SPDs protect equipment by limiting the surge voltage to which the equipment is exposed. At the same time, they divert dangerous surge currents, e.g. those due to direct lightning strikes, to earth and away from sensitive equipment. In simple terms, an SPD may be seen as a switch between mains and earth. Normally, the switch is open and the SPD does not affect the operation of the equipment in any way. Only when a sufficiently high surge appears across its terminals does the switch close and divert the surge away from the equipment.
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Type
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QFL
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QKL
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Maximum Continuous Operating Voltage (Uc)
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|
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Voltage Protection level (Peak) (Up)
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1.5kV
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1.5kV
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Nominal Discharge Current (Inom) (In)
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5 kA (8/20 μs)
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20 kA (8/20 μs)
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Maximum Discharge Current (Imax)
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10 kA (8/20 μs)
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40 kA (8/20 μs)
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Short Circuit Withstand
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2.5 kA (50 Hz)
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5 kA (50 Hz)
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Lightning Protection Zone
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OB to 1 or 1 to 2
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OB to 1 or 1 to 2
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SPD Class
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Class II
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Operating Temperature Range
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-40 °C to +85 °C
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Mounting Options
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Dual mounting (DIN & Mini), DIN Rail
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Weight
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142g per pole
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Humidity
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35 to 85% relative
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