I. The 4 states of electrical equipment are:
Running state, hot standby state, cold standby state and maintenance state.
Second, the four states are as follows:
1, running state
is the connection of the equipment circuit breaker, disconnecting switch (fuse, load switch, etc.) are in the closed position, the equipment has been with the nominal voltage, and relay protection, automatic devices and control power to meet the operating requirements of the equipment state
2, hot standby
This is the electrical equipment has been in a state of hot standby
It means that the electrical equipment has the operating conditions, but the equipment is not yet charged; connected to the equipment on all sides of only one disconnection point; and relay protection, automatic devices and control power to meet the operating requirements of the equipment state.3, cold standby
is the connection of the equipment circuit breaker, disconnecting switch (fuse, load switch, etc.) are in the disconnected position, and the relay protection, automatic devices and control power supply out of operation; connected to the equipment on all sides of the safety measures, the equipment on all sides of the state of the voltage has not been carried.
4, maintenance state
is that all circuit breakers and disconnecting switches of the electrical equipment are disconnected, and the electrical duty officer arranges safety measures in accordance with the "Electricity Safety Regulations" and the requirements of the work ticket.
The law of inverting operation of electrical equipment is based on the above four stages, but after removing the grounding wire of the maintenance equipment, the insulation resistance should be measured and qualified before converting to another state.
Extended information:
Electric power in our life and production play an important role can not be ignored, which brings us great convenience, become an important energy source in our production and life. Power plants can make the normal operation of electricity and transmission of the most critical factor is the electrical equipment.
Normal state of electrical equipment and control measures:
The understanding of the power system needs to be grasped as a whole, the power system is composed of the engine, transformer and other power equipment, power generation, transmission and power functions in one system.
The load of the power system is with the user's power consumption is constantly changing, and to provide high quality power assurance is an important goal of the power companies and work, which needs to meet the power system generator power and no power according to the changes in the electrical load to make the changes within the safety range.
To achieve this purpose requires electrical equipment can operate normally, to meet the needs of various changes in the situation to ensure that the engine of each device can run at the same frequency at the same time.
In practice, in order to make the power system in the normal interference does not produce equipment overloading, to prevent the voltage deviation in the normal range, the need to take the appropriate means of regulation, in the need for transitional changes in the operating state, through the adjustment of rotating standby or emergency standby to complete. Ensure the normal operating state of the power system is to provide safe and reliable power security, but also the key to economic efficiency
Reference:
Baidu Encyclopedia-Operating State
Baidu Encyclopedia-Hot Standby State