NHR17 Series Fuse Type Isolating Swirtch |
| Application |
NHR17 Series Fuse Type Isolating Switch is of state of the art in the middle 1990s in the world. Its rated frequency is 50Hz(or 60Hz), rated insulation voltage 800V, rated working voltage up to 690V, and rated working current up to 630A. It can be used in the distribution circuit of high short-circuit current and the motor circuit, serving for power swtich, isolating switch and emergency switch as well as circuit protector. Generally, it cannot be directly used for switching of single motor and shall be used indoors.
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| Normal Working Conditions |
＃The ambient air temperature shall not exceed +40≧. The average value shall not exceed +35≧ within 24 hours. The lower-limit of ambient air temperature is -5≧.
＃The height above sea level for installing the switch shall not exceed 2000m.
＃When at max. temperature of +40≧, relative air humidity shall not exceed 50%. Higher relative humidity such as 90% at the temperature of 20≧, is allowed under lower temperature. Special measure shall be taken against occasional condensation caused by temp. change.
＃The pollution grade of environment for installing switch is 3.
＃The switch shall be vertically installed in the place without vibration or shock. |
| Model and Definition |
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| Structural Features |
| NHR17 Series Fuse Type Isolating Switch is composed of four parts: base(with contact). upper and lower electric shock shields, switch cover(with fuse body). Both mounting base and switch cover are made of plastic and designed with electric shock shield. Therefore, this series switch features compact structure, light weight, reliable operation, safety and easy in installation, and beautiful appearance, etc. |
| Main Technical Data |
Applicable fuse size |
00 |
1 |
2 |
3 |
Power supply frequency |
AC、50Hz |
AC、50Hz |
AC、50Hz |
AC、50Hz |
Rated voltage(V) |
690 |
500 |
400 |
690 |
500 |
400 |
690 |
500 |
400 |
690 |
500 |
400 |
Rated insulation voltage(V) |
800 |
800 |
800 |
800 |
Rated working voltage(A) |
160 |
250 |
400 |
630 |
Conventional closed heating current(A) |
160 |
250 |
400 |
630 |
Using category |
AC-21B(690V) |
AC-21B(690V) |
AC-21B(690V) |
AC-21B(690V) |
AC-22B(500V) |
AC-22B(500V) |
AC-22B(500V) |
AC-22B(500V) |
AC-23B(400V) |
AC-23B(400V) |
AC-23B(400V) |
AC-23B(400V) |
Rated making capacity |
725V、240A |
725V、375A |
725V、600A |
725V、945A |
525V、480A |
525V、750A |
525V、1200A |
525V、1890A |
420V、160A |
420V、250A |
420V、400A
|
420V、6300A |
Rated breaking capacity |
725V、240A |
725V、375A |
725V、600A |
725V、945A |
525V、480A |
525V、750A |
525V、1200A |
525V、1890A |
420V、1280A |
420V、2000A |
420V、3200A |
420V、5040A |
Rated limit short-circuit(kA) |
50 |
100 |
100 |
50 |
100 |
100 |
50 |
100 |
100 |
50 |
100 |
100 |
Curren (W) |
12 |
23 |
34 |
48 |
Application Between Switch and Fuse
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Conventional free air heating current(A) |
Fuse size |
Applicable fuse body current value(A) |
160 |
00 |
4、6、10、16、20、25、32、35、40、50、63、80、100、125、160 |
250 |
1 |
80、100、125、160、200、224、250 |
400 |
2 |
125、160、200、224、250、300、315、355、400 |
630 |
3 |
315、355、400、425、500、630 |
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Note :When the switch is used in the motor circuit, the rated current of fuse is allowed to larger than the raterd working current of switch.
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| Outline and Installation Size |
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Model |
A |
B |
C |
D |
E |
F |
G |
H |
K |
L |
M |
O |
P |
Q |
NHR17-160 |
106 |
185 |
90 |
45 |
47.5 |
120 |
60 |
155 |
109 |
181 |
103 |
205 |
110 |
17 |
NHR17-250 |
185 |
268 |
120 |
66 |
- |
196 |
199 |
84 |
199 |
105 |
115 |
294 |
183 |
20 |
NHR17-400 |
253 |
333 |
145 |
80 |
|
262 |
224 |
92 |
249 |
124 |
131 |
339 |
211 |
25 |
NHR17-630 |
253 |
333 |
145 |
94.5 |
- |
262 |
98.5 |
259 |
48 |
127.5 |
139.5 |
360 |
211 |
28 |
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