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. 204-1581
Mfr. Part No.T0-1-102/SE1/SVB
BrandEaton
MYR856.26
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3178
Mfr. Part No.3KD3040-0NE10-0
BrandSiemens
MYR726.64
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 100A - - -
New
RS Stock No. 218-3170
Mfr. Part No.3KD2840-0NE10-0
BrandSiemens
MYR531.81
Each
units
- Fused 4 SENTRON 3KD2 - - - - - 80A - - -
RS Stock No. 727-2362
Mfr. Part No.2CMA142417R1000
BrandABB
MYR301.99
Each
units
NO - 3P - - - - - 50A Yes 16 A - Cable -
New
RS Stock No. 218-3247
Mfr. Part No.3KF1303-0LB11
BrandSiemens
MYR821.42
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 32A - - -
New
RS Stock No. 218-3207
Mfr. Part No.3KD3640-0PE20-0
BrandSiemens
MYR1,526.99
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 200A - - -
New
RS Stock No. 212-5805
Mfr. Part No.3LD3150-0TL11
BrandSiemens
MYR213.78
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5802
Mfr. Part No.3LD3140-0TK11
BrandSiemens
MYR179.55
Each
units
- - - - - - - - - - - - - -
RS Stock No. 710-0573
Mfr. Part No.1SCA115259R1001
BrandABB
MYR609.72
Each
units
- - 3P - - - - A2, A3 - Yes 32 A 3 Screw DIN Rail
RS Stock No. 203-2381
Mfr. Part No.5TE8112
BrandSiemens
MYR169.41
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1402
Mfr. Part No.5TE1320
BrandSiemens
MYR705.58
Each
units
3P Fused 3 SENTRON 5TE Single Throw Enclosed - 125A - 125A - - -
New
RS Stock No. 211-2291
Mfr. Part No.GS1GD3
MYR1,379.56
Each
units
- Fused 3 TeSys GS GS1G - Enclosed - 63A - 63A - - -
New
RS Stock No. 212-5725
Mfr. Part No.3KD3430-2NE20-0
BrandSiemens
MYR895.13
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3225
Mfr. Part No.3KD4440-0QE20-0
BrandSiemens
MYR3,949.12
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 500A - - -
RS Stock No. 727-5838
Mfr. Part No.1SCA022719R0840
BrandABB
MYR3,763.69
Each
units
- - 3P - - - - B1-B4 - Yes 400 A 3 Screw DIN Rail
RS Stock No. 762-2468
Mfr. Part No.OS200TPN-B
BrandABB
MYR6,533.25
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5734
Mfr. Part No.3KD4234-0PE40-0
BrandSiemens
MYR2,179.91
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1371
Mfr. Part No.3NP1153-1BC10
BrandSiemens
MYR1,295.31
Each
units
- Fused 3 SENTRON 3NP11 - - NH1, NH2 - - 400A - - -
RS Stock No. 708-1778
Mfr. Part No.GS2NB3
MYR2,875.39
Each
units
- - 3P - - - - B1, B2, B3 - Yes - 3 Wire Lead -
RS Stock No. 707-6164
Mfr. Part No.2CSM204723R1801
BrandABB
MYR169.24
Each
units
- - 4P - - - - 10 x 38 mm - - 32 A 3 - -