CN2217273Y

CN2217273Y - High voltage switch cabinet for 10 KV cable

Info

Publication number: CN2217273Y
Application number: CN 95203887
Authority: CN
Inventors: 朱炳培
Original assignee: ZHANJIANG UNIVERSAL ELECTRIC APPLIANCE GROUP CORP
Current assignee: ZHANJIANG UNIVERSAL ELECTRIC APPLIANCE GROUP CORP
Priority date: 1995-02-25
Filing date: 1995-02-25
Publication date: 1996-01-10
Anticipated expiration: 2005-02-25

Abstract

The utility model relates to a high voltage switch cabinet for the 10KV cable. The utility model is composed of a cabinet body, a high-voltage bus bar, an SF6 circuit breaker, a high-voltage isolating switch, a misoperation preventing mechanism and an electric interlocking part. The utility model is characterized in that the high-voltage bus bar are reversedly fixed in a high-voltage stanchion porcelain insulator, the high-voltage isolating switch and the back SF6 circuit breaker form a misoperation preventing mechanical interlock by the handle of the high-voltage isolating switch, the lower side of the cabinet body is provided with a small door, and the small door and the gate of the SF6 circuit breaker form an electric interlock. The utility model has the advantages of simple structure, good arc extinguishing property, good insulating property and safe operation, the area of the switch house of cables is reduced, the construction cost is reduced, and the fires, the combustion, the explosion, etc. danger can be eliminated.

Description

10 kv cable high-tension switch cabinets

The utility model belongs to a kind of 10 kv cable high-tension switch cabinets.

At present, high-tension switch cabinet has of all kinds, and as patent 92213412.8 cabinets, it isolates power blade of knife switch and cam pressing plate interlinked mechanism function singleness, and safe and reliable inadequately, arc extinguishing and insulation property are poor, and electric life is short, and is seldom popular with users.

The purpose of this utility model is to provide a kind of arc extinguishing and excellent insulation performance, and is safe and reliable to operation, and the 10 kv cable high-tension switch cabinets that the anti-misoperation function is high are exclusively used in the switch and the protection of 10 kv cables.

The utility model is by cabinet, high pressure busbar, sulfur hexafluoride breaker, high voltage isolator, anti-misoperation mechanism, electrical interlocks are partly formed, the high-voltage strut porcelain vase is with the fixing high pressure busbar (1) of upside-down mounting form, high pressure busbar (1) is totally-enclosed in cabinet (12), observation window (10) is housed on the cabinet face, isolating switch (2) is equipped with in observation window (10) back, isolating switch (2) connects sulfur hexafluoride breaker (3), and isolating switch (2) forms the anti-misoperation mechanical interlocking with sulfur hexafluoride breaker (3) by isolating switch handle and connecting rod mechanism; Electric contact pressure vacuum gauge (9) is equipped with at switch cubicle face middle part, Pressure gauge (9) connects with SF6 circuit breaker (3) body, contact (13) Pressure gauge (9) right side is housed on the Pressure gauge (9) button and the signal lamp (8) that Guan Hehe cut-offs circuit breaker is housed, the spring operating mechanism (6) of circuit breaker (3) protrudes in outside the cabinet (12), wicket (4) is housed, electrical interlock between wicket (4) and circuit breaker (3) below the cabinet (12); When high-tension switch cabinet was incoming line cabinet, high voltage isolator (2) was contained in below the circuit breaker (3), and the three-phase high-voltage cable inserts circuit breaker by ground through isolating switch, picks out through current transformer, and current transformer is contained on the movable feeler lever of breaker body.When high-tension switch cabinet was the outlet cabinet, isolating switch (2) was contained in above the circuit breaker (3), and the three-phase high-voltage cable is by circuit breaker, and current transformer picks out after connecting isolating switch (2).

The utility model is simple in structure, and is easy to use, safe and reliable to operation, and the time between overhauls(TBO) did not reach more than 10 years.Not only reduce cable switch room area, reduce project cost, arc extinguishing and excellent insulation performance electric life are long, and can eliminate danger such as fire, burning and blast.

Description of drawings:

Fig. 1 is the utility model front view;

Fig. 2 is the utility model structure side view;

Fig. 3 is the utility model circuit breaker control circuit figure;

Fig. 4 is the utility model circuit breaker overcurrent separating brake protection circuit figure;

Fig. 5 is the utility model interlocking schematic diagram.

As Fig. 1, shown in Figure 2, high pressure busbar (1) is totally-enclosed in switch cabinet (12), the fault of avoiding outer high pressure electric shock accidents of case or foreign matter to cause fully, isolating switch (2) is equipped with in watch window (10) back can observe isolating switch (2) folding condition, switch cubicle center load contact pressure vacuum gauge (9) is measured the pressure of circuit breaker SF6 gas, Pressure gauge (9) right side toggle switch (11) and " opening " about closing and cut-off circuit breaker, " close ", the indicator light of " energy storage finishes " (8) shows, the CT8 remodeling spring actuation mechanism (6) of circuit breaker protrudes in outside the cabinet panel, can carry out manual energy storage easily, manually close and close, manually cut-off operation, the operating grip of isolating switch (7) is contained in the positive right side of face of switch cubicle, and is easy to operate.Wicket (4) is contained in below the switch cubicle, between wicket (4) and circuit breaker (3) reliable electrical interlocks is arranged, and when wicket (4) when opening, circuit breaker (3) is separating brake immediately, guarantees to enter that personnel can not contact high pressure in the switch-box.As shown in Figure 5, reliable handle and connecting rod interlocking device is arranged between high voltage isolator (2) and the SF6 circuit breaker (3), when breaker closing, isolating switch can not close branch; When breaker open operation, isolating switch can not close branch; When breaker open operation; isolating switch can close branch; as shown in Figure 3; the sulfur hexafluoride breaker control circuit is by energy storage motor; travel switch; auxiliary switch; closing coil; switching winding is formed; energy storage motor D forms tank circuit by toggle switch (11) joining power; illuminating lamp X forms lighting loop by toggle switch (11) joining power; switch knob HA (8) is by auxiliary switch FK1; closing coil HX joining power forms closing circuit; opening button TA (8) is by auxiliary switch FK2; switching winding TX connects power supply and forms sub-gate circuit; auxiliary switch FK3 is connected power supply and forms the sub-gate signal loop with sub-gate signal lamp FD; auxiliary switch FK4 forms the switching signal loop by switching signal lamp HD joining power; FK1; FK2; FK3; the FK4 electrical interlock; the contact that the normally opened contact of the contact of switch knob TA and auxiliary switch FK2 by Pressure gauge (9) is connected auxiliary switch FK3 and auxiliary switch FK4 is linked to be the pressure protection loop that descends, and also can be connected in series signal lamp on the protector road; electric bell; buzzer; relay.From the cabinet face toggle switch (11) that closes, the motor D energy storage, energy storage finishes, and the normally opened contact of travel switch LK is connected, and BD is bright for the energy storage signal lamp; Press switch knob HA (8), closing coil HX action, auxiliary switch K4 connects, and KD is bright for the switching signal lamp, and motor D is energy storage once more, and BD is bright for the energy storage signal lamp; Be lower than 0.2MPa when electric contact pressure vacuum gauge air pressure shows, manometric contacting is connected switching winding TX, switching winding TX action, and as shown in Figure 4, circuit breaker overcurrent separating brake protective circuit is A phase current mutual inductor CT _ATake off and coil TQ by overcurrent _ALoop ground connection, C phase current mutual inductor CT _CBy overcurrent tripping coil TQ _CLoop ground connection, B phase current mutual inductor CT _BBy ammeter loop ground connection.A, C go up the current transformer of each installing mutually, are used for when primary current overload or a line short, and the overcurrent release of the secondary current drive mechanism side of current transformer output disconnects circuit breaker.

The combination of switch cubicle can be that an incoming line cabinet adds several outlet cabinets, each outlet can be had a power failure and recovery is sent separately.

Claims

1, a kind of 10 kv cable high-tension switch cabinets, by cabinet, the high pressure busbar, sulfur hexafluoride breaker, high voltage isolator, anti-misoperation mechanism, electrical interlock is partly formed, it is characterized in that: the high-voltage strut porcelain vase is with the fixing high pressure busbar (1) of upside-down mounting form, high pressure achievement row (1) is totally-enclosed in cabinet (12), observation window (10) is housed on the cabinet face, isolating switch (2) is equipped with in observation window (10) back, isolating switch (2) connects sulfur hexafluoride breaker (3), and isolating switch (2) forms the anti-misoperation mechanical interlocking with sulfur hexafluoride breaker (3) by isolating switch handle and connecting rod mechanism; Electric contact pressure vacuum gauge (9) is equipped with at switch cubicle face middle part, Pressure gauge (9) connects with SF6 circuit breaker (3) body, contact (13) is housed on the Pressure gauge (9), button and the signal lamp (8) that Guan Hehe cut-offs circuit breaker then is equipped with on Pressure gauge (9) right side, the spring operating mechanism (6) of circuit breaker (3) protrudes in outside the cabinet (12), wicket (4) is housed, wicket (4) and the same electrical interlock of circuit breaker (3) below the cabinet (12); When high-tension switch cabinet was incoming line cabinet, high voltage isolator (2) was contained in below the circuit breaker (3), and the three-phase high-voltage cable inserts circuit breaker by ground through isolating switch, picks out through current transformer, and current transformer is contained on the movable feeler lever of breaker body.

2, according to the described device of claim 1, it is characterized in that: when high-tension switch cabinet was the outlet cabinet, isolating switch (2) was contained in above the circuit breaker (3), and the three-phase high-voltage cable is by off port, and current transformer picks out after connecting isolating switch (2).

3; according to claim 1 or 2 described devices; it is characterized in that: the sulfur hexafluoride breaker control circuit is by energy storage motor; travel switch; auxiliary switch; closing coil; switching winding is formed; the energy storage motor device forms tank circuit by toggle switch (11) joining power; illuminating lamp X forms lighting loop by toggle switch (11) joining power; switch knob HA (8) is by auxiliary switch FK; closing coil HX joining power forms closing circuit; opening button TA (8) is by auxiliary switch FK2; switching winding TX connects power supply formation branch and explains signal circuit; auxiliary switch FK4 forms the switching signal loop by switching signal lamp HD joining power; FK1; FK2; FK3; the FK4 electrical interlock; the contact that the normally opened contact of the contact of switch knob TA and auxiliary switch FK2 by Pressure gauge (9) is connected auxilliary power switch FK3 and auxiliary switch FK4 is linked to be pressure and descends and protect the loop, also can be connected in series signal lamp on the protector road; electric bell; buzzer; relay.

4, according to claim 1 or 2 described devices, it is characterized in that: circuit breaker overcurrent separating brake protective circuit is A phase current mutual inductor CT _ATake off and coil TQ by overcurrent _ALoop ground connection, C phase current mutual inductor CT _CTake off and coil TQ by overcurrent _CLoop ground connection.

5, according to claim 1 or 2 described devices, it is characterized in that: the combination of incoming line cabinet and outlet cabinet can be that an incoming line cabinet adds several outlet cabinets.