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H.V.current limiting fuse for protection of transformer
Categories:High Series   
◆Type instruction

◆Applying For appropriate Fuses

Transtormer capacity Primary voltage of the transformer (phase to phase)
12KV 15.5KV
Rated Current of fuse-link
200 20 20
225 25 20
300 31.5 25
500 50 40
750 63 50
◆order number
Rated Current Fuse-link Order Number Fuse-base Order Number
20 ZGR2-20 ZGR2-D
25 ZGR2-25
31.5 ZGR2-31.5
40 ZGR2-40
50 ZGR2-50
63 ZGR2-63



◆General

Type ZGR2 (XRNT4)-15.5 H.V.Current-limiting fuse for protection of transformer(here-under fuse)is a full range fuse,it is available for H.V.indoor electric system,with rated voltage 15.5KV,rated cu rrent up to 63A,50Hz a.c..It is used for protecting from overload and short-circuit for power transformer.

◆Standard
Accord with GB 15166.2 Alternating-current high-voltage fuses Current-limiting fuse
◆Construction

The fuse consists of a fuse-link, a fuse carrier and a fuse-mount.Each side of the fuse-link should be inse rted into the connecting-cartridge and fixed by a bolt tightly then put it into the fuse-mount.

◆Basic parameters
Rated Voltage MAX.Voltage
15.5 17.2
Rate current of the fuse
63
Rate current of the fuse-link
20、25、31.5、40、50、63、80*、100*
Rate breaking capacity
50
Operating condition
In the air and oil of transtormer
雷电冲击耐受电压分值 KV
对地75 断口110
Note: *parrallel fuse application (order two fuses)

◆Installation Dimensios
图1熔断件外形尺寸
图2熔断器支持件的外形尺寸及安装尺寸
熔断器安装与外形尺寸

图2熔断器支持件的外形尺寸及安装尺寸
熔断件安装




The Timecurrent Characteristic Of The Fuse
时间-电流特性曲线

◆Genera

□XRNT□(ZGR2)-40.5变压器保护用高压限流全范围熔断器, 适用
于 交流50Hz,额定电压40.5KV的电力系统。作为电力变压 器及其
它 电力设备的过载和短路保护。是电力系统中作为电力 压器的过载
和 短路故障的保护元件。主要安装于美式箱变中,可 与其它电器元
件 共箱。当电流超过规定值一定时间后,以它本身 的热量使熔体熔
化 而开断电路的开关装置。

◆基本参数Basic parameters
rated voltage KV 熔断器额定电流 A 熔断器额定电流 A 熔断最大开断电流 KA
40.5 40 20、25、31.5、40 31.5

◆Type instruction

◆Construction
熔断器由熔断件,底座和载熔件(手柄)组成,结构为插入式。
熔断件外形为圆柱形。它由玻纤环氧熔管、触头圆帽、熔体、云母骨架、石英砂组成。
熔断件的两端分别插入载熔件的接触柱内,并用紧定螺钉固定与载熔件连为一体。底座端半圆凹槽内垫上O型密封圈, 将安装熔断件的载熔件插入底座,旋上帽盖,插入及持件。
熔断器的外形尺寸及安装尺寸
熔断件的外形尺寸见图1。熔断器的安装尺寸和外形尺寸见图2。



◆Installation Dimensios
图2 熔断器的外形尺寸及安装尺寸
◆支持件(底座)安装方法:
1、卸下帽盖、手柄,再将将帽盖旋上支持件(防止支持件螺纹受损)。
2、将密封圈套于支持件相应槽内,将支持件小端穿入箱体相应孔(用户根据箱体设计绝缘支架及附件,
绝缘支架先行安装,以支撑支持件),支持件上四孔与螺栓相对应,旋紧四固定螺母。
3、移动两可调绝缘契块到契块斜面与支持件面接触,旋紧契块固定螺栓。
4、收紧绝缘扎带(或采用Φ4-Φ5U型金属线材)将支持件与绝缘支架固定,以防支持件受力损伤。

◆Type instruction
◆Order number
Rated current Fuse-link Order number Fuse-base Order number
6.3 ZGR5-6.3  
8 ZGR5-8  
10 ZGR5-10 ZGR5-D
12.5 ZGR5-12.5  
16 ZGR5-16  
◆Installation

1、 Fuse-base
Installation of Fuse-base is shown in Fin.4.The size of opening the bore in the Installation panel and the orientation size of four bolts of M8 are shown in Fig,2.The four bolts of M8 are used to fix the base. Seal washer is used to assure seal capabilitly of oil box.
2、 Fuse-link
The fuse-link is fixed in the fuse-carrier,as shown in Fig.5.Solder-covered of fuse-link must shun the four bolts of. Each side of the fuse-link should be inserted into the connecting-cartridge and fixed by a bolt tightly then put it into the fuse-mount.
3. Fuse
The seal washer of O species is fixed on the fuse-mount,as shown in Fig.6.The fuse-link is inserted into fuse-mount. Use a wrench to
tighten casing.




◆General
□ZGR5(XRNT4)-12H.V.current-limiting Back-up fuse for protection of transformer (here-under fuse) is available for H.V.indoor electric
system, with rated voltage 12KV,rated current up to 16A,50Hz a.c..It is used for protecting from overload and short-circuit for power
transformer.
◆Standard
Accord with GB 15166.2 Alternating-current high-voltage fuses Current-limiting fuse
◆Construction

The fuse consist of a fuse-link, a fuse-carrier and a fuse-mount seal washer shield etc. Each side of the fuse-link should be inserted into the connecting-cartridge and fixed by a bolt tightly then put it into the fuse-mount. Add a seal washer and tighten a protecting cover.It is a oil-proof and water-proof fuse.

◆Basic parameters
Rated voltage KV Rated current of the fuse A
12 16
Rated current of the fuse-link Rated shortcircuit b reaking capacity current
6.3、8、10、12.5、16 16
Lightning impulse voltage(Max) Operating condition
对地 断口 Air oil
75 95
◆Installation Dimensios
熔断件的外形尺寸图1
Dimensions of the fuse-link are shown in Fig.1,and Dimensions of the overall and installation of a fuse see Fig.2.

图4底座的安装示意图                   图5                  图6
◆Notice TheTimecurrentCharacteristicOfThe Fuse

1、The upper limit of oil temperature can not exceed 100 when the
fuse is normally used in the dielectric oil of transformer.The fuse’s
capacity must be taken from if the oil temperature exceeds 40.
2、If damaged,the type and main technical data of the replaced fuse-
link must be same completely,not to replace by the other.It is normal
phenomena if fuse-cartridge becomes yellow or dielectric canister
vents inhalators.
3、The fuses in three phase,one of fuses is damaged,the other must be replaced.unless one of廿1em has been known to be breaking operation.
4、The seal washer of O species of waterproof must be replaced
when the new fuse-link is replaced.

熔断器的时间-电流特性曲线