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. 518-7130
Mfr. Part No.3LD2250-0TK13
BrandSiemens
HK$426.49
Each
units
- - - - - - - - 10A - 32 A - - Panel Mount
New
RS Stock No. 212-5815
Mfr. Part No.3LD3340-0TL11
BrandSiemens
HK$796.32
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5717
Mfr. Part No.3KD2830-0NE20-0
BrandSiemens
HK$836.81
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5718
Mfr. Part No.3KD2830-2NE20-0
BrandSiemens
HK$928.17
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3281
Mfr. Part No.3KF5380-0LF11
BrandSiemens
HK$15,287.08
Each
units
- Fused 3 SENTRON 3KF - - NH2, NH3 - - 800A - - -
New
RS Stock No. 212-5816
Mfr. Part No.3LD3350-0TL11
BrandSiemens
HK$613.59
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3181
Mfr. Part No.3KD3040-2NE10-0
BrandSiemens
HK$1,559.08
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 100A - - -
New
RS Stock No. 218-3166
Mfr. Part No.3KD2640-2ME10-0
BrandSiemens
HK$927.35
Each
units
- Fused 4 SENTRON 3KD2 - - - - - 63A - - -
New
RS Stock No. 212-5727
Mfr. Part No.3KD3630-0NE20-0
BrandSiemens
HK$1,941.48
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3182
Mfr. Part No.3KD3040-2NE20-0
BrandSiemens
HK$1,559.08
Each
units
- Fused 4 SENTRON 3KD3 - - - - - 100A - - -
RS Stock No. 203-2109
Mfr. Part No.3NP1133-1CA10
BrandSiemens
HK$411.14
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5719
Mfr. Part No.3KD2832-0NE10-0
BrandSiemens
HK$1,204.34
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3216
Mfr. Part No.3KD4040-0PE20-0
BrandSiemens
HK$4,363.40
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 315A - - -
New
RS Stock No. 212-5786
Mfr. Part No.3LD2213-0TK51
BrandSiemens
HK$642.66
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5725
Mfr. Part No.3KD3430-2NE20-0
BrandSiemens
HK$1,764.98
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 212-5722
Mfr. Part No.3KD3230-2NE10-0
BrandSiemens
HK$1,567.72
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 218-3233
Mfr. Part No.3KD5040-0RE10-0
BrandSiemens
HK$21,563.89
Each
units
- Fused 4 SENTRON 3KD4 - - - - - 1000A - - -
RS Stock No. 202-7126
Mfr. Part No.5SG7611-0KK16
BrandSiemens
HK$168.664
Each (In a Pack of 12)
units
- - - - - - - - - - - - - -
New
RS Stock No. 216-3428
Mfr. Part No.3VA1163-1AA36-0AA0
BrandSiemens
HK$2,237.38
Each
units
- Non-fused 3 0AA0 3VA11 - Enclosed - 63A - 63A - - -
New
RS Stock No. 218-3253
Mfr. Part No.3KF1306-4RB11
BrandSiemens
HK$1,994.41
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 63A - - -