GE EVMECNTM13 Redundant system power module

Description

The PT EVMECNTM13 voltage drop problem is a common problem in power generation, transmission, transformation, and distribution enterprises. It causes deviations in system voltage measurement, which not only affects the quality of power system operation, but also directly leads to energy metering errors. This metering error is directly attributed to the comprehensive error of energy metering.
In recent years, secondary wiring faults of voltage transformers have frequently occurred, directly affecting the safe operation of the secondary circuit and causing certain economic losses to manufacturers. Voltage transformers are important components of the primary and secondary circuits, providing power to measuring instruments, relay coils, etc., and accurately reflecting the normal operation of electrical equipment. Fault phenomenon: Most of the 35kV bus voltage transformers use model EVMECNTM13 , with a voltage ratio of (please refer to reference [6]). Every year during the rainy and rainy seasons in spring and autumn, or when the weather is humid or foggy, the central control room often sends out single-phase grounding or voltage reduction signals. After the duty personnel switch the voltage meter, if one or two phase voltage indicators decrease, and the other two or one phase voltage indicators remain unchanged, report to the elevator control center and request the second electrical and gas shift to come for processing

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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