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RN1、RN2、RN3 Type indoorhigh-voltage limit-current fuse,fusing performance
Categories:High Series   

□The product is in overload or short-circuit protection for elctric transformer. The current limiting means that the fuse will cut off the circuit before the shortcircuit current reaches the peak value.


◆熔断特性
Current which passes the fuse when being 1.3 times of its specified electric current, Do not fusing for an hour; When the current through the fuse is 2 times of its specined electric current, fusing in an hour; Refer to its fusing feature curve in chart 1 when select the fuse.
◆ Technique data
  3 6 10 35
额定电流 A 20 100 200 300 400 20 75 100 200 300 20 50 75 100 200 7.5 10 20 30 40
Max breaking curent KV effective vakue 40 20 12 3.5
The mininum breaking current Express
with specified electric current multipe
nuprovide 1.3 nuprovide 1.3 nuprovide 1.3 不规定
nuprovide
1.3
三相最大断流容量(MVA) 200
Weight 8 8.9 10.8 15.7 15.7 8.5 9.6 13.6 13.6 17 10 11.5 14.5 21 21 10 20 27 27 27

◆ Structure of fuse link

The fuse pipe is the main part of fuse,it is made by installing the fuse wire in the porcelain pipe,filling the quartz sand in the porcelain pipe and sealing to-ends of pipe.For the fuse pipe with rated current below 7.5Aand 35V rated voltage,its fuse wire is rolled on the special por-
celain core,referening to chart 2.a.for the fuse pipe with rated current above 7.5A,its fuse wire is hang in the porcelain pipe,referening to the chart.

◆ Installation Dimensios

Chart 2-the section of Rn1and Rn2 sty le fuse pipe

Chart 2-the section of Rn 1and Rn2 style fuse pipe
□1. Cover       □6. Indicator fuse wire
□2. Cap        □7. Spring       
□3. Porce lain pipe  □8. Indicator
□4. Fuse wire     □9. Porcelain core
□5. Quartz sand   □10. Rubber washer
Product type Product code number Diagram number Rated voltage RaFuse current A Main sizemin
A a L H1 H b
RN1-3/2 RN3 图3 3 2 220 400 450 125 235 108
RN1-3/3 RN3 3
RN1-3/5 RN3 5
RN1-3/7.5 RN3 7.5
RN1-3/10 RN3 10
RN1-3/15 RN3 15
RN1-3/20 RN3 20
RN1-6/2 RN3 6 2 320 500 550
RN1-6/3 RN3 3
RN1-6/5 RN3 5
RN1-6/7.5 RN3 7.5
RN1-6/10 RN3 10
RN1-6/15 RN3 15
RN1-6/20 RN3 20
RN1-10/2 RN3 10 2 420 600 650
RN1-10/3 RN3 3
RN1-10/5 RN3 5
RN1-10/7.5 RN3 7.5
RN1-10/10 RN3 10
RN1-10/15 RN3 15
RN1-10/20 RN3 20



图4 RN1-35/2.40,RN2-35,RN3-35型外形尺寸            图5 RN1-3/30-100,RN1-30-75,RN1-10/30-250型外形尺寸

Product type Product code number Diagram number Rated voltage RaFuse current A Main sizemin
A a L h2 H b
RN1-3/30 RN3 图5 3 30 216 400 450 155 235 108
RN1-3/40 RN3 40
RN1-3/50 RN3 50
RN1-3/75 RN3 75 266 288
RN1-6/100 RN3 100
RN1-6/30 RN3 6 30 316 500 550 235
RN1-6/40 RN3 40
RN1-6/50 RN3 50
RN1-6/75 RN3 75 366 288
RN1-10/30   10 30 416 600 650 235
RN1-10/40   40
RN1-10/50   50

图6
Product type Product code number Diagram number Rated voltage RaFuse current A Main sizemin
A a L H b
RN1-3/150 RN3 图6 3 150 270 400 450 350 108
RN1-3/200 RN3 200
RN1-6/100 RN3 6 100 370 500 550
RN1-6/150 RN3 150
RN1-6/200 RN3 200
RN1-10/75 RN3 10 75 470 600 650
RN1-10/100 RN3 100
图7
Product type Product code number Diagram number Rated voltage RaFuse current A Main sizemin
A a L b
RN1-3/300 RN3 图7 3 300 270 400 450 108
RN1-3/400 RN3 3 400
RN1-6/300 RN3 6 300 370 500 550
RN1-6/150 RN3 10 150 470 600 650
RN1-6/200 RN3 10 200



□The product is used in overload or short-circuit protection for instrument transformer.At the time of holding up by restrain circuit current way to get minimum from carry on instantaneous to turn on and break,it should be within the range of 0.6-1.8A to fuse the electric current in one minute.

◆Technique data
Product type RN2-3、6、10 RN215、20 RN2-35
Rated voltage KV 3 6 10 15 20 35
Fuse current A 0.5     0.5
Capacity of largest break of three-phase MVA 500 100 1000 1000
Max break curent KA effective value KA 100 85 50 40 30 17
Overvoltage multiple Do not exceed Do not exceed voltage of 2.5 times of rating
Resistance of the fuse pipe(Ω) 93±7 200±10 315±14
Weight Kg 5.6 12.2 15.6
Fuse weight Kg 0.9 1.6 2.5

◆Installation Dimensios

图8 RN2-3、6、10/0.5型外形尺寸         图8 RN2-15、20/0.5型外形尺寸          图8 RN2-35/0.5型外形尺寸


The fuse flows in high voltage limt in RN3 type one(RN1)
1.Meltiing body adopt slice become section fracture structure more is for make and turn on and give up abiltiy streng then,open and break accelerating, can set up rapidly to bring up the rear insulatingl while openning. AssauIt ability and was improved after opposing the voltage.
2.RN 3 type serial high-voltage Iine the fuse flows.For enabIe them be abIe to cope rate with Fn5 on-Icad switch and work.Have perfected the basic function of pointing out.Should point for to trip in the organiz-ation on-load switch.
3.From nationaI standard d raft GBl5166.The experimental methods of”Iimit flowina type device fuse box”for 1-5-94. can make the capacity of short circuit of breaking 20-1 50MVA.and Rn1 type can only make the capacity of short circuit of breaking 40-80MVA. Rn3 type can cooperated with Fn 5 and opened and broken the ilectric curtent in year. RNl type. can’t triP
4.Workinq temperature of fuse box reduce,rated current of the fuse has been ine reased,See the pattern concretly.

图3 RN3-3,6,1 0/2-0.5型外形尺寸                 图3 RN3-3/75-200,RN1-6/75-200,RN3-10/75-200型外形尺寸