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
MYR251.29
Each
units
- - - - - - - - 10A - 32 A - - Panel Mount
New
RS Stock No. 212-5804
Mfr. Part No.3LD3150-0TK11
BrandSiemens
MYR149.54
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5717
Mfr. Part No.3KD2830-0NE20-0
BrandSiemens
MYR424.40
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1357
Mfr. Part No.3LD2330-0TK11
BrandSiemens
MYR1,716.55
Each
units
- Fused 3 SENTRON 3LD - - - - - 160A - - -
New
RS Stock No. 213-1382
Mfr. Part No.3LD2504-1TP51
BrandSiemens
MYR429.66
Each
units
- Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 3 63A - 63A - - -
New
RS Stock No. 212-5792
Mfr. Part No.3LD2530-0TK13
BrandSiemens
MYR296.97
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5723
Mfr. Part No.3KD3230-2NE20-0
BrandSiemens
MYR795.09
Each
units
- - - - - - - - - - - - - -
RS Stock No. 202-7250
Mfr. Part No.5SG7611-0KK06
BrandSiemens
MYR89.979
Each (In a Pack of 12)
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1354
Mfr. Part No.3LD2044-1TL51
BrandSiemens
MYR279.07
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -
RS Stock No. 202-7147
Mfr. Part No.5SG7631-0KK16
BrandSiemens
MYR279.593
Each (In a Pack of 4)
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5730
Mfr. Part No.3KD3632-0PE10-0
BrandSiemens
MYR1,458.54
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5762
Mfr. Part No.3KF3325-2LF11
BrandSiemens
MYR2,437.92
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1355
Mfr. Part No.3LD2064-1TC51
BrandSiemens
MYR353.31
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -
New
RS Stock No. 212-5810
Mfr. Part No.3LD3250-0TK11
BrandSiemens
MYR168.50
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1383
Mfr. Part No.3LD2830-0TK11
BrandSiemens
MYR658.19
Each
units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 4 125A - 125A - - -
New
RS Stock No. 212-5789
Mfr. Part No.3LD2514-0TK51
BrandSiemens
MYR391.23
Each
units
- - - - - - - - - - - - - -
RS Stock No. 203-1976
Mfr. Part No.3NJ4103-3BF02
BrandSiemens
MYR343.16
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5793
Mfr. Part No.3LD2545-0TK51
BrandSiemens
MYR468.63
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5712
Mfr. Part No.3KD1630-2ME20-0
BrandSiemens
MYR312.24
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5788
Mfr. Part No.3LD2230-0TK11
BrandSiemens
MYR192.72
Each
units
- - - - - - - - - - - - - -