GE PMC422-LAM D2 Redundant system power module

Description

The literature indicates that the voltage drop in the secondary circuit of the 110 kVI voltage transformer in a certain power plant is 0.62%. The voltage drop of the secondary circuit of the 110kVI voltage transformer exceeds the standard, which directly affects the accurate measurement of the energy meter metering device at the gateway of generator 3. The average annual online electricity consumption of Unit 3 is 200 million kilowatt hours, with a loss of electricity of △ W=W * 0.62%=124000 kWh, which means an annual loss of electricity of 1.24 million kilowatt hours.
From the above examples, it can be seen that the secondary voltage drop of PT directly affects the accuracy of electrical energy measurement. Due to the unidirectional nature of the secondary voltage drop of PT, power companies miss the calculation of electrical energy, resulting in huge economic losses; At the same time, it is also a potential threat to the safe operation of the power system.
2、 Wiring form of secondary circuit of voltage transformer
During on-site operation, different wiring configurations were used for the secondary circuit of voltage transformers according to different voltage levels
Equation.

Main technical parameters:
Accuracy: ± 5% F? S
Alarm mode: digital display
Alarm sound: ≥ 70Db
Response time: ≤ 30S
Recovery time: ≤ 60S
Resolution: ± 1Ppm ± 1% LEL
Security level: Exd II Ct3
Measurement range: (0-100) PPm/(0-1000) PPm/(0-100)% LEL
Working environment: Temperature: -20 ℃~60 ℃
Humidity: ≤ 95% RH without frost formation
Charging voltage: 4.2-4.7V
Charging time: 8-12 hours

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