National sales ZW20-12F/630-20 watchdog vacuum circuit breaker special offer ZW20-12F/630 outdoor intelligent demarcation vacuum circuit breaker with insulated combination circuit breaker, rated voltage 12KV, three-phase AC 50HZ high voltage outdoor switchgear, built-in voltage The 12KV is converted into a 220V operating voltage and is mainly used to break the load current, overload current, and short-circuit current of rural power grids, urban grids, and small power systems. The overall structure of the product is a three-phase common box type. The three-phase vacuum arc extinguishing chamber is placed in a metal box. The SMC insulation material is used for phase insulation and ground insulation. The performance is reliable and the insulation strength is high. This product can also be equipped with a reclosing controller for use in applications where easy power is available. PT type and reclosing controllers are used in applications where there is no power supply. Smart circuit breakers are suitable for radial power supply and ring power supply systems to help the system eliminate transient faults. , Automatic restoration of power supply, can also isolate permanent faults, and realize distribution automation. Intelligent circuit breaker has 1~3 times reclosing function, and recloser parameters can be set;
The intelligent circuit breaker has the functions of three-phase composite protection such as closing inrush current control, over-current protection and short-circuit breaking, and the parameters can be continuously set;
Intelligent circuit breaker has a small current grounding protection function, and the parameters can be continuously set;
Intelligent circuit breakers can achieve wired remote control and wireless remote control under the bar. Three-phase power system for AC 50Hz, voltage 10 ~ 12kV, as breaking, closing the load current use, it has overload and short circuit protection, quick-break protection, definite time delay protection, automatic reclosing function, also According to the needs of users, it can be equipped with lightning arresters or isolating switches (that is, the combination of circuit breakers and isolating switches, hereinafter referred to as “combination intelligent circuit breakersâ€), etc. This intelligent circuit breaker has its own power supply and can be operated remotely and is equipped with CT and PT. Interface to meet telemetry requirements.
Quality is created, not detected
Today's quality is tomorrow's market
Say goodbye to traditional traditions yesterday and move forward towards a normative future
Quality is not the best, only better
I. Overview
When a 10KV overhead distribution line T-branch line or end-user internal fault occurs, the time limit of the protection action of the line-input switch and the protection time limit of the substation outlet switch cannot be properly set, which will cause the tripping of the substation outlet switch. If the nature of the fault is permanent and the substation recombination will not be successful, a partial accident within the medium-voltage user community will cause the entire 10KV distribution line to lose power.
If a user demarcation switch (commonly known as the watchdog) is installed at the T-connection or at the customer end (responsibility demarcation point), the failure will be automatically determined after confirming that a fault (overcurrent, short-circuit, and single-phase earth fault) has occurred in the user domain. Isolation ensures normal power usage for users in non-faulty areas. ZW20-12F outdoor user boundary vacuum circuit breaker is a kind of user demarcation switch independently developed by our company. It is mainly composed of ZW20-12 outdoor pole vacuum circuit breaker body and FDR-02 fault detection controller and external voltage transformer. The three are electrically connected through the air socket and outdoor sealed control cable. With fault detection, protection and control functions and communication functions, it can reliably determine and detect milliamperes of zero-sequence current and phase-to-phase short-circuit fault currents in and out of the boundary, and automatically eliminate single-phase ground faults and phase-to-phase short-circuit faults.
ZW20-12F outdoor column vacuum circuit breaker is an outdoor power distribution equipment with rated voltage of 12KV and three-phase AC 50Hz. It adopts vacuum arc extinguishing and SF6 gas as insulating medium. The box adopts the gas sealing, explosion-proof and insulating structure technology introduced by Toshiba Corporation VSP5. The inlet and outlet bushings also have improved sealing performance, and the overall sealing performance is excellent. The SF6 gas does not leak and is not affected by the external environment; its spring operating mechanism has been miniaturized design, reliability, stability optimization, the use of direct-acting chain main drive and multi-stage trip system, action reliability and stability than domestic The traditional spring operating mechanism is improved several times; the contact between the shaft and the sleeve of the main circuit adopts an externally-advanced outward-styled bracelet structure, and the main circuit has a small contact resistance and a low temperature rise.
ZW20-12F type outdoor high-voltage vacuum circuit breaker is a kind of maintenance-free product, which is a fine product in the outdoor high-voltage vacuum circuit breaker. It is the new product of the company's comprehensive domestic and foreign column switches. .
This product mainly meets the following national standards:
Switch section: GB1984
"High Voltage AC Circuit Breaker" GB/T11022-1999
"Common technical conditions for high voltage switchgear control and equipment standards" Control terminal part: GB/T726-2000 "Basic test methods for relays and devices" GB/T17626-1998
Electromagnetic Compatibility Test and Measurement Technology Electrical Fast Transient Burst Immunity Test
Yueqing Qixuan Electric Co., Ltd. after-sales service commitment
1. Since the date of sale, the product has been repaired and replaced due to quality problems during the normal use within one year.
2. Products that have exceeded the warranty period (except for products that cannot be repaired). The Division is responsible for maintenance and charges a certain part cost.
Second, the use of environmental conditions
1, the ambient air temperature: -40 °C ~ +40 °C; day temperature difference: the daily temperature change is not more than 25 °C; According to SF6 gas substance properties, when the ambient temperature is -40 °C, such as the pressure inside the box is 0.05Mpa, this When SF6 is still gaseous, ensure that the product works properly. (When the ambient temperature is -40°C and the gauge pressure is 0.05Mpa, the SF6 liquefaction point is -55°C; at zero gauge pressure, the SF6 liquefaction point will not exceed -60°C).
2, the wind speed is not more than 35m/s;
3, no flammable, explosive danger, strong chemical corrosion (such as various acids, alkalis or smoke, etc.) and severe vibration of the place.
4, Altitude: ≯1000m;
5, Cover thickness: 10mm;
6, air pollution degree: IV level;
7, earthquake intensity: ≯ 8 degrees;
8. Grid neutral point grounding method: Neutral point ungrounded, neutral point arc-extinguishing coil grounded, neutral point low-resistance grounded.
9, the technical parameters of the opening solenoid coil, with the closing coil.
10, current transformer in the body of the circuit breaker A, C phase configuration 1 current transformer, ratio 600/1, for phase protection.
11, zero-sequence current transformer
One zero-sequence current transformer is arranged in the circuit breaker body, the ratio is 20/1, and there is a good linear relationship in the zero-sequence current 0.1~5A section, and the error ratio of the 0.1VA ratio is less than 3%. When the zero-sequence current is 400A, the secondary output current is not less than 5A.
12. When the circuit breaker is working, it needs to operate the power supply. The operating current can be external AC or DC 220V power supply, but it is generally on the 10KV line external operating power transformer or voltage transformer to obtain AC 220V operating power. 4.6.2 External Operation The power supply voltage regulator or voltage transformer type is selected by the user. It is recommended to use outdoor type products with fuses to facilitate the installation. If the external power transformer or voltage transformer is not equipped with a fuse, the user must additionally install an outdoor fuse to protect the external operating power transformer or voltage transformer.
13. Secondary fuse configuration for operating the power supply. See shipping documents for details.
Fifth, the basic structure of the circuit breaker body
5.1 circuit breaker body structure shown in Figure 1
The circuit breaker body structure is composed of a conductive loop, an insulation system, a seal and a shell. The conductive loop is formed by connecting a conductive rod, a conductive clip, a soft link and a vacuum interrupter. This product uses SF6 gas insulation. The inlet and outlet insulating sleeves are integrally cast with epoxy resin and silicone rubber. In order to reduce the volume of the switch, the A and C phases adopt a corner bushing to ensure good external insulation; the interior adopts a composite insulation structure and is not filled with SF6 gas. Can also reach the corresponding insulation level. This product uses a mature sealed structure. The cover of the mechanism and the cover of the housing are sealed by a stamping forming groove, and the output pointer shaft is sealed with double “O†rings. The inlet and outlet sleeves are integrally cast to ensure good airtightness.
5.2 Actuator The actuator of this product is an electric energy storage device, an electric motor, a manual energy storage device, a manual clutch device, an integral structure closing spring, an energy storage system, an overcurrent release device, an opening and closing coil, and a manual The closing and closing system, auxiliary opening and energy storage instructions and other components.
5.3 Hoisting and anti-explosion device The hoisting device is used for product installation, fixing, handling and lifting, and cooperates with explosion-proof devices to increase the explosion-proof performance of the product. In order to enable the inspection and inspection personnel to find under the rod whether the switch has exploded, There is a flap explosion indicator. An explosion occurred and the indicator's flap was turned into a horizontal shape by the normal sagging, and under the visible flap-type explosion-proof indicator flap, “overhaul†the word.
Yueqing Qixuan Electric Co., Ltd. specializes in producing high voltage vacuum circuit breakers, disconnectors, load switches, grounding switches, high voltage fuses, cable distribution boxes, wall bushings and other high voltage products.
Sixth, the working principle of circuit breaker body
Energy storage
The mechanism energy storage is closing spring energy storage.
1. Principle of electric energy storage: The motor applies output torque to the pinion of the mechanism and transmits it to the large sprocket on the main shaft through the chain, thereby driving the arm to rotate, and closing the spring to store energy. When the screw on the arm is pressed When the lower limit switch is turned on, the motor power is cut off and the spring energy storage is completed.
2. Manual energy storage principle: output shaft from manual energy storage transmission mechanism, through the pinion on the output shaft to transmit the rotating torque to the pinion, the fully meshed large gear (located on the main shaft and riveted with the large sprocket), As a result, the arm is rotated to allow the closing spring to store energy.
3ã€Electrical closing: After the mechanism receives the closing signal, the moving iron core of the closing electromagnet moves upwards, pushing the closing tripping bar to move upwards, causing the closing half shaft to rotate counterclockwise to release the closing bar. Constraints; At the same time, the closing forceps is pressed counterclockwise by the roller and the energy storage is released. The cam on the spindle generates an impact force due to the release of the closing spring and hits the manual energy storage shaft (ie, the output shaft). The rocker arm is driven by the connecting rod to the switch to complete the closing operation.
4. Manual operation: Pull the manual handle to close, apply external force (approx. 80~120N) to drive the pull-out on the closing half shaft and turn counterclockwise to drive the closing half shaft to rotate counterclockwise to generate and close the switch. The electromagnet operates the same effect.
The intelligent circuit breaker has the functions of three-phase composite protection such as closing inrush current control, over-current protection and short-circuit breaking, and the parameters can be continuously set;
Intelligent circuit breaker has a small current grounding protection function, and the parameters can be continuously set;
Intelligent circuit breakers can achieve wired remote control and wireless remote control under the bar. Three-phase power system for AC 50Hz, voltage 10 ~ 12kV, as breaking, closing the load current use, it has overload and short circuit protection, quick-break protection, definite time delay protection, automatic reclosing function, also According to the needs of users, it can be equipped with lightning arresters or isolating switches (that is, the combination of circuit breakers and isolating switches, hereinafter referred to as “combination intelligent circuit breakersâ€), etc. This intelligent circuit breaker has its own power supply and can be operated remotely and is equipped with CT and PT. Interface to meet telemetry requirements.
Quality is created, not detected
Today's quality is tomorrow's market
Say goodbye to traditional traditions yesterday and move forward towards a normative future
Quality is not the best, only better
I. Overview
When a 10KV overhead distribution line T-branch line or end-user internal fault occurs, the time limit of the protection action of the line-input switch and the protection time limit of the substation outlet switch cannot be properly set, which will cause the tripping of the substation outlet switch. If the nature of the fault is permanent and the substation recombination will not be successful, a partial accident within the medium-voltage user community will cause the entire 10KV distribution line to lose power.
If a user demarcation switch (commonly known as the watchdog) is installed at the T-connection or at the customer end (responsibility demarcation point), the failure will be automatically determined after confirming that a fault (overcurrent, short-circuit, and single-phase earth fault) has occurred in the user domain. Isolation ensures normal power usage for users in non-faulty areas. ZW20-12F outdoor user boundary vacuum circuit breaker is a kind of user demarcation switch independently developed by our company. It is mainly composed of ZW20-12 outdoor pole vacuum circuit breaker body and FDR-02 fault detection controller and external voltage transformer. The three are electrically connected through the air socket and outdoor sealed control cable. With fault detection, protection and control functions and communication functions, it can reliably determine and detect milliamperes of zero-sequence current and phase-to-phase short-circuit fault currents in and out of the boundary, and automatically eliminate single-phase ground faults and phase-to-phase short-circuit faults.
ZW20-12F outdoor column vacuum circuit breaker is an outdoor power distribution equipment with rated voltage of 12KV and three-phase AC 50Hz. It adopts vacuum arc extinguishing and SF6 gas as insulating medium. The box adopts the gas sealing, explosion-proof and insulating structure technology introduced by Toshiba Corporation VSP5. The inlet and outlet bushings also have improved sealing performance, and the overall sealing performance is excellent. The SF6 gas does not leak and is not affected by the external environment; its spring operating mechanism has been miniaturized design, reliability, stability optimization, the use of direct-acting chain main drive and multi-stage trip system, action reliability and stability than domestic The traditional spring operating mechanism is improved several times; the contact between the shaft and the sleeve of the main circuit adopts an externally-advanced outward-styled bracelet structure, and the main circuit has a small contact resistance and a low temperature rise.
ZW20-12F type outdoor high-voltage vacuum circuit breaker is a kind of maintenance-free product, which is a fine product in the outdoor high-voltage vacuum circuit breaker. It is the new product of the company's comprehensive domestic and foreign column switches. .
This product mainly meets the following national standards:
Switch section: GB1984
"High Voltage AC Circuit Breaker" GB/T11022-1999
"Common technical conditions for high voltage switchgear control and equipment standards" Control terminal part: GB/T726-2000 "Basic test methods for relays and devices" GB/T17626-1998
Electromagnetic Compatibility Test and Measurement Technology Electrical Fast Transient Burst Immunity Test
Yueqing Qixuan Electric Co., Ltd. after-sales service commitment
1. Since the date of sale, the product has been repaired and replaced due to quality problems during the normal use within one year.
2. Products that have exceeded the warranty period (except for products that cannot be repaired). The Division is responsible for maintenance and charges a certain part cost.
Second, the use of environmental conditions
1, the ambient air temperature: -40 °C ~ +40 °C; day temperature difference: the daily temperature change is not more than 25 °C; According to SF6 gas substance properties, when the ambient temperature is -40 °C, such as the pressure inside the box is 0.05Mpa, this When SF6 is still gaseous, ensure that the product works properly. (When the ambient temperature is -40°C and the gauge pressure is 0.05Mpa, the SF6 liquefaction point is -55°C; at zero gauge pressure, the SF6 liquefaction point will not exceed -60°C).
2, the wind speed is not more than 35m/s;
3, no flammable, explosive danger, strong chemical corrosion (such as various acids, alkalis or smoke, etc.) and severe vibration of the place.
4, Altitude: ≯1000m;
5, Cover thickness: 10mm;
6, air pollution degree: IV level;
7, earthquake intensity: ≯ 8 degrees;
8. Grid neutral point grounding method: Neutral point ungrounded, neutral point arc-extinguishing coil grounded, neutral point low-resistance grounded.
9, the technical parameters of the opening solenoid coil, with the closing coil.
10, current transformer in the body of the circuit breaker A, C phase configuration 1 current transformer, ratio 600/1, for phase protection.
11, zero-sequence current transformer
One zero-sequence current transformer is arranged in the circuit breaker body, the ratio is 20/1, and there is a good linear relationship in the zero-sequence current 0.1~5A section, and the error ratio of the 0.1VA ratio is less than 3%. When the zero-sequence current is 400A, the secondary output current is not less than 5A.
12. When the circuit breaker is working, it needs to operate the power supply. The operating current can be external AC or DC 220V power supply, but it is generally on the 10KV line external operating power transformer or voltage transformer to obtain AC 220V operating power. 4.6.2 External Operation The power supply voltage regulator or voltage transformer type is selected by the user. It is recommended to use outdoor type products with fuses to facilitate the installation. If the external power transformer or voltage transformer is not equipped with a fuse, the user must additionally install an outdoor fuse to protect the external operating power transformer or voltage transformer.
13. Secondary fuse configuration for operating the power supply. See shipping documents for details.
Fifth, the basic structure of the circuit breaker body
5.1 circuit breaker body structure shown in Figure 1
The circuit breaker body structure is composed of a conductive loop, an insulation system, a seal and a shell. The conductive loop is formed by connecting a conductive rod, a conductive clip, a soft link and a vacuum interrupter. This product uses SF6 gas insulation. The inlet and outlet insulating sleeves are integrally cast with epoxy resin and silicone rubber. In order to reduce the volume of the switch, the A and C phases adopt a corner bushing to ensure good external insulation; the interior adopts a composite insulation structure and is not filled with SF6 gas. Can also reach the corresponding insulation level. This product uses a mature sealed structure. The cover of the mechanism and the cover of the housing are sealed by a stamping forming groove, and the output pointer shaft is sealed with double “O†rings. The inlet and outlet sleeves are integrally cast to ensure good airtightness.
5.2 Actuator The actuator of this product is an electric energy storage device, an electric motor, a manual energy storage device, a manual clutch device, an integral structure closing spring, an energy storage system, an overcurrent release device, an opening and closing coil, and a manual The closing and closing system, auxiliary opening and energy storage instructions and other components.
5.3 Hoisting and anti-explosion device The hoisting device is used for product installation, fixing, handling and lifting, and cooperates with explosion-proof devices to increase the explosion-proof performance of the product. In order to enable the inspection and inspection personnel to find under the rod whether the switch has exploded, There is a flap explosion indicator. An explosion occurred and the indicator's flap was turned into a horizontal shape by the normal sagging, and under the visible flap-type explosion-proof indicator flap, “overhaul†the word.
Yueqing Qixuan Electric Co., Ltd. specializes in producing high voltage vacuum circuit breakers, disconnectors, load switches, grounding switches, high voltage fuses, cable distribution boxes, wall bushings and other high voltage products.
Sixth, the working principle of circuit breaker body
Energy storage
The mechanism energy storage is closing spring energy storage.
1. Principle of electric energy storage: The motor applies output torque to the pinion of the mechanism and transmits it to the large sprocket on the main shaft through the chain, thereby driving the arm to rotate, and closing the spring to store energy. When the screw on the arm is pressed When the lower limit switch is turned on, the motor power is cut off and the spring energy storage is completed.
2. Manual energy storage principle: output shaft from manual energy storage transmission mechanism, through the pinion on the output shaft to transmit the rotating torque to the pinion, the fully meshed large gear (located on the main shaft and riveted with the large sprocket), As a result, the arm is rotated to allow the closing spring to store energy.
3ã€Electrical closing: After the mechanism receives the closing signal, the moving iron core of the closing electromagnet moves upwards, pushing the closing tripping bar to move upwards, causing the closing half shaft to rotate counterclockwise to release the closing bar. Constraints; At the same time, the closing forceps is pressed counterclockwise by the roller and the energy storage is released. The cam on the spindle generates an impact force due to the release of the closing spring and hits the manual energy storage shaft (ie, the output shaft). The rocker arm is driven by the connecting rod to the switch to complete the closing operation.
4. Manual operation: Pull the manual handle to close, apply external force (approx. 80~120N) to drive the pull-out on the closing half shaft and turn counterclockwise to drive the closing half shaft to rotate counterclockwise to generate and close the switch. The electromagnet operates the same effect.
Waveguide Adaptor,Coaxial To Waveguide Adapter,Waveguide To Coaxial Adapter,Waveguide To Coaxial Transition
Chengdu Zysen Technology Co., Ltd. , https://www.zysenmw.com