【Daily Topic】【Electrical Edition 20160729】
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Participation reward: 2 Wealth. Reward for correct answer: 9 Wealth. Question: What is the reason for the fuse on the primary side of a voltage transformer to blow?
The blowing of the primary-side fuse in a voltage transformer during operation may be caused by the following reasons: (1) Faults such as inter-turn, inter-layer, or inter-phase short circuits within its internal coils, as well as ground faults in one phase. ⑵Secondary circuit fault, due to the excessive fuse blowing current selected for the secondary side fuse ； ⑶When one phase of the system is grounded, the voltage rises, or intermittent arc grounding in the system causes the core of the voltage transformer to become saturated; this can lead to a sharp increase in current that may result in the fuse blowing. ⑷Ferroresonance can occur in power systems, resulting in overvoltage or overcurrent on voltage transformers, which may cause fuses to blow
⑴Faults such as inter-turn, inter-layer, or inter-phase short circuits within its internal coils, as well as ground fault in one phase, can occur. ⑵Secondary circuit fault, due to the excessive fuse blowing current selected for the secondary side fuse ； ⑶When one phase of the system is grounded, the voltage rises, or intermittent arc grounding in the system causes the core of the voltage transformer to become saturated; this can lead to a sharp increase in current that may result in the fuse blowing. ⑷When ferroresonance occurs in the power system, overvoltage or overcurrent is generated on the voltage transformers, which may cause fuses to blow.
The blowing of the primary-side fuse in a voltage transformer during operation may be caused by the following reasons: (1) Faults such as inter-turn, inter-layer, or inter-phase short circuits within its internal coils, as well as ground faults in one phase. ⑵Secondary circuit fault, due to the excessive fuse blowing current selected for the secondary side fuse ； ⑶When one phase of the system is grounded, the voltage rises, or intermittent arc grounding in the system causes the core of the voltage transformer to become saturated; this can lead to a sharp increase in current that may result in the fuse blowing. ⑷When ferroresonance occurs in the power system, overvoltage or overcurrent is generated on the voltage transformers, which may cause fuses to blow.
⑴Faults such as inter-turn, inter-layer, or inter-phase short circuits within its internal coils, as well as ground fault in one phase, can occur. ⑵Secondary circuit fault, due to the excessive fuse blowing current selected for the secondary side fuse ； ⑶When one phase of the system is grounded, the voltage rises, or intermittent arc grounding in the system causes the core of the voltage transformer to become saturated; this can lead to a sharp increase in current that may result in the fuse blowing. ⑷When ferroresonance occurs in the power system, overvoltage or overcurrent is generated on the voltage transformers, which may cause fuses to blow.
The blowing of the primary-side fuse in a voltage transformer during operation may be caused by the following reasons: (1) Faults such as inter-turn, inter-layer, or inter-phase short circuits within its internal coils, as well as ground faults in one phase. ⑵Secondary circuit fault, due to the excessive fuse blowing current selected for the secondary side fuse ； ⑶When one phase of the system is grounded, the voltage rises, or intermittent arc grounding in the system causes the core of the voltage transformer to become saturated; this can lead to a sharp increase in current that may result in the fuse blowing. ⑷When ferroresonance occurs in the power system, overvoltage or overcurrent is generated on the voltage transformers, which may cause fuses to blow.
The blowing of the primary-side fuse in a voltage transformer during operation may be caused by the following reasons: (1) Faults such as inter-turn, inter-layer, or inter-phase short circuits within its internal coils, as well as ground faults in one phase. ⑵Secondary circuit fault, due to the excessive fuse blowing current selected for the secondary side fuse ； ⑶When one phase of the system is grounded, the voltage rises, or intermittent arc grounding in the system causes the core of the voltage transformer to become saturated; this can lead to a sharp increase in current that may result in the fuse blowing. ⑷When ferroresonance occurs in the power system, overvoltage or overcurrent is generated on the voltage transformers, which may cause fuses to blow.
The fuse on the primary side of the voltage transformer blows mainly because the voltage transformer is overloaded, with a large current flowing through it. The reasons for overload may include excessive voltage, high harmonic currents, or inter-turn short circuits caused by aging winding insulation, among others.
⑴Faults such as inter-turn, inter-layer, or inter-phase short circuits within its internal coils, as well as ground fault in one phase, can occur. ⑵Secondary circuit fault, due to the excessive fuse blowing current selected for the secondary side fuse ； ⑶When one phase of the system is grounded, the voltage rises, or intermittent arc grounding in the system causes the core of the voltage transformer to become saturated; this can lead to a sharp increase in current that may result in the fuse blowing. ⑷When ferroresonance occurs in the power system, overvoltage or overcurrent is generated on the voltage transformers, which may cause fuses to blow.
The blowing of the primary-side fuse in a voltage transformer during operation may be caused by the following reasons: (1) Faults such as inter-turn, inter-layer, or inter-phase short circuits within its internal coils, as well as ground faults in one phase. ⑵Secondary circuit fault, due to the excessive fuse blowing current selected for the secondary side fuse ； ⑶When one phase of the system is grounded, the voltage rises, or intermittent arc grounding in the system causes the core of the voltage transformer to become saturated; this can lead to a sharp increase in current that may result in the fuse blowing. ⑷Ferroresonance can occur in power systems, resulting in overvoltage or overcurrent on voltage transformers, which may cause fuses to blow
What are the reasons for the fuse on the primary side of the voltage transformer to blow? Answer: 1. Ferromagnetic resonance ； 2. Fuse wire quality issues ； 3. An excessive primary current in PT may cause a secondary short circuit ； 4. Pt breakdown