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ABB | SACE Emax 2

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YO-YC-YO2-YC2

(1)

: Connections

Further information is available on page 174, or on the website http://www.abb.com/abblibrary/

DownloadCenter/, where the wiring diagram is available 1SDm000091r0001.

Information on assembly is available on the website http://www.abb.com/abblibrary/DownloadCenter/, in

particular,

for E1.2 in the kit sheets:

• 1SDH000999r0502 for YO and YO2 coils

• 1SDH000999r0503 for coils YC

and for E2.2-E4.2-E6.2 in the kit sheets:

• 1SDH001000r0502 for YO and YO2 coils

• 1SDH001000r0503 for YC and YC2 coils

(1)

YC2 not available for E1.2

YU: Undervoltage coil

The undervoltage coil YU controls the value of the voltage in the circuit to which it is connected.

The coil opens the circuit-breaker when its energizing voltage drops below a value between 35...70%Un

The circuit-breaker can be reclosed when the coil energizing voltage is between 85...110% Un.

The undervoltage coil YU can in addition be used for the following purposes:

• Trip unit the circuit-breaker remotely using pushbuttons of the normally closed type.

• Activate the lock when the circuit-breaker is closed (the closing of the circuit-breaker is allowed only with

the undervoltage coil energized).

IMPORTANT:

• The undervoltage coil YU is incompatible with the presence of the Fail Safe device (UL

circuit-breakers).

• The undervoltage coil YU is a emergency trip unit. For service operations use the

opening coil.

NOTE: the power supply of the coil must be drawn on the supply side of the circuit-breaker

or from an independent source.

If the undervoltage coil trips, it is necessary, after having reset it, to wait at least 100 ms

before operating the closing coil.

YO 2

YU for E1.2

YO 2

YU for E2.2 - E4.2 - E6.2

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ABB SACE Emax E2.2 User Manual

Other manuals for ABB SACE Emax E2.2