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HR17 series fuse type lsolating switch
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Application
HR17 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 switch, 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
1.The ambient air temperature shall not exceed +40ˇć. The average value shall not exceed +35ˇć within 24 hours. The lower-limit of ambient air temperature is -5ˇć.
2.The height above sea level for installing the switch shall not exceed 2000m.
3.When at max. temperature of +40ˇć, relative air humidity shall not exceed 50%. Higher relative humidity such as 90% at the temperature of 20ˇć, is allowed under lower temperature. Special measure shall be taken against occasional condensation caused by temp change.
4.The pollution grade of environment for installing switch is 3.
5.The switch shall be vertically installed in the place without vibration or shock.

Structural Features
HR17Series Fuse Type Isolating Switch is composed of four parts: base(with contact). upper and lower electric shock shields, switch cover (wirh 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.

Technical Data

Applicable fuse size 00 1 2 3
Power supply frequency AC 50Hz AC 50Hz AC 50Hz AC 50Hz
Rated voltageˇˇ( V ) 690 500 400 690 500 400 690 500 400 690 500 400
Rated insulation voltage 800 800 800 800
Rated working voltage( V ) 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 1600 420V 2500A 420V 4000A 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 50 100 100 50 100 100 50 100 100 50 100 100
Currentˇˇ( KA ) 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 rated working current of switch.
Outline and Installation Size
  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

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