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. 781-3897
Mfr. Part No.38416021
BrandSocomec
HK$3,561.93
Each
units
- - - - - - - - - - - - - -
RS Stock No. 499-7201
Mfr. Part No.78640548 & T0-2-8900/E/EZ-P1(RS499-7201)
BrandEaton
HK$245.08
Each
units
- - - - - - - - - - - - - -
RS Stock No. 762-2446
Mfr. Part No.OS20TPN-B OS20TPN-B
BrandABB
HK$2,054.18
Each
units
- - - - - - - - - - - - - -
RS Stock No. 727-5787
Mfr. Part No.OS200B03P 1SCA022709R9330
BrandABB
HK$3,976.67
Each
units
- - 3P - - - - B1-B2 - Yes 200 A 3 Screw DIN Rail
New
RS Stock No. 213-8458
Mfr. Part No.57035013
BrandSocomec
HK$1,726.28
1 Box of 2
Box(es)
- Fused 3 - RMS 3P Enclosed 22 x 58mm 125A - 125A - - -
RS Stock No. 781-3831
Mfr. Part No.3831 6010
BrandSocomec
HK$2,282.66
Each
units
- - - - - - - - - - - - - -
RS Stock No. 820-012
Mfr. Part No.100KXTNC2F
BrandEaton
HK$9,380.09
Each
units
- - 3P - - - - - - - 100 A 3 - -
New
RS Stock No. 213-1377
Mfr. Part No.3LD2130-0TK13
BrandSiemens
HK$322.29
Each
units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 2 25A - 25A - - -
New
RS Stock No. 212-5801
Mfr. Part No.3LD2866-0TB51
BrandSiemens
HK$4,350.89
Each
units
- - - - - - - - - - - - - -
RS Stock No. 172-3018
Mfr. Part No.36153016
BrandSocomec
HK$3,022.42
Each
units
NO/NC, 2NO/2NC - 3 FUSERBLOC - - - 00 160A Yes 160 A 3 Cage DIN Rail
RS Stock No. 781-3834
Mfr. Part No.3831 3011
BrandSocomec
HK$2,144.51
Each
units
- - - - - - - - - - - - - -
RS Stock No. 184-9087
Mfr. Part No.CPDB1K
BrandContactum
HK$180.35
Each
units
- - - - - - - - - - 200 A 3 - -
New
RS Stock No. 218-3252
Mfr. Part No.3KF1306-2LB11
BrandSiemens
HK$2,546.08
Each
units
- Fused 3 SENTRON 3KF - - NH00, NH000 - - 63A - - -
New
RS Stock No. 213-1383
Mfr. Part No.3LD2830-0TK11
BrandSiemens
HK$1,342.87
Each
units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 4 125A - 125A - - -
New
RS Stock No. 212-5811
Mfr. Part No.3LD3250-0TL11
BrandSiemens
HK$483.43
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 211-0195
Mfr. Part No.5SG7631-0KK06
BrandSiemens
HK$518.885
Each (In a Pack of 4)
units
- Fused 3 MINIZED 5SG - - D01 0.3A - 6A - - -
RS Stock No. 710-0570
Mfr. Part No.OS63GB03P 1SCA115235R1001
BrandABB
HK$1,681.04
Each
units
- - 3P - - - - A2, A3 - Yes 63 A 3 Screw DIN Rail
New
RS Stock No. 218-3283
Mfr. Part No.3KF5380-2LF11
BrandSiemens
HK$16,973.85
Each
units
- Fused 3 SENTRON 3KF - - NH2, NH3 - - 800A - - -
RS Stock No. 781-3816
Mfr. Part No.3831 6005
BrandSocomec
HK$1,480.05
Each
units
- - - - - - - - - - - - - -
New
RS Stock No. 213-1378
Mfr. Part No.3LD2244-0TK53
BrandSiemens
HK$713.33
Each
units
3P Non-fused 3 SENTRON 3LD Single Throw Enclosed Size 2 32A - 32A - - -