www.lsis.

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Prime-MEC

LS HRC Power Fuses

Current without
Power Fuse
(40kA ms)

Ipeak
Let through current

e
ycl
C
.5
w0
o
l
Be

Rated voltage(kV)
Initiation of
arcing(degree)
Ipeak(kA)

3.6

7.2

56

85

90

45

6.5

7.2

7.3

5.2

Power Factor
Test current : 40kA
Basis : 63A
I peak : Let through current(under the short circuit test)

24

70

89

47

85

85

6.0

7.3

5.1

7.2

7.2

0.07 ~ 0.15

Features
The LS HRC Power Fuses belong to the PRIME MEC series.
It interrupts high currents before the first loop of fault
current has reached its natural peak value and therefore cuts
down the required withstand capacity of the associated
equipment on the electric system.
Though small in size, it has a high breaking capacity and
its enclosed type is suitable for use inside of the panel board.
PRIME MEC fuses are equipped with striker pins for trip
indicators as well as for operating the related load break switches.
Link type fuse holder enables easy maintenance and high stability when replacing the fuses.
With Fuse Checker, checking the conditions of a fuse in the panel board or by telecommunication is possible.(Optional)

Applied standards
IEC 60282-1, DIN 43625, BS 2692, KSC 4612

Applications
Transformer protection
- To protect against short circuit current in the secondary part of
a transformer and fault current in the transformer circuit.

Condenser protection
- To protect against fault current in the condenser circuit.

Motor protection
- To protect against fault current in the motor circuit

Cable protection
- Fault current protection secures the cable

LS HRC Power Fuses

Ratings

Fuse link
Type
LFL-3/6G-5B
LFL-3/6G-10B
LFL-3/6G-20B
LFL-3/6G-30B
LFL-3/6G-40B
LFL-3/6G-50B
LFL-3/6G-60B
LFL-3/6G-75B
LFL-3/6G-100B
LFL-3/6G-125B
LFL-3G-160B
LFL-3G-200B
LFL-6G-160B
LFL-6G-200B
LFL-20G-5B
LFL-20G-10B
LFL-20G-16B
LFL-20G-20B
LFL-20G-25B
LFL-20G-30B
LFL-20G-40B
LFL-20G-50B
LFL-20G-60B
LFL-20G-75C
LFL-20G-100C
LFL-20G-125B
LFL-20G-160B
LFL-20G-200B

Rated
voltage
(kV)

3.6/7.2

3.6
7.2

24

Rated
current
(A)
5
10
20
30
40
50
63
75
100
125
160
200
160
200
5
10
16
20
25
30
40
50
63
75
100
125
160
200

Fuse holder

Dimensions Weight
(kg)
A
B

192

55

Minimum
breaking
current (A)

Type

Rated
voltage
(kV)

192

77

292

77

2.8

442

55

40

442

77

4.2

442

87

5.1

87

Insulation
level
(BIL, kV)

100

5.5

5In

7.2

5In
LFH-20G-D2HB

25

60

200

LFH-6G-D2HB

40

537

Rated
current
(A)

1
LFH-6G-D1HB

Note) 1. Application site : Indoor use.

2. Refer to the column "B" in the table for inside diameters of Hook rings.
3.
Models highlighted can be applied to 3.6 or 7.2kV.

Breaking
current
(kA, rms)

6In
LFH-20G-D2HC

24

200

125

Conditions of selection

Basic conditions for selecting the Power Fuses

The rated current of a Power Fuse should be higher than sum of the total rated current of the electric equipment on the circuit.
Back-up protection with electric equipment on the circuit.
- Set the operating characteristics of the Power Fuses to satisfy the over-current characteristics of the protected loads on the circuit.
Also, set the occurred calories, by the l2t operation, to be smaller than the short-circuit intensity of the electric equipment and circuit.
- When using the Power Fuses for backup usage with other protective equipment, set the operating times of the protective equipment
below the minimum breaking current to be faster than those of the Power Fuses.

For transformer protection

Phase

Circuit
voltage
(kV)

Transformer
capacity
(kVA)

Applied fuses

4~8
6~13
15~31
-

3.3

LFL-3/6G-5B

8~16

LFL-3/6G-5B

LFL-3/6G-10B

13~25

LFL-3/6G-10B

LFL-3/6G-20B

30~62

Circuit
voltage
(kV)

LFL-3/6G-20B
-

Transformer
capacity
(kVA)

Applied fuses

20~43

LFL-20G-5B

43~90

LFL-20G-10B

87~180

LFL-20G-16B

99~206

LFL-20G-20B

130~269

LFL-20G-25B

LFL-3/6G-30B

40~84

LFL-3/6G-30B

149~310

LFL-20G-30B

LFL-3/6G-40B

80~165

LFL-3/6G-40B

267~557

LFL-20G-40B

49~102

LFL-3/6G-50B

98~204

LFL-3/6G-50B

345~719

LFL-20G-50B

66~137

LFL-3/6G-60B

132~275

LFL-3/6G-60B

430~897

LFL-20G-60B

6.6

22.9

68~165

LFL-3/6G-75B

134~330

LFL-3/6G-75B

580~1145

LFL-20G-75B

128~220

LFL-3/6G-100B

256~440

LFL-3/6G-100B

923~1527

LFL-20G-100B

151~275

LFL-3/6G-125B

302~550

LFL-3/6G-125B

1364~1908

LFL-20G-125B

211~352

LFL-3/6G-160B

425~704

LFL-3/6G-160B

2125~2443

LFL-20G-160B

265~4402

LFL-3/6G-200B

437~880

LFL-3/6G-200B

2650~3050

LFL-20G-200B

6.7~14

LFL-3/6G-5B

13~28

LFL-3/6G-5B

36~75

LFL-20G-5B

11~22

LFL-3/6G-10B

21~44

LFL-3/6G-10B

Selecting
conditions

Applied fuses

40~82

25~53

3.3

Transformer
capacity
(kVA)

21~42

Circuit
voltage
(kV)

LFL-3/6G-20B

51~107

LFL-3/6G-20B
-

75~157

LFL-20G-10B

151~313

LFL-20G-16B

172~358

LFL-20G-20B

224~466

LFL-20G-25B

35~73

LFL-3/6G-30B

70~145

LFL-3/6G-30B

258~538

LFL-20G-30B

69~143

LFL-3/6G-40B

137~286

LFL-3/6G-40B

464~965

LFL-20G-40B

85~77

LFL-3/6G-50B

170~354

LFL-3/6G-50B

598~1246

LFL-20G-50B

114~238

LFL-3/6G-60B

229~476

LFL-3/6G-60B

745~1554

LFL-20G-60B

117~285

LFL-3/6G-75B

233~571

LFL-3/6G-75B

1000~1983

LFL-20G-75B

222~381

LFL-3/6G-100B

443~762

LFL-3/6G-100B

1600~2645

LFL-20G-100B

261~476

LFL-3/6G-125B

522~952

LFL-3/6G-125B

2362~3304

LFL-20G-125B

365~610

LFL-3G-160B

735~1220

LFL-6G-160B

3680~4232

LFL-20G-160B

459~762

LFL-3G-200B

755~1520

LFL-6G-200B

4593~5287

LFL-20G-200B

6.6

22.9

The inrush current of a transformer is selected assuming that the current is 10 time that of the full-load transformer current in 0.1sec.
The rated current of the Power Fuses is selected to continuously flow at 1.5time of the transformer rated current.
Power Fuses for protecting against short-circuit in the secondary part of a transformer are selected assuming that the current is 25times that of the transformer rated current in 2seconds.
Note) 1.

Models highlighted can be applied to 3.6 or 7.2kV

LS HRC Power Fuses

Conditions of selection

For condenser protection

Phase

Circuit
voltage
(kV)

Transformer
capacity
(kVA)

Applied fuses

Applied fuses

~19

LFL-3/6G-5B

~46

LFL-20G-5B

19~24

LFL-3/6G-10B

46~83

LFL-20G-10B

LFL-3/6G-20B

24~61

LFL-3/6G-20B

31~46

LFL-3/6G-30B

46~64

LFL-3/6G-40B

64~81

LFL-3/6G-50B

61~92
6.6

LFL-3/6G-30B

92~128

LFL-3/6G-40B

128~163

LFL-3/6G-50B

22.9

64~172

LFL-20G-16B

83~203

LFL-20G-20B

193~272

LFL-20G-25B

203~317

LFL-20G-30B

317~425

LFL-20G-40B

425~564

LFL-20G-50B

81~105

LFL-3/6G-60B

163~210

LFL-3/6G-60B

564~710

LFL-20G-60B

105~150

LFL-3/6G-75B

210~300

LFL-3/6G-75B

710~1021

LFL-20G-75B

150~222

LFL-3/6G-100B

300~445

LFL-3/6G-100B

1021~1655

LFL-20G-100B

222~275

LFL-3/6G-125B

445~550

LFL-3/6G-125B

1655~2370

LFL-20G-125B

275~370

LFL-3G-160B

550~742

LFL-6G-160B

2370~3170

LFL-20G-160B

370~500

LFL-3G-200B

742~1000

LFL-6G-200B

3170~4000

LFL-20G-200B

The inrush current of a condenser is selected to withstand 71time of the condenser rated current in 0.002sec.
The rated current of the Power Fuses is selected to continuously flow at 1.43 times of the condenser rated current.
Note) 1.

Models highlighted can be applied to 3.6 or 7.2kV

For cable protection

Circuit
Circuit
voltage Motor output Applied fuses voltage Motor output Applied fuses
(kV)
(kVA)
(kV)
(kVA)

Selecting
conditions

Condenser
capacity
(kVA)

LFL-3/6G-5B

For motor protection

Phase

Circuit
voltage
(kV)

LFL-3/6G-10B

Selecting
conditions

Applied fuses

~9.8

3.3

Condenser
capacity
(kVA)

9.8~12

12~31

Circuit
voltage
(kV)

3.3

4.3~7.2

LFL-3/6G-5B

8.7~15

LFL-3/6G-5B

7.2~19

LFL-3/6G-10B

15~25

LFL-3/6G-10B

19~39

LFL-3/6G-20B

25~65

LFL-3/6G-20B

34~64

LFL-3/6G-30B

65~88

LFL-3/6G-30B

64~87

LFL-3/6G-40B

88~183

LFL-3/6G-40B

87~109

LFL-3/6G-50B

183~225

LFL-3/6G-50B

106~149

LFL-3/6G-60B

219~304

LFL-3/6G-60B

139~199

LFL-3/6G-75B

288~407

LFL-3/6G-75B

185~288

LFL-3/6G-100B

377~604

LFL-3/6G-100B

229~344

LFL-3/6G-125B

474~721

LFL-3/6G-125B

268~471

LFL-3G-160B

614~1015

LFL-6G-160B

293~518

LFL-3G-200B

958~1502

LFL-6G-200B

6.6

The starting current of a motor is selected to withstand 5 times of the full-loads current in 10sec.
Note) 1.

Models highlighted can be applied to 3.6 or 7.2kV

Cable
diameter
(mm2)

Rated(A)
current of PF
(A)

0.8

40

1.6

50

75

3.5

100

5.5

150

200

22

200

Under the short-circuit condition, the power fuse

breaks the circuit in high speed. Therefore, with
relatively high rated current, the Power Fuse protects
small size cables.
Selected to protect from above 10 times of the shortcircuit current.

Characteristics curves

3.6/7.2kV Cut-off characteristics

3.6/7.2kV Pre-arcing time-current characteristics

1000
800
600

1000
800
600

5A

125A

400

400

10A

100A

200

200

20A

75A

100
80
60

100
80
60

30A

63A

40

125A
100A
75A
10
8
6

63A
50A

40A

20A

30A

10A

1
0.8
0.6

5A

50A

20

Operating time (sec)

20

10
8
6
4
2
1
0.8
0.6

Prospective breaking current(rms : kA)

2000

4000

600
800
1000

200

40

100

20

6
8
10

0.6
0.8
1

0.2

0.4

0.06
0.08
0.1

0.01

0.04

0.02

0.01

400

0.04

0.02

60
80
100

0.04

40

0.2
0.1
0.08
0.06

20

0.2
0.1
0.08
0.06

6
8
10

0.4

0.4

0.02

Cut-off current (peak value:kA)

40

40A

Prospective rated current(rms : A)

3.6kV Cut-off characteristics

3.6kV Pre-arcing time-current characteristics

1000
800
600

1000
800
600

400

400

200A
160A

200

200

100
80
60

100
80
60
40

200A
20

4
2
1
0.8
0.6
0.4

20

Operating time (sec)

160A
10
8
6

10
8
6
4
2
1
0.8
0.6

Prospective breaking current(rms : kA)

2000

4000

600
800
1000

200

400

60
80
100

100

40

20

6
8
10

0.6
0.8
1

0.2

0.4

0.06
0.08
0.1

0.02
0.01

0.04

0.02
0.01

40

0.04

20

0.04

6
8
10

0.1
0.08
0.06

0.2

0.1
0.08
0.06

0.4

0.2

0.02

Cut-off current (peak value:kA)

40

Prospective rated current(rms : A)

LS HRC Power Fuses

Characteristics curves

7.2kV Cut-off characteristics

1000
800
600

1000
800
600

400

400

200

200

100
80
60

100
80
60

40

20

Operating time (sec)

10
8
6
4
2
1
0.8
0.6

200A
160A

40

200A
160A

20

0.4

10
8
6
4
2
1
0.8
0.6

Prospective breaking current(rms : kA)

24kV Cut-off characteristics

6000
8000
10000

2000

4000

600
800
1000

200

400

40

100

20

6
8
10

0.4

0.6
0.8
1

0.2

0.06
0.08
0.1

0.01

0.04

0.02

0.01

60
80
100

0.04

0.02

40

0.04

20

0.1
0.08
0.06

6
8
10

0.2

0.1
0.08
0.06

0.4

0.2

0.02

Cut-off current (peak value:kA)

7.2kV Pre-arcing time-current characteristics

Prospective rated current(rms : A)

24kV Pre-arcing time-current characteristics

1000
800
600
400
200
100
80
60

Cut-off current (peak value:kA)

40

Operating time (sec)

20
10
8
6
4
2
1
0.8
0.6
0.4
0.2
0.1
0.08
0.06
0.04
0.02

Prospective breaking current(rms : kA)

Prospective rated current(rms : A)

4000

6000
8000
10000

2000

400

600
800
1000

200

60
80
100

40

20

6
8
10

0.01

Fuse holder dimensions

Indoor use Power Fuse holder

LFH-6G-D1HB Type
C (Peak height in open condition)
12.5(Hold)

Fuse size(A)

55

242.3

376

77

253.3

380

Hook Ring

Earth hole

Mounting hold

Fuse checker

Indoor use Power Fuse holder

LFH-6G-D2HB Type

456.5 (Peak height in open condition)

Hook Ring
Mounting hole

Below 1

Earth hole

Fuse checker

LS HRC Power Fuses

Fuse holder dimensions

Indoor use Power Fuse holder

LFH20-D2HB(C) Type
C (Peak height in open condition)

Hook Ring
Mounting hold

Fuse size(A)

55

362.3

687.5

77

373.3

691.6

87

378.3

695(768)

Note) Dimension in (

) is for LFH-20G-D2HC

Below 1

Earth hole

Fuse checker

Power Fuse holder

Panel

Conductor

Panel

D: Minimum insulation
distance in opening
E: Minimum insulation
distance in closing

PH Holder type

Rated
voltage
(kV)

Rated
current
(A)

LFH-6G-D1HB

7.2

100

LFH-6G-D2HB

7.2

200

24

200

LFH-20G-D2HB
LFH-6G-D2HB

10

Circuit
voltage
(kV)
3.3
3.3
6.6
6.6
3.3
6.6

Insulation
level
(BIL, kV)
45
45
60
60
45
60

22.9

125

Dimensions(mm)
A
421
421
421
421
521
521
671
671
671
766

B
250
254
250
254
254
254
363
374
379
379

C
376
380
376
380
457
457
688
692
695
768

D
323
334
349
360
334
360
586
597
602
602

E
477
477
503
503
564
590
934
957
957
957

Applied fuse
F
97
97
123
123
97
123
-

G
130
130
158
158
130
158
260
260
260
260

LFL-3/6G-5B, 10B, 20B, 30B, 40B, 50B

LFL-3/6G-60B, 75B, 100B
LFL-3/6G-5B, 10B, 20B, 30B, 40B, 50B
LFL-3/6G-60B, 75B, 100B
LFL-3/6G-125B, LFL-3G-160B, 200B
LFL-3/6G-125B, LFL-6G-160B, 200B
LFL-20G-5B, 10B, 16B, 20B
LFL-20G-25B, 30B, 40B, 50B, 60B
LFL-20G-75C, 100C 125B, 160B
LFL-20G-200B

Striker operating characteristics & Ordering information

Striker operating characteristics

Operating characteristics of the Power Fuses

Operating weight (kgf)

The characteristics of the Power Fuses are native and fixed.

Therefore it can not be regulated like a circuit breaker or over-load
relay. When ordering, please select the Power Fuses with proper
current and operating characteristics by considering its usage and
circuit condition.

Breaking a small current.

Power Fuses are not adequate to protect small current. So, the
manufacturer specifies and guarantees the minimum breaking current by
regulation.
1) Select the rated current of the Power Fuse, which does not operate
below the minimum breaking current.
2) Protect the current below the minimum value by use of other protective
equipment.
Operating distance(mm)

Types of P/F Link & P/F Holder

P/F Link

Rated voltage

General use

LFL
Model name

50

Rated current

Revision No.

3.6/7.2kV

5A

50

50A

3.6kV

10

10A

60

63A

7.2kV

16

16A

75

75A

20

24kV

20

20A

100

100A

25

25A

125

125A

30

30A

160

160A

40

40A

200

200A

3/6

P/F Holder

LFH
Model name

Rated voltage

General use

Indoor use

1H

Revision No.

Rated current

Hook ring

55

200A(24kV)

77

87

Fuse checker

3/6

3.6/7.2kV

1H

100A

Without

20

24kV

2H

200A

with

11

 For your safety, please read user's manual thoroughly before operating.
Contact the nearest authorized service facility for examination, repair, or adjustment.
Please contact a qualified service technician when you need maintenance.
Do not disassemble or repair by yourself!

Safety Instructions

Any maintenance and inspection shall be performed by the personnel having expertise concerned.

2009.2 LSIS Co.,Ltd. All rights reserved.

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Beijing, China
Address: B-Tower 17FL.Beijing Global Trade Center B/D. No.36, BeiSanHuanDong-Lu, DongCheng-District,
Beijing 100013, P.R. China
Tel: 86-10-5825-6025,7 Fax: 86-10-5825-6026 e-mail: sunmj@lsis.com.cn

LSIS Guangzhou Office

Guangzhou, China
Address: Room 1403, 14/F, New Poly Tower, No.2 Zhongshan Liu Road, Guangzhou 510180, P.R. China
Tel: 020-8326-6754 Fax: 020-8326-6287 e-mail: chenxs@lsis.com.cn

LSIS Chengdu Office

Chengdu, China
Address: Room 1701 17Floor, huamin hanjun internationnal Building, No1 Fuxing Road Chengdu, 610016, P.R. China
Tel: 86-28-8670-3201 Fax: 86-28-8670-3203 e-mail: yangcf@lsis.com.cn

LSIS Qingdao Office

Qingdao, China
Address: Room 2001,20/F,7B40, Galaxy Building, No.29 Shandong Road, Shinan District, Qingdao 266071, P.R. China
Tel: 86-532-8501-6058 Fax: 86-532-8501-6057 e-mail: wangzy@lsis.com.cn

LSIS NETHERLANDS Co.Ltd

Schiphol-Rijk, Netherlands
Address: 1st. Floor, Tupolevlaan 48, 1119NZ,Schiphol-Rijk, The Netherlands
Tel: 31-20-654-1420 Fax: 31-20-654-1429 e-mail: junshickp@lsis.biz

Specifications in this catalog are subject to change without notice due to

continuous product development and improvement.

2012. 11

LSIS Gurgaon Office

Gurgaon ,India
Address: 109 First Floor, Park Central, Sector-30, Gurgaon- 122 002, Haryana, India e-mail: hwyim@lsis.biz

LS HRC Power Fuses (E) 2009. 02/(02) 2012. 11 Printed in Korea STAFF