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. 513-5741
Mfr. Part No.3841 3039
BrandSocomec
HK$4,418.68
Each
units
- - 3P - - - - - 10A - 400 A 3 - -
RS Stock No. 608-7564
Mfr. Part No.GK1ET
HK$1,670.24
Each
units
- - 4P - - - - 14 x 51 mm - Yes 50 A - Wire Lead DIN Rail
RS Stock No. 513-5729
Mfr. Part No.3841 3021
BrandSocomec
HK$2,066.81
Each
units
- - 3P - - - - B1-B2 200A - 200 A 3 - -
RS Stock No. 513-5707
Mfr. Part No.3841 3010
BrandSocomec
HK$1,028.99
Each
units
- - 3P - - - - - 10A - 100 A 3 - -
RS Stock No. 512-9459
Mfr. Part No.OS100GB12P
BrandABB
HK$2,009.44
Each
units
- - 3P - - - - BS - Yes 100 A 3 Conduit DIN Rail
RS Stock No. 513-5713
Mfr. Part No.3841 3016
BrandSocomec
HK$2,524.61
Each
units
- - 3P - - - - - 10A - 160 A 3 - -
RS Stock No. 710-0573
Mfr. Part No.1SCA115259R1001
BrandABB
HK$994.59
Each
units
- - 3P - - - - A2, A3 - Yes 32 A 3 Screw DIN Rail
RS Stock No. 247-4065
Mfr. Part No.DTL400KIT
HK$2,879.45
Each
units
- - 3P - - - - NH02 - - 400 A 3 - Surface Mount
RS Stock No. 381-5726
Mfr. Part No.5560S
HK$100.32
Each
units
- - DP - Sentry - - - - - 63 A - Tunnel -
RS Stock No. 513-2073
Mfr. Part No.3641 3000
BrandSocomec
HK$445.24
Each
units
- - 3P - - - - A1 - Yes 20 A 3 Shroud -
RS Stock No. 608-7968
Mfr. Part No.GS1FD3
HK$2,631.20
Each
units
- - 3P - - - - 14 x 51 mm - Yes 40 A dc, 50 A ac 3 Screw DIN Rail
RS Stock No. 676-3221
Mfr. Part No.GS2N3
HK$5,411.12
Each
units
- - 3P - - - - 1 - Yes 200 A dc, 250 A ac 3 - DIN rail
RS Stock No. 762-2648
Mfr. Part No.1SCA022825R2830
BrandABB
HK$11,771.76
Each
units
- - 3P - - - - 3 800A Yes 630 A 3 - DIN Rail
RS Stock No. 707-6152
Mfr. Part No.2CSM204753R1801
BrandABB
HK$249.32
Each
units
- - 3P - - - - 10 x 38 mm - - 32 A 3 - -
RS Stock No. 762-2641
Mfr. Part No.1SCA022719R0250
BrandABB
HK$6,833.11
Each
units
- - 3P - - - - 0 → 2 500A Yes 400 A 3 - DIN Rail
RS Stock No. 708-1740
Mfr. Part No.GS2DB4
HK$960.96
Each
units
- - 4P - - - - A1 - Yes 20 A dc, 23 A ac 3 Wire Lead DIN Rail
RS Stock No. 518-7130
Mfr. Part No.3LD2250-0TK13
BrandSiemens
HK$283.37
Each
units
- - - - - - - - 10A - 32 A - - Panel Mount
RS Stock No. 781-3897
Mfr. Part No.38416021
BrandSocomec
HK$3,254.53
Each
units
- - 4P - - - - B1, B2 - Yes 200 A - Shroud DIN Rail
RS Stock No. 727-5787
Mfr. Part No.1SCA022709R9330
BrandABB
HK$3,755.18
Each
units
- - 3P - - - - B1-B2 - Yes 200 A 3 Screw DIN Rail
RS Stock No. 762-2446
Mfr. Part No.OS20TPN-B
BrandABB
HK$1,939.77
Each
units
- - 3P + N - - - - A1 - - 20 A 3 - Wall Mount
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