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ACCESSOR I ES
Remote resetting - YR Available on the XT7 M only, the YR reset coil permits the remote resetting of the circuit- breaker after tripping due to the protection unit.
General characteristics Power supply (Un)
AC
DC
24V
110V 220V
Operating limits
90%...110% Un
— Remote resetting
Opening and closing release test unit - YO/YC Test Unit The opening and closing release test unit helps ensure that the releases are running smoothly, to guaran- tee a high level of reliability in controlling circuit-breaker opening. The test unit ensures the service conti- nuity of the opening and closing releases with a rated operating voltage between 24V and 250V (AC and DC), in addition to verifying the functioning of the opening and closing coils electronic circuit. Continuity is checked cyclically at an interval of 30s between tests. The unit has optic signals via LEDs on the front, which provide the following information: POWER ON : correct power supply of the YO/YC Test Unit; OPEN ON : coil switch absent, power supply absent or insufficient, interrupted cables; SHORT ON : coil switch failure, short-circuited cables; OPEN and SHORT FLASHING : faulty coil switch or incorrect supply; OPEN and SHORT OFF : correct operation of the coil switch. Two relays with one change-over area are also available on board the unit, to allow remote signaling of the following events: Test failure - resetting takes place automatically when the alarm stops; Failure of three tests - resetting occurs only by pressing the manual RESET on the unit.
Devices characteristics Auxiliary power supply
24...250V AC/DC
Specifications of the signaling relays Maximum interrupted current
6A
250V AC
Maximum interrupted voltage
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