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
PHP1,927.57
Each
units
- - - - - - - - 10A - 32 A - - Panel Mount
New
RS Stock No. 203-1994
Mfr. Part No.3NP1123-1CA20
BrandSiemens
PHP2,481.75
Each
units
- Fused 3 SENTRON 3NP1123 - - NH000 160A - 160 A - - -
New
RS Stock No. 203-2271
Mfr. Part No.5TE8161
BrandSiemens
PHP1,621.68
Each
units
1 CO - 1 SENTRON 5TE - Enclosed - - - 20 A - - -
New
RS Stock No. 203-2109
Mfr. Part No.3NP1133-1CA10
BrandSiemens
PHP2,599.93
Each
units
- Fused 3 SENTRON 3NP1133 - - NH00, NH000 160A - 160 A - - -
New
RS Stock No. 203-1963
Mfr. Part No.3KD3034-2NE40-0
BrandSiemens
PHP8,075.55
Each
units
- Fused 3 SENTRON 3KD - - Size 2 100A - 100 A - - -
New
RS Stock No. 203-2381
Mfr. Part No.5TE8112
BrandSiemens
PHP1,792.38
Each
units
2 NO - 1 SENTRON 5TE - Enclosed - - - 20 A - - -
New
RS Stock No. 203-1976
Mfr. Part No.3NJ4103-3BF02
BrandSiemens
PHP3,630.71
Each
units
- Fused 3 SENTRON 3NJ4103 - - NH00, NH000 160A - 160 A - - -