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Available for AC and DC power |
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Photodiodes for sensing light |
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The two output stages are triacs triggered via a pulse
transformer |
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Two separate relay outputs |
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A switch is included for selection of automatic relay
resetting |
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A digital display, visible through the window in the door, is
lighted when the triac outputs are activated and shows which
detector has caused tripping |
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Terminals are provided for connection of the arc monitor's own
power supply and for connections to the circuit-breaker trip
coil |
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The power consumption of the unit is approximately 6 watts |
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Has terminals for a number of different supply voltages |
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Connects to current transformers located at suitable positions
in the busbar system of the installation to be monitored |
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Incorporates a selector switch and potenti-ometer for testing
and checking purposes |
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Power consumption approximately 11 W |
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Optical signal transmission |
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Can be connected in series using optical cables |
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LEDs indicate when the current exceeds approximately 70% and
100% of the set value |
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The unit can be either 1, 2 or 3-phase connected (to one, two
or three current transformers) |
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Imposes insignificant load on the current transformers,
approximately. 0.7 VA, so current transformers that are also
applied for other purposes can often be used |
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