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. 781-3793
Mfr. Part No.3631 4003
BrandSocomec
TWD4,000.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1357
Mfr. Part No.3LD2330-0TK11
BrandSiemens
TWD13,065.00
Each
units
- Fused 3 SENTRON 3LD - - - - - 160A - - -
New
RS Stock No. 218-3272
Mfr. Part No.3KF3325-0MF11-8AA1
BrandSiemens
TWD16,259.00
Each
units
- Fused 3 SENTRON 3KF - - NH0, NH1 - - 250A - - -
RS Stock No. 727-5807
Mfr. Part No.OS250B03P 1SCA022750R6660
BrandABB
TWD19,781.00
Each
units
- - 3P - - - - B1-B3 - Yes 250 A 3 Screw DIN Rail
New
RS Stock No. 212-5797
Mfr. Part No.3LD2714-0TK53
BrandSiemens
TWD4,890.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 708-1747
Mfr. Part No.GS2DB3
TWD2,658.00
Each
units
- - 3P - - - - A1 - Yes - 3 Wire Lead -
RS Stock No. 181-2586
Mfr. Part No.A9N15646
TWD806.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 726-4740
Mfr. Part No.104GC
BrandEaton
TWD41,991.00
Each
units
- - 3P + N - - - - - - - 100A 3 - -
New
RS Stock No. 218-3262
Mfr. Part No.3KF1408-2LB11
BrandSiemens
TWD12,663.00
Each
units
- Fused 4 SENTRON 3KF - - NH00, NH000 - - 80A - - -
New
RS Stock No. 218-3305
Mfr. Part No.3LD3130-0TL11
BrandSiemens
TWD1,422.00
Each
units
- Fused 4 SENTRON 3LD - - - - - 25A - - -
New
RS Stock No. 218-3279
Mfr. Part No.3KF5363-0MF11
BrandSiemens
TWD50,334.00
Each
units
- Fused 3 SENTRON 3KF - - NH2, NH3 - - 630A - - -
RS Stock No. 707-6161
Mfr. Part No.2CSM204733R1801 E 93N/32
BrandABB
TWD1,372.00
Each
units
- - 3P + N - - - - 10 x 38 mm - - 32 A 3 - -
New
RS Stock No. 218-3196
Mfr. Part No.3KD3432-2NE10-0
BrandSiemens
TWD8,229.00
Each
units
- Fused 3 SENTRON 3KD3 - - - - - 160A - - -
New
RS Stock No. 212-5727
Mfr. Part No.3KD3630-0NE20-0
BrandSiemens
TWD7,495.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5724
Mfr. Part No.3KD3232-2NE10-0
BrandSiemens
TWD7,455.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 203-9643
Mfr. Part No.5SG7113
BrandSiemens
TWD1,443.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 781-3894
Mfr. Part No.3841 3032
BrandSocomec
TWD15,808.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 203-2109
Mfr. Part No.3NP1133-1CA10
BrandSiemens
TWD1,587.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1363
Mfr. Part No.3NP1123-1BC20
BrandSiemens
TWD2,248.00
Each
units
- Fused 3 SENTRON 3NP11 - - - - - 160A - - -
New
RS Stock No. 212-5803
Mfr. Part No.3LD3140-0TL11
BrandSiemens
TWD1,611.00
Each
units
- - - - - - - - - - - - - -