Current Limiting Fuse-Link

• Breaking Capacity: High
• Usage: High Voltage
• Shape: Circle
• Size: 500
• Long: 660mm
• a: 100-200A
• Transport Package: Cartons Pallets Wooden Case
• Specification: IEC IEEE
• Trademark: OEIpower
• Origin: China Nanyang
• HS Code: 853890000
• Production Capacity: 100000

Product Description

The high-voltage back-up current-limiting fuse-links are designed for protection of systems which include

transformers, against the destructive results of short-circuits and overloads, by limiting the thermal and electro

dynamic effects of the short-circuit currents.

The fuse-links are complying with the industry standards - IEC 60282-1:2002, DIN 43625 and IEC 60787 - and

can be used both in outdoor and indoor applications.

• High breaking capacity - up to 50 kA

• Limitation of the short-circuit currents at low levels

• Low power dissipation - more energy savings and less heating

• Reliable interruption of the critical currents

• Minimum breaking current is relatively low, starting from 3xIn

• Low switching voltage - lower than 60 kV

• Low level of the cut-off current

• Unlimited lifetime due to the usage of pure silver melting element

• Same design for both indoor and outdoor usage

• Reliable proofing against humidity penetration of the fuse-link interior

• Highly qualitative raw materials and components.
 

he melting elements, consisting of pure-silver wire or strip, having variable sections, are precisely wounded on a

ceramic carrier, ending with copper terminal parts. Inside the cylindrical cavity of the carrier is a helical wire with

the role of activating the striking system. The striker is used to indicate the blown of the fuse-link and it also can

activate other systems. There are also models without striker.

The carrier system is introduced in a ceramic tube, sealed at ends with protective caps of nickel-plated copper,

which are also acting as contacts when mounting in the basement. The inside space of the tube is filled with

material for extinguishing electrical arcs, made of quartz sand with tight-controlled purity and granularity. Inside

the fuse-link tube all the contacts are made through spot welding.

The cooper caps are mechanically attached to the ends of the tube and proofed against humidity penetration

through the use of O-shaped seals of high-temperature resistant rubber.

The caps, which are the contact parts of the fuse-link, are of two types, according to specifications of DIN 43625

and IEC 60282-1:





 

When the current is between the minimal breaking and the nominal breaking values the fuse element melts and

evaporates, appearing the electrical arc. The arc is cooled and extinguished by the extinguishing element of the

fuse-link, thus ensuring the protection of the main circuit against damages.
 

 

S/N	Description	Units	Schedule A		Schedule B
1	Current ratings	A	5
2	Frequency	Hz	50
3	Rated Speed ratio		Type K as per IEC 60282 -2
4	Class of fuse link		Class B as per IEC 60282-2
5	Fuse element		Tin or Silver
6	Following Routine test results shall be provided on delivery of fuse links	Yes/No	a) a static strength test; and	Yes
			b) a resistance test, with the fuse-link under strain.	Yes
7	The following tests shall be performed on one fuse-link per batch and test results provided on delivery of  fuse links:	Yes/No	a)confirmation of the time/current characteristics; and	Yes
			b) a dynamic strength test.	Yes
8	Drawing showing construction and dimensions as per figure 1 below to be provided with bid	Yes/No	Yes
9	Previous type tests reports/certificate to be provided on bid.	Yes/No	Yes
10	Altitude above sea level	m	1400
11	Ambient operating	oC	-1 to 40

Performance Characteristic
Applied standard	IEEE C37.42-2009
Catalog number
Nominal system voltage kV	22
Rated Frequency Hz	50
Rated m aximum(design) voltage	27
Rated Continuous current A-RMS	100
Rated Interrupting current asymmetrical/symmetrical A-RMS	12000/8000
BIL 1.2x50 µs kV-peak	125
Minimum critical impulse flashover voltage(CFO)KV peak	140
Dry withstand voltage kV-RMS	42
Wet withstand voltage kV-RMS	36
Creepage distance to group Min.mm	320
Minimum creepage factor of insulator (Creepage Distance/arcing distance)	2

Performance Characteristic
Applied standard	IEC60282-2
Catalog number
Nominal system voltage kV	11
Rated Frequency Hz	50
Rated m aximum(design) voltage	12
Rated Continuous current A-RMS	100
Rated Interrupting current asymmetrical/symmetrical A-RMS	12000/8000
BIL 1.2x50 µs kV-peak	125
Minimum critical impulse flashover voltage(CFO)KV peak	140
Dry withstand voltage kV-RMS	42
Wet withstand voltage kV-RMS	36
Creepage distance to group Min.mm	372
Minimum creepage factor of insulator (Creepage Distance/arcing distance)	N/A

Performance Characteristic
Applied standard	IEEE C37.42-2009
Catalog number
Nominal system voltage kV	33
Rated Frequency Hz	50
Rated m aximum(design) voltage	38
Rated Continuous current A-RMS	100
Rated Interrupting current asymmetrical/symmetrical A-RMS	8000/5000
BIL 1.2x50 µs kV-peak	150
Minimum critical impulse flashover voltage(CFO)KV peak	165
Dry withstand voltage kV-RMS	70
Wet withstand voltage kV-RMS	60
Creepage distance to group Min.mm	650
Minimum creepage factor of insulator (Creepage Distance/arcing distance)	2.3

 

	DIMENSION(mm)
RATED CURRENT (A)	A	B	C	D	L MN
1 to 25	12.5+0.2	19.0+0.2	6.5	2.0	533,600,787
30 to 40	12.5+0.2	19.0+0.2	8.0	3.0	533,600,787
50 to 100	19.0+0.3	not applicable	9.0	5.0	533,600,787
140 to 200	19.0+0.3	not applicable	13.0	7.0	533,600,787