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. 708-1756
Mfr. Part No.GS2JB3
SGD286.56
Each
units
- - 3P - - - - A4 - Yes 100 A ac, 100 A dc 3 Wire Lead DIN Rail
RS Stock No. 518-7130
Mfr. Part No.3LD2250-0TK13
BrandSiemens
SGD49.64
Each
units
- - - - - - - - 10A - 32 A - - Panel Mount
RS Stock No. 179-9657
Mfr. Part No.57025014
BrandSocomec
SGD103.73
Each
units
3P+N - 3 RMS - - - 14 x 51 mm 50A Yes 50 A - - -
RS Stock No. 608-7930
Mfr. Part No.GS1DD3
SGD306.52
Each
units
- - 3P - - - - 10 x 38 mm - - 20 A dc, 32 A ac 3 Screw DIN Rail
RS Stock No. 608-7570
Mfr. Part No.GK1EW
SGD236.68
Each
units
- - 3P - - - - 14 x 51 mm - Yes 50 A 1 Wire Lead DIN Rail
RS Stock No. 707-6164
Mfr. Part No.2CSM204723R1801
BrandABB
SGD56.49
Each
units
- - 4P - - - - 10 x 38 mm - - 32 A 3 - -
RS Stock No. 708-1769
Mfr. Part No.GS2LB3
SGD456.89
Each
units
- - 3P - - - - B1, B2 - Yes 125 A dc, 160 A ac 3 Wire Lead DIN Rail
RS Stock No. 781-3825
Mfr. Part No.3831 3006
BrandSocomec
SGD184.06
Each
units
- - 3P - - - - 00C - Yes 63 A - Shroud DIN Rail
RS Stock No. 707-6158
Mfr. Part No.2CSM200883R1801
BrandABB
SGD26.77
Each
units
- - DP - - - - 10 x 38 mm - - 32 A 1 - -
RS Stock No. 499-7201
Mfr. Part No.78640548 & T0-2-8900/E/EZ-P1(RS499-7201)
BrandEaton
SGD35.62
Each
units
- - 4P - - - - gG/gL 20A - 20 A - - Panel Mount
RS Stock No. 707-6155
Mfr. Part No.2CSM200893R1801
BrandABB
SGD19.44
Each
units
- - SP + N - - - - 10 x 38 mm - - 32 A 1 - -
RS Stock No. 710-0598
Mfr. Part No.1SCA115901R1001
BrandABB
SGD501.82
Each
units
- - 4P - - - - A2, A3, A4 - Yes 125 A 3 - DIN Rail
RS Stock No. 762-2648
Mfr. Part No.1SCA022825R2830
BrandABB
SGD2,062.01
Each
units
- - 3P - - - - 3 800A Yes 630 A 3 - DIN Rail
New
RS Stock No. 204-1585
Mfr. Part No.T0-2-8900/SE1/SVB
BrandEaton
SGD251.48
Each
units
4 NO Fused 3Poles + N Main Switch, Maintenance Switch, Switch Disconnector T0 - Enclosed - 20A - 6 kA - - -
New
RS Stock No. 204-1579
Mfr. Part No.T0-2-1/SE1/SVB
BrandEaton
SGD244.73
Each
units
3 NO Fused 3 Main Switch, Maintenance Switch, Switch Disconnector T0 - Enclosed - 20A - 6 kA - - -
RS Stock No. 238-4827
Mfr. Part No.0 058 21
BrandLegrand
SGD21.48
Each
units
- - SP + N - - - - 10.3 x 25.8 mm - - 16 A 1 Cage DIN rail
RS Stock No. 727-2372
Mfr. Part No.2CMA142422R1000
BrandABB
SGD204.64
Each
units
NO - 6P - - - - - 50A Yes 25 A - Cable -
RS Stock No. 781-3853
Mfr. Part No.3831 6015
BrandSocomec
SGD430.68
Each
units
- - 4P - - - - 00 - Yes 160 A - Shroud DIN Rail
RS Stock No. 419-031
Mfr. Part No.KNB50SF4
SGD359.22
Each
units
- - 3P + N - Harmony K - - NF 14 x 51 - - 50 A 3 Cable Clamp -
RS Stock No. 762-2622
Mfr. Part No.1SCA115882R1001
BrandABB
SGD697.04
Each
units
- - 4P - - - - 000, 00 160A Yes 160 A 3 - DIN Rail
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