Round Cartridge Fuse Links With Knife Contacts

Applications

• Protection against overload and short-circuit in electric lines and equipment’s (type gG), also available for protection of motors (type aM).
• Rated voltage up to 600V; Rated current up to 630A; Working frequency 50Hz AC; Rated breaking capacity up to 100KA.Compliant with GB13539 and IEC269.

Design Features

• Variable cross-section fuse element made from pure metal sealed in cartridge made from high temperature resistant epoxy glass. Fuse tube filled with chemically treated high-purity quartz sand as arc-extinguishing medium. Dot-welding of fuse element ends to the knife contacts ensures reliable electric connection.

Table 1

Types		Rated voltage(V)	Rate current(A)	Dimension(mm)									Weight (g)
General	Cross Reference			Fig.	A	B	C	E	F	K	L	N
RO20	--	600	63~100	Figure 1	200	34	25	3	19	12.5	7	6.5	272
RO20A	--	250	63~100	Figure 1	149	27	25	3	19	12.5	7	6.5	139
RO20B	--	250	101~200	Figure 1	181	40	35	5	28	17.5	7	11	394
RO20C	--	600	101~200	Figure 1	244	46	35	5	28	17.5	7	11	610
RO20D	FRS-R	250	201~400	Figure 1	219	53	48	6	41	24	10.5	16	740
RO20E	--	600	201~400	Figure 1	295	66	48	6	41	24	10.5	16	1510
RO20F	--	250	401~630	Figure 1	264	66	57	6	51	28.5	13.5	19	1250
RO20G	--	600	401~630	Figure 1	340	76	57	6	51	28.5	13.5	19	2320

Note:

The above products can be made as Figure 2.

Table 2

Types		Rated voltage(V)	Rate current(A)	Dimension(mm)						Weight (g)
General	Cross Reference			Fig.	A	B	C	E	F
--	OT100	250	63~100	Figure 2	151	27	29	3.2	19.1	120
--	OT200	250	101~200	Figure 2	181	40.3	37.5	4.8	28.6	320

Characteristics Curve