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L2275
Emax UL
22/132
Doc. N°
Mod.
RH0109002
Apparatus
Scale
Page N°
Fig. 34a
Fig. 34b
CAUTION:
The undervoltage release (YU) is incompatible with the Fail Safe device (against racking-out with the springs charged).
When the Fail Safe device is present, remove it as shown in Figs. 34a-b-c-d.
Power supply (A)
24 V DC
30 V AC/DC
48 V AC/DC
60 V AC/DC
110-120 V A C/DC
125-127 V A C/DC
220-240 V A C/DC
250 V AC/DC
380-400 V AC
440-480 V AC
10.
Accessories
10.1
Electrical accessories
Shunt trip /closing coil (YO - YO2 - YC)
This allows remote opening or closing control of the apparatus. Given the power circuit breaker operating mechanism characteristics, opening
(with the power circuit breaker closed) is always possible, whereas closing is only possible when the closing springs are charged. Most of the
trip units can operate with either direct or alternating current.
This trip unit carries out an instantaneous service (*), but can be supplied permanently (**).
In the use where the closing coil is supplied permanently, to carry out the power circuit breaker reclosing operation after opening, it is necessary
to momentarily de-energize the closing coil (the power circuit breaker operating mechanism is, in fact, fitted with an antipumping device).
(*) In the case of instantaneous service, the minimum duration of the current impulse must be 100 ms.
(**) In the case of permanent power supply to the shunt trip, you must wait for a time of at least 30 ms before giving the opening control to the closing coil.
Reference figures in the electrical circuit diagrams: YO 4 - 5 - YC 2 3; YO2 8
Undervoltage release (YU)
The undervoltage release carries out power circuit breaker opening in the case of considerable lowering or lack of its power supply voltage. It
can be used for remote tripping (by means of normally closed type pushbuttons), as a lock on closing or to control the voltage in the primary and
secondary circuits. The trip unit power supply is therefore branched on the supply side of the power circuit breaker or from an independent source.
Power circuit breaker closing is only allowed with the trip unit supplied (the closing lock is carried out mechanically). Most of the trip units can operate
either with direct or alternating current.
Operating limits
(YO-YO2) : 70…110% Un
(YC) : 85…110% Un
Inrush power consumption (Ps)
DC = 200 W
Inrush power time ~100 ms
AC = 200 VA
Continuous power (Pc)
DC = 5 W
AC = 5 VA
Opening time (YO - YO2)
(max) 60 ms
Closing time (YC)
(max) 80 ms
Insulation voltage
2500V 50 Hz (for 1 min.)
Power supply (Un)
125-127 V AC/DC
220-240 V AC/DC
250 V AC/DC
380-400 V AC
440-480 V AC
Power supply (Un)
24 V DC
30 V AC/DC
48 V AC/DC
60 V AC/DC
110-120 V A C/DC
WHITE
OPEN