RU82946U1 - CAMERA COMBINED ONE-SIDED SERVICE (KSO-207 "NOVATION") - Google Patents

Abstract

1. One-way service prefabricated chamber, comprising busbars compartment, isolated from each other, busbar compartment, high-voltage compartment with vacuum circuit breaker, bus and line disconnectors, mechanical position indicators of the vacuum circuit breaker, bus and line disconnectors, current transformers and voltage transformers, compartment connections with a linear earthing switch, a mechanical indicator of the position of the linear earthing switch, a zero-sequence current transformer and a transformer auxiliary needs, a relay compartment with control, protection, signaling, measurement and metering devices, while the high-voltage compartment and the connection compartment are equipped with interlocking elements, characterized in that the high-voltage and relay compartments are made on a single metal structure - a retractable monoblock capable of occupying a working position, in which the main circuits are closed, the monoblock is located and fixed in the chamber, the control position at which the main circuits are open, the monoblock is located and fixed in the chamber, and The mounting position is in which the main circuits are open, the candy bar is pulled out of the chamber and locked, and access to the busbar and connection compartments is closed with protective insulating covers, the bus and linear disconnectors are designed to synchronously control a key acting on a single drive with a reducer, windows for bus drives and linear disconnectors and linear earthing are equipped with shutters that allow and prohibit access of the control key to the drives in accordance with the logic for constructing cabinet locks, when

Description

The utility model relates to devices for receiving and distributing electric energy of three-phase alternating current with a frequency of 50 Hz and a voltage of 6-10 kV in networks with an isolated or grounded neutral through an arc suppression reactor.

There are various designs of chambers of prefabricated one-way service (CSR) designed to operate as switchgears in the medium voltage class (RU 25651 U1, Н02В 11/26, 10/10/2002; RU 24894 U1, Н02В 11/26, 08/27/2002; RU 11407 U1 H02G 15/12, 09.16.1999).

However, the well-known CSR has one common drawback - large overall dimensions, due primarily to the wishes of operating organizations seeking to gain comfortable access to electrical equipment that needs periodic maintenance, repair or quick replacement in case of failure.

The KSO 298 series variations are widely represented on the market and are currently the most widely used, having a busbar compartment, a high-voltage compartment with a high-voltage switch located on the withdrawable element, a relay compartment and a connection compartment (RU 41198 U1, Н02В 11/26, 10.10 .2004; RU 52277 U1, НВВ 11/26, 03/10/2006 - prototype).

However, the CSR series 298 overall dimensions are also very significant. Meanwhile, in connection with the continuing steady increase in prices for building materials, as well as the rise in price of lands alienated for electrical construction,

useful areas occupied by switchgears, along with ease of maintenance, come to the fore.

The objective of the utility model is to create the KSO of the 207 series, which compares favorably with similar products of other series in small dimensions, less time spent on maintenance of built-in components, and increased ease of use.

The problem is solved in that in the CSR, containing located in the common housing, isolated from each other, the busbar compartment,

high-voltage compartment with a vacuum circuit breaker, busbar and line disconnectors, mechanical indicators for the position of the vacuum circuit breaker, busbar and line disconnectors, current transformers and voltage transformers,

bay of connections with a linear earthing switch, a mechanical indicator of the position of the linear earthing switch, a zero-sequence current transformer and an auxiliary transformer,

relay compartment with control, protection, alarm, measurement and metering devices,

wherein the high-voltage compartment and the connection compartment are equipped with interlocking elements, -

high-voltage and relay compartments are made on a single metal structure - a sliding monoblock capable of occupying

operating position in which the main circuits are closed, the monoblock is located and fixed in the chamber,

a control position in which the main circuits are open, the candy bar is located and locked in the chamber, and

a repair position in which the main circuits are open, the candy bar is pulled out of the chamber and locked, and access to the compartments of busbars and connections is closed with protective insulating covers,

bus and line disconnectors are made with the possibility of synchronous control of a key acting on a single drive with a gearbox,

the drive windows of the busbar and line disconnectors and the linear earthing switch are equipped with shutters that allow and prohibit access of the control key to the drives in accordance with the logic for constructing cabinet locks, while in the prohibiting position, the shutters can be locked with a padlock.

Thus, the design of the proposed CSR is based on the idea of arranging cell components, such as current and voltage transformers, busbar and line disconnectors, which require frequent periodic inspections, tests and calibrations during operation, together with a high-voltage circuit breaker on a sliding monoblock.

Partial essential features of the utility model contribute to the solution of the problem.

The casing is a prefabricated metal structure made of galvanized steel, the supporting frame connections are made of reinforced steel blind rivets, while the front side of the casing is painted with powder paint.

On the front side of the casing are controls for switching devices, a mimic diagram with mechanical indicators for the position of the vacuum circuit breaker, bus and line disconnectors and a linear earthing switch, as well as control, signaling, measuring and metering devices, while the mechanical indicators are rigidly connected to the drives of the corresponding switching devices.

The busbar compartment is covered by a front protective shield, and side protective chambers in the row of chambers for busbar compartments are installed

screens, the busbar compartment area is illuminated by a 36 V LED.

On the front protective screen of the busbar compartment, there is a viewing window that allows you to control the position of the bus disconnector, on the door of the connection compartment there are viewing windows that allow you to control the position of the linear disconnector and the linear ground electrode.

Emergency unloading holes are made on the rear side of the case, designed to organize the directed discharge of the products of arc burning into the unattended area when a fault occurs inside the cabinet.

To move the candy bar in the repair position, the movable contacts of the busbar and line disconnectors are made with the possibility of moving strictly in the vertical plane and folding inside the candy bar.

The monoblock is made with the possibility of placing in it a nonlinear surge suppressor parallel to the contacts of the vacuum circuit breaker.

In the connection compartment, low-voltage circuits for phasing of high-voltage cables are highlighted, the linear earthing switch is equipped with a quick-acting spring drive and is configured to turn on a short circuit at full current, the area of the connection compartment is illuminated with a 36 V LED.

Non-linear surge suppressors connected in a phase-to-ground circuit are located in the connection compartment

In the connection compartment, there are indicators of the presence of high voltage with terminals for checking the phase rotation capacitive voltage indicators built into the reference insulators.

To connect a voltage transformer or auxiliary transformer before the switchgear is introduced from the connection compartment, a side busbar transition is made to the left or right.

The relay compartment is a cabinet with auxiliary circuit equipment mounted on the front side of the monoblock.

In the relay compartment, local heating is performed for relay devices, the minimum operating temperature of which is above minus 40 ° С.

The locking elements are made mechanical with the possibility of

prohibition of turning on the circuit breaker when the knives of the linear and bus disconnectors are in an intermediate position,

prohibition of operation with linear and bus disconnectors when the circuit breaker is on,

a ban on the inclusion of a linear earthing switch when the line and bus disconnectors are on,

prohibition of the inclusion of linear and bus disconnectors when the linear earthing switch is on,

prohibition of the movement of the monoblock when the switch is in the on state,

a ban on opening the door of the cable compartment of the camera when the linear ground electrode is open.

When using the camera in the switchgear, the interlock elements are made electric with the possibility of

a ban on the inclusion of input when earthing busbars of the corresponding section,

prohibition of turning on the sectional switch, including when automatically turning on the reserve, when grounding busbars of any section,

a ban on the inclusion of an earthing switch of busbars when the input and section switches are turned on.

All metal elements available for touching during operation that may be energized are grounded.

The laying of main busbars of operational circuits is carried out in a box located in the upper part of the chamber and isolated from the busbar compartment, while terminal boxes of main busbars are additionally placed in the box.

Figure 1 shows the structural views of the proposed CSR without a cut and in a section, and Figures 2-4 respectively show a busbar compartment, a monoblock with a high voltage and relay compartments in the extended (repair) position and a compartment of CSR connections.

KSO contains located in a common housing, isolated from each other, the busbar compartment, the monoblock compartment (high-voltage and relay compartments) and the connection compartment (Fig. 1). \

On the left in figure 1 are marked:

in the busbar compartment

box of 1 transit chains,

inspection window 2 of the busbar disconnector,

in the monoblock compartment

mimic diagram 3,

mechanical indicator 4 position busbar disconnector,

mechanical pointer 5 position of the vacuum circuit breaker,

button 6 to manually turn off the vacuum switch,

window 7 access control key to the drive bus and line disconnectors,

mechanical pointer 8 position of the linear disconnector,

relay compartment 9,

in the connection compartment

viewing window 10 of the linear disconnector,

electromagnetic lock 11,

viewing window 12 linear earthing,

a window 13 for access to the ground electrode drive,

mechanical pointer 14 of the grounding position,

bonka 15 grounding.

On the right in figure 1 are marked:

in the busbar compartment

bus disconnector 16,

in the monoblock compartment

vacuum switch 17,

current transformer 18,

in the connection compartment

line disconnector 19,

linear earthing switch 20.

In the process of working with CSR, to extend the monoblock into the repair position (moving to the service corridor) the movable contacts of the bus disconnector 16 and the linear disconnector 19 in the disconnected state are folded inside the monoblock.

When the monoblock is pulled out, access to the busbar compartment and the connection compartment (cable) are automatically closed by insulating curtains. When the monoblock is rolled in, the curtains automatically open.

Monoblock has a fixed working and repair position, excluding spontaneous movement of the monoblock in the CSR.

The control key from the drive can be removed only in one of the extreme (final) positions of the mechanism of the bus disconnector 16, the linear disconnector 19 and the linear ground electrode 20.

The inclusion of the vacuum circuit breaker 17 is carried out by submitting the appropriate command to the inputs of the control unit located in the relay compartment 9, locally or remotely. The inclusion of the switch 17 is subject to the following conditions:

- electrical interlocks do not prohibit the inclusion of the switch 17;

- the shutter of the window 7 for accessing the control key to the drive of the bus disconnector 16 and the linear disconnector 19 is closed, which is equivalent to the fact that the disconnectors 16, 19 are in one of the end positions, the control key of the disconnectors 16, 19 is removed.

After turning on the vacuum switch 17, the mechanical pointer 5 on the mimic 3 indicates its closed position. The opening of the shutter of the window 7 for access of the control key to the drive of the disconnectors 16, 19 is blocked.

The vacuum circuit breaker 17 is turned off by applying the appropriate command to the inputs of the control unit locally or remotely. The circuit breaker 17 is tripped when the electrical interlocks do not prohibit its tripping.

After turning off the vacuum switch 17, the mechanical pointer 5 on the mimic 3 indicates its open position. The opening of the shutter of the window 7 for access to the drive of the disconnectors 16, 19 is unlocked.

Manual, i.e. without accessories, turning on the vacuum switch 17 is not applicable.

Manual (mechanical) shutdown of the vacuum circuit breaker 17 is performed by pressing the button 6 of the manual shutdown. The shutdown of the switch 17 is unconditional.

After turning off the vacuum switch 17, the mechanical pointer 5 on the mimic 3 indicates its open position.

The opening of the shutter of the window 7 for access of the control key to the drive of the disconnectors 16, 19 is unlocked.

The bus disconnector 16 and the linear disconnector 19 are turned on by turning the control key clockwise. The inclusion of disconnectors 16, 19 is possible when the opening of the shutter of the window 7 for access to the drive of the disconnectors 16, 19 is not blocked, which is equivalent to the fact that the vacuum switch 17 and the linear ground electrode 20 are in the off position.

After the disconnectors 16, 19 are turned on, the mechanical indicators 4, 8 on the mimic diagram 3 indicate their closed position. The opening of the curtain of the window of access to the drive of the linear ground electrode 13 is blocked.

The bus disconnector 16 and the line disconnector 19 are disconnected by turning the control key counterclockwise. Disconnecting the disconnectors 16, 19 is possible when the opening of the shutter of the window 7 for access to the drive of the disconnectors 16, 19 is not blocked, which is equivalent to the fact that the vacuum switch 17 is in the off position.

After disconnecting the disconnectors 16, 19, the mechanical indicators 4, 8 on the mimic diagram 3 indicate their open position. The opening of the curtain of the window 13 of access to the drive of the linear ground electrode 20 is unlocked.

The linear earthing switch 20 is turned on by turning the control key clockwise. The inclusion of the linear ground electrode 20 is possible when the curtain of the window 13 for accessing the drive of the linear ground electrode 20 is not blocked, which is equivalent to the fact that the disconnectors 16, 19 are in the off position and the electromagnetic lock 11 is open.

After the ground electrode 20 is turned on, the mechanical pointer 14 on the mimic diagram 3 indicates its closed position. The opening of the shutter of the window 7 for access to the drive of the disconnectors 16, 19 is blocked.

Disabling the linear ground electrode 20 is performed by turning the control key counterclockwise. The disconnection of the linear ground electrode 20 is possible when the electromagnetic lock 11 is open.

After disconnecting the linear ground electrode 20, the mechanical pointer 14 on the mimic 3 indicates its open position. The opening of the shutter of the window 7 for access to the drive of the disconnectors 16, 19 is unlocked.

This CSR can be used as part of switchgear with a voltage of 6-10 kV for new construction, expansion, reconstruction and technical re-equipment of the following objects:

- distribution and transformer substations of urban electrical networks;

- distribution and transformer substations of civil facilities and infrastructure;

distribution substations of light industry enterprises;

- traction substations of urban electric transport and subway;

- step-down substations 35-110 / 6-10 kV and 6-10 / 0.4 kV distribution networks, complete transformer substations of a high degree of factory readiness.

The proposed design allows to reduce the overall dimensions of the chambers in all three dimensions (width along the facade - 650 mm, depth at the base - 800 mm, height - 2100 mm). At the same time, the ease of use and maintainability of CSR are significantly increased. The location of the disconnectors in the immediate vicinity of the circuit breaker can significantly simplify the kinematic circuit of the drives, thereby increasing the reliability of the CSR.

The adopted principle of CSR construction provides a more efficient CSR layout, allocation of the connection compartment with

an increase in its useful volume and an increase in the convenience of installing cable lines, obtaining unimpeded access to elements requiring inspection, inspection and periodic maintenance.

In addition, the functionality of the CSR is significantly increased, which allows now to implement in a unified design of the existing cabinet a complete set of necessary connections of a classic switchgear, while qualitatively improving their inherent properties.

Claims (18)

1. One-way service prefabricated chamber, comprising busbars compartment, isolated from each other, busbar compartment, high-voltage compartment with vacuum circuit breaker, bus and line disconnectors, mechanical position indicators of the vacuum circuit breaker, bus and line disconnectors, current transformers and voltage transformers, compartment connections with a linear earthing switch, a mechanical indicator of the position of the linear earthing switch, a zero-sequence current transformer and a transformer auxiliary needs, a relay compartment with control, protection, signaling, measurement and metering devices, while the high-voltage compartment and the connection compartment are equipped with interlocking elements, characterized in that the high-voltage and relay compartments are made on a single metal structure - a retractable monoblock capable of occupying a working position, in which the main circuits are closed, the monoblock is located and fixed in the chamber, the control position at which the main circuits are open, the monoblock is located and fixed in the chamber, and The mounting position is in which the main circuits are open, the candy bar is pulled out of the chamber and locked, and access to the busbar and connection compartments is closed with protective insulating covers, the bus and linear disconnectors are designed to synchronously control a key acting on a single drive with a reducer, windows for bus drives and linear disconnectors and linear earthing are equipped with shutters that allow and prohibit access of the control key to the drives in accordance with the logic for constructing cabinet locks, when In this position, prohibiting access, the curtains can be locked with a padlock. 2. The chamber according to claim 1, characterized in that the casing is a prefabricated metal structure made of galvanized steel, the supporting frame connections are made of reinforced steel blind rivets, while the front side of the casing is painted with powder paint. 3. The camera according to claim 1, characterized in that on the front side of the housing there are controls for switching devices, a mimic diagram with mechanical indicators for the position of the vacuum circuit breaker, bus and line disconnectors and a linear ground electrode, as well as control, signaling, measurement and metering devices, mechanical pointers are rigidly connected to the drives of the corresponding switching devices. 4. The chamber according to claim 1, characterized in that the busbar compartment is covered by a front protective screen, side protective screens are installed on the outermost in the row of compartment busbar chambers, the area of the busbar compartment is illuminated by a 36 V LED. 5. The camera according to claim 1, characterized in that on the front protective screen of the busbar compartment there is a viewing window that allows you to control the position of the bus disconnector, on the door of the connection compartment there are viewing windows that allow you to control the position of the linear disconnector and the linear ground electrode. 6. The chamber according to claim 1, characterized in that emergency unloading holes are made on the rear side of the housing for organizing the directed discharge of the products of arc burning into the unattended zone when a short circuit occurs inside the cabinet. 7. The chamber according to claim 1, characterized in that for moving the monoblock into the repair position, the movable contacts of the bus and line disconnectors are made with the possibility of moving strictly in the vertical plane and folding inside the sliding part of the monoblock. 8. The chamber according to claim 1, characterized in that the monoblock is arranged to accommodate a non-linear surge suppressor in it parallel to the contacts of the vacuum circuit breaker. 9. The camera according to claim 1, characterized in that in the connection compartment low voltage circuits for phasing of high-voltage cables are highlighted, the linear earthing switch is equipped with a quick-acting spring drive and is configured to turn on a full short circuit current, the connection compartment area is illuminated with a 36 V LED lamp . 10. The camera according to claim 1, characterized in that in the bay of the connections there are nonlinear surge arresters connected according to the phase-to-ground scheme, 11. The camera according to claim 1, characterized in that in the connection compartment are installed indicators of the presence of high voltage with terminals for checking the phase rotation, capacitive voltage indicators, built into the reference insulators. 12. The chamber according to claim 1, characterized in that for connecting the voltage transformer or auxiliary transformer prior to the input of the switchgear from the connection compartment, a side busbar transition is made to the left or right. 13. The camera according to claim 1, characterized in that the relay compartment is a cabinet with auxiliary circuit equipment mounted on the front side of the monoblock. 14. The chamber according to claim 1, characterized in that the relay compartment is made local heating for relay devices, the minimum operating temperature of which is above minus 40 ° C. 15. The chamber according to claim 1, characterized in that the locking elements are mechanical with the ability to prohibit the circuit breaker from being turned on when the knives of the linear and bus disconnectors are in the intermediate position, to prohibit operating the linear and bus disconnectors when the circuit breaker is turned on, to prohibit the line earthing the linear and bus disconnectors switched on, the ban on the inclusion of the linear and bus disconnectors when the linear earthing switch is on, the ban on the movement of the monoblock when the switch is off switch in the on state, prohibition of opening the door of the cable compartment of the camera with the open position of the linear earthing switch. 16. The chamber according to claim 1, characterized in that when it is used as part of a switchgear, the interlock elements are made electric with the possibility of prohibiting the inclusion of input when earthing the busbars of the corresponding section, prohibiting the inclusion of a section switch, including when automatically turning on the reserve, when grounding busbars of any section, a ban on the inclusion of an earthing switch of busbars with the input and section switches turned on. 17. The camera according to claim 1, characterized in that all metal elements available for touching during operation, which may be energized, are grounded. 18. The chamber according to claim 1, characterized in that the laying of the main busbars of the operational circuits is carried out in a box located in the upper part of the chamber and isolated from the busbar compartment, while terminal boxes of the main busbars are additionally placed in the box.