What are the operating procedures of high voltage switchgear?

It is strictly forbidden to disconnect the current circuit, and it is strictly prevented from short circuit or grounding.

1. To work on a fully and partially energized disk, the maintenance equipment and the operating equipment should be separated by obvious signs.

2. The secondary winding with current transformer and voltage transformer should have permanent and reliable protective grounding.

3. The following safety measures should be taken when working on the secondary circuit of the current transformer in operation:

4. In order to reliably short circuit the secondary coil of the current transformer, it is necessary to use short-circuit pieces and short lines, and it is forbidden to use wire winding.

5. It is forbidden to carry out any work on the circuit and wire between the current transformer and the short-circuit terminal.

6. When working on the secondary circuit of the voltage transformer in operation, the following safety measures should be taken:

7. Insulated tools should be used, insulated gloves should be worn, and the relevant relay protection devices should be deactivated before work if necessary.

8. When connecting the temporary load, it must be equipped with a special switch and fuse.

9. During the energizing test of the secondary circuit, in order to prevent the reverse voltage from the secondary side to the primary circuit, in addition to disconnecting the secondary circuit, the primary fuse should also be removed.

1. Semi-enclosed high-voltage switchgear.

The components below the ground in the high-voltage switchgear are installed in the high-voltage switchgear in the grounded metal shell, and the busbars or isolation switches above are not enclosed by the metal shell.

2. Metal-enclosed high-voltage switchgear.

In addition to the inlet and outlet lines, the high- and low-voltage electrical components and auxiliary circuits are completely installed in the high-voltage switchgear in the grounded metal housing. There are three types of metal-enclosed high-voltage switchgear: metal-armored high-voltage switchgear, spaced high-voltage switchgear, and box-type high-voltage switchgear.

3. Metal armored high-voltage switchgear.

Some components are housed in a metal-enclosed high-voltage switchgear in a compartment separated by a grounded metal partition.

4. Spaced high-voltage switchgear.

Some components are housed in separate compartments (as in metal-armoured high-voltage switchgear), but metal-enclosed high-voltage switchgear with one or more non-metallic partitions should be IP2x IP5x (or higher).

5. Box-type high-voltage switchgear.

In addition to the armored and spaced high-voltage switchgear, the metal-enclosed high-voltage switchgear has the characteristics that the number of compartments is less than that of the metal-armored switchgear and the spaced switchgear, the protection level of the partition is lower than that specified in the above table, and there is no separate compartment.

6. Insulated enclosed high-voltage switchgear.

In addition to the inlet and outlet, the high-voltage switchgear and the control part are completely enclosed by an insulated shell.

I don't understand this question, switch cabinet operation power supply? Circuit breaker operating power supply?

The 10kV distribution room is generally not equipped with protection, its operating power supply is mainly said to be the circuit breaker operating power supply, the circuit breaker is broken through the low-voltage power supply control relay to make the circuit breaker action, most of them are DC, and a small part is AC, according to the design requirements and different, the voltage can also be obtained from the low-voltage side of the voltage transformer, and the voltage transformer also provides metering. I think that the operating power supply of your unit is mainly the power supply of the voltage transformer, and the battery is the backup, and the UPS should provide backup power to the computer or some important but not very large load equipment.

There are those with DC operation power supply, and there are also those with AC operation power supply.

It is broadly divided into three types, digital control, analog control, and mechanical control.

There is a single power supply. Dual-circuit power supply.

High-voltage switchgear refers to the power system power generation, transmission, distribution, power conversion and consumption in the role of on-off, control or protection, high-voltage switchgear according to the voltage level of electrical products, high-voltage isolation switch and grounding switch, high-voltage load switch, high-voltage automatic overlap and sectionalizer, high-voltage operating mechanism, high-voltage explosion-proof power distribution device and high-voltage switchgear and other categories.

High voltage switchgear model.

K-armoured Y-move-out.

n- Indoor installation.

28- Design serial number.

a- Improvement number.

12- Voltage level.

KYN28A-12 indoor metal armored withdrawable switchgear is mainly used for power plants, industrial and mining enterprises and secondary substations of power systems, power receiving, power transmission and starting of large motors. For control, protection, real-time monitoring and measurement. It has a perfect five-proof function.

High-voltage switchgear structure.

The switch cabinet is divided into a trolley room, a bus room, a cable room and a relay instrument room by a partition, and each unit is well grounded.

a-Bus room.

The bus room is arranged in the upper part of the back of the switch cabinet, which is used for installing and arranging the three-phase high-voltage AC bus and connecting with the static contact through the branch bus. All bus bars are molded with insulating sleeves.

When the bus passes through the switch cabinet partition, it is fixed with a bus sleeve. In the event of an internal fault arc, it can limit the spread of the accident to the adjacent cabinet and ensure the mechanical strength of the busbar. b- Hand car (circuit breaker) room.

Specific rails are installed in the circuit breaker chamber for the circuit breaker hand cart to slide and work. The trolley can be moved between the working position and the test position. The partition (valve) of the static contact is mounted on the rear wall of the handcart chamber.

When the handcart moves from the test position to the working position, the partition automatically opens, and the handcart moves in the opposite direction to fully composite, thus ensuring that the operator does not touch the charged body.

High voltage switchgear standard.

KYN indoor AC metal armored removable switchgear (referred to as handcart cabinet) is designed and manufactured according to the "3-35KV AC metal-enclosed switchgear" according to the IEC298 "AC metal-enclosed switchgear and control equipment" standard, and can also meet the requirements of the Ministry of Water and Power that the high-voltage switchgear should have the "five prevention" function.

Medium and high-end mainstream cabinet types, mainly commonly used the following specifications. a. KYN-10 indoor AC metal armored removable switchgear (referred to as handcart cabinet) handcart cabinet is suitable for AC 50Hz rated voltage of 3-10kV center point ungrounded single bus and single bus segmented system indoor complete sets of power distribution devices, for various types of power plants, substations and industrial and mining enterprises as the acceptance and distribution of network power to control and protect the circuit.

The role of high-voltage switchgear.

The function of the switchgear is to break the high-voltage circuit, which is the main equipment of the high-voltage switchgear. The bus bar and the cable are connected to the effect, and under normal circumstances, the bus is connected with the system side, which is equivalent to the high-voltage **, and then connects with the cable through the switch. The load carried by the cable connection switch.

It can be a transformer, a motor or other equipment.

Opening process:1circuit breakers; 2.Separate and segregated; 3.Divide into upper closure isolation; 4.Open the door of the cable room and check the electricity; 5.hook grounding;

Closing process:1remove the grounding; 2.Close the cable room door; 3.Close the isolation; 4.Close the lower isolation; 5.Closing circuit breaker;

、 Power transmission operation procedure: 1Push the circuit breaker handcart (or PT handcart, isolation handcart, fuse handcart) into the switch cabinet through the handcart transfer trolley; When the handcart enters the cabinet, pull the left and right handles of the handcart inward to the handle position at the same time and push the handcart into the test position of the switch cabinet, and then push the left and right handles of the handcart outward to the handle position at the same time, so that the handcart propulsion mechanism and the switch cabinet are reliably locked.

2.Insert the secondary plug of the handcart into the secondary socket of the switch cabinet and lock it with a fastener; 3.Close the back door of the switch cabinet (cable room door) and the front door (circuit breaker room door); Open the grounding knife operating valve, use the grounding knife operating handle (counterclockwise) to open the grounding knife, pull out the grounding knife operating handle to close the grounding knife operating valve, and confirm that the grounding knife is in the open state.

4.Check that the power switch (or secondary fuse) such as control, closing, signal, AC and bus voltage in the instrument room is in the closed state, and measure that the power supply voltage is within the normal range, and then close the instrument room door.

Hello, here is VS1 (ZN63) high-voltage switch chassis animation demonstration, chassis composition and assembly animation.

Hope it helps.