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 Number of Poles Range Series Throw Configuration Mechanical Fuse Size Fuse Current Rating Auxiliary Contacts Available Maximum Current Electrical Phase Terminal Type Mounting Type Minimum Operating Temperature Maximum Operating Temperature
RS Stock No. 676-3227
Mfr. Part No.GS2L3
TWD13,176.00
Each
units
- 3P - - - - - Yes 125 A dc, 160 A ac 3 - DIN rail -20°C +70°C
RS Stock No. 608-8040
Mfr. Part No.GS1KD3
TWD16,458.00
Each
units
- 3P - - - 22 x 58 mm - Yes 100 A dc, 125 A ac 3 Screw DIN Rail - -
RS Stock No. 608-8006
Mfr. Part No.GS1JD3
TWD15,064.00
Each
units
- 3P - - - 22 x 58 mm - Yes 100 A ac, 100 A dc 3 Screw DIN Rail - -
RS Stock No. 676-3215
Mfr. Part No.GS2K3
TWD10,073.00
Each
units
- 3P - - - 22 x 58 mm - Yes 100 A dc, 125 A ac 3 - DIN rail -20°C +70°C
RS Stock No. 676-3221
Mfr. Part No.GS2N3
TWD21,269.00
Each
units
- 3P - - - 1 - Yes 200 A dc, 250 A ac 3 - DIN rail -20°C +70°C
RS Stock No. 181-2586
Mfr. Part No.A9N15646
TWD726.00
Each
units
- - Spacial - - - - - - - - Direct Mount - -
RS Stock No. 708-1772
Mfr. Part No.GS2NB4
TWD21,449.00
Each
units
- 4P - - - B1, B2, B3 - Yes 200 A dc, 250 A ac 3 Wire Lead DIN Rail -20°C +70°C
RS Stock No. 608-7564
Mfr. Part No.GK1ET
TWD6,565.00
Each
units
- 4P - - - 14 x 51 mm - Yes 50 A - Wire Lead DIN Rail -50°C +70°C
RS Stock No. 708-1756
Mfr. Part No.GS2JB3
TWD6,430.00
Each
units
- 3P - - - A4 - Yes 100 A ac, 100 A dc 3 Wire Lead DIN Rail -20°C +70°C
RS Stock No. 708-1744
Mfr. Part No.GS2GB3
TWD4,587.00
Each
units
- 3P - - - A2, A3 - Yes 40 A dc, 63 A ac 3 Wire Lead DIN Rail -20°C +70°C
RS Stock No. 815-3691
Mfr. Part No.GS1DDU3
TWD6,951.00
Each
units
- 3 - - - CC - - 30 A - - DIN Rail - -
RS Stock No. 813-9575
Mfr. Part No.GS2MU3N
TWD23,113.00
Each
units
- 3 - - - J 200kA Yes 200 A 3 Cable DIN Rail - -
RS Stock No. 708-1769
Mfr. Part No.GS2LB3
TWD10,253.00
Each
units
- 3P - - - B1, B2 - Yes 125 A dc, 160 A ac 3 Wire Lead DIN Rail -20°C +70°C
RS Stock No. 708-1753
Mfr. Part No.GS2GB4
TWD6,071.00
Each
units
- 4P - - - A2, A3 - Yes 40 A dc, 63 A ac 3 Wire Lead DIN Rail -20°C +70°C
RS Stock No. 708-1750
Mfr. Part No.GS2JB4
TWD8,544.00
Each
units
- 4P - - - A4 - Yes 100 A ac, 100 A dc 3 Wire Lead DIN Rail -20°C +70°C
RS Stock No. 608-7570
Mfr. Part No.GK1EW
TWD5,486.00
Each
units
- 3P - - - 14 x 51 mm - Yes 50 A 1 Wire Lead DIN Rail -50°C +70°C
RS Stock No. 419-031
Mfr. Part No.KNB50SF4
TWD8,061.00
Each
units
- 3P + N - Harmony K - NF 14 x 51 - - 50 A 3 Cable Clamp - - -
RS Stock No. 708-1740
Mfr. Part No.GS2DB4
TWD3,777.00
Each
units
- 4P - - - A1 - Yes 20 A dc, 23 A ac 3 Wire Lead DIN Rail -20°C +70°C
RS Stock No. 608-7946
Mfr. Part No.GS1DD4
TWD8,814.00
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
TWD17,726.00
Each
units
- 3P - - - B1, B2, B3 - Yes 200 A dc, 250 A ac 3 Wire Lead DIN Rail -20°C +70°C