Huanyu HR3 Series Owner's manual

- 1 -
HR3 Series
Fuse Knife Switch
Installation and Operation
Instruction
Before installing and using the product,
please read the instruction carefully
and well keep it for future reference.
Product Certificate
This product has passed the inspection and meets the
requirements of GB/T14048.3, and therefore is allowed to leave
the factory.
Inspector:
Date of inspection: See the product or packaging.
HUANYU HIGH-TECH CO., LTD.
Inspection

- 1 -
HR3 Series Fuse Knife Switch
I. Scope of Application
The HR3 Series Fuse Knife Switch (hereinafter referred to as “switch”) is
suitable for industrial and commercial power distribution systems with AC 50
Hz, rated voltage of 380 V and conventional thermal current up to 1,000 A,
and is used for the overload and short-circuit protection of cables, conductors
and electrical equipment. Under normal circumstances, the circuit can be
manually switched on and off infrequently. In the case of short circuit, the
fuse is blown to cut off the current.
With simple structure and convenient operation, the switch complies with
GB/T14048.3 and IEC60947-3, and is the most ideal combined electrical
appliance used to replace the knife switch and fuse in various low-voltage
distribution devices.
II. Normal Working Conditions
1. Ambient air temperature: The temperature shall not be higher than
+40°C and lower than -5°C, and the average value within 24 hours shall
not exceed +35°C.
2. Altitude: The altitude of the installation location shall not exceed 2,000
meters.
3. Relative humidity: The relative atmospheric humidity shall not exceed
50% when the maximum ambient temperature is +40°C, and a higher
relative humidity is allowed at a lower temperature (for example: 90%
humidity at +20°C), but the occasional condensation on the switch
surface due to temperature changes shall be considered.
4. Contamination grade of the surrounding environment: Grade 3.
5. Installation category: III.
6. Installation conditions: The switch shall be installed vertically in a place
without significant shaking, impact or vibration and in a medium without
explosion risks, or enough gas or dust to corrode metals or destroy the
insulation.
7. Please consult with our company for the use occasions under abnormal
working conditions.

- 2 -
III. Model Description
2: Front central lever transmission mechanism type,
rear maintenance
3: Side handle type, front maintenance
4: No-panel front side square lever transmission
mechanism type, front maintenance
Number of poles: 3 poles
Conventional thermal current
Design code
Fuse knife switch
IV. Structural Features of Switch
The fuse knife switch is a combination of the fuse and the knife switch, which
has the basic performance of fuse and knife switch. Under the condition of
normal power supply of the circuit, the knife switch is used to turn on and off
the circuit. When the line or equipment is overloaded or short-circuited, the
fuse is blown to cut off the fault current.
The switch has three operation modes and maintenance directions, which is
suitable for the installation and use of various low-voltage switchgears and
distribution cabinets.
1). Front central lever transmission mechanism type, rear maintenance
2). Side handle type, front maintenance
3). No-panel front side square lever transmission mechanism type, front
maintenance
Among them, the switch for front operation andfront maintenance has a door
in the center for the maintenance and replacement of fuse, which is mainly
used for the installation on the BDL distribution panel. The switch for front
operation and rear maintenance is mainly usedfor the installation on the BSL
distribution cabinet. The switch for side operation and front maintenance can
be used for the closed power distribution cabinet.
The switch is equipped with a safety baffleand anarc extinguishing chamber,
which is riveted by phenol-formaldehyde laminated cardboard and metal arc
extinguishing grid, greatly enhancing the arc extinguishing ability of the
switch.

- 3 -
The fuse of the switch is fixed on the insulating beam with spring and lock
plate, which ensures that the fuse does not trip during the normal operation,
and when the fuse link is blown due to fault, the fuse can be easily replaced
by pressing the lock plate.
V. Main Technical Parameters
1. Main technical parameters of the switch:
HR3
-100
-200
-400
-600
-1000
Rated impulse withstand
voltage Uimp
8kV
Rated insulation voltage Ui
690V
Rated working voltage Ue
AC380V
Rated frequency
50Hz
Use category
AC-22B
Conventional thermal
current Ith
100A
200A
400A
600A
1000A
Rated working current Ie
30-100A
100-200A
200-400A
400-600A
600-1000A
Rated limited short-circuit
current (r.m.s)
50kA
50kA
50kA
50kA
50kA
Mechanical life (number of
operation cycles)
3500
3500
2000
2000
1250
Electrical life (number of
making/breaking cycles)
500
500
500
500
250
Operating force F
≤294N
≤294N
≤294N
≤294N
≤400N
2. Matching between the switch and the fuse link:
Conventional thermal
current Ith
Specification of fuse link
matched
Rated current of fuse link (A)
100A
RT0-100
30. 40. 50. 60. 80. 100
200A
RT0-200
100. 120. 150. 200
400A
RT0-400
200. 250. 300. 350. 400
600A
RT0-600
400. 450. 500. 550. 600
1000A
RT0-1000
600. 800.1000

- 4 -
VI. Outline and Installation Dimensions of Switch
1. Outline and installation dimensions of HR3-100~1000/32
HR3
Outline dimensions
(mm)
Installation
dimensions (mm)
Copper busbar dimensions (mm)
A
B
C
F*
a
b
Øc
k
D
E
Y
S
W
Copper
cross-
section
M
-100/32
250
192
185
250
215
130
7
12
60
170
47
10
30
2*20
M8
-200/32
270
192
185
250
235
130
7
12
70
156
45.5
12.5
28
2*30
M10
-400/32
290
215
185
250
255
130
7
12
80
184
45.5
14
35
2.5*35
M10
-600/32
320
229
185
250
285
130
9
12
90
191
49.5
17.5
40
3.5*40
M12
-
1000/32
410
335
270
350
350
250
9
12
115
300
69
12.5
55
8*50
2-M10
Note: The F* dimensions are those when the connecting rod is in the
maximum position after the switch is turned on.
(Nameplate)
(Handle)
Opening drawing

- 5 -
2. Outline and installation dimensions of HR3-100~1000/33
HR3
Outline dimensions
(mm)
Installation
dimensions (mm)
Copper busbar dimensions (mm)
A
B
C
F*
a
b
Øc
h
D
E
Y
S
W
Copper
cross-
section
M
-100/33
250
200
185
75
215
160
7
78
60
170
47
10
30
2*20
M8
-200/33
270
202
185
75
235
160
7
78
70
156
45.5
12.5
28
2*30
M10
-400/33
290
215
185
75
255
160
7
78
80
184
45.5
15
35
2.5*35
M10
-600/33
320
229
185
75
285
160
9
78
90
191
49.5
17.5
40
3.5*40
M12
-
1000/33
410
335
270
75
350
250
9
102
115
300
69
12.5
55
8*50
2-M10
Note: The F* dimensions are those when the connecting rod is in the
maximum position after the switch is turned on.
(Nameplate)
(Handle)
Opening drawing

- 6 -
3. Outline and installation dimensions of HR3-100~1000/34
HR3
Outline dimensions
(mm)
Installation dimensions
(mm)
Copper busbar dimensions (mm)
A
B
C
F*
a
b
Øc
h
k
D
E
Y
S
W
Copper
cross-
section
M
-100/34
250
200
250
75
215
160
7
48
12
60
170
47
10
30
2*20
M8
-200/34
270
202
250
75
235
160
7
48
12
70
156
45.5
12.5
28
2*30
M10
-400/34
290
215
250
75
255
160
7
48
12
80
184
45.5
14
35
2.5*35
M10
-600/34
320
229
250
75
285
160
9
48
12
90
191
49.5
17.5
40
3.5*40
M12
-
1000/34
410
335
350
75
350
250
9
70
12
115
300
69
12.5
55
8*50
2-M10
Note: The F* dimensions are those when the connecting rod is in the
maximum position after the switch is turned on.
(Nameplate)
(Handle)
Opening drawing

- 7 -
4. Installation and opening dimensions of the HR3/BX Handle
Dimensions between the handle and the switch center
Right
deviated
Downward
deviated
HR3/BX
30
40

- 8 -
VII. Use and Maintenance
1. The switch shall be installed vertically, and the rated current of the
switch and the fuse shall be selected according to the capacity of the
electrical equipment.
2. The switch shall be equipped with RT0 filler cartridge fuse, and meet the
requirements of GB/T 13539.1 and GB/T 13539.2.
3. During the normal operation, the fuse indicator shall be checked
frequently to prevent the single-phase operation of the motor caused by
one-phase fuse. When there is a fault in multi-circuit power distribution
equipment, the fuse indicator shall be checkedfirst, and the faulty circuit
shall be found out in time, and then the fuse shall be replaced to quickly
restore power supply.
4. When replacing the fuse, you shall disconnect the load circuit and wear
working gloves to avoid scalding your hands by the fuse pipe due to the
heat. After pressing the lock plate, the fuse can be easily replaced.
5. The contacts of the switch shall be checked regularly, and the dust, oil
and other impurities shall be cleaned up in time. The groove guide rail
of the switch must be kept clean to prevent ineffective operation due to
fouling.
6. No.3 sodium-based lubricant shall be coated on the contact surface of
the contact knife and socket when the fuse is self-equipped or replaced.
VIII. Ordering Information
When ordering, please specify the model and specification of the switch,
rated current of the fuse link and order quantity. If the rated current of the
fuse link is not specified, it shall be configured according to the conventional
thermal current of the switch. If the fuse link is self-equipped, a remark shall
be provided.
Examples of ordering: HR3-100/32, with 80 A fuse link, 10 sets
HR3-200/34, with self-equipped fuse link, 20 sets

Address: Wenzhou Bridge Industrial
Zone, Yueqing City, Zhejiang Province
Tel.: [phone]
Fax: [phone]
Service hotline: [phone]
http://www.huyu.com.cn
Company Commitment
On the premise that users abide by the use and storage conditions and that
the product seals are intact, if the product is damaged or cannot be used
normally due to manufacturing quality problems within 18 months from the
production date of the product, our company will be responsible for the
repairing or replacement free of charge. If the warranty period expires, users
shall pay for the repair. However, if the damage is caused by the following
circumstances, the fees for repair still shall be charged even within the
warranty period:
(1) Misuse, self-modification, improper maintenance, etc.
(2) Use beyond the standard specification requirements.
(3) Falling, damage during transportation, etc. after purchase.
(4) Earthquake, fire, lightning strike, abnormal voltage, other natural
disasters and secondary disasters, etc.
In case of any questions, please contact the dealer or our customer
service department.
Dear customers
To protect our environment, please recycle the product or its components
when the product is scrapped. For materials that cannot be recycled, please
handle them properly. Thank you very much for your cooperation and
support.