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. 203-9645
Mfr. Part No.5SG7163
BrandSiemens
MYR582.69
Each
units
- - - - - - - - - - - - - -
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. 819-983
Mfr. Part No.60KXSC2F
BrandEaton
MYR1,963.82
Each
units
- - SP - - - - - - - 63 A 1 - -
RS Stock No. 136-5277
BrandRS PRO
MYR862.49
Each
units
6NO - 6 - - 6PST - - - - 63A 3 - Wall Mount
New
RS Stock No. 216-5961
Mfr. Part No.3NP1143-1DA10
BrandSiemens
MYR610.80
Each
units
- Fused 3 SENTRON 3NP11 - - NH0, NH1 - - 250A - - -
New
RS Stock No. 216-5955
Mfr. Part No.3LD2305-1TL11
BrandSiemens
MYR2,132.52
Each
units
- Fused 4 SENTRON 3LD - - - - - 160A - - -
New
RS Stock No. 218-3211
Mfr. Part No.3KD3840-0PE10-0
BrandSiemens
MYR1,974.56
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 250A - - -
RS Stock No. 179-9648
Mfr. Part No.38313016
BrandSocomec
MYR1,873.11
Each
units
3P - 3 FUSERBLOC - - - - 160A Yes 160 A - - DIN Rail
New
RS Stock No. 212-5724
Mfr. Part No.3KD3232-2NE10-0
BrandSiemens
MYR979.38
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5793
Mfr. Part No.3LD2545-0TK51
BrandSiemens
MYR468.63
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 - - -
RS Stock No. 762-2461
Mfr. Part No.OS125TPN-B
BrandABB
MYR4,828.70
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5732
Mfr. Part No.3KD4030-0PE10-0
BrandSiemens
MYR1,816.59
Each
units
- - - - - - - - - - - - - -
RS Stock No. 181-2586
Mfr. Part No.A9N15646
MYR127.47
Each
units
- - - - - - - - - - - - - -
RS Stock No. 781-3840
Mfr. Part No.3831 6012
BrandSocomec
MYR1,456.87
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3238
Mfr. Part No.3KD5430-0RE10-0
BrandSiemens
MYR15,954.42
Each
units
- Fused 3 SENTRON 3KD4 - - - - - 1600A - - -
New
RS Stock No. 218-3296
Mfr. Part No.3LD2054-1TL53
BrandSiemens
MYR214.31
Each
units
- Fused 4 SENTRON 3LD - - - - - 16A - - -
RS Stock No. 819-949
Mfr. Part No.15KXSC2F
BrandEaton
MYR1,004.07
Each
units
- - SP - - - - - - - 20 A 1 - -
New
RS Stock No. 216-5964
Mfr. Part No.3NP1163-1DA10
BrandSiemens
MYR1,121.55
Each
units
- Fused 3 SENTRON 3NP11 - - NH2, NH3 - - 630A - - -
New
RS Stock No. 218-3258
Mfr. Part No.3KF1403-0MB11
BrandSiemens
MYR1,032.04
Each
units
- Fused 4 SENTRON 3KF - - NH00, NH000 - - 32A - - -