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. 212-5734
Mfr. Part No.3KD4234-0PE40-0
BrandSiemens
TWD16,592.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5736
Mfr. Part No.3KD4830-0QE20-0
BrandSiemens
TWD38,876.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5737
Mfr. Part No.3KD4832-0QE10-0
BrandSiemens
TWD40,880.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 211-5990
Mfr. Part No.3VA1116-1AA46-0AA0
BrandSiemens
TWD17,835.00
Each
units
- Non-fused 4 0AA0 3VA11 - Enclosed - 160A - 160A - - -
RS Stock No. 203-9644
Mfr. Part No.5SG7123
BrandSiemens
TWD2,958.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 203-9645
Mfr. Part No.5SG7163
BrandSiemens
TWD3,763.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1367
Mfr. Part No.3NP1133-1CA11
BrandSiemens
TWD5,771.00
Each
units
- Fused 3 SENTRON 3NP11 - - NH00, NH000 - - 160A - - -
New
RS Stock No. 212-5799
Mfr. Part No.3LD2814-0TK53
BrandSiemens
TWD6,092.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5738
Mfr. Part No.3KD5030-0RE10-0
BrandSiemens
TWD68,534.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 203-2381
Mfr. Part No.5TE8112
BrandSiemens
TWD1,094.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5712
Mfr. Part No.3KD1630-2ME20-0
BrandSiemens
TWD2,377.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5776
Mfr. Part No.3LD2013-0TK51
BrandSiemens
TWD2,036.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5823
Mfr. Part No.3LD3450-0TL11
BrandSiemens
TWD2,641.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5784
Mfr. Part No.3LD2154-0TK51
BrandSiemens
TWD1,395.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5739
Mfr. Part No.3KD5030-0RE20-0
BrandSiemens
TWD68,534.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 211-0129
Mfr. Part No.3KF1408-0MB11
BrandSiemens
TWD11,142.00
Each
units
- Fused 4 SENTRON 3KF - Enclosed NH00, NH000 11 800A - 80A - - -
New
RS Stock No. 213-1381
Mfr. Part No.3LD2405-0TK11
BrandSiemens
TWD16,111.00
Each
units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 5 250A - 250A - - -
RS Stock No. 202-7147
Mfr. Part No.5SG7631-0KK16
BrandSiemens
TWD2,108.00
Each (In a Pack of 4)
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1376
Mfr. Part No.3LD2103-1TP51
BrandSiemens
TWD1,808.00
Each
units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 2 25A - 25A - - -
New
RS Stock No. 212-5777
Mfr. Part No.3LD2013-0TK53
BrandSiemens
TWD2,036.00
Each
units
- - - - - - - - - - - - - -