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
New
RS Stock No. 212-5809
Mfr. Part No.3LD3240-0TK11
BrandSiemens
MYR192.72
Each
units
- - - - - - - - - - - - - -
RS Stock No. 727-5790
Mfr. Part No.OS200B03N3P 1SCA022750R0620
BrandABB
MYR2,584.81
Each
units
- - 3P + N - - - - B1-B2 - Yes 200 A 3 Screw DIN Rail
New
RS Stock No. 218-3259
Mfr. Part No.3KF1406-0LB11
BrandSiemens
MYR1,300.58
Each
units
- Fused 4 SENTRON 3KF - - NH00, NH000 - - 63A - - -
New
RS Stock No. 218-3189
Mfr. Part No.3KD3240-2NE20-0
BrandSiemens
MYR995.18
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 125A - - -
New
RS Stock No. 218-3266
Mfr. Part No.3KF2316-2LF11
BrandSiemens
MYR1,595.44
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 160A - - -
RS Stock No. 781-3796
Mfr. Part No.3631 5002
BrandSocomec
MYR498.81
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5731
Mfr. Part No.3KD3834-0PE40-0
BrandSiemens
MYR1,579.65
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1365
Mfr. Part No.3NP1123-1JC20
BrandSiemens
MYR295.39
Each
units
- Fused 3 SENTRON 3NP11 - - NH000 - - 160A - - -
RS Stock No. 608-8006
Mfr. Part No.GS1JD3
MYR2,385.63
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3171
Mfr. Part No.3KD2840-0NE20-0
BrandSiemens
MYR531.81
Each
units
- Fused 4 SENTRON 3KD2 - - - - - 80A - - -
RS Stock No. 204-1572
Mfr. Part No.P1-32/SE1/SVB
BrandEaton
MYR1,037.71
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3174
Mfr. Part No.3KD2842-0NE10-0
BrandSiemens
MYR705.58
Each
units
- Fused 4 SENTRON 3KD2 - - - - - 80A - - -
New
RS Stock No. 218-3215
Mfr. Part No.3KD4040-0PE10-0
BrandSiemens
MYR2,269.42
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 315A - - -
New
RS Stock No. 211-4106
Mfr. Part No.3KF2316-0LF11
BrandSiemens
MYR1,321.64
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 160A - - -
New
RS Stock No. 218-3177
Mfr. Part No.3KD3030-2NE20-0
BrandSiemens
MYR647.65
Each
units
- Fused 3 SENTRON 3KD3 - - - - - 100A - - -
New
RS Stock No. 218-3182
Mfr. Part No.3KD3040-2NE20-0
BrandSiemens
MYR810.88
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 100A - - -
New
RS Stock No. 212-5736
Mfr. Part No.3KD4830-0QE20-0
BrandSiemens
MYR6,125.46
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 211-5990
Mfr. Part No.3VA1116-1AA46-0AA0
BrandSiemens
MYR2,343.14
Each
units
- Non-fused 4 0AA0 3VA11 - Enclosed - 160A - 160A - - -
New
RS Stock No. 218-3253
Mfr. Part No.3KF1306-4RB11
BrandSiemens
MYR1,037.30
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 63A - - -
New
RS Stock No. 213-1354
Mfr. Part No.3LD2044-1TL51
BrandSiemens
MYR334.69
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -