Isolation Switches

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DC & AC switches for isolating generation & loads.

DC Isolators

These are used between high voltage DC PV arrays and grid-connect inverters. They are located adjacent to the inverter and are required to provide a means of manually isolating the entire PV array during system installation or any subsequent maintenance.  The switch must be rated for system voltage (1.15 x string open circuit voltage Voc) and current (1.25 x string short circuit current Isc). 

AC Isolators

These are required to provide a means of manually isolating the AC supply to a grid-connect inverter. Two AC isolation switches may need to be provided between the inverter and the point of connection to the supply. One adjacent to the inverter and one adjacent to the consumer unit (Only one is needed if in the same room). The one adjacent to the consumer unit must be readily accessible and capable of being locked in the off position only. Switches must be double pole and suitably labelled. 

Kraus & Naimer DC Isolation Switches

Cost effective switches with a simple easy to install design.

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Product Code Description Retail Price
(ex VAT)
PV-SW20/650V 2 pole DC isolator 20A @ 650VDC £27.98
PV-SW20/1000V 2 pole DC isolator 20A @ 1000VDC, 30A @ 660V, 50A @ 375V £41.04
PV-SW-2-20/660V 4 pole (2 string) DC isolator 20A @ 660VDC £40.24
PV-SW25/800V 2 pole DC isolator 25A @ 800VDC £62.37
PV-SW32/800V 2 pole DC isolator 40A@800VDC 28A@1000VDC £78.50

Kraus & Naimer AC Isolation Switches

Three and four pole (for three phase) single throw switches lockable in the off position only, mounted in enclosure. Rated: 230/400 Vac. 

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Product Code Description Retail Price
(ex VAT)
AC-SWI Single phase 20A AC isolator switch in enclosure £22.46
AC-SW2 Single phase 32A AC isolator switch in enclosure £24.21
AC-SW3 Three phase 25A AC isolator switch in enclosure £27.74
AC-SW4 Single phase 40A AC isolator switch in enclosure £37.10
AC-SW5 Three phase 40A AC isolator switch in enclosure £41.55
AC-SW7 Three phase 80A AC isolator switch in enclosure £71.55

Santon Silios D DC Isolators

The Santon Silios D range of true DC isolators.

Switch
  • Proven Santon 'Snap-action' mechanism
  • Reliable X-type switch
  • Switch disconnection within 3ms
  • Self cleaning blade wiping contacts
  • Available in 2 pole and 4 pole
  • Maximum cable size 4mm and 6mm
  • IEC 60947 certified
Enclosure
  • UV resistant
  • IP65
  • Black padlockable knob
  • Lid only removable in the ‘OFF’ position
  • M16 knock outs
  • Easy terminal access
Santon Silios D DC Isolator With Knock Outs
Santon Silios D DC Isolator
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Product Code Description Retail Price
(ex VAT)
PV-SW25/750V Santon Silios 2 pole DC isolator 25A @ 750VDC, 16A @ 1000VDC £27.10
PV-SW-2-25/750V Santon Silios 4 pole DC isolator 25A @ 750VDC, 16A @ 1000VDC £33.21

Santon Aesthetic AC Isolator

The first main AC isolation switch specifically designed for domestic PV installations. With a cosmetically pleasing appearance rather than looking industrial it allows installation in any convenient position rather than having to be located out of sight.

Santon AC isolator in aesthetically pleasing consumer unit look-alike enclosure. Specially designed cable entry systems to enhance speed of installation and maintain cosmetic appearance. Saves installation time and space.
All the required labeling is moulded into the switch to maintain cosmetically pleasing appearance.

Santon AC Isolator DSS-A-W
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Product Code Description Retail Price
(ex VAT)
DSS-A-W 2 pole, 20A 600V AC switch enclosed for Wall Mounting £22.46

Santon Combined AC & DC Isolator + Optional Generation Meter

Save space, installation time and money with this combined AC and DC isolator. 1 string and 2 string options available and an Elster A100 generation meter can also be included.

  • Multi Contact Type 4 connectors (MC4) for simple, safe solar and inverter connection
  • Can only be switched in the correct order for safer operation (On: DC then AC; Off: AC then DC)
  • Integrated warning so no need to labels
  • Lockable in the off position only
Santon DSS-2DAM Combine AC and DC Isolator and Generation Meter
Santon DSS-2DA Combine AC and DC Isolator Santon DSS-2DAM Combine AC and DC Isolator and Generation Meter Open
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Product Code Description Retail Price
(ex VAT)
DSS-2DA 2 pole, 25A 600V DC and AC Isolator £79.64
DSS-2DAM 2 pole 25A 600V DC and AC Isolator with meter £125.37
DSS-4DA 4 pole 25A 650V DC switch (two strings) 2 pole 20A AC switch £90.69
DSS-4DAM 4 pole, 25A 600V DC & AC Isolator with meter £136.42