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HR17 Series Fuse Type Isolation Switch
Application
HR17 Series Fuse Type Isolation 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.
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
Structural Features
HR17 Series Fuse Type Isolation 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

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
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.

Outline and Installation Size
Model
A
B
C
D
E
F
G
H
K
L
M
O
P
Q
HR17-160
106
185
90
45
47.5
120
60
155
109
181
103
205
110
17
HR17-250
185
268
120
66
-
196
199
84
199
105
115
294
183
20
HR17-400
253
333
145
80
262
224
92
249
124
131
339
211
25
HR17-630
253
333
145
94.5
-
262
98.5
259
48
127.5
139.5
360
211
28