SACE TMAX XT UL/CSA LOW VOLTAGE MOLDED CASE C I RCUI T- BRE AKERS UL4 89 AND CSA C2 2 . 2 STANDARDS
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— Residual current protection
SACE RCQ020 panel type residual current release SACE Tmax XT circuit-breakers can also be used in conjunction with RCQ020 panel type residual current re- leases with a separate toroid to be installed on the line conductors (“/A” indicates the necessity for an aux - iliary power supply). Thanks to its wide range of settings, the panel release is suitable for: • applications where the installation conditions are particularly restrictive, such as for circuit-breakers that are already installed or where there is limited space in a compartment where the circuit-breaker is installed; • creating a residual current protection system coordinated at various distribution levels, from the main switchboard to the end user; • where residual current protection with low sensitivity is required, e.g. in partial (current) or total (time) selective chains; • highly sensitive applications (physiological sensitivity) for protecting people against direct contacts. Thanks to the 115-230...415V external auxiliary power supply, the RCQ020 panel type residual current de- vice is able to detect current leakages from 30mA to 30A and to act with a trip time that can be adjusted from instantaneous to a delay of 5s. The opening mechanism is an indirect action type and acts on the cir- cuit-breaker release mechanism by means of the shunt opening or an undervoltage release of the cir- cuit-breaker itself. The opening command to the circuit-breaker (trip delay) can be temporarily inhibited, and the circuit- breaker can be opened by remote control by means of the RCQ020 device. The following equipment must be requested when ordering: • the RCQ020 device itself; • an opening coil (SOR) or an undervoltage release (UVR) of the circuit-breaker to be housed in the relative slot made in the left pole of the circuit-breaker itself; • a closed toroid, which can be used for both cables and busbars, with a diameter from 60mm to 185mm. Signals available: • LED to indicate the status of the residual current device (supplied or not supplied). The RCQ020 is equipped with a positive safety function thanks to which the RCQ020 sends an automatic circuit-breaker opening command in the absence of auxiliary voltage; • LED for fault signaling; • LED for signaling tripping of the residual current device; • electrical pre-alarm/alarm/trip signals.
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