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  and the average open voltage superimposed will be below the normal range of the open-gate threshold voltage, a typical non-start failure and a short-circuit fault are bed. Because the opening voltage of the lock door is controlled by multiple circuits, which involves a wide range, it often complicates the problem. Especially when the fault characteristics are not obvious, it is easy to make wrong judgment. The loss of voltage protection circuit of medium frequency converter is a protection circuit which is set up to turn off the driving signal of the inverter circuit when the power is off or the fault trip. When the negative-voltage filter capacitor C1 capacity of the Protection Circuit is reduced, it will affect the normal work of the lock door and bring about complex fault phenomenon. It is a key step to find and solve the abnormal phenomena such as hiccup voltage by measuring the open voltage waveb of the sealed door with oscilloscope.

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6638910B1   638910B1PS0084

DSBC174 3BSE012211R1

6638910B1   638910B1PS0084  由【廈門興銳嘉進出口有限公司】優(yōu)惠供應.