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. 813-9575
Mfr. Part No.GS2MU3N
£532.00
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 781-3819
Mfr. Part No.3631 5004
BrandSocomec
£85.31
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 608-7558
Mfr. Part No.GK1ES
£109.00
Each
Units
- - 3P - - - - 14 x 51mm - Yes 50A - Wire Lead -
RS Stock No. 762-2607
Mfr. Part No.OS32GD03P 1SCA115189R1001
BrandABB
£135.35
Each
Units
- - 3P - - - - 000 80A Yes 32 A 3 - DIN Rail
RS Stock No. 707-6177
Mfr. Part No.2CSM204703R1801 E 92/32 PV
BrandABB
£18.38
Each
Units
- - DP - - - - 10 x 38 mm - - 32 A 1 - -
RS Stock No. 710-0595
Mfr. Part No.OS125GB03P 1SCA115634R1001
BrandABB
£215.92
Each
Units
- - 3P - - - - A2, A3, A4 - Yes 125 A 3 - DIN Rail
RS Stock No. 708-1769
Mfr. Part No.GS2LB3
£135.45
Each
Units
- - 3P - - - - B1, B2 - Yes - 3 Wire Lead -
RS Stock No. 710-0598
Mfr. Part No.OS125GB04N1P 1SCA115901R1001
BrandABB
£257.03
Each
Units
- - 4P - - - - A2, A3, A4 - Yes 125 A 3 - DIN Rail
RS Stock No. 727-2369
Mfr. Part No.2CMA142423R1000 BWS 316Y TPN
BrandABB
£42.56
Each
Units
NO - 3P - - - - - 50A Yes 16 A - Cable -
RS Stock No. 781-3890
Mfr. Part No.38416024
BrandSocomec
£518.99
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 781-3787
Mfr. Part No.3631 4002
BrandSocomec
£72.51
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 710-0592
Mfr. Part No.OS160GB03P 1SCA115413R1001
BrandABB
£252.14
Each
Units
- - 3P - - - - A2, A3, A4 - Yes 160 A 3 - DIN Rail
RS Stock No. 608-7586
Mfr. Part No.GK1EX
£162.00
Each
Units
- - 3P + N - - - - 14 x 51mm - Yes 50A 1 Wire Lead -
RS Stock No. 762-2461
Mfr. Part No.OS125TPN-B
BrandABB
£688.52
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 238-4827
Mfr. Part No.0 058 21
BrandLegrand
£11.56
Each
Units
- - SP + N - - - - 10.3 x 25.8 mm - - 16 A 1 Cage DIN rail
RS Stock No. 727-5816
Mfr. Part No.OS250B22N2P 1SCA022778R9940
BrandABB
£253.04
Each
Units
- - 4P - - - - B1-B3 - Yes 250 A 3 Screw DIN Rail
RS Stock No. 708-1772
Mfr. Part No.GS2NB4
£484.00
Each
Units
- - 4P - - - - B1, B2, B3 - Yes - 3 Wire Lead -
RS Stock No. 608-7592
Mfr. Part No.GK1EY
£124.00
Each
Units
- - 4P - - - - 14 x 51mm - Yes 50A 1 Wire Lead -
RS Stock No. 727-5813
Mfr. Part No.OS250B04N2P 1SCA022750R7800
BrandABB
£489.44
Each
Units
- - 4P - - - - B1-B3 - Yes 250 A 3 Screw DIN Rail
RS Stock No. 727-2372
Mfr. Part No.2CMA142422R1000 BWS 625 TPN
BrandABB
£102.12
Each
Units
NO - 6P - - - - - 50A Yes 25 A - Cable -