CN202586103U - Intelligent low-voltage capacitor box - Google Patents

Abstract

An intelligent low-voltage capacitor cabinet, including cabinet shell, A, B, C phase voltage buses, knife fuse switch QC, current transformers TA1, TA2 and TA3, ammeters PA1, PA2 and PA3, lightning arresters FA1, FA2 and FA3 and wireless The power compensation controller HK is characterized in that it also includes several common compensation intelligent low-voltage power capacitors 1C, several separate compensation intelligent low-voltage power capacitors 2C, several indicator lamps HR1, several indicator lamps HR2 and capacitor miniature For the core-through current transformer TA'2, all the electrical components mentioned above are installed in the cabinet shell. Its advantages are: simple structure, small size, light weight, simple production, low cost, good performance, easy maintenance, and can realize intelligent non-contact function, avoiding the phenomenon of burning the main contact of the contactor when switching capacitors occur.

Description

Intelligent low voltage capacitor cabinet

technical field

The utility model relates to a low-voltage capacitor cabinet, in particular to an intelligent low-voltage capacitor cabinet, which is suitable for reactive power compensation equipment and devices, and can be used in conventional power distribution rooms, power distribution box stations, low-voltage power distribution boards, etc. Electrical equipment and fields of power compensation equipment and devices.

Background technique

At present, the existing low-voltage capacitor cabinets are mainly composed of cabinet shells, busbars, circuit breakers, isolating switches, thermal relays, contactors, lightning arresters, capacitors, reactors, primary and secondary wires, terminal blocks, reactive power compensation controllers and panels. Instrument composition. This kind of low-voltage capacitor cabinet has defects such as cumbersome production process, heavy workload, many nodes, and many hidden fault points. When reactive power compensation is performed, a special contactor for capacitor switching is usually selected for capacitor switching. However, this kind of capacitor switching The method is more suitable for an ideal environment where the load is basically stable and the three-phase voltage is basically balanced. When the current is large, the current-limiting impedance of the special contactor for capacitor switching and the phenomenon that the main contact is burned out occasionally occur. The above are the deficiencies in the prior art.

Utility model content

The purpose of this utility model is: to overcome the deficiencies of the prior art, to design an intelligent low-voltage capacitor cabinet with simple structure, simple production, good performance and easy maintenance. The intelligent low-voltage capacitor cabinet can realize the intelligent non-contact function and avoid The phenomenon of burning out of the main contacts of the contactor during capacitor switching is prevented.

The purpose of this utility model can be achieved through the following technical solutions:

This intelligent low-voltage capacitor cabinet includes cabinet shell, A, B, and C phase voltage buses, knife fuse switch QC, current transformers TA1, TA2, and TA3, ammeters PA1, PA2, and PA3, and lightning arresters FA1, FA2, and FA3. Yes: It also includes several co-complementing intelligent low-voltage power capacitors 1C, several sub-complementing intelligent low-voltage power capacitors 2C, several indicator lights HR1, several indicator lights HR2, and capacitor miniature core-through current transformers TA'1 , TA'2 and TA'3, and the total number of indicators HR1 is twice the total number of common compensation intelligent low-voltage power capacitors 1C, and the total number of indicators HR2 is the total number of separate compensation intelligent low-voltage power capacitors 2C 3 times of the above-mentioned electrical components are installed in the cabinet shell;

The circuit connection relationship of each electrical component is as follows: A, B, and C phase voltage busbars are connected to the knife fuse switch QC, pass through the primary side coils of current transformers TA1, TA2, and TA3 respectively, and the secondary side coils of current transformers TA1, TA2, and TA3 The output terminals of the secondary side are respectively connected to the ammeters PA1, PA2 and PA3, the current output terminals of the ammeters PA1, PA2 and PA3 are all grounded, and the terminals of the lightning arresters FA1, FA2 and FA3 are respectively connected to the A, B and C phase voltage buses, and the lightning arresters FA1, The other ends of FA2 and FA3 are both grounded, and the 1st to 3rd pins of several co-compensation intelligent low-voltage power capacitors 1C are respectively connected to the A, B, and C-phase voltage buses, and several sub-compensation intelligent low-voltage power capacitors The 0th to 3rd pins of the capacitor 2C are respectively connected to the zero-sequence voltage busbar of the incoming switch cabinet and the A, B, and C phase voltage busbars, and the 4th pins of several co-compensation intelligent low-voltage power capacitors 1C are mutually After connection, connect to the 4th pin of the first sub-complementary intelligent low-voltage power capacitor 2C, and connect the fifth pins of several co-complementary intelligent low-voltage power capacitors 1C to each other, then connect to the first sub-component The fifth pin of the supplementary intelligent low-voltage power capacitor 2C, and the sixth pins of several complementary intelligent low-voltage power capacitors 1C are connected to each other, and then connected to the pin of the first sub-complementary intelligent low-voltage power capacitor 2C The 7th pin, after the 7th pins of several co-complementing intelligent low-voltage power capacitors 1C are connected to each other, they are connected to the 9th pin of the first sub-complementing intelligent low-voltage power capacitor 2C, and several sub-complementing The 4th to 9th pins of the intelligent low-voltage power capacitor 2C are connected to each other, and the 11th and 12th pins of each co-complementary intelligent low-voltage power capacitor 1C are respectively connected to one end of two indicators HR1. The other end of HR1 indicator lamp is short-circuited and then connected to the B-phase voltage bus. The 10th, 11th and 12th pins of each sub-compensation intelligent low-voltage power capacitor 2C are respectively connected to one end of three indicator lamps HR2. The other end of the lamp HR2 is short-circuited and then connected to the zero-sequence voltage busbar of the incoming switch cabinet. One end of the secondary side output ends of current transformers TA7, TA8 and TA9, and one end of the secondary side output ends of capacitor miniature core-through current transformers TA'1, TA'2 and TA'3 are respectively connected to the last sub-complement The 6th, 7th and 8th pins of the type intelligent low-voltage power capacitor 2C, the other end of the secondary side output terminals of the capacitor miniature core-through current transformers TA'1, TA'2 and TA'3 are short-circuited and connected to the last The 9th pin of the sub-compensation intelligent low-voltage power capacitor 2C.

There are 4 co-complementing intelligent low-voltage power capacitors 1C, 2 sub-complementing intelligent low-voltage power capacitors 2C, 8 indicator lights HR1 and 6 indicator lights HR2.

The technical scheme of the present utility model can also be:

This intelligent low-voltage capacitor cabinet includes cabinet shell, A, B, C phase voltage buses, knife fuse switch QC, current transformers TA1, TA2 and TA3, ammeters PA1, PA2 and PA3, arresters FA1, FA2 and FA3 and reactive power Compensation controller HK is characterized in that it also includes several co-complementing intelligent low-voltage power capacitors 1C, several sub-complementing intelligent low-voltage power capacitors 2C, several indicator lamps HR1, several indicator lamps HR2 and capacitor miniature wear The core current transformer TA'2, and the total number of indicators HR1 is twice the total number of common compensation intelligent low-voltage power capacitors 1C, and the total number of indicators HR2 is the total number of separate compensation intelligent low-voltage power capacitors 2C 3 times, the above-mentioned electrical components are installed in the cabinet shell;

The circuit connection relationship of each electrical component is as follows: A, B, and C phase voltage busbars are connected to the knife fuse switch QC, pass through the primary side coils of current transformers TA1, TA2, and TA3 respectively, and the secondary side coils of current transformers TA1, TA2, and TA3 The output terminals of the secondary side are respectively connected to the ammeters PA1, PA2 and PA3, the current output terminals of the ammeters PA1, PA2 and PA3 are all grounded, and the terminals of the lightning arresters FA1, FA2 and FA3 are respectively connected to the A, B and C phase voltage buses, and the lightning arresters FA1, The other ends of FA2 and FA3 are both grounded, and the 1st to 3rd pins of several co-compensation intelligent low-voltage power capacitors 1C are respectively connected to the A, B, and C-phase voltage buses, and several sub-compensation intelligent low-voltage power capacitors The 0th to 3rd pins of the capacitor 2C are respectively connected to the zero-sequence voltage busbar of the incoming switch cabinet and the A, B, and C phase voltage busbars, and the 4th pins of several co-compensation intelligent low-voltage power capacitors 1C are mutually After connection, connect to the 4th pin of the first sub-complementary intelligent low-voltage power capacitor 2C, and connect the fifth pins of several co-complementary intelligent low-voltage power capacitors 1C to each other, then connect to the first sub-component The fifth pin of the supplementary intelligent low-voltage power capacitor 2C, and the sixth pins of several complementary intelligent low-voltage power capacitors 1C are connected to each other, and then connected to the pin of the first sub-complementary intelligent low-voltage power capacitor 2C The 7th pin, after the 7th pins of several co-complementing intelligent low-voltage power capacitors 1C are connected to each other, they are connected to the 9th pin of the first sub-complementing intelligent low-voltage power capacitor 2C, and several sub-complementing The 4th to 9th pins of the intelligent low-voltage power capacitor 2C are connected to each other, and the 11th and 12th pins of each co-complementary intelligent low-voltage power capacitor 1C are respectively connected to one end of two indicators HR1. The other end of HR1 indicator lamp is short-circuited and then connected to the B-phase voltage bus. The 10th, 11th and 12th pins of each sub-compensation intelligent low-voltage power capacitor 2C are respectively connected to one end of three indicator lamps HR2. The other end of the lamp HR2 is short-circuited and then connected to the zero-sequence voltage busbar of the incoming switchgear, and the UA, UB, UC and UN terminals of the reactive power compensation controller HK are respectively connected to the A, B, C phase voltage busbars and the incoming switchgear On the zero-sequence voltage bus, the A and B terminals of the reactive power compensation controller HK are respectively connected to the 4th and 5th pins of the first co-compensation intelligent low-voltage power capacitor 1C, and the capacitor miniature core-through current transformer TA'2 The primary side coil of the capacitor is passed through one end of the secondary side output end of the current transformer TA8 in the incoming line switch cabinet, and the two ends of the secondary side output end of the capacitor miniature core-through current transformer TA'2 are respectively connected to the reactive power compensation control The 6th and 7th pins of the device HK.

There are 4 co-complementing intelligent low-voltage power capacitors 1C, 2 sub-complementing intelligent low-voltage power capacitors 2C, 8 indicator lights HR1 and 6 indicator lights HR2.

The advantages of the utility model are: 1) In terms of structural mode, it is composed of a number of intelligent low-voltage power capacitors or a number of intelligent low-voltage power capacitors plus a controller assembled in the cabinet, changing the original low-voltage capacitor The structural model of the cabinet eliminates components such as circuit breakers, contactors, and thermal relays, saving 70% of wires, 80% of nodes, and 60% of production hours. Each capacitor cabinet saves 500 yuan in component costs and 800 yuan in man-hours It has the advantages of simple structure, small size, light weight, simple production, low cost, good performance, and easy maintenance, and can realize intelligent non-contact function, avoiding the burning phenomenon of the main contact of the contactor when switching capacitors 2) Functional intelligence, in addition to conventional functions, it also has functions such as zero switching, over-temperature protection in the capacitor body, current protection of each phase of the capacitor, and fault self-diagnosis, online and other functions; thus, it can reduce the impact of switching The impact of the power grid improves the rapidity of control and prolongs the service life of the capacitor; 3) The reactive power compensation controller is optional, and the intelligent low-voltage power capacitor can work as a self-contained system to realize the low-voltage reactive power automatic compensation function. The type low-voltage power capacitor can automatically quit working after failure, and does not affect the work of other capacitors. The equipment has good reliability and low power consumption, which can reduce device energy consumption, wire energy consumption and contact energy consumption by more than 70%. Capacitor cabinet Low internal temperature rise; 4) The capacitor cabinet is a building block device, which is convenient for expansion and capacity configuration adjustment, so it can realize the optimal configuration of reactive power compensation.

Description of drawings

Fig. 1 is the circuit schematic diagram of first kind of embodiment;

Fig. 2 is a schematic circuit diagram of the second embodiment.

Detailed ways

The first embodiment, as shown in Figure 1, the intelligent low-voltage capacitor cabinet, including the cabinet shell, A, B, C phase voltage bus, knife fuse switch QC, current transformers TA1, TA2 and TA3, ammeters PA1, PA2 And PA3 and lightning arresters FA1, FA2 and FA3, which are characterized in that it also includes several pieces of co-complementing intelligent low-voltage power capacitors 1C 1, several pieces of sub-complementing intelligent low-voltage power capacitors 2C 2, several pieces of indicator lights HR1 3, several indicator lamps HR2 4 and capacitor miniature core-through current transformers TA'1, TA'2 and TA'3, and the total number of indicators HR1 3 is twice the total number of co-compensation intelligent low-voltage power capacitors 1C 1, The total number of indicators HR2 4 is three times the total number of sub-complementary intelligent low-voltage power capacitors 2C 2 , and all the electrical components mentioned above are installed in the cabinet shell;

The circuit connection relationship of each electrical component is as follows: A, B, and C phase voltage busbars are connected to the knife fuse switch QC, pass through the primary side coils of current transformers TA1, TA2, and TA3 respectively, and the secondary side coils of current transformers TA1, TA2, and TA3 The output terminals of the secondary side are respectively connected to the ammeters PA1, PA2 and PA3, the current output terminals of the ammeters PA1, PA2 and PA3 are all grounded, and the terminals of the lightning arresters FA1, FA2 and FA3 are respectively connected to the A, B and C phase voltage buses, and the lightning arresters FA1, The other ends of FA2 and FA3 are both grounded, and the 1st to 3rd pins of several co-compensation intelligent low-voltage power capacitors 1C1 are respectively connected to the A, B, and C phase voltage buses, and several sub-compensation intelligent low-voltage power capacitors The 0th to 3rd pins of the power capacitor 2C 2 are respectively connected to the zero-sequence voltage bus of the incoming switch cabinet and the A, B, and C phase voltage bus, and the fourth pins of several co-complementing intelligent low-voltage power capacitors 1C 1 After the pins are connected to each other, connect to the 4th pin of the first sub-complementary intelligent low-voltage power capacitor 2C 2, and after the fifth pins of several co-complementary intelligent low-voltage power capacitors 1C 1 are connected to each other, connect To the fifth pin of the first sub-complementary intelligent low-voltage power capacitor 2C 2, after the sixth pins of several co-complementary intelligent low-voltage power capacitors 1C 1 are connected to each other, connect to the first sub-compensation type The 7th pin of the intelligent low-voltage power capacitor 2C 2, the 7th pins of several co-complementary intelligent low-voltage power capacitors 1C 1 are connected to each other, and then connected to the first sub-complementary intelligent low-voltage power capacitor 2C 2 The 9th pin of the 9th pin, the 4th to 9th pins of several sub-complementary intelligent low-voltage power capacitors 2C 2 are connected to each other, and the 11th and 12th pins of each co-complementary intelligent low-voltage power capacitor 1C 1 The pins are respectively connected to one end of two indicators HR1 3, and the other ends of several indicators HR1 3 are short-circuited and then connected to the B-phase voltage bus. The pins are respectively connected to one end of the three indicator lights HR2 4, and the other ends of several indicator lights HR2 4 are short-circuited and then connected to the zero-sequence voltage bus of the incoming switch cabinet, capacitor miniature core-through current transformers TA'1, TA'2 The primary side coils of TA'3 and TA'3 are respectively threaded on one end of the secondary side output ends of the current transformers TA7, TA8 and TA9 in the incoming switch cabinet, and the capacitor miniature core-through current transformers TA'1, TA'2 and TA One end of the output terminal of the secondary side of '3 is respectively connected to the 6th, 7th and 8th pins of the last sub-compensation type intelligent low-voltage power capacitor 2C 2, and the capacitor miniature core-through current transformers TA'1, TA'2 and The other end of the secondary side output end of TA'3 is short-circuited and then connected to the ninth pin of the last sub-compensation intelligent low-voltage power capacitor 2C2.

There are 4 pieces of co-compensation intelligent low-voltage power capacitors 1C1, 2 pieces of sub-compensation intelligent low-voltage power capacitors 2C2, 8 indicator lights HR13, and 6 indicator lights HR24.

The second embodiment, as shown in Figure 2, the intelligent low-voltage capacitor cabinet, including the cabinet shell, A, B, C phase voltage bus, knife fuse switch QC, current transformers TA1, TA2 and TA3, ammeters PA1, PA2 and PA3, lightning arresters FA1, FA2 and FA3, and reactive power compensation controller HK, which are characterized in that: it also includes several pieces of co-complementing intelligent low-voltage power capacitors 1C 1, several pieces of sub-complementing intelligent low-voltage power capacitors 2C 2, and several indicator lamp HR1 3, several indicator lamps HR2 4 and capacitor core-through current transformer TA'2, and the total number of indicators HR1 3 is twice the total number of co-compensation intelligent low-voltage power capacitors 1C 1, indicating The total number of pieces of lamp HR2 4 is 3 times of the total number of pieces of sub-complementary intelligent low-voltage power capacitor 2C 2, and all the electrical components mentioned above are installed in the cabinet shell;

The circuit connection relationship of each electrical component is as follows: A, B, and C phase voltage busbars are connected to the knife fuse switch QC, pass through the primary side coils of current transformers TA1, TA2, and TA3 respectively, and the secondary side coils of current transformers TA1, TA2, and TA3 The output terminals of the secondary side are respectively connected to the ammeters PA1, PA2 and PA3, the current output terminals of the ammeters PA1, PA2 and PA3 are all grounded, and the terminals of the lightning arresters FA1, FA2 and FA3 are respectively connected to the A, B and C phase voltage buses, and the lightning arresters FA1, The other ends of FA2 and FA3 are both grounded, and the 1st to 3rd pins of several co-compensation intelligent low-voltage power capacitors 1C1 are respectively connected to the A, B, and C phase voltage buses, and several sub-compensation intelligent low-voltage power capacitors The 0th to 3rd pins of the power capacitor 2C 2 are respectively connected to the zero-sequence voltage bus of the incoming switch cabinet and the A, B, and C phase voltage bus, and the fourth pins of several co-complementing intelligent low-voltage power capacitors 1C 1 After the pins are connected to each other, connect to the 4th pin of the first sub-complementary intelligent low-voltage power capacitor 2C 2, and after the fifth pins of several co-complementary intelligent low-voltage power capacitors 1C 1 are connected to each other, connect To the fifth pin of the first sub-complementary intelligent low-voltage power capacitor 2C 2, after the sixth pins of several co-complementary intelligent low-voltage power capacitors 1C 1 are connected to each other, connect to the first sub-compensation type The 7th pin of the intelligent low-voltage power capacitor 2C 2, the 7th pins of several co-complementary intelligent low-voltage power capacitors 1C 1 are connected to each other, and then connected to the first sub-complementary intelligent low-voltage power capacitor 2C 2 The 9th pin of the 9th pin, the 4th to 9th pins of several sub-complementary intelligent low-voltage power capacitors 2C 2 are connected to each other, and the 11th and 12th pins of each co-complementary intelligent low-voltage power capacitor 1C 1 The pins are respectively connected to one end of two indicators HR1 3, and the other ends of several indicators HR1 3 are short-circuited and then connected to the B-phase voltage bus. The pins are respectively connected to one end of the three indicators HR2 4, and the other ends of several indicators HR2 4 are short-circuited and then connected to the zero-sequence voltage bus of the incoming switch cabinet, UA, UB, UC and UN of the reactive power compensation controller HK The terminals are respectively connected to the A, B and C phase voltage busbars and the zero-sequence voltage busbar of the incoming switchgear, and the A and B terminals of the reactive power compensation controller HK are respectively connected to the first co-compensation intelligent low-voltage power capacitor 1C 1 The 4th and 5th pins, the primary side coil of the capacitor miniature core-through current transformer TA'2 is threaded on one end of the secondary side output end of the current transformer TA8 in the incoming line switch cabinet, and the capacitor miniature core-through current transformer The two ends of the output terminal of the secondary side of TA'2 are respectively connected to pins 6 and 7 of the reactive power compensation controller HK.

There are 4 pieces of co-compensation intelligent low-voltage power capacitors 1C1, 2 pieces of sub-compensation intelligent low-voltage power capacitors 2C2, 8 indicator lights HR13, and 6 indicator lights HR24.

In this intelligent low-voltage capacitor cabinet, a number of co-complementing intelligent low-voltage power capacitors 1C 1 and several sub-complementing intelligent low-voltage power capacitors 2C 2 are all selected from TDS series intelligent low-voltage power capacitors produced by Nantong Modern Capacitor Co., Ltd.; , the model of several co-complementing intelligent low-voltage power capacitors 1C 1 is TDS-C9SZ/450V-20,20; the model of several sub-complementing intelligent low-voltage power capacitors 2C 2 is TDS-C9FZ/250V-20 and/or Or TDS-C9FZ/250V-10.

In this intelligent low-voltage capacitor cabinet, if different compensation capacities need to be achieved, an appropriate number of co-complementary intelligent low-voltage power capacitors 1C 1 and/or sub-complementary intelligent low-voltage power capacitors 2C 2 can be selected for assembly according to the needs of users. capacitor bank.

Claims (4)

1. intelligent low-voltage capacitance cabinet; Comprise cabinet shell, A, B, C phase voltage bus, switch with knifeshaped fuse QC, current transformer TA1, TA2 and TA3, ammeter PA1, PA2 and PA3 and lightning arrester FA1, FA2 and FA3; It is characterized in that: also comprise some the intellectual low voltage power capacitor 1C of apotype (1), some the intellectual low voltage power capacitor 2C of branch apotype (2), some indicator light HR1 (3), some indicator light HR2 (4) and the miniature punching current transformer of capacitor TA ' 1, TA ' 2 and TA ' 3 altogether; And total number of packages of indicator light HR1 (3) is 2 times of the total number of packages of the common intellectual low voltage power capacitor 1C of apotype (1); Total number of packages of indicator light HR2 (4) is 3 times of the total number of packages of the branch intellectual low voltage power capacitor 2C of apotype (2), and described each electric component all is loaded in the cabinet shell;

The circuit connecting relation of each electric component is: after A, B, C phase voltage bus connect switch with knifeshaped fuse QC; Pass the first siding ring of current transformer TA1, TA2 and TA3 respectively; The secondary side output of current transformer TA1, TA2 and TA3 is connected ammeter PA1, PA2 and PA3 respectively; The equal ground connection of the current output terminal of ammeter PA1, PA2 and PA3; The end of lightning arrester FA1, FA2 and FA3 is connected respectively on A, B, the C phase voltage bus; The equal ground connection of the other end of lightning arrester FA1, FA2 and FA3; Some the 1st～3 pins that are total to the intellectual low voltage power capacitor 1C of apotype (1) are connected on A, B, the C phase voltage bus respectively; The 0th～3 pin of some the intellectual low voltage power capacitor 2C of branch apotype (2) is connected on service entrance switch cabinet residual voltage bus and A, B, the C phase voltage bus respectively; After some the 4th pin of the intellectual low voltage power capacitor 1C of apotype (1) is interconnected with one another altogether; Be connected to the 4th pin of first intellectual low voltage power capacitor 2C of branch apotype (2); After some the 5th pin of the intellectual low voltage power capacitor 1C of apotype (1) is interconnected with one another altogether; Be connected to the 5th pin of first intellectual low voltage power capacitor 2C of branch apotype (2); After some the 6th pin of the intellectual low voltage power capacitor 1C of apotype (1) is interconnected with one another altogether; Be connected to the 7th pin of first intellectual low voltage power capacitor 2C of branch apotype (2), after some the 7th pin of the intellectual low voltage power capacitor 1C of apotype (1) is interconnected with one another altogether, be connected to the 9th pin of first intellectual low voltage power capacitor 2C of branch apotype (2); The 4th～9 pin of some the intellectual low voltage power capacitor 2C of branch apotype (2) is interconnected with one another respectively together; Every altogether the 11st, 12 pins of the intellectual low voltage power capacitor 1C of apotype (1) connect the end of two indicator light HR1 (3) respectively, be connected to B phase voltage bus behind the other end short circuit of some indicator light HR1 (3), the 10th, 11 of every intellectual low voltage power capacitor 2C of branch apotype (2) is connected the end of three indicator light HR2 (4) respectively with 12 pins; Be connected to service entrance switch cabinet residual voltage bus behind the other end short circuit of some indicator light HR2 (4); The first siding ring of the miniature punching current transformer of capacitor TA ' 1, TA ' 2 and TA ' 3 is through respectively on the end of secondary side output of current transformer TA7, TA8 and TA9 in the service entrance switch cabinet, and an end of the secondary side output of the miniature punching current transformer of capacitor TA ' 1, TA ' 2 and TA ' 3 is connected to the 6th, 7 and 8 pins of last intellectual low voltage power capacitor 2C of part branch apotype (2) respectively, is connected to the 9th pin of last intellectual low voltage power capacitor 2C of part branch apotype (2) behind the other end short circuit of the secondary side output of the miniature punching current transformer of capacitor TA ' 1, TA ' 2 and TA ' 3.

2. a kind of intelligent low-voltage capacitance cabinet according to claim 1; It is characterized in that: the described intellectual low voltage power capacitor 1C of apotype (1) altogether has 4; The intellectual low voltage power capacitor 2C of branch apotype (2) has 2; Indicator light HR1 (3) has 8, and indicator light HR2 (4) has 6.

3. intelligent low-voltage capacitance cabinet; Comprise cabinet shell, A, B, C phase voltage bus, switch with knifeshaped fuse QC, current transformer TA1, TA2 and TA3, ammeter PA1, PA2 and PA3, lightning arrester FA1, FA2 and FA3 and idle compensating control HK; It is characterized in that: also comprise some the intellectual low voltage power capacitor 1C of apotype (1), some the intellectual low voltage power capacitor 2C of branch apotype (2), some indicator light HR1 (3), some indicator light HR2 (4) and the miniature punching current transformer of capacitor TA ' 2 altogether; And total number of packages of indicator light HR1 (3) is 2 times of the total number of packages of the common intellectual low voltage power capacitor 1C of apotype (1); Total number of packages of indicator light HR2 (4) is 3 times of the total number of packages of the branch intellectual low voltage power capacitor 2C of apotype (2), and described each electric component all is loaded in the cabinet shell;

The circuit connecting relation of each electric component is: after A, B, C phase voltage bus connect switch with knifeshaped fuse QC; Pass the first siding ring of current transformer TA1, TA2 and TA3 respectively; The secondary side output of current transformer TA1, TA2 and TA3 is connected ammeter PA1, PA2 and PA3 respectively; The equal ground connection of the current output terminal of ammeter PA1, PA2 and PA3; The end of lightning arrester FA1, FA2 and FA3 is connected respectively on A, B, the C phase voltage bus; The equal ground connection of the other end of lightning arrester FA1, FA2 and FA3; Some the 1st～3 pins that are total to the intellectual low voltage power capacitor 1C of apotype (1) are connected on A, B, the C phase voltage bus respectively; The 0th～3 pin of some the intellectual low voltage power capacitor 2C of branch apotype (2) is connected on service entrance switch cabinet residual voltage bus and A, B, the C phase voltage bus respectively; After some the 4th pin of the intellectual low voltage power capacitor 1C of apotype (1) is interconnected with one another altogether; Be connected to the 4th pin of first intellectual low voltage power capacitor 2C of branch apotype (2); After some the 5th pin of the intellectual low voltage power capacitor 1C of apotype (1) is interconnected with one another altogether; Be connected to the 5th pin of first intellectual low voltage power capacitor 2C of branch apotype (2); After some the 6th pin of the intellectual low voltage power capacitor 1C of apotype (1) is interconnected with one another altogether, be connected to the 7th pin of first intellectual low voltage power capacitor 2C of branch apotype (2), after some the 7th pin of the intellectual low voltage power capacitor 1C of apotype (1) is interconnected with one another altogether; Be connected to the 9th pin of first intellectual low voltage power capacitor 2C of branch apotype (2); The 4th～9 pin of some the intellectual low voltage power capacitor 2C of branch apotype (2) is interconnected with one another respectively together, and the 11st, 12 pins of every common intellectual low voltage power capacitor 1C of apotype (1) connect the end of two indicator light HR1 (3) respectively, are connected to B phase voltage bus behind the other end short circuit of some indicator light HR1 (3); The 10th, 11 of every intellectual low voltage power capacitor 2C of branch apotype (2) is connected the end of three indicator light HR2 (4) respectively with 12 pins; Be connected to service entrance switch cabinet residual voltage bus behind the other end short circuit of some indicator light HR2 (4), the UA of idle compensating control HK, UB, UC and UN end are connected respectively on A, B, C phase voltage bus and the service entrance switch cabinet residual voltage bus, and the A of idle compensating control HK, B end are connected respectively to first the 4th, 5 pin of the intellectual low voltage power capacitor 1C of apotype (1) altogether; The first siding ring of the miniature punching current transformer of capacitor TA ' 2 is through on the end of secondary side output of the current transformer TA8 in the service entrance switch cabinet, and the two ends of the secondary side output of the miniature punching current transformer of capacitor TA ' 2 are connected to the 6th, 7 pins of idle compensating control HK respectively.

4. a kind of intelligent low-voltage capacitance cabinet according to claim 3; It is characterized in that: the described intellectual low voltage power capacitor 1C of apotype (1) altogether has 4; The intellectual low voltage power capacitor 2C of branch apotype (2) has 2; Indicator light HR1 (3) has 8, and indicator light HR2 (4) has 6.

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