1. Function: The distribution cabinet has overhead incoming and outgoing lines Cable Incoming and outgoing lines, bus connection and other functions.
2. Composition: distribution cabinet shall meet GB3906-1991"3-35 kV AC metal enclosure switch equipment " The relevant requirements of the standard are composed of the cabinet and the circuit breaker. The cabinet consists of the shell and electrical components ( Including insulation ) , various mechanisms, secondary terminals and wiring, etc.
Cabinet material
1) Cold ligation steel plate or Angle steel ( For welding cabinet ) ；
2) Aluminum coated zinc steel plate or galvanized steel plate ( For assembling cabinet ) ；
3) Stainless steel plate ( Nonmagnetic ) ；
4) Aluminum plate (( Nonmagnetic ) 。
functional unit
1) Main bus room (general layout of main bus is as follows “ product ” Glyph or “1” Two types of font structure)
2) Circuit breaker room
3) Cable room
4) Relay and instrument room
5) Small busbar room on top of cabinet
6) Secondary terminal room
Components in the cabinet
one Common primary electrical components in the cabinet ( Main circuit equipment ) Common equipment are as follows:
Current transformer CT[ For example: LZZBJ9-10]
Abbreviation of voltage transformer PT[ as :JDZJ-10]
Switch cabinet
Earthing switch [ as :JN15-12]
Lightning arrester ( Resistance capacitance absorber )[ as :HY5WS Single phase type ; TBP 、 JBP Combined type ]
Isolating switch [ as :GN19-12 、 GN30-12 、 GN25-12]
High voltage circuit breaker [ For example: less oil type (S) Vacuum type (Z) 、 SF6 type (L)]
High voltage contactor [ For example: JCZ3-10D/400A type ]
High voltage fuse [ For example: RN2-12 、 XRNP-12 、 RN1-12]
transformer [ as :SC(L) Series dry transformer S Series oil transformer ]
High voltage live display [DXN-Q type ,DXN-T type ]
Insulator [ as : Wall bushing, contact box, insulator, insulation heat shrink ( Cold shrink ) sheath ]
Main bus and branch bus
High voltage reactor [ Such as series type :CKSC And starter type :QKSG]
Load switch [ as :FN26-12(L) 、 FN16-12(Z)]
High voltage single-phase shunt capacitor [ as :BFF12-30-1] wait
two Main secondary elements commonly used in the cabinet ( Also called secondary equipment or auxiliary equipment, it refers to low-voltage equipment that monitors, controls, measures, adjusts and protects primary equipment ), Common equipment are as follows :
Relay, watt hour meter, ammeter, voltmeter, power meter, power factor meter, frequency meter, fuse, air switch, change-over switch, signal lamp, resistance, button, microcomputer integrated protection device, etc
classification
Press the circuit breaker
According to the installation mode of circuit breaker, it can be divided into movable type ( Handcart type ) And fixed
(1) Portable or handcart type ( use Y express ) : indicates the main electrical components in the cabinet ( as : Circuit breaker ) It is installed on the withdrawable handcart, because the handcart cabinet has good interchangeability , Therefore, the reliability of power supply can be greatly improved. The commonly used handcart types are : Isolation handcart, metering handcart, circuit breaker handcart PT Handcart, capacitor handcart and used variable handcart, such as KYN28A-12 。
(2) Fixed ( use G express ): All electrical components in the cabinet ( as : Circuit breaker or load switch, etc ) All are fixed installation, and the fixed switchgear is relatively simple and economical, such as XGN2-10 、 GG-1A Etc.
By location
Indoor and outdoor according to installation location
(1) For indoor use ( use N express ); It indicates that it can only be installed and used indoors, such as: KYN28A-12 Switch cabinet ;
(2) For outdoor use ( use W express ); It indicates that it can be installed and used outdoors, such as : XLW Etc.
According to cabinet structure
According to the cabinet structure, it can be divided into four categories: metal enclosed armored switchgear, metal enclosed bay switchgear, metal enclosed box switchgear and open switchgear
(1) Metal enclosed armored switchgear ( Use letters K To represent ) Main components ( For example: circuit breaker Transformer, bus, etc ) Metal enclosed switchgear separately installed in grounded compartments separated by metal partitions. as KYN28A-12 High voltage switchgear.
(2) Metal enclosed compartment switchgear ( Use letters J To represent ) Similar to the armored metal enclosed switchgear, its main electrical components are also installed in separate compartments, but there are one or more non-metallic diaphragms that meet a certain degree of protection. as JYN2-12 High voltage switchgear.
(3) Metal enclosed box type switchgear ( Use letters X To represent ) The enclosure of the switchgear is metal enclosed switchgear. as XGN2-12 High voltage switchgear.
(4) Open switch cabinet has no protection level requirements, and the enclosure is partially open switchgear. as GG-1A(F) Type HV switchgear
After the vacuum circuit breaker trolley in the "five prevention" low-voltage distribution cabinet is closed at the test position, the trolley circuit breaker cannot enter the working position. (Prevent on load closing)
two When the grounding knife in the high-voltage distribution cabinet is closed, the trolley circuit breaker cannot be closed. (Prevent closing with grounding wire)
three When the vacuum circuit breaker in the high-voltage distribution cabinet is closed The rear door is locked with the cabinet door by the machine on the grounding knife. (Prevent from entering the charged interval by mistake) .
four The vacuum circuit breaker in the high-voltage distribution cabinet is closed during operation, and the grounding knife cannot be put into operation when closing. (Prevent the electrified grounding wire)
five The vacuum circuit breaker in the high-voltage distribution cabinet cannot exit from the working position of the trolley circuit breaker when it is working and closing. (Prevent loaded broach)
Details
KYN61-40.5 Type A armored removable AC metal enclosed switchgear
Product use
This product is suitable for three-phase AC 50Hz ， 40.5kV In the single bus sectionalized power system, it is used to receive and distribute electric energy in the power transformation and distribution of power plants, substations, industrial and mining enterprises and high-rise buildings, and control, protect and monitor the circuit to meet IEC60298 ， DL404 With perfect “ Five prevention " Function.
Service conditions
one , Around Upper limit of air temperature 40℃ lower limit -10℃
two 、 Altitude: no more than 1000m
three , Humidity
Relative humidity: daily average value is not greater than 95% , monthly average no more than 90% ；
Saturated vapor pressure: daily average value is not more than 2.2×10 Mpa , monthly average no more than 1.8×10 Mpa 。
four . The seismic intensity does not exceed eight Degree;
five The surrounding air shall not be obviously polluted by corrosive, combustible gas, steam, etc;
six No frequent severe vibration.
When the service conditions of the switch cabinet exceed the above provisions, it shall be determined by the user through consultation with the manufacturer.
Product features
one . Heat shrinkable Insulating materials and epoxy coating insulation process, optimize the shape of the electrical comparison, compact cabinet structure, and reduce the floor area;
two The switch cabinet body is made of high-quality cold-rolled steel after CNC sheet metal processing and is connected by height bolts and nuts and riveted nuts. The surface of the component is sprayed with plastic or galvanized;
three , can be used Nanyang Electric Appliance Factory ZN85-40.5 Vacuum circuit breaker and Schneider, France SF1 、 SF2 Type and Alstom FP system SF6 circuit breaker to meet the needs of different users;
four All functional compartments of the switch cabinet are sealed with metal plates and equipped with separate pressure release channels;
five . Circuit breaker, grounding switch and other operations can be carried out when the switch cabinet is closed to realize the door closing operation;
six The switch cabinet has strong structural adaptability, and the main wiring scheme can achieve one hundred and ninety-eight More than, can meet the needs of different users;
seven Mechanical interlock device to prevent misoperation is set between handcart, circuit breaker, grounding switch and rear cabinet door, “ Five defenses ” Fully functional, safe and reliable.
Main technical parameters
Rated voltage 40.5KV
Rated frequency 50Hz
Rated current of main bus 1250A 、 1600A 、 2000A
Rated current of branch bus 630A 、 1250A 、 1600A
Rated insulation level（ 1min Power frequency withstand voltage: phase to phase, relative 95KV , once Isolation fracture 115KV 。 Lightning impulse Withstand voltage: phase to phase, phase to phase 185KV , primary isolation fracture 215KV 。 Auxiliary control circuit 1min Power frequency withstand voltage: 2KV ）
Overall dimension (width * deep * High) 1400*2800 （ three thousand ） *2800
KYN44(KYN28)-12 Type A armored removable AC metal enclosed switchgear
Product use
This switchgear is suitable for three point six ～ 12kV Three phase AC 50Hz Complete set of power distribution device for single bus and single bus section system, mainly used in power plants, small and medium-sized Generator power generation, power distribution of industrial, mining, enterprises and institutions, as well as the power receiving and transmission of the secondary substation of the electric power system, and the starting of large high-voltage motors are used for control, protection and monitoring. This switchgear complies with GB3906 ， DL404 Standard and all IEC298 。
This switch cabinet can be used VD4 Type VB2 Type VS1 Type HVF (Hyundai) EV12 Type vacuum circuit breaker, which can prevent loaded push-pull circuit breaker handcart, prevent false opening and closing of the circuit breaker, prevent the grounding switch from closing the circuit breaker in the closed position, prevent entering the electrified isolation chamber by mistake, and prevent false closing when electrified
Service conditions
one Ambient temperature -10℃ to 40℃
two Altitude: no more than 1000m
three , Humidity
Relative humidity: daily average value is not greater than 95% , monthly average no more than 90%
four . The seismic intensity does not exceed eight Degree;
five The surrounding air shall not be obviously polluted by corrosive, combustible gas, steam, etc;
six There is no serious pollution and frequent severe vibration.
seven , over GB3906 When used under normal environmental conditions specified in this standard, the user and the manufacturer shall negotiate.
Product features
one The switchgear has a fully armored structure, low-voltage and high-voltage are separated, and there are plenty of wire rooms. Multiple groups of cables can be installed. The cable terminal can be higher than the ground 800mm ；
two The solid and reliable five prevention interlocking device can also operate the circuit breaker on the closed panel, and the state of the circuit breaker can be seen through the observation window;
three Handcart with complete functions, high standard Handcart interchangeability, light and smooth operation;
four Simple maintenance, easy installation of bus and cable, elevating transfer car, and convenient pushing, pulling out and transportation of handcart;
five The fully assembled switchgear is made of aluminum coated steel plate, which is corrosion resistant and has a soothing effect. Multiple folding process is adopted to ensure high strength and rigidity.
Main technical parameters
Rated voltage 10KV
Higher voltage 12KV
Rated insulation level（ 1min Power frequency withstand voltage: to ground and phase to phase 42KV , between primary fractures 48KV 。 Lightning impulse withstand voltage: to ground and phase to phase 75KV , between primary fractures 85KV 。）
Rated short-circuit breaking current 16KA 、 20KA 、 25KA 、 31KA 、 5KA 、 40KA 、 50KA
