recloser  15KV/17.5KV/24KV NKZW32-24/T1250 (630) -25 (20)

vacuum circuit breaker recloser, OEM/ODM  15KV/17.5KV/24KV NKZW32-24/T1250 (630) -25 (20) overview

In recent years, along with our country city power grid expansion and the rapid growth of electricity load, at the same time, according to the characteristics of power line in rural power network line loss long, large, the original 10kV voltage level of distribution has been difficult to meet the power requirements, gradually exposed its power over larger distances, line loss rate is high, the quality is difficult to meet the requirements of voltage etc. weakness. While the use of 20kV power supply voltage levels can increase the capability of power supply, to ensure the voltage quality, reduce network power loss and save power grid construction cost etc.. So using 20kV voltage grade power distribution is the inevitable trend of development, it is imperative to. NKZW - -24 type of outdoor high voltage AC vacuum circuit breaker is the three-phase AC 50Hz, rated voltage of 24kV Outdoor Switchgear, suitable for the opening and closing of different load and frequent operation situation, the construction and renovation of power equipment is suitable for city network, rural power grid, mines and railway etc.. The product is in absorbing foreign advanced technology, based on domestic raw materials and processes, in the early development of the 24kV outdoor high voltage switch equipment successfully fits the situation of our country, has its own intellectual property rights and patents, to fill the gaps in the domestic voltage class of 24kV Outdoor Switchgear, the characteristics of International similar products are small compared to the same period and maintenance free, intelligent etc.. At the same time the product has no pollution to the environment, is the green environmental protection product.

1、24KV真空断路器NKZW32-24/T1250(630)-25(20) 概述

近年来，随着我国城市电网的不断扩大及用电负荷的迅猛增长，同时针对农村电网供电线路长、线损大的特点，原有的10kV电压等级配电已经难以满足供电要求，逐渐暴露出其供电距离过大、线损率高、电压质量难以合乎要求等弱点。而采用20kV电压等级供电具有增加供电能力、保证电压质量、降低电网电能损耗、节省电网的建设费用等一系列优势。所以采用20kV电压配电等级供电是发展的必然趋势，势在必行。NKZW□-24型户外高压交流真空断路器是三相交流50Hz、额定电压为24kV的户外开关设备，适用于开合各种不同性质的负荷及频繁操作场合，适用于城网、农网、矿山及铁道等的电力设备建设和改造。该产品是在吸纳国外先进技术，立足于国产原材料和工艺的基础上，最早研制成功的适合我国国情的24kV户外高压开关设备，拥有自有知识产权和多项专利技术，填补了国内24kV电压等级户外开关设备的空白，同比国际同类产品具有小型化、免维护、智能化等特点。同时该产品对周围环境无污染，是绿色环保产品。                  
2、 Models and implications of product  产品型号及含义

 

3、Product features
The 1 shell adopts the high quality stainless steel material or ordinary steel plate after Dacromet antirust processing technology and spraying anti UV varnish and product, corrosion resistance, salt fog resistance of anti environmental performance.
The 2 insulating section with epoxy resin and silicone rubber composite insulation materials, high insulation level, anti contamination ability, with ozone resistance, anti ultraviolet, hydrophobicity and anti high temperature capability. The box body without transformer oil, no six sulfur hexafluoride gas, meet the transformation of non oil and environmental protection requirements.
3 operating mechanism for spring operation mechanism, there are two types of manual and electric, when needed can add the remote control device and avoid the inrush current device. The requirements of the external power supply power is less than 70W, easy to be equipped with a backup power supply. The unique design of the buffer device, excellent performance, rebound small, low noise.
4 vacuum arcing chamber adopts special stainless steel brazing technology, without plating, high welding quality, stable and reliable, low air leakage rate. Ceramic metal special formula and advanced ceramic metallization process making use of the process, to ensure the air tightness of the products, the tensile strength is more than 130Mpa, a closure line.
5 current transformer using high-quality magnetic materials and epoxy resin and silicon rubber composite insulation becomes, has the advantages of large capacity, high dynamic multiple level, precision high, maintenance free, high reliability.
6 according to the user need, can be matched with the corresponding controller composition of automatic recloser and sectionalizer, is the ideal equipment for realizing distribution automation.
The normal conditions of use
A ambient air temperature: +40 to -40 DEG C diurnal temperature range: 25K
B wind speed less than 35m/s
C, cabinet protection grade: IP64
D, consider the condensation and precipitation
E, seismic intensity does not exceed the 8 level
F, the solar radiation intensity is less than 1000W/ square meters (the equivalent of 700Pa on the surface of the cylindrical)
H, beyond the technical requirements, by the user and the factory agreement.

4, product main technical data
Table 1 main parameters of circuit breaker
Ordinal name single bit values
1 of the rated voltage of kV 24
2 A rated current 630/1250
3 of the rated frequency Hz 50
4 rated thermal stability current A 420/25k
5 of rated short-circuit breaking current of A 520/25k
6 rated dynamic stability current (peak) A 650/63k
7 of the rated short-circuit current (peak) kA 50/63
8 thermal stability time of S 4
9 of the rated operating sequence of S SO-0.3s-CO-180s-C
10 rated insulation of 1min power frequency withstand voltage phase, on / fracture of kV 50/65 levels
Rated lightning impulse withstand voltage (peak) and white, on / 95/125 fracture
The two loop 1min power frequency withstand voltage 2
11 mechanical life 10000
12 of the rated short-circuit breaking current breaking times 30
13 breaking times of rated current 10000
Table 2 the rated parameters of actuator
Ordinal name single bit values
The 1 energy storage motor power rating of W is less than or equal to 70
2 closing storage time of S is less than or equal to 8
The 3 energy storage motor working voltage of V AC220 110
DC24 110220
4 closing coil tripping voltage V AC220 110
DC24 110220
5 tripping coil tripping voltage V AC220 110
DC24 110220
6 overcurrent trip coil current A 5
Adjustment of the parameters in Table 3 circuit breaker mechanical characteristic
Ordinal name single bit values
1 contact distance mm 12 + 1
Super 2 stroke 3 + 1
3 phase center distance of 380 + 1.5
4 three-phase switching on and off different period of MS is less than or equal to 2
The 5 contact closing bouncing time less than 2
6 closing time of 25 ~ 80
7 gate time of 23 ~ 50
8 of the average opening velocity of m/s 1.1 ~ 1.7
9 average closing speed 0.5~0.9
10 main electric circuit resistance Mu omega = 100
5, structure and function characteristics of circuit breaker
The overall structure
The circuit breaker is mainly composed of an integrated solid sealed pole, current transformer, a spring mechanism, and a box body. The guide circuit of vacuum circuit breaker is composed of an upper end of the line, the vacuum interrupter contacts, a lower outgoing line end composition. Circuit breakers for miniaturization design, the circuit breaker can be installed in a two-phase or three-phase CT, its structure as shown in figure 1.
Small spring mechanism
The circuit breaker using novel miniaturized spring operating mechanism, as shown in Figure 2, by the combination of cam linkage mechanism and reduce the output power, institutions, and separating and closing time stability, small dispersibility. Closing spring special can fully meet the requirements of the characteristics of 24kV circuit breaker. Transmission mechanism by using sliding mode output shaft torque, no loss, division and fewer transmission components, high reliability requirements of external power supply power is small, easy to be equipped with a backup power supply.
Integrated solid sealed pole
Circuit breaker using a new type of composite solid insulation structure, as shown in figure 3. Are pouring in insulating cover vacuum interrupter arc quenching chamber and vacuum insulation integration makes, greatly improves the insulation performance, using epoxy resin and silicone rubber composite insulation materials, protection of vacuum interrupter appearance is not affected by the surrounding environment pollution, improve the ability of insulation and anti contamination and antifogging, and increases resistance to ozone, ultraviolet resistant, anti-aging ability, at the same time, the mechanical strength is greatly improved. The vacuum interrupter, the main circuit and the insulating support and other organic combination for an integrated solid sealed pole. The design for the whole sealing, insulation, maintenance free structure, completely solved the contradiction of vacuum arc extinguish chamber miniaturization and satisfy the requirement of external insulation. Through the tube to make excellent insulation high-voltage circuit to cut off the power supply of the vacuum interrupter can rapidly extinguish the arc and to suppress the current and arcing time is short, low arc voltage, arc energy is small, contact wear less, allowing the breaking times more. Design with the international patent unique R contact design, become the high strength longitudinal magnetic field, strong breaking capacity, high reliability; contact for integrated, no arc groove, surface geometry of perfect, high pressure resistance, good mechanical strength, and the opening and closing process without deformation; extinguishing arc chamber internal loop resistance is small, the internal uniform electric field contact closure, low value, has the ability to reliably cut capacitive, inductive load.
The current transformer is integrated arranged on the switch body, its shape as shown in Figure 4, this product adopts the high quality magnetic material and epoxy resin and silicon rubber composite insulation becomes, has the advantages of large capacity, high dynamic multiple, precision grade high, maintenance free, high reliability. Can be configured according to customer needs a single measurement, single protection, metering and protection current transformer with one, 100, 200, 400, 600, 800, 1000, a variety of 1250A ratio for the user to choose, 0.2 grade, 0.5 grade, 10P10 grade and other precision for the user to choose.
Size 6, product and installation method
See figure size of circuit breaker is shown 5
Installation of circuit breaker can be a single rod installation, as shown in figure 6.
Before installation, should check carefully the operating components of the rated voltage, rated current and the actual situation of compliance. And the breaker points, closing the trial operation, to check all the action is right or not. Circuit breaker using environment should comply with the provisions of the scope, if exceed must negotiate with our company.

7, installation and use instructions
Circuit breaker in the installation and use of the former should check the following:
A) appearance of any damage and rupture;
B) close, signs, storage indicator is off, missing;
C) box body and a box cover is a deformation, and check the seal;
D) of fasteners;
E) manual and electric operation of circuit breaker, divided into 10 times, switching should be reliable;
F) for power frequency withstand voltage test.
8, notice
A) type of circuit breaker, name, quantity, rated current and short-circuit breaking current;
B) the operating mechanism of the operating mode (manual, electric or with remote control), operating power supply type and rated value;
C) with the transformation ratio of current transformer;
D), name and quantity of spare parts;
E) the date of delivery, delivery location, transportation form;
D) user if you have special requirements, please specify when ordering.
In 9, the matters needing attention
A) handling process do not sealed insulating pillar in the current transformer and hard.
B) the operation personnel shall carefully read the manual, master the method of operation of the equipment, the problem in the operation should be recorded, promptly notify the manufacturer.
C) users are not free to replace parts, shall not change lines, provoke problems should contact the manufacturers in a timely manner.
D) installation, ensure the bottom box switch mounting surface and the mounting frame to maintain the level, if uneven phenomenon, need to level up.
24KV type NKZW32 permanent magnetic vacuum circuit breaker
NKZW32-24（永磁）真空断路器为组合式系列化产品：可选配组合隔离开关，为线路检修提供可视断口；断路器配用永磁操动机构，与真空灭弧室形成最良好的配合完成操作功能，合分动作稳定可靠；整个产品设计先进合理、结构紧凑，箱体完全密封，内部无凝露，机件无锈蚀，开关可靠性大大提高；采用新型复合固体绝缘结构，将真空灭弧室、主导电回路、绝缘支撑等有机地组合成为一个集成固封极柱，彻底解决了真空灭弧室小型化与满足外绝缘要求的矛盾；套管水平布置，输出与输入端是横向布置，即便于架空线联接，也利于电缆的接入；选配的隔离开关带有手动操动机构，两者构成机械防误操作闭锁；断路器的外壳有不锈钢和普通钢板经达克罗防锈处理两种可选，可达到在有效使用期（10年）内无需油漆维护；智能控制单元内的电源系统保证在系统失电时提供至 24 hours less battery continuous power supply, the switch can be controlled by reliable action.
Because NKZW32-24 (Yong Ci) vacuum circuit breaker used a number of patented technologies, so it has many advantages: no SF6, no oil, less affected by the environment, favorable for environmental protection; unit of small size, light weight and convenient column installation; the intelligent control unit is compact application can simply install in the columns below, optional wireless remote control, can control the switch of the division in the scope of 30 meters; and is suitable for urban and rural power grid operation on the spot and remote control; in addition to a battery replacement every 5 years, the circuit breaker body basic lifelong maintenance.
The second chapter product features and reference standard
NKZW32-24 (Yong Ci) vacuum circuit breaker in microprocessor technology, modern network communication technology and the new switch manufacturing technology in one. It is specifically designed to meet the demand of distribution automation, can realize the function of all kinds of measurement, protection and control.
Compared with the traditional electrical device which has the following characteristics: (1) performance is good, the reliability is high; (2) the hardware software; (3) with on-line monitoring and self diagnosis function; (4) to adapt to harsh environment, can run on the -40 to +85 DEG C temperature range safety environment.
It has communication powerful processing function: the realization of local parameter setting and programming of RS-232 interface; through the RS-485 interface, LonWorks, optical Modem and optical fiber Ethernet realization system networking and wireless data transmission function.
The product fully sealed structure design; casing in addition to epoxy support, there is no longer any supplementary insulation materials; the sleeve horizontal layout, output and input end is transversely arranged, even for overhead line connected, but also conducive to the cable access; the overall molding casing, ensure good airtightness.
630A load shedding operation more than 30000 times, less maintenance. Removal of 20kA was more than 30 times the rated short circuit current.
Configurable isolation switch, have obvious breaking point, convenient maintenance, safety.
The products are shown in the specification are in line with the following standards and specifications:
GB1984 "AC high voltage circuit breaker"
General technical conditions "GB11022" high voltage switch equipment
GB311.1 "insulation coordination of high voltage transmission and transformation equipment"
DL/T 593 "high voltage switch equipment common order technical conditions"
DL/T 402 "AC high voltage circuit breaker order technical conditions"
GB763 "AC high voltage electrical work in long time heating"
GB2706 "AC high voltage electric power and thermal stability test method"
GB3309 "mechanical test of high voltage switch equipment at room temperature"
DL403 "10 ~ 35kV indoor high voltage vacuum circuit breaker order technical conditions"
General technical conditions "GB/T13729-1992" remote terminal unit
GB/T15153.2 "working conditions of telecontrol equipment and systems of" environmental conditions (IDT IEC870-2-2:1996)
GB/T15153.1-1998 "telecontrol equipment and systems part second: operating conditions" (IDT IEC870-2-1:1995)
DL/T630-1997 "AC sampling remote terminal technical conditions"
GB/T17626.4 - 1998 "electromagnetic compatibility: burst immunity test transient testing and measurement techniques," (IDT IEC61000-4-4:1995)
IEC61334-5-1:1999 "Distribution Automation using distribution line carrier systems Communication Protocols

3产品特点
1外壳采用优质不锈钢材料或普通钢板经达克罗防锈处理工艺再喷涂耐紫外线清漆而成，产品的防腐蚀性、防盐雾性等抗环境性能优良。
2绝缘部分采用环氧树脂和硅橡胶复合绝缘材料，绝缘等级高，防污秽能力强，具有耐臭氧、抗紫外线、疏水性和抗高低温能力。箱体内无变压器油、无六氟化硫气体，满足无油化改造和环境保护要求。
3操作机构为弹簧操作机构，有手动和电动两种，需要时可加装遥控操作装置和躲避合闸涌流装置。要求的外供电源功率不大于70W，易于配备后备电源。设计独特的缓冲装置，性能优异，反弹小，噪声低。
4灭弧室采用特种不锈钢钎焊技术，无需电镀，焊接质量高，稳定可靠，漏气率低。制作工艺上使用特殊的陶瓷金属化配方和先进的陶瓷金属化工艺，保证了产品的气密性，抗拉强度大于130Mpa，完全一次封排。
5电流互感器采用优质导磁材料及环氧树脂与硅橡胶复合绝缘而成，具有容量大，动热稳定倍数高、精度等级高、免维护、可靠性高等优点。
6根据用户需要，可与相应的的控制器配合构成自动重合器、分段器，是实现配网自动化的理想设备。
正常使用条件
a周围空气温度：+40℃～-40℃ 日温差：25K
b风速不大于35m/s
c、机箱防护等级为IP64
d、考虑凝露和降水
e、地震烈度不超过8级
f、太阳辐射强度不超过1000W/㎡（相当于圆柱表面上的700Pa）    
h、超出本技术条件的要求，由用户和制造厂协定。      

4、产品主要技术数据
表1断路器的主要技术参数

小型化弹簧机构
该断路器采用新型小型化弹簧操动机构，如图2所示，由凸轮－连杆机构组合而成，减小了机构的输出功，并且分、合闸时间稳定，分散性小。特制的合闸簧能充分满足24kV断路器的特性要求。机构传动输出采用主轴滑动方式，无扭力损耗，分合传动件少，可靠性高，要求外供电源功率小，易于配备后备电源。 

 集成固封极柱
断路器采用新型复合固体绝缘结构，如图3所示。真空灭弧室分别浇装在绝缘罩内，使真空灭弧室与绝缘一体化，大大提高了其绝缘性能，采用环氧树脂和硅橡胶复合绝缘材料，保护真空灭弧室的外表不受周围环境的污染，提高了绝缘性能和防污秽、防凝露的能力，并提高了耐臭氧、抗紫外线、抗老化能力，同时大大提高了机械强度。真空灭弧室、主导电回路、绝缘支撑等有机地结合为一个集成固封极柱。该设计为全密封、全绝缘、免维护结构，彻底解决了真空灭弧室小型化与满足外绝缘要求的矛盾。该真空灭弧室通过管内真空优良的绝缘性使高压电路切断电源后能迅速熄弧并抑制电流，燃弧时间短、电弧电压低、电弧能量小、触头磨耗少、允许的开断次数多。设计上采用拥有国际专利的独特的R触头设计，形成高强度纵向磁场，开断能力强，可靠性高；触头集成化，无引弧槽，表面几何形状完美，耐压高，机械强度好，并且开合过程无变形；灭弧室内部回路电阻小，内部电场均匀，触头截流值低，具有可靠的切容性、感性负载的能力。
 

 电流互感器为一体式安装在开关本体上，其外形如图4所示，该产品采用优质导磁材料及环氧树脂与硅橡胶复合绝缘而成，具有容量大、动热稳定倍数高、精度等级高、免维护、可靠性高等优点。可根据客户需要配置单计量，单保护，计量、保护一体电流互感器，有100、200、400、600、800、1000、1250A等多种变比可供用户选择，有0.2级、0.5级、10P10级等多种精度可供用户选择。  

6、产品的外形尺寸及安装方式
断路器的外形尺寸见图5所示
 

断路器的安装方式可单杆安装，如图6所示。
安装前，应仔细核对各操作元件的额定电压、额定电流与实际情况是否相符。并对断路器进行分、合闸试操作，以检查各种动作是否正确。 断路器使用的环境应符合规定的范围，若超过必须与 我公司协商。
 

7、安装和使用说明
断路器在安装和使用前应进行以下检查：
a)外观是否有损伤和破裂；
b)合、分指示牌、储能指示牌是否脱落、漏装；
c)箱体、箱盖是否有变形，并检查其密封性；
d)紧固件是否松动；
e)手动、电动操作断路器合、分10次，分合闸应可靠；
f)进行工频耐压试验。  

8、订货须知
a)断路器型号、名称、数量、额定电流及短路开断电流；
b)操作机构的操作方式(手动、电动或带遥控)、操作电源种类及额定值；
c)所配电流互感器变比；
d)备品、备件名称及数量；
e)交货期、交货地点、运输形式；
d)有户若有特殊要求，请在订货时说明。

9、注意事项
a)搬运过程中请勿在固封绝缘支柱及电流互感器上用力。
b)操作人员应仔细阅读使用手册，掌握该设备的操作方法，对运行中的问题应予 以记录，及时通知厂家。
c)用户不得随意更换零部件，不得更改线路，惹出现问题应及时向厂家联系。
d)安装时，保证开关的底箱安装面与安装架保持水平，若有不平现象，需垫平。