Isolator & Switch Disconnectors

Fused switch disconnectors are devices used to ensure that a circuit is completely powered down in order for it to be serviced or maintained. They isolate a given part of the circuit by cutting off its electrical supply, making it safe for service or maintenance.

Fused switch disconnectors contain multiple fuses inside the same enclosure, so that it is easy to select and isolate a particular part of the circuit. For example an isolator switch can be used in a substation to physically disconnect any circuit when repairs are being carried out.

What are fused switch disconnectors used for?

Fused switch disconnectors protect workers performing maintenance on part of an electrical circuit, as well as preventing damage to the circuit itself. The advantage of using a fused switch disconnector over a non-fused switch disconnector one is that it can provide a higher level of safety compared with unfused disconnectors, as the fuse blows in the event of breaches such as short circuits or overcurrent. This makes it certain that that part of the circuit cannot have current flowing through it while being worked on.

Types of fused switch disconnectors

Fused switch disconnectors mainly differ depending on the type of fuses they house, the number of poles they have, and the terminal type.

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Description Price Normal State Configuration Fused/Non-Fused Number of Poles Range Series Throw Configuration Enclosed/Not Enclosed Mechanical Fuse Size Fuse Current Rating Auxiliary Contacts Available Maximum Current Electrical Phase Terminal Type Mounting Type
RS Stock No. 608-7564
Mfr. Part No.GK1ET
HK$1,670.24
Each
units
- - 4P - - - - 14 x 51 mm - Yes 50 A - Wire Lead DIN Rail
RS Stock No. 676-3221
Mfr. Part No.GS2N3
HK$5,411.12
Each
units
- - 3P - - - - 1 - Yes 200 A dc, 250 A ac 3 - DIN rail
RS Stock No. 608-7968
Mfr. Part No.GS1FD3
HK$2,631.20
Each
units
- - 3P - - - - 14 x 51 mm - Yes 40 A dc, 50 A ac 3 Screw DIN Rail
RS Stock No. 708-1740
Mfr. Part No.GS2DB4
HK$960.96
Each
units
- - 4P - - - - A1 - Yes 20 A dc, 23 A ac 3 Wire Lead DIN Rail
RS Stock No. 608-7930
Mfr. Part No.GS1DD3
HK$1,807.52
Each
units
- - 3P - - - - 10 x 38 mm - - 20 A dc, 32 A ac 3 Screw DIN Rail
RS Stock No. 608-7586
Mfr. Part No.GK1EX
HK$1,853.28
Each
units
- - 3P + N - - - - 14 x 51 mm - Yes 50 A 1 Wire Lead DIN Rail
RS Stock No. 608-7592
Mfr. Part No.GK1EY
HK$1,418.56
Each
units
- - 4P - - - - 14 x 51 mm - Yes 50 A 1 Wire Lead DIN Rail
RS Stock No. 608-7946
Mfr. Part No.GS1DD4
HK$2,242.24
Each
units
- - 4P - - - - 10 x 38 mm - - 20 A dc, 32 A ac 3 Screw DIN Rail
RS Stock No. 708-1778
Mfr. Part No.GS2NB3
HK$4,621.76
Each
units
- - 3P - - - - B1, B2, B3 - Yes 200 A dc, 250 A ac 3 Wire Lead DIN Rail
RS Stock No. 175-3656
Mfr. Part No.A9N15650
HK$175.17
Each
units
2P - 2 Acti 9 STI Double Throw - 8.5 x 31.5 mm 10A - - - Screw DIN Rail
RS Stock No. 676-3233
Mfr. Part No.GS2S3
HK$11,565.95
Each
units
- - 3P - - - - 3 - - 400 A dc, 630 A ac 3 - DIN rail
RS Stock No. 708-1769
Mfr. Part No.GS2LB3
HK$2,608.32
Each
units
- - 3P - - - - B1, B2 - Yes 125 A dc, 160 A ac 3 Wire Lead DIN Rail
RS Stock No. 813-9572
Mfr. Part No.GS2JU3N
HK$4,644.64
Each
units
- - 3 - - - - J 200kA Yes 100 A 3 Cable DIN Rail
RS Stock No. 676-3215
Mfr. Part No.GS2K3
HK$2,562.56
Each
units
- - 3P - - - - 22 x 58 mm - Yes 100 A dc, 125 A ac 3 - DIN rail
RS Stock No. 708-1756
Mfr. Part No.GS2JB3
HK$1,635.92
Each
units
- - 3P - - - - A4 - Yes 100 A ac, 100 A dc 3 Wire Lead DIN Rail
RS Stock No. 608-8040
Mfr. Part No.GS1KD3
HK$4,187.04
Each
units
- - 3P - - - - 22 x 58 mm - Yes 100 A dc, 125 A ac 3 Screw DIN Rail
RS Stock No. 708-1772
Mfr. Part No.GS2NB4
HK$5,456.88
Each
units
- - 4P - - - - B1, B2, B3 - Yes 200 A dc, 250 A ac 3 Wire Lead DIN Rail
RS Stock No. 676-3227
Mfr. Part No.GS2L3
HK$3,351.92
Each
units
- - 3P - - - - - - Yes 125 A dc, 160 A ac 3 - DIN rail
RS Stock No. 708-1744
Mfr. Part No.GS2GB3
HK$1,166.88
Each
units
- - 3P - - - - A2, A3 - Yes 40 A dc, 63 A ac 3 Wire Lead DIN Rail
RS Stock No. 608-8006
Mfr. Part No.GS1JD3
HK$3,832.40
Each
units
- - 3P - - - - 22 x 58 mm - Yes 100 A ac, 100 A dc 3 Screw DIN Rail