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Thermal overload relays

Technical data 27

Installation

RSTN1 , RSTN2 , RSTN3 Panel RSTN4 , RSTL1 , RSTL2
Terminal for contactor coil Setting current adjusting scale RESET button (blue)H - manual A - automatic Switch position indicator (green) Tripping of a manual-resetting relay is indicated by a pin projecting from the front-plate Test button (red) Auxiliary contacts terminals Main circuit connection terminal No. It must correspond with terminal No. of contactor In case of separate mounting of RSTL, the set current must be set on the scale against the reference mark 2.Set the scale to the rated current of the load.3.If the reset button points to H (manual) and the relay has been tripped, pressing the button puts the relay in operation again.Changing to automatic reset by pressing and turning the button anti-clock wise from H to A.4.When the test button is actuated, the NC contact opens and the NO contact closes, therefore the auxililary circuit(simulation of overload tripping) can be tested. In the “manual” position, the relay is resetted when the blue reset buttonis pressed. In the “automatic” postion, the relay is reset automatically. In the automatic mode, there is a riskof self-switching when the button is released.5.Mounting and operating position, the relays are shown in drawings. 1.Marks on panel (marks on thermal overload relays). Thermal overload relaywith CRNI contactor. Panel Thermal overload relaywith relay base or box terminal block- for installing as a single unit.Tripping relayto be installed as a single unit.
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