3BHE014185R0001 UUD148AE01 ABB current transmitter supply

Description

UUD148AE01 system output over-current and overloadUUD148AE01 fault phenomenon:
(1) During the normal operation of the frequency converter, the system output over-current or output overload fault causes the frequency converter to shut down due to serious fault.
(2) System output overload or system over-current fault shutdown of frequency converter during speed increase
(3) The inverter reports output overcurrent during startup.

UUD148AE01 fault reason:
(1) The possible causes of sudden output overload or overcurrent of frequency converter during normal operation are bus voltage fluctuation, sudden increase of load startup, or excessive frequency conversion current collection caused by frequency conversion output current sampling circuit fault.
(2) The fault of current sensor or the fault of main board signal acquisition circuit leads to the malfunction of frequency converter.
(3) The output overload or overcurrent of the frequency converter during speed increase is mainly due to the fast speed increase time.
(4) Due to the load during the startup of the frequency converter (mainly because the fan is in reverse rotation due to its effect on the side fan), the inverter is in the slip state or the motor load is locked.
UUD148AE01 Solution:
(1) During the normal process, the sudden overload and overcurrent of the frequency converter is mainly to confirm what causes the tripping. If it is caused by the change of the power grid or sudden load change, restart the frequency converter. If it is caused by the fault of the frequency converter acquisition circuit itself, check the corresponding wiring and Hall sensor.
(2) During the speed raising process of the inverter, if the system output overload or system over-current causes a fault shutdown, the corresponding up and down speed raising time should be modified and the time should be set as large as possible.
(3) Ensure that the fan load is at rest during startup; Modify the DCS startup logic of the fan, close all inlet and outlet baffles before starting the motor, and then open them after starting to avoid current impact; Start the frequency converter after starting the power frequency; Set the torque increase in the function number to increase the starting torque of the inverter.
DC over-voltage of module
Fault phenomenon
(1) During the shutdown and speed reduction of the frequency converter, the module DC over-voltage fault occurred for many times, which led to the tripping of the user’s high-voltage switch.
(2) The user’s bus voltage is too high, the actual bus of 6KV power supply is above 6.3KV, and the actual bus of 10KV power supply is above 10.3KV. When the bus voltage is applied to the frequency converter, the module reports DC bus overvoltage.
(3) During the startup of the inverter, the DC bus of the inverter is overvoltage when the inverter runs to about 4HZ.
Failure cause:
(1) The motor is in the generator state due to too fast speed reduction time of the inverter during shutdown, and the motor feeds back energy to the module’s DC bus to generate pump up voltage, which makes the DC bus voltage too high.
(2) Since the factory standard wiring of the on-site transformer is 10KV and 6KV, if the bus voltage exceeds 10.3KV or 6.3KV, the output voltage of the transformer will be too high, which will cause the bus voltage of the module to rise and cause overvoltage.
(3) The optical fibers of different phase modules at the same location are inversely connected (for example, A4 and B4 optical fibers are inversely connected), causing the phase voltage output overvoltage.
resolvent:
(1) Extend the upper deceleration time and deceleration time appropriately.
(2) Increase the overvoltage protection points in the module to 1150V.
(3) When the user voltage reaches above 10.3KV (6KV), the transformer short circuit terminal is changed to 10.5KV (6.3KV).
(4) Check whether the optical fiber is inserted incorrectly and correct the wrongly connected optical fiber.

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