H.V.HRC.current-limiting fuses type W for motor protection |
| H.V.HRC.current-limiting fuses type W for motor protection |
H.V.HRC Current-limiting Fuese Type W is designed for protection of motors or other power equipments working under a voltage of 3.6,7.2kV,50Hz,and with a rated current up to 224A fro moverloading or shortcircut.it can also be used withloading switch,vacuum contact.
It conforms to IEC282-1,GB15166.2 and .BS.standard. |
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| Basic Data |
Rated voltage (kV) |
Department |
Models Foreign |
Rated current of the fuse links(A) |
Rated breaking current (kA) |
Dimensions(mm)(mm) Fig.8.3-8.4 |
Weight(kg) |
¦ÕD |
L |
| 3.6 |
XRNM1 |
WDF.O |
50,63,80,100,125 |
50 |
51 |
254 |
1.4 |
| 3.6 |
XRNM1 |
WFF.O |
125,160,200 |
50 |
76 |
254 |
2.8 |
| 3.6 |
XRNM1 |
WKF.O |
250,315,355,400 |
50 |
76 |
254 |
2.8 |
| 7.2 |
XRNM1 |
WFN.O |
25,31.5,40,50,63,80,100,125,160 |
40 |
76 |
403 |
4.15 |
| 7.2 |
XRNM1 |
WKN.O |
200,224 |
40 |
76 |
403 |
4.15 |
| 10 |
XRNM1 |
|
25,31.5,40,50,63,80,100,125,160,200,224 |
40 |
76 |
600 |
5.26 |
|
Note:Under stipulated condition,min.breaking current of fuses could be as highas 2.5¡«3.0 tims than tated current.
7.2KV fuse link of 224A or above have a dual-tube body
3.6KV fuse link of 400A or above have a dual-tube body |
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| Dimension drawing |
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| Dimension of motor protection fuse type W for busbar installation(mm) |
Model |
Dimensions(mm) |
A |
B |
C |
G |
E |
F |
WFF.O |
390 |
312 |
340 |
140 |
246 |
209 |
WKF.O |
390 |
312 |
340 |
140 |
246 |
209 |
WFN.O |
500 |
461 |
150 |
160 |
266 |
358 |
WKN.O |
500 |
461 |
150 |
160 |
266 |
358 |
XRNM1 |
690 |
659 |
350 |
160 |
266 |
555 |
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| Selection for W type motor current-limit fuse box |
When started with full voltage,Rated current ¡Ötwice of loaded motor current;When started under other curcumstances,rated current¡Ö1.25 times of loaded motor current.For directly started motor,fuses of proper rated currentshould be selected according to the following formula;
Iy£½N¡¤In¡¤¦µ
Iy¡ªstarting current
N¡ªRatio of starting current and loaded current,usually N¡Ö6
In¡ªloaded motor current
¦µ¡ªcomprehensive coefficient,see the table below;
| ¦µ Comprehensive coefficient |
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| Start times |
2 |
4 |
8 |
16 |
| ¦µ |
1.7 |
1.9 |
2.1 |
2.3 |
Refer to Time-current Characteristics Diagram for Selection of proper H.V. fuse link, Rated current of fuse link should be 1.3 times than loaded motor current. |
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