ABB SDCS-AMC-CLAS2 After sales service is provided for the control card of the power supply device

Description

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Opening and closing release test unit – YO/YC Test Unit
The opening and closing releases test unit helps ensure that the various version of releases are
running smoothly, to guarantee a high level of reliability in controlling circuit-breaker opening.
The test unit ensures the continuity of the opening and closing releases with a rated operating
voltage between 24V and 250V (AC and DC), as well as verifies the functions of the opening
and closing coil electronic circuit.
Continuity is checked cyclically with an interval of 20s between tests. The unit has optic
signals via LEDs on the front, which provide the following information:
POWER ON: power supply present
TESTING: testing in progress
TEST FAILED: signal following a failed test or lack of auziliary power supply
ALARM: signal given following three failed tests.
Two relays with one change-over area also available on board the unit, to allow remote
signalling of the following events:
Failure of a test – resetting takes place automatically when the alarm stops
Failure of three tests – resetting occurs only by pressing the manual RESET on the unit.
Charachteristics of device
Auxiliary power supply 24V…250V AC/DC
Specification of the signalling relays
Maximum interruped current 6A
Maximum interrupted voltage 250V AC