad! You can’t do that; it’s not fair!”...
- Generator Loss Of Excitation Relay (40g).
Electrical Generator Protection Relays. Electrical Generator is the main source of Electricity at Power Plant, we should make a many methods to protect the Generator from any faults can happen while Operation.The next figure shows the main single line...