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Solar Isolators SI are switch gears for interupting the DC/AC-Inverter from the solar-panels. Photovoltaic-installations have to be equipped with DC-isolators according to IEC 60364-7-712.Switch Disconnectors SI ensure a reliable switching up to 32A with 1000V in the category DC21B. The construction of the contacts and the material selection guarantee that no oxidation (small switching frequency) develops, and is thus prevented inadmissible heating-up. The switching speed at the manually operated handle does not have an effect on the switching attitude of the contacts.

- IP65 rated enclosure
- Specifically developed for solar installations
- Knife switch contacts and arc cooling chambers
- High reliability rotary snap action mechanism
- High speed trigger ratchet switching (5ms max)
- Operator independent switching speed
- Maximum 1Nm torque for easy operation
- 16mm2 box terminals for easy wiring
- Top, bottom M20/25 and rear cable entry

Type DC21B DC22B
500V 600V 700V 800V 900V 1000V 500V 600V 800V 1000V
SI25 .. 2 poles in series 25A 25A 23A 20A 16A 11A 8A 6A 2.5A 1.5A
2 poles in series+2 parallel 45A 45A 23A 20A 16A 11A - - - -
4 poles in series 25A 25A 25A 25A 25A 25A 25A 25A 12A 9A


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