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. 518-7130
Mfr. Part No.3LD2250-0TK13
BrandSiemens
£25.44
Each
Units
- - - - - - - - 10A - 32 A - - Panel Mount
New
RS Stock No. 213-1382
Mfr. Part No.3LD2504-1TP51
BrandSiemens
£66.51
Each
Units
- Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 3 63A - 63A - - -
New
RS Stock No. 212-5813
Mfr. Part No.3LD3340-0TK11
BrandSiemens
£55.10
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 202-7056
Mfr. Part No.5SG7611-0KK10
BrandSiemens
£16.392
Each (In a Pack of 12)
Units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1383
Mfr. Part No.3LD2830-0TK11
BrandSiemens
£101.57
Each
Units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 4 125A - 125A - - -
RS Stock No. 202-7126
Mfr. Part No.5SG7611-0KK16
BrandSiemens
£16.392
Each (In a Pack of 12)
Units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5815
Mfr. Part No.3LD3340-0TL11
BrandSiemens
£66.66
Each
Units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5762
Mfr. Part No.3KF3325-2LF11
BrandSiemens
£402.38
Each
Units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5823
Mfr. Part No.3LD3450-0TL11
BrandSiemens
£57.27
Each
Units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1371
Mfr. Part No.3NP1153-1BC10
BrandSiemens
£241.91
Each
Units
- Fused 3 SENTRON 3NP11 - - NH1, NH2 - - 400A - - -
New
RS Stock No. 212-5816
Mfr. Part No.3LD3350-0TL11
BrandSiemens
£51.36
Each
Units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5788
Mfr. Part No.3LD2230-0TK11
BrandSiemens
£31.81
Each
Units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5721
Mfr. Part No.3KD3032-0NE10-0
BrandSiemens
£126.89
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 203-1994
Mfr. Part No.3NP1123-1CA20
BrandSiemens
£36.06
Each
Units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5764
Mfr. Part No.3KF4340-2LF11
BrandSiemens
£625.72
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 202-7147
Mfr. Part No.5SG7631-0KK16
BrandSiemens
£22.328
Each (In a Pack of 4)
Units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1372
Mfr. Part No.3NP1153-1DA10
BrandSiemens
£155.86
Each
Units
- Fused 3 SENTRON 3NP11 - - NH1, NH2 - - 400A - - -
New
RS Stock No. 212-5794
Mfr. Part No.3LD2545-0TK53
BrandSiemens
£77.34
Each
Units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5801
Mfr. Part No.3LD2866-0TB51
BrandSiemens
£351.96
Each
Units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5817
Mfr. Part No.3LD3430-0TK11
BrandSiemens
£40.50
Each
Units
- - - - - - - - - - - - - -