ABB SGF, Instruction Manual

Page: 119 / 156

6/16 1 HDU 05004-YN Rev. C
3 Optional Extras
(depending on customer’s order)
3.1 Additional Auxiliary switch contacts upto max. 16 contacts in any combination can be provided.
Please refer to schematic drawing submitted against order for details.
Blue Blue
Wrong
Black Black
Wrong
Blue Black
Right
Caution :-
Ensure Auxiliary switch elements positions are not
altered if removed for any maintenance. When
they are to be replaced, ensure that any two
elements of the same colour are not placed next to
each other. It is necessary to place elements of
blue and black colours alternatively.
3.2 Local control system, consisting of:
3.2.1 One changeover switch (29) (local - remote) and two push buttons (20) (ON, OFF) or,
3.2.2 One changeover switch (29) (local - OFF - remote) and two push buttons (20) (ON, OFF)
3.3 Blocking magnet (19) for preventing maloperation during manual emergency operation.
3.4 Adjustable thermostat for Heater (11 )
3.5 Interior lighting (48), with ON/OFF switch
3.6 Handle (35).
4 Method of Operation
4.1 Method of Mechanical Operation
The motor-operated mechanism is fitted with a spindle, mounted on bearings in a housing closed at the
sides. The motor (1 ) is below the spindle (2) and arranged parallel to it, with a two-step gear train (for
MT50) or three-step gear train (for MT100) between them. Power is transmitted to the output shaft (10)
from the spindle via a slide with two transmission bolts onto an operating cross, which in each of its end
positions is arrested by one of these bolts. When the end position has been reached, the slide is halted
by a cup-spring stop, without the operating position altering any further. On request, the manual
emergency operation feature can be protected against maloperation by means of a blocking magnet
(19). When the blocking magnet is de-energised, the manual emergency crank (18) cannot be
inserted.
Unauthorised removing of cover (15) for manual emergency operation is prevented by built-on padlock
on the door.
4.2 Method of Electrical Operation
The motor-operated mechanism is normally controlled from a control room or a local control cubicle,
using an ON or OFF command (minimum pulse duration 25 ms). The control contactor picks up and
remains in hold on position through self holding contact. The operating angle of the output shaft (10) is
190 degrees. When either of the end positions is reached, a limit switch (17) cancels the hold on and
terminates the switching operation. The limit switches are tripped by the operating cross on the output
shaft. In the case of AC operation, a rectifier (37) is installed upstream of the DC motor.
Release of the contactors via Auxiliary switch contacts is not permissible!
Auxiliary switches (3) are actuated by the control disc (13) fitted to the operating shaft (10). The position
signal meets the requirements of IEC Publication IEC62271-102, third edition and VDE standard 0670,