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. 686-7398
Mfr. Part No.1SCA108840R1001
BrandABB
MYR568.11
Each
units
- - 3P - - - - A1 - Yes 32 A 3 Screw DIN Rail
RS Stock No. 708-1772
Mfr. Part No.GS2NB4
MYR3,394.37
Each
units
- - 4P - - - - B1, B2, B3 - Yes - 3 Wire Lead -
RS Stock No. 813-9575
Mfr. Part No.GS2MU3N
MYR3,731.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3216
Mfr. Part No.3KD4040-0PE20-0
BrandSiemens
MYR2,269.42
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 315A - - -
New
RS Stock No. 212-5717
Mfr. Part No.3KD2830-0NE20-0
BrandSiemens
MYR424.40
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5799
Mfr. Part No.3LD2814-0TK53
BrandSiemens
MYR800.35
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3235
Mfr. Part No.3KD5240-0RE10-0
BrandSiemens
MYR16,165.04
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 1250A - - -
RS Stock No. 534-5156
Mfr. Part No.MGFA0203C
MYR1,255.35
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3181
Mfr. Part No.3KD3040-2NE10-0
BrandSiemens
MYR810.88
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 100A - - -
New
RS Stock No. 218-3166
Mfr. Part No.3KD2640-2ME10-0
BrandSiemens
MYR482.32
Each
units
- Fused 4 SENTRON 3KD2 - - - - - 63A - - -
New
RS Stock No. 218-3274
Mfr. Part No.3KF3425-0LF11
BrandSiemens
MYR2,685.40
Each
units
- Fused 4 SENTRON 3KF - - NH0, NH1 - - 250A - - -
New
RS Stock No. 218-3240
Mfr. Part No.3KD5440-0RE20-0
BrandSiemens
MYR19,798.23
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 1600A - - -
New
RS Stock No. 212-5813
Mfr. Part No.3LD3340-0TK11
BrandSiemens
MYR333.83
Each
units
- - - - - - - - - - - - - -
RS Stock No. 726-4838
Mfr. Part No.15KXDC2F
BrandEaton
MYR1,444.50
Each
units
- - DP - - - - SA2 - - 20 A 1 - -
RS Stock No. 710-0602
Mfr. Part No.1SCA115896R1001
BrandABB
MYR2,191.26
Each
units
- - 4P - - - - A2, A3, A4 - Yes 160 A 3 - DIN Rail
RS Stock No. 676-3209
Mfr. Part No.GS2F3
MYR1,047.34
Each
units
- - - - - - - - - - - - - -
RS Stock No. 727-2369
Mfr. Part No.2CMA142423R1000
BrandABB
MYR345.11
Each
units
NO - 3P - - - - - 50A Yes 16 A - Cable -
New
RS Stock No. 212-5764
Mfr. Part No.3KF4340-2LF11
BrandSiemens
MYR3,791.15
Each
units
- - - - - - - - - - - - - -
RS Stock No. 708-1750
Mfr. Part No.GS2JB4
MYR1,359.15
Each
units
- - 4P - - - - A4 - Yes - 3 Wire Lead -
RS Stock No. 762-2616
Mfr. Part No.1SCA115639R1001
BrandABB
MYR1,222.63
Each
units
- - 3P - - - - 00, 000 160A Yes 125 A 3 - DIN Rail