First, the function of the ring network cabinet panel

The picture above shows the two power supply lines of the XGN15_12 ring network cabinet, 1# cabinet is the first power supply intake cabinet 201, (2 of 201 represents 10KV, 0 represents the transformer at the upper level of the first power supply, 1 represents the first way into the line), cabinet 2 is the metering cabinet of the first power supply, and cabinet 3 is the outlet cabinet of the first power supply No. 1 transformer power supply line 211 (2 represents 10KV, 11 represents the first way out of the first incoming power supply)

Cabinet 6 is the second power supply entry cabinet 202 (2 represents 10KV, 0 represents the transformer at the upper level of the second power supply line, 2 represents the second way inlet), cabinet 5 is the metering cabinet of the second power supply, and cabinet 4 is the power input line of the second power outlet cabinet No. 2 transformer 221 (2 represents 10KV, 21 represents the first outlet of the second incoming power supply)

The picture above is the first line cabinet 201, the upper end of the incoming cabinet has a load switch gas pressure gauge, the right end has an operating hole, live display, opening and closing status indicator, and the lower cabinet door can only be opened if the grounding switch is closed in the cabinet power failure state.

The picture above is the upper end of the No. 1 entry cabinet, we see that there are 3 small square holes above the operating hole, the ground display of the load switch on the left, which is yellow, and the load switch opening indication in the middle is white. On the right is the load switch closing indication, which is red. There is a movable interlock plate under the operating hole, on which there are signs such as opening, testing, locking, operation, etc.

Second, the incoming cabinet 201 (1# incoming unit) power transmission operation

1. Make sure that the door panel under the front door of the incoming cabinet has been covered

2. Tap grounding switch

Our first step is to move the interlock plate (under the operating hole) to the experimental position, the lower door panel is locked, at this time the operating handle can be inserted into the switch operation hole, the sub-wiring switch, along the direction of the interlock plate tap grounding switch, rotate 90 degrees to the left until you can hear the sound of the opening gate, you can determine that the grounding switch has been opened.

3. Combined load switch

We first move the mobile interlock plate to the operating position, we can insert the handle, follow the direction of the interlock plate load switch, rotate 90 degrees to the right until we hear the closing sound, determine that the load switch has been closed, and the closing shows that the small square hole is red.

Third, outlet cabinet 211 (1# transformer unit)

1. Precautions before operation

Before operation, you should see the identification of the panel, there are 3 small square holes above the operation hole, and the time load switch on the left is grounded, which is yellow. In the middle is the load switch opening display, which is white. On the right is the load switch closing indicator, which is red. There is also a fuse indicator on the far right, which is red, and white when the fuse is blown out.

There is a movable interlock plate under the operating hole with door opening, test, locking, operation, fuse indication.

2, outlet cabinet 211 (1#, transformer unit) power transmission operation

1, We must first make sure that the door panel under the front door has been covered

We have to first move the mobile interlock plate to the test position, the lower door panel is locked at this time, we can insert the operating handle into the operation hole of the switch cabinet at this time, we start to tap the grounding switch, we follow the direction of the interlock plate tap the grounding switch, rotate 90 degrees to the left until you can hear the opening sound, you can determine that the grounding switch has been opened.

We first move the mobile interlock plate to the operating position, we can insert the operation handle, we follow the direction of the interlock plate load switch, rotate 90 degrees to the right until we hear the closing sound, make sure that the load switch has been closed, and the closing shows that the small square hole is red.

4, the place we should pay attention to when closing

1. After the fuse is fused and opened, we should first turn the operating axis counterclockwise by 90 degrees to return it to the vertical position

2, When we close, we must use enough force to rotate in a clockwise direction in place at one time until we hear the closing sound.

Fourth, the whole station power outage maintenance

1. Disconnect the low-voltage capacitor

2. Disconnect all outlet switches of the low-voltage cabinet

3. Disconnect the low-voltage main switch 401 or 402

4. Disconnect the high voltage outlet cabinet 211 (1# transformer unit)

A, load distribution switch

We will drive the interlock plate to the test position, insert the operation handle, we follow the interlock plate load switch direction, rotate 90 degrees to the left until you hear the opening sound, the opening gate shows that the small square hole is white, you can determine that the load switch has been opened.

B, and grounding switch

We first move the mobile interlock plate to the test position, insert the operation handle, we follow the direction of the interlock plate to the grounding switch, rotate 90 degrees to the right until we hear the closing sound, that is, the grounding switch has been closed, the grounding display shows that the small square hole is yellow, then we move the interlock plate to the door opening position, and the lower door panel can be opened

5, disconnect the high voltage incoming cabinet 201 (1#, incoming unit)

We plug the operation handle, follow the direction of the load switch of the interlock plate, rotate 90 degrees to the left until you hear the sound of the opening gate, the opening gate shows that the small square hole is white, which can confirm that the load switch has been opened.

B, Combine the grounding switch

We first move the mobile interlock plate to the test position, insert the operation handle, follow the direction of the interlock plate to the grounding switch, rotate 90 degrees to the right until we hear the closing sound, the grounding display is yellow, that is, the ground has been closed. At this time, we can move the interlock plate to the opening position, and the lower door panel can be opened.

The 202 and 221 of the second power supply are the same as the first power stop

Fifth, the structural composition of the XGN15_12 of the high-voltage switchgear

Sixth, the use of high-voltage switchgear XGN15_12

Seven, the working environment requirements of the XGN15_12 of the high-voltage switchgear

Eight, the structure of the load switch SF6 XGN15_12 high voltage switchgear

Nine, high-voltage switchgear XGN15_12 load switchgear structure

XGN15_12 unit metal enclosed ring network cabinet switchgear is SF6 load switch as the main switch and the whole cabinet is air-insulated, suitable for power distribution automation, compact and expandable metal sealed pen ring network switchgear. It has the characteristics of simple structure, flexible operation, reliable interlocking and easy installation. For a variety of different applications, different user requirements can provide reasonable technical solutions.

XGN15_12 metal closed ring network cabinet equipment can use SF6 load switch, can also use VS1, VD4 / S and other vacuum circuit breakers, the vacuum circuit breaker in the ring network cabinet adopts fixed installation, load switch and vacuum circuit breaker can be manually or electrically operated, optional electric operation mechanism, but also can realize distribution automation function.

XGN15_12 unit type metal closed ring network switchgear is suitable for power systems with rated voltage of 12KV and rated frequency of 50HZ, which is widely used in industry and civil use.

The main use of the site, urban residential areas and industrial and mining enterprises power distribution, small substations, opening and closing offices, box substations, shopping malls, airports, subways, wind power generation, stadiums, railways, bridges, tunnels and other places.

1. The altitude does not exceed 2000 meters

2, ambient temperature requirements, the minimum temperature – 25 degrees Celsius, the maximum temperature +49 degrees Celsius.

3. Ambient humidity, the daily average does not exceed 95%, and the monthly average does not exceed 90%.

4. Seismic resistance level 8.

5. There is no explosive and corrosive gas in the surrounding air, and there is no violent vibration shock according to the place.

Eight, high-voltage switchgear XGN15_12 load switch SF6

structure

SF6 load switch, mainly used in power distribution rooms or substations.

SF6 structural features

1, the use of double break, rotary moving contact, right three states, closing, opening, grounding.

2, using SF6 as arc extinguishing and insulation medium, the switch is sealed by the upper and lower shells cast by epoxy resin, and the insulation performance is good.

3. The relative pressure of SF6 gas on load switch is 0.045Mpa.

4. The mechanical life of the load switch is 5000 times – combined, 2000 times – grounding.

5. The load switch and the operating mechanism are installed in the detachable upper part of the unit, which can easily change the load switch cabinet into a load switch ten fuse combination electrical cabinet, or vice versa.

Operating mechanism

1, FLN36-12 with K-type operating mechanism, used in the wire entry cabinet, with three-position interlock function, can manually or electrically make the main switch break and close, can manually make the grounding switch break and close, with the main switch and grounding switch mechanical position indication.

2, FLN36-12 with A-type operating mechanism, used for the outlet cabinet, with three-position interlock function, can manually or electrically make the main switch break and close, can be operated by button trip or trip device to trip the main switch, can manually make the grounding switch break and close, with the main switch and grounding switch mechanical position indication.

Nine, high-voltage switchgear XGN15-12 load switchgear structure

XGN15_12 type load switchgear is mainly composed of four parts

1, busbar room

The busbar is arranged in the upper part of the cabinet, and in the busbar room, the main busbar is connected together and runs through the entire row of switchgear.

2. Load switch

A variety of load switches can be selected, the shell of the load switch is made of epoxy resin casting, filled with SF6 gas as arc extinguishing and insulating medium, and the load switch can be equipped with qieSF6 barometer and observation hole.

3. Cable room

Load switch has a wide cable room, mainly used for the connection of power cables, so that single-core or three-core cables can be connected using the simplest non-screen cable head indoor terminal, while ample space can also be installed with arresters, current transformers, voltage transformers, etc., as a standard configuration, the cabinet door has a safety interlock device for observation windows, the cable bottom plate is provided with a cable sealing ring according to requirements, equipped with a support frame and a cable clamp of a suitable size, the cable room bottom plate and the door front frame can be removed, which is convenient for cable installation.

4. Low pressure chamber

The operating mechanism, interlocking mechanism and low-voltage control room interlocking low-voltage room at the same time play the role of control panel, low-voltage room is equipped with a spring operating mechanism and mechanical interlocking mechanism device with WeChat indicator, can also be equipped with auxiliary contacts, capacitive live display, key lock and electric operation device, while the low-voltage room space can also be equipped with control loops and measuring instruments, 750mm wide ghost is equipped with two identical low-voltage chambers, can be installed with more accessories

High-voltage switchgear five proof

1, to prevent mis-separating circuit breaker A circuit breaker handcart must be in the working position or test position, the circuit breaker can be divided and closed.

2, to prevent the load mobile circuit breaker handcart A circuit breaker handcart can only be pulled out or pushed into the working position when the circuit breaker is in the opening state.

3, to prevent live connection grounding switch a circuit breaker hand trolley must be in the test position, the wiring switch can be closed.

4, to prevent the grounding switch from transmitting power when the grounding switch must be in the opening position, the circuit breaker hand trolley can be pushed into the working position for closing operation.

5, to prevent mistakes into the live interval a circuit breaker hand cart must be in the test position, the grounding switch is in the closed position, can only open the back door, no grounding switch switch cabinet must be after the high-voltage power failure (open the rear door electromagnetic lock), can open the back door.

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2. Tap grounding switch

3. Combined load switch

A, load distribution switch

Fifth, the structural composition of the XGN15_12 of the high-voltage switchgear

Sixth, the use of high-voltage switchgear XGN15_12

Seven, the working environment requirements of the XGN15_12 of the high-voltage switchgear

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