Help, what is this?

2021-03-13View Original

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What is this in the system power cabinet?

Reply #22021-03-13

The label LF probably refers to the excitation coil; take a look at the drawings to see what is connected to this circuit specifically

Reply #32021-03-14

Power supply filter. Improve power supply quality. Take a closer look at the device’s nameplate to confirm.

Reply #42021-03-15

low-pass filter

Reply #52021-03-16

Power filters are commonly used in fire protection systems.

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