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. 218-3283
Mfr. Part No.3KF5380-2LF11
BrandSiemens
TWD63,117.00
Each
units
- Fused 3 SENTRON 3KF - - NH2, NH3 - - 800A - - -
RS Stock No. 781-3816
Mfr. Part No.3831 6005
BrandSocomec
TWD5,522.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3311
Mfr. Part No.3NP5060-0EA86
BrandSiemens
TWD24,608.00
Each
units
- Fused 3 SENTRON 3NP506 - - NH00, NH000 - - 160A - - -
New
RS Stock No. 218-3240
Mfr. Part No.3KD5440-0RE20-0
BrandSiemens
TWD150,204.00
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 1600A - - -
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. 212-5796
Mfr. Part No.3LD2714-0TK51
BrandSiemens
TWD4,890.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1379
Mfr. Part No.3LD2305-0TK13
BrandSiemens
TWD13,306.00
Each
units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 5 160A - 160A - - -
New
RS Stock No. 218-3175
Mfr. Part No.3KD2842-2NE10-0
BrandSiemens
TWD5,872.00
Each
units
- Fused 4 SENTRON 3KD2 - - - - - 80A - - -
RS Stock No. 762-2622
Mfr. Part No.OS160GD04N2P 1SCA115882R1001
BrandABB
TWD13,849.00
Each
units
- - 4P - - - - 00, 000 160A Yes 160 A 3 - DIN Rail
RS Stock No. 136-5277
BrandRS PRO
TWD5,540.00
Each
units
6NO - 6 - - 6PST - - - - 63A 3 - Wall Mount
RS Stock No. 707-6158
Mfr. Part No.2CSM200883R1801 E 92/32
BrandABB
TWD628.00
Each
units
- - DP - - - - 10 x 38 mm - - 32 A 1 - -
New
RS Stock No. 212-0296
Mfr. Part No.VC4GUN
TWD6,279.00
Each
units
- - 3 TeSys VC-GUN - Enclosed - 80A - 63A - - -
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. 218-3288
Mfr. Part No.3KF5480-0MF11
BrandSiemens
TWD75,501.00
Each
units
- Fused 4 SENTRON 3KF - - NH2, NH3 - - 800A - - -
New
RS Stock No. 211-4105
Mfr. Part No.3KF2312-0MF11
BrandSiemens
TWD9,068.00
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 125A - - -
New
RS Stock No. 212-5812
Mfr. Part No.3LD3330-0TL11
BrandSiemens
TWD1,759.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1371
Mfr. Part No.3NP1153-1BC10
BrandSiemens
TWD9,859.00
Each
units
- Fused 3 SENTRON 3NP11 - - NH1, NH2 - - 400A - - -
RS Stock No. 781-3828
Mfr. Part No.3831 6006
BrandSocomec
TWD7,043.00
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 216-5964
Mfr. Part No.3NP1163-1DA10
BrandSiemens
TWD8,509.00
Each
units
- Fused 3 SENTRON 3NP11 - - NH2, NH3 - - 630A - - -
New
RS Stock No. 218-3226
Mfr. Part No.3KD4442-0QE10-0
BrandSiemens
TWD31,998.00
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 500A - - -