Time Delay Device For Undervoltage Release (D); Geared Motor For Automatic Closing Spring Loading (M) - ABB SACE Emax Series Installation, Service And Maintenance Instructions

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 (D):
Adjustable opening time (YU+D):

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
Operating limits:
Inrush power consumption (Ps):
Rated power (Pn):
Inrush time
Loading time:
Insulation voltage
It is always supplied with limit contacts and microswitch for signalling closing springs loaded.
Reference figure in the electrical circuit diagrams: M (1)
L2234
Model
L2778
24-30 V AC/DC
48 V AC/DC
60 V AC/DC
110-127 V AC/DC
220-250 V AC/DC
0.5-1-1.5-2-3 s
24-30 V AC/DC
48-60 V AC/DC
100-130 V AC/DC
220-250 V AC/DC
85...110% Un
(CEI EN 60947-Standards)
DC = 500 W
AC = 500 VA
DC = 200 W
AC = 200 VA
0.2 s
4-5 s
2500 V 50 Hz (for 1 min.)
Apparatus
Doc. No.
1SDH000460R0002
Scale
Emax
Page No.
25/158