LG HRC Power Fuses ISO 900 ISO
Current without Power Fuse (ka ms) Ipeak Let through Below 0.5 Cycle voltage(kv) Initiation of 3. 7. 5.5 3 arcing(degree) Ipeak(kA) Power Factor 5 5 90 5 70 9 0 7 7 7 5 5 5 5 90.5 7. 7.3 5..0 7.3 5. 7. 7. 5.3. 7.3 5. 7. 7. 5. 7. 7.3 0.07 ~ 0.5 Test : ka Basis : 3A I peak : Let through (under the short circuit test)
Contents Introduction Ratings and specifications Conditions of selection Characteristics curves Fuse holder dimensions Ordering information
LG HRC Power Fuses Introduction Features The LG HRC Power Fuses belong to the PRIME MEC series. It interrupts high s before the first loop of fault 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 -, DIN 35, BS 9, KSC Applications Transformer protection - To protect against short circuit in the secondary part of a transformer and fault in the transformer circuit. Condenser protection - To protect against fault in the condenser circuit. Motor protection - To protect against fault in the motor circuit Cable protection - Fault protection secures the cable Ratings and specification Type LFL-3G-5B LFL-3G-B LFL-3G-B LFL-3G-30B LFL-3G-B LFL-3G-50B LFL-3G-0B LFL-3G-75B LFL-3G-B LFL-3G-5B LFL-3G-0B LFL-3G-0B voltage (kv) 3. (A) 5 30 50 3 75 5 0 0 Fuse link Breaking (ka, rms) Minimum breaking (A) 3~In In: Dimensions (A) (B) (mm) 9 9 55 77 Weight (kg).0.0. Type LFL-G- DHB LFL-G- DHB Fuse holder voltage (kv) 7. (A) 0 Insulation level (BIL, kv) 5 3
Type LFL-G-5B LFL-G-B LFL-G-B LFL-G-30B LFL-G-B LFL-G-50B LFL-G-0B LFL-G-75B LFL-G-B LFL-G-5B LFL-G-0B LFL-G-0B LFL-G-5B LFL-G-B LFL-G-B LFL-G-30B LFL-G-B LFL-G-50B LFL-G-0B LFL-G-75B LFL-G-B LFL-G-5B LFL-G-0B LFL-G-0B LFL-5G-5B LFL-5G-B LFL-5G-B LFL-5G-30B LFL-5G-B LFL-5G-50B LFL-5G-0B LFL-5G-75B LFL-5G-B LFL-G-5B LFL-G-B LFL-G-B LFL-G-30B LFL-G-B LFL-G-50B LFL-G-0B LFL-G-75B LFL-0G-B LFL-G-75B LFL-0G-B LFL-G-5B LFL-G-0B LFL-G-0B LFL-30G-5B LFL-30G-B LFL-30G-B LFL-30G-30B LFL-30G-B LFL-30G-50B LFL-30G-0B (A) 5 30 50 3 75 5 0 0 5 30 50 3 75 5 0 0 5 30 50 3 75 5 30 50 3 75 75 5 0 0 5 30 50 3 Ratings Application site : Indoor use For fuse link & fuse holder type, refer to page 5. voltage (kv) 7. 5.5 3 Breaking (ka, rms) 50 5 Minimum breaking (A) 3~In In: 3~In 3~In 3~In 3~In Dimensions (A) (B) (mm) 55 9 77 9 9 55 77 55 9 77 55 77 537 77 7 55 537 77 Weight (kg).0.0..3...3...0. 5. 5.. 5. Type LFL-G-DHB LFL-G-DHB LFL-G- DHB LFL-G- DHB LFL-5G- D0B LFL-5G- DHB LFL-G- DHB LFL-G- DHB LFL-G- DHB LFL-30G- DHB voltage (kv) 7. 5 3 (A) 0 0 3 0 0 3 Insulation level (BIL, kv) 0 75 5 70 Fuse link Fuse holder
LG HRC Power Fuses Conditions of selection Basic conditions for selecting the Power Fuses The rated of a Power Fuse should be higher than sum of the total rated 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- characteristics of the protected loads on the circuit. Also, set the occurred calories, by the l t 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 to be faster than those of the Power Fuses. For transformer protection Circuit Transformer Circuit Transformer Circuit Transformer Circuit Transformer Phase voltage capacity Applied fuses voltage capacity Applied fuses voltage capacity Applied fuses voltage capacity Applied fuses (kv) (kva) (kv) (kva) (kv) (kva) (kv) (kva) ~ LFL-3G-5B ~ LFL-G-5B ~ LFL-G-5B ~3 LFL-G-5B ~3 LFL-3G-B 3~5 LFL-G-B ~5 LFL-G-B 3~90 LFL-G-B 5~3 LFL-3G-B 30~ LFL-G-B 5~3 LFL-G-B 99~ LFL-G-B ~ LFL-3G-30B ~ LFL-G-30B 75~55 LFL-G-30B 9~3 LFL-G-30B ~ LFL-3G-B 0~5 LFL-G-B 33~79 LFL-G-B 7~557 LFL-G-B ф 3.3 9~ LFL-3G-50B. 9~ LFL-G-50B 73~359 LFL-G-50B.9 35~79 LFL-G-50B ~37 LFL-3G-0B 3~75 LFL-G-0B 5~ LFL-G-0B 30~97 LFL-G-0B 3ф 3.3 ~5 LFL-3G-75B 3~330 LFL-G-75B 90~57 LFL-G-75B 50~5 LFL-G-75B ~ LFL-3G-B 5~ LFL-G-B ~73 LFL-G-B 93~57 LFL-G-B 5~75 LFL-3G-5B 30~550 LFL-G-5B ~95 LFL-G-5B 3~90 LFL-G-5B ~35 LFL-3G-0B 5~70 LFL-G-0B 950~ LFL-G-0B 5~3 LFL-G-0B 5~ LFL-3G-0B 37~0 LFL-G-0B 300~55 LFL-G-0B 50~3050 LFL-G-0B.7~ LFL-3G-5B 3~ LFL-G-5B ~37 LFL-G-5B 3~75 LFL-G-5B ~ LFL-3G-B ~ LFL-G-B 37~7 LFL-G-B 75~57 LFL-G-B 5~53 LFL-3G-B 5~7 LFL-G-B 70~79 LFL-G-B 7~35 LFL-G-B 35~73 LFL-3G-30B 70~5 LFL-G-30B 9~9 LFL-G-30B 5~53 LFL-G-30B 9~3 LFL-3G-B 37~ LFL-G-B 3~ LFL-G-B ~95 LFL-G-B 5~77 LFL-3G-50B. 70~35 LFL-G-50B 99~3 LFL-G-50B.9 59~ LFL-G-50B ~3 LFL-3G-0B 9~7 LFL-G-0B 37~777 LFL-G-0B 75~55 LFL-G-0B 7~5 LFL-3G-75B 33~57 LFL-G-75B 500~99 LFL-G-75B 0~93 LFL-G-75B ~3 LFL-3G-B 3~7 LFL-G-B 00~3 LFL-G-B 00~5 LFL-G-B ~7 LFL-3G-5B 5~95 LFL-G-5B ~5 LFL-G-5B 3~330 LFL-G-5B 35~ LFL-3G-0B 735~ LFL-G-0B ~ LFL-G-0B 30~3 LFL-G-0B 59~7 LFL-3G-0B 755~5 LFL-G-0B 9~3 LFL-G-0B 593~57 LFL-G-0B Selecting conditions When ordering 5.5, 3kV Power Fuse, Refer to page 9.. For further information contact the manufacturer. The inrush of a transformer is selected assuming that the is time that of the full-load transformer in 0.sec. The rated of the Power Fuses is selected to continuously flow at.5time of the transformer rated. Power Fuses for proteting against short-circuit in the secondary part of a transformer are selected assuming that the is 5times that of the transformer rated in seconds. 5
For condenser protection Circuit Transformer Circuit Condenser Circuit Condenser Circuit Condenser Phase voltage capacity Applied fuses voltage capacity Applied fuses voltage capacity Applied fuses voltage capacity Applied fuses (kv) (kva) (kv) (kva) (kv) (kva) (kv) (kva) ~9. LFL-3G-5B ~9 LFL-G-5B ~ LFL-G-5B ~ LFL-G-5B 9.~ LFL-3G-B 9~ LFL-G-B ~39 LFL-G-B ~3 LFL-G-B ~3 LFL-3G-B ~ LFL-G-B 39~~97 LFL-G-B 3~3 LFL-G-B 3~ LFL-3G-30B ~9 LFL-G-30B 97~5 LFL-G-30B 3~37 LFL-G-30B ~ LFL-3G-B 9~ LFL-G-B 5~ LFL-G-B 37~5 LFL-G-B 3ф 3.3 ~ LFL-3G-50B. ~3 LFL-G-50B ~70 LFL-G-50B.9 5~5 LFL-G-50B ~5 LFL-3G-0B 3~ LFL-G-0B 70~3 LFL-G-0B 5~7 LFL-G-0B 5~50 LFL-3G-75B ~300 LFL-G-75B 3~90 LFL-G-75B 7~ LFL-G-75B 50~ LFL-3G-B 300~5 LFL-G-B 90~795 LFL-G-B ~55 LFL-G-B ~75 LFL-3G-5B 5~550 LFL-G-5B 795~3 LFL-G-5B 55~370 LFL-G-5B 75~370 LFL-3G-0B 550~7 LFL-G-0B 3~5 LFL-G-0B 370~370 LFL-G-0B 370~500 LFL-3G-0B 7~0 LFL-G-0B 5~9 LFL-G-0B 370~00 LFL-G-0B Selecting conditions The inrush of a condenser is selected to withstand 7time of the condenser rated in 0.00sec. The rated of the Power Fuses is selected to continuously flow at.3 times of the condenser rated. For motor protection For cable protection Circuit Circuit Phase voltage Motor output Applied fuses voltage Motor output Applied fuses (kv) (kva) (kv) (kva) Cable diameter (mm ) (A) of PF (A).5~.7 LFL-3G-5B 3~ LFL-G-5B.7~ LFL-3G-B ~3 LFL-G-B ~57 LFL-3G-B 3~ LFL-G-B 50~5 LFL-3G-30B ~7 LFL-G-30B 5~5 LFL-3G-B 7~30 LFL-G-B 3ф 3.3 5~ LFL-3G-50B. 30~ LFL-G-50B 3~9 LFL-3G-0B 7~3 LFL-G-0B ~5 LFL-3G-75B 3~503 LFL-G-75B 35~39 LFL-3G-B 9~739 LFL-G-B 93~35 LFL-3G-5B 5~70 LFL-G-5B 33~57 LFL-3G-0B 75~3 LFL-G-0B 375~30 LFL-3G-0B 5~70 LFL-G-0B 0.. 50 75 3.5 5.5 50 0 0 Selecting conditions The starting of a motor is selected to withstand 5 times of the full-loads in sec. Under the short-circuit condition, the power fuse breaks the circuit in high speed. Therefore, with relatively high rated, the Power Fuse protects small size cables. Selected to protect from above times of the short-circuit.
LG HRC Power Fuses Characteristics curves 0 00 00 0 0 0 0 0. 0. 0. 5A A 75A 3A 50A A 30A A A 5A 0. 0. 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 0. 0. 0. 0. 0 00 00 5A 5A 0 A A 0 A 75A 0 0 30A A 3A Cut-off (peak value:ka) Operating time (sec) 0. 0. 0. 50A 0. 0. 0.0 0.0 0.0 0.0 0.0 0 0 0 0 00 00 0 00 00 Prospective breaking (rms : ka) Prospective rated (rms : A) 0 00 00 0 0 0 0 0. 0. 0. 0A 0A 0. 0. 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 0. 0. 0. 0. 3./7.kV Cut-off characteristics 3./7.kV Pre-arcing time characteristics 3.kV Cut-off characteristics 3.kV Pre-arcing time characteristics 0 00 00 0 0 0A 0A 0 0 Cut-off (peak value:ka) 0. 0. 0. 0. 0. 0.0 0.0 0.0 0.0 0.0 0 0 0 0 00 00 0 00 00 Operating time (sec) Prospective breaking (rms : ka) Prospective rated (rms : A) 7
0 00 00 0 0 0 0 0. 0. 0. 0. 0. 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 0. 0. 0. 0. 7.kV Cut-off characteristics 7.kV Pre-arcing time characteristics 0 00 00 0 0 0A 0A 0 0 Cut-off (peak value:ka) 0A 0A Operating time (sec) 0. 0. 0. 0. 0. 0.0 0.0 0.0 0.0 0.0 0 0 0 0 00 00 0 00 00 000 000 00 Prospective breaking (rms : ka) Prospective rated (rms : A) 5.5kV Cut-off characteristics 5.5kV Pre-arcing time characteristics 0 00 00 Cut-off (peak value:ka) 0. 0. 0. A 75A 3A 50A A 30A A A 5A Operating time (sec) 0 0 0 0 0. 0. 0. 30A A A 5A A 75A 3A 50A A 0. 0. 0. 0.0 0.0 0.0 0. 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 0. 0. 0. 0. 0.0 0 0 0 0 00 00 0 00 00 000 000 Prospective breaking (rms : ka) Prospective rated (rms : A)
LG HRC Power Fuses Characteristics curves 0 00 00 0 0 0 0 0. 0. 0. 0. 0. 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 0. 0. 0. 0. kv Cut-off characteristics kv Pre-arcing time characteristics 0 00 00 5A 0A 0 A 0A 0 A 5A Cut-off (peak value:ka) 0A 0A 5A A 75A 3A 50A A 30A A A 5A Operating time (sec) 0 0 0. 0. 0. 30A A 50A A 75A 3A 0. 0. 0.0 0.0 0.0 0.0 0.0 0 0 0 0 00 00 0 00 00 000 000 00 Prospective breaking (rms : ka) Prospective rated (rms : A) 3kV Cut-off characteristics 3kV Pre-arcing time characteristics 0 00 00 0 Cut-off (peak value:ka) 0. 0. 0. 3A 50A A 30A A A 5A Operating time (sec) 0 0 0 0. 0. 0. 3A 50A A 30A A A 5A 0. 0. 0. 0.0 0.0 0.0 0. 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0. 0. 0. 0. 0. 5 0.0 0 0 0 0 00 00 0 00 00 000 000 Prospective breaking (rms : ka) Prospective rated (rms : A) 9
Striker operating characterstics Operating weight (kgf) Operating distance(mm) Operating characteristics of the Power Fuses The characteristics of the Power Fuses are native and fixed. Therefore it can not be regulated like a circuit breaker or overload relay. When ordering, please select the Power Fuses with proper and operating characteristics by considering its usage and circuit condition. Breaking a small. Power Fuses are not adequate to protect small. So, the manufacturer specifies and guarantees the minimum breaking by regulation. ) Select the rated of the Power Fuse, which does not operate below the minimum breaking. ) Protect the below the minimum value by use of other protective equipment.
LG HRC Power Fuses Fuse holder dimensions Indoor use Power Fuse holder LFH-G-DHB Type C (Peak height in open condition) 50 B 0.5 ф.5(hold) 70 Fuse size(a) B C ф 55.3 37 ф 77 53.3 30 Mounting hold 5 Earth hole 33 7 55 Below 35 3.7 Fuse checker 35 7. 55. Indoor use Power Fuse holder LFH-G-DHB/LFH-G-DHB/LFH-5G-D0B Type 5.5 (Peak height in open condition) 53.3 50 0.5 ф.5(hold) 70 Fuse size(a) B C D Applied Holder ф 55 9. 9.9 5 LFH-G-DHB Mounting hole ф 77 5.. 5 LFH-5G-D0B Earth hole 5 Fuse size(a) B C D Applied Holder ф 77 53.3 5.5 3.7 LFH-G-DHB Below 5 3 0 3.7 Fuse checker 35 7. 55.5 Indoor use Power Fuse holder LFH-G-DHB/LFH-5G-DHB/LFH-DHB LFH-30G-D0B Type C (Peak height in open condition) B 370 3.5 ф.5(hold) Mounting hold Fuse size(a) B C D E Applied Holder Earth hole 5 ф 55 3.3 7.5 3.7 7 LFH-G-DHB 7 9 300 ф 77 373.3 9. 3.7 7 LFH-5G-DHB ф 7 37.3 95 3.7 7 LFH-G-DHB Fuse size(a) B C D E Applied Holder 3.7 Fuse checker 35 ф 55. 79. 3 7 LFH-30G-D0B ф 77 55. 773.9 3 7
A Power Fuse holder E B C D Panel Conductor Panel E F E F Circuit Insulation Dimensions(mm) PH Holder type voltage voltage level Applied fuse (kv) (A) (kv) (BIL, kv) A B C D E F 3.3 5 50 37 77 97 30 LFL-3G-5B, B, B, 30B, B, 50B LFH-G-DHB 7. 3.3 5 5 30 77 97 30 LFL-3G-0B, 75B, B. 0 50 37 503 3 5 LFL-G-5B, B, B, 30B, B, 50B. 0 5 30 503 3 5 LFL-G-0B, 75B, B LFH-G-DHB 7. 0 3.3 5 5 5 57 5 97 30 LFL-3G-5B, 0B, 0B. 0 5 5 57 590 3 5 LFL-G-5B, 0B, 0B.9 5 7 33 73-0 LFL-G-5B, B, B LFH-G-DHB 0.9 5 7 37 9 957-0 LFL-G-30B, B, 50B, 0B.9 5 7 379 95 957-0 LFL-G-75C, C 5B, 0B, 0B
LG HRC Power Fuses Ordering information Types of P/F Link & P/F Holder P/F Link LFH Model name General use Revision No. voltage 3 3.kV 7.kV kv 5 5.5kV kv 30 3kV 5 30 50 0 75 5 0 0 5A A A 30A A 50A 3A 75A A 5A 0A 0A P/F Holder LFH Model name General use Indoor use Revision No. voltage 3./7.kV kv 5 5.5kV kv 30 3kV 0 3A H A H 0A Fuse checker 0 Without with 3
Basic conditions for selecting the Power Fuse Ratings Operating Voltage ( V) Frequency ( Hz) Ampere ( A) Breaking capacity ( kv) Schematic diagram of the installation Initial symmetrical short-circuit of the primary network power/impedance/reactance/voltage generators/transformers/reactors capacity of motors (over MW) capacity of capacitor bank and the inductance connected in series with them. Applications Transformers Set to allow continuous flow at.5 times of the rated of a transformer and to break at 5 times of the rated of a transformer within seconds when a short circuit condition occurs in the secondary part. Condenser - Inrush : set to allow flows at 7 times of the rated of a condenser for 0.00 seconds. - : set to allow continuous flows at.3 times of the rated of a condenser. Motor Cable Upstream protection by circuit breakers or contactors Operation & accessories Installed site Indoor Outdoor Fuse holder(base) Not needed Needed Fuse checker Not needed needed Example of ordering voltage : kv, Hz : 0Hz, : 0A, Breaking capacity : ka Application Upstream protection with circuit breaker Installed site Indoor Out door Fuse holder Not needed Needed Fuse checker Not needed Needed LFH-G-0B/LFH-G-D H B When ordering, please include this sheet
03-0 Safety Instructions For your safety, please read user s manual thoroughly before operating. Contact the nearest authorized service facility for examination, repair, or adjustment. Please contact qualified service technician when you need maintenance. Do not disassemble or repair by yourself! Any maintenance and inspection shall be performed by the personnel having expertise concerned. srjo@hn.vnn.vn LG Industrial Trading (Shanghai) Co., Ltd China Address: Room705-707, 7th Floor Xinda Commerical Building No 3, Xian Xia Road Shanahai Tel: --5-9 Fax: --7-37 e-mail: hgseo@lgis.com Room 303, 3F LG Industrial Systems Shanghai Office China Address: Room705-707, 7th Floor Xinda Commerical Building No 3, Xian Xia Road Shanahai, China Tel: --7-370 Fax: --7-30 sdhwang@lgis.com LG Industrial Systems Guangzhou Office China Address: Room 303, 3F, Zheng Sheng Building, No 5-, Tian He Bei Road, Guangzhou, China Tel: --755-3 Fax: --755-3 Specifications in this catalog are subject to change without notice due to continuous product development and improvement. younsupl@lgisusa.com HRC(A) 0 / Aug. 03 Printed in Korea STAFF