The solenoid valve is in the high-voltage shutoff module, which is responsible for cutting off the oil circuit in an emergency to ensure the safe shutdown of the turbine. As one of the core components of the solenoid valve, the performance of the MFJ1-4 solenoid coil directly affects the response speed and reliability of the entire system. This article will explore the power and withstand voltage level of the MFJ1-4 coil and propose a method to evaluate its reliability in the high-voltage shutoff module.

The MFJ1-4 solenoid coil is mainly used for AC solenoid valves and is designed for frequencies of 50Hz or 60Hz with a voltage of up to 380V. Although the specific power value may vary with different manufacturers, the MFJ1 series solenoid coils generally have a high power density to ensure a fast response in the high-voltage shutoff module. Its withstand voltage level should also match the system voltage to prevent damage caused by overvoltage.

The reliability of the solenoid coil MFJ1-4 can first be evaluated by a duty cycle test, that is, the solenoid valve is continuously opened and closed under specified voltage, frequency and load conditions. The test should cover thousands or even millions of cycles to simulate the actual working conditions of the solenoid valve during turbine operation. By observing the temperature rise, response time and changes in electrical performance of the electromagnetic coil, its long-term working stability and durability can be evaluated.

The withstand voltage test verifies whether the electromagnetic coil MFJ1-4 can withstand instantaneous impacts higher than the rated voltage to ensure safe operation under accidental overvoltage conditions. The insulation resistance test is used to check the insulation performance between the coil windings to prevent short circuits. These two tests are crucial to evaluating the safety of the electromagnetic coil in the high-voltage tripping module.

When the turbine is running, vibrations and shocks will be generated, which may damage the structure of the electromagnetic coil. Vibration tests and shock tests can simulate these environmental conditions and evaluate the mechanical strength of the electromagnetic coil and the reliability of the fixed structure.

Considering the complexity of the turbine operating environment, the electromagnetic coil should be able to work normally in different temperatures, humidity and corrosive environments. Environmental adaptability tests include high and low temperature cycles, humidity tests and salt spray tests to ensure that the electromagnetic coil can maintain its function in harsh environments.

Through these comprehensive tests, it can be ensured that the electromagnetic coil MFJ1-4 can still maintain stable performance and a long service life when facing the stringent requirements of the high-voltage tripping module, thereby providing a solid guarantee for the safe operation of the turbine.

Yoyik offers various types of valves and pumps and its spare parts for power plants:
cushion for PUMP ALD320-20X2
Minor Repair Kit for Three-Piece/Bolted Ball Valve Size : 1″ 1/4, Pressure rating : 2000WOG (PN130), Items : #5, #6, #7, #8
OIL PUMP SQP32-38-14VQ-86-DD-18
Butterfly valve D71X3-10
axial pump hydraulic PVH098R01AD30A250000002001AB010A
Solenoid valve 4WE10G31/CW22050N9Z5L
Skeleton oil seal 589332
2 screw pump HSND280-46
Shaft seal ring type O DN80 M3270 M3270
Single Stage Centrifugal Pump YCZ50-250
line stop valve WJ60F-1.6P
Bellows valves WJ20F-1.6P
Bellows valves WJ60F-25P
solenoid valve 24 volt dc SV4-10V-C-0-00
accumulator charging kit LNXQ-A-10/20 FY
Isolation valve F3DG5S2-062A-220DC50-DFZK-V/B08
electric centrifugal water pump DFB125-80-250
Hydrogen emission main valve PTFE valve core WJ61-F
solenoid valve J-110VDC-DN6-U/15/31C
SERVOVALVE HYDRAULIC SM4-20(15)57-80/40-10-S182