The use the delayed undervoltage release recommended when the power supply
network the release can subject power cuts short-lived voltage drops, order avoid trips.lta (D)
The undervoltage release can combined with electronic time-delay device for installing outside the circuit-breaker, which enables delay
in the tripping the release with preset, adjustable times.
Reference figure the electrical circuit diagrams: (1)
Model 2234 Apparatus Scale
L 2778
Doc-Na 1SDH000460R0002
Page No.
When not supplied, circuit-breaker closing prevented.5-1-1.)
It always supplied with limit contacts and microswitch for signalling closing springs loaded.
The characteristics the time-delay device are:
Power supply (D): 24-30 AC/DC
48 AC/DC
60 AC/DC
110-127 AC/DC
____________________________________ 220-250 AC/DC
Adjustable opening time (YU D): 0.
25/158
.2 s
Loading time: 4-5 s
Insulation voltage 2500 (for min.
Power supply 24-30 AC/DC
48-60 AC/DC
100-130 AC/DC
220-250 AC/DC
Operating limits: (CEI 60947-Standards)
Inrush power consumption (Ps): 500 W
AC 500 VA
Rated power (Pn): 200 W
AC 200 VA
Inrush time 0. After circuit-breaker closing, the geared motor immediately
sees reloading the closing springs.
When there power supply during maintenance work, the closing springs can still loaded manually (by means the special lever on
the operating mechanism).
The time-delay device has combined with undervoltage release with the same voltage the time-delay device.5-2-3 s
G tic rin )
This automatically loads the circuit-breaker operating mechanism closing springs.
Reference figures the electrical circuit diagrams: (7)
