Yu: Undervoltage Coil - ABB SACE Emax 2 Installation, Operation And Maintenance Instructions For The Installer And The User

YU: undervoltage coil

D1
D2
YU
YO2
75 | © 2017 ABB | 1SDH000999R0002 - ECN000058721 - Rev. B
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.
The tables listing the available voltages and the electrical characteristics are provided below:
Available voltages (Un)
24 V AC/DC
30 V AC/DC
48 V AC/DC
60 V AC/DC
110...120 V AC/DC
220...240 V AC/DC
240...250 V AC/DC
277 V AC/DC
380...400 V AC
415...440 V AC
480...500 V AC
YU: Connections
Further information is available on page 59, or on the site http://www.abb.com/abblibrary/DownloadCenter/,
where the wiring diagram is available 1SDM000091R0001.
Diagram 73
Information on the assembly is available on the web site http://www.abb.com/abblibrary/DownloadCenter/,
in particular with the kit sheet 1SDH000999R0504.
General characteristics
Inrush power (Ps)
Continuous power (Pc)
Opening time
73
+
~
A4
SO
X
D1
XV
D1
A1
XB5 1
YU
XB5 2
XV
D2
X
D2
-
A4
~
Electrical accessories | 1 - Electrical control accessories
ABB | SACE Emax 2
YU
300 VA/W
3.5 VA/W
50 ms