L3447
Emax DC
24/108
L3728
Doc. No.
Model
Apparatus
Scale
Page No.
1SDH000635R0002
Geared motor for automatic closing spring loading (M)
This automatically loads the circuit-breaker operating mechanism closing springs. After circuit-breaker closing, the geared motor immediately
sees to reloading the closing springs.
When there is no power supply or during maintenance work, the closing springs can still be loaded manually (by means of the special lever on
the operating mechanism).
Power supply (D):
24-30 V AC/DC
48 V AC/DC
60 V AC/DC
110-127 V AC/DC
220-250 V AC/DC
Adjustable opening time (YU+D):
0.5-1-1.5-2-3 s
Time delay device for undervoltage release (D)
The undervoltage release can be combined with an electronic time-delay device for installing outside the circuit-breaker, which enables a delay
in the tripping of the release with preset, adjustable times. The use of the delayed undervoltage release is recommended when the power supply
network of the release can be subject to power cuts or short-lived voltage drops, in order to avoid trips.
When it is not supplied, circuit-breaker closing is prevented.
The time-delay device has to be combined with an undervoltage release with the same voltage as the time-delay device.
Reference figures in the electrical circuit diagrams: YU + D; (7).
The characteristics of the time-delay device are:
Power supply
24-30 V AC/DC
48-60 V AC/DC
100-130 V AC/DC
220-250 V AC/DC
Operating limits:
85…110% Un
(CEI EN 60947-Standards)
Inrush power consumption (Ps):
DC = 500 W
AC = 500 VA
Rated power (Pn):
DC = 200 W
AC = 200 VA
Inrush time
0.2 s
Loading time:
4-5 s
Insulation voltage
2500 V 50 Hz (for 1 min.)
It is always supplied with limit contacts and microswitch for signalling closing springs loaded.
Reference figure in the electrical circuit diagrams: M (1)
