3 The most important technical data Ideal solution for DC applications G20S/G20 DC-Switch with knife contacts The most important technical data, according to IEC/EN 60947-3 Rated Insulation Voltage Ui 690 V AC Rated Insulation Voltage Ui 500 V DC Rated Insulation Voltage Ui 1000 V AC* Rated Thermal Current lu/lth 20 A * DC possible with series connection Maximum permissible wire gage mm2 AWG Single-core or stranded wire 2 x 2,5 12 Flexible wire 2 x 2,5 12 with sleeving in according with DIN 46228 2 x 2,5 – Ambient Temperature between –5 °C and +40 °C General Use G20S 150 V DC 20 A 300 V AC Pilot Duty 10 A B 300a / USA 1 IEC/EN 60204 – European standard for electrical, electronic and programmable electronic equipment and systems. 2 EN 50274 – European standard for low-voltage switchgear and controlgear assemblies for protection against electric shock and against unintentional direct contact with hazardous live parts. 3 IEC/EN 60947-3 – European standard for switches, disconnectors, switch disconnectors and fuse-combination units to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1000 V AC or 1500 V DC. The G20S and G20 switch disconnectors of the Kraus & Naimer G-series are compact, robust, and perfectly suited for direct current (DC) applications, as well as for low voltages and low currents. The G20S switches are manually operated, have a switching capacity of 1000 V/20A (DC-22A), and a high shortcircuit resistance. The directly operated G20 switches fulfill all the characteristics of a main switch according to IEC/EN 602041. The G20 switches are the ideal solution not only for DC applications but also for AC applications with high shortcircuit resistance, as well as for systems operating at low voltage and currents. In compliance with EN 502742, the IP20 finger-safe terminals prevent accidental unintentional contact with live parts. In accordance with IEC/EN 60947-33 our G20 and G20S switch disconnectors ensure the reliable operation of contacts when opening and closing. For details, please see the table on the right. Of course, the G-series can also be flexibly combined with many Kraus & Naimer extras, e. g. padlock devices.
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