What can cause a DC bus overvoltage fault?

Probable cause:

  • Braking too sudden or driving load.
  • Braking unit option cannot convert the “braking energy” into heat.
  • Overvoltage at the input.
  • Motor short to ground.

What causes motor overvoltage?

Overvoltage occurs when the supply voltage rises above the rated voltage of the motor or equipment and this can cause excessive current to flow as well as creating excessive voltage stresses.

What would cause an overvoltage?

Overvoltage can be caused by poor regulation of a power source from a utility company, oversized transformers, uneven or varying circuit loading, wiring errors, and electrical insulation or isolation failures.

What causes over voltage on a VFD?

The most common time a VFD overvoltage fault occurs is during deceleration. Sometimes the braking torque requirement exceeds drive braking circuit capacity. Other times the deceleration is too fast for its load and inertia from the load is going faster than the designated frequency.

Can a bad motor cause overvoltage?

Short circuits and ground faults in the motor wiring or motor, or in the drive itself, can also cause overvoltage faults. Check the condition of the load wiring and the motor to ensure they are not the cause of the problem.

What does bus voltage mean?

In power engineering, a “bus” is any graph node of the single-line diagram at which voltage, current, power flow, or other quantities are to be evaluated. This may correspond to the physical busbars in substation.

What does bus voltage too high mean?

This Error occurs when the internal bus voltage exceeds its expected limits. This can be caused by several causes, one of them is that both the solar and battery module are trying to create/maintain the internal bus voltage, causing the voltage to rise rapidly.

How can overvoltage be prevented?

There are many different ways to protect your circuit from overvoltage. The simplest way is to connect the fuse at the input supply side. But the problem is that it’s a one-time protection, because as the voltage exceeds the preset value, the wire inside the fuse will burn and break the circuit.

What are the two main reasons cause transient overvoltages in a power system?

The two major causes of transient overvoltages, lightning surges and switching surges, have been identified with greater precision in low-voltage ac circuits as well as in communication systems.

What is an overvoltage trip?

The motor is driving a high-inertia load. Trying to slow down or speed up a high-inertia load at any rate can certainly cause the drive to trip on overvoltage. The load will want to keep spinning more than what the drive can produce to affect it.

What is a high voltage bus?

High voltage bus means the electrical circuit, including the coupling system for charging the REESS, that operates on a high voltage.

What does low bus voltage mean?

During the battery managers startup procedure, the PowerRouter has detected that the internal Bus voltage is too low. As batteries are supplying the energy for the battery manager, it is an indication that the connected batteries are empty/discharged or even damaged.