ABB SGF, Instruction Manual

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1 General remarks
Practical experience has shown that strict adherence to the recommendation of this instruction manual
will ensure the best possible safe performance of the equipment.
In an instruction manual it is not possible to cover every possible eventuality that might occur when
using technical apparatus. It is therefore requested that all incidences, in particular those for which the
instruction manual provides no plausible explanation, be reported to us directly or through our local
representatives.
These instructions are based on the present technical design. We reserve the right to make any
technical changes without prior notice.
We cannot accept any responsibility for damage resulting directly from incorrect handling or operation,
irrespective of whether specific reference is to be found in the instructions for erection and operation or
not.
With respect to this document we reserve all rights also in the event of a patent being issued and
registration being made under other commercial rights. Misuse, in particular copying and handing over
to third parties is prohibited and offenders can be prosecuted under civil and criminal law.
2 Design
The motor-operated mechanisms type MT50 and MT100 are designed for outdoor installation and
used for the electrical remote operation of disconnectors and earthing switches.
All components of the operating mechanism are installed in a polyurethane painted aluminium housing
(12) with a door (12a) at the front. Power transmission from the motor (1) to the operating spindle (2) is
via a gear train.
The control components are attached to a mounting plate (4) and wired to the terminal strip (5). The
length of the terminal strip support is designed to accommodate the maximum equipment
configuration. The terminal designations are consistently structured, i.e. the same terminal
designations are used for the same function in all possible versions.
A clearance of approx. 10 cm is provided for connecting the control cables to the terminal strip.
The connections to motor (1), limit switches (17), (if included) blocking magnet (19) are routed via a set
of terminals (27).
The basic version includes the fallowing:
- a contactor control with self holding interlock scheme
- an 8-pole Auxiliary switch with 4NC + 4NO contacts, Switching capacity of each contact is 2 A at
220 V DC, at T=20 ms.
2 2
Cross sectional area for all internal connections is 1.5 mm (except for motor which is 0.56 mm )
flexible, grey for DC & Auxiliary switch wiring and black for AC wiring. All Auxiliary switch contacts are
wired upto terminals. In the case of AC operation, a rectifier (37) is installed upstream of the DC motor.
The door and the housing are connected with cable (26) to earth connection and angle. The incoming
and outgoing cables are passed from below through a 3 mm thick removable cable entry plate (9) made
of aluminium. Cable glands are not included in the standard scope of delivery, and must be provided by
the customer. An anticondensation heater (11) permanently connected to the voltage supply is
mounted on the mounting plate.
2.1 Manual Emergency Operation
Crank (18), which can be inserted into the auxiliary pin (8) for emergency operation, serves for
adjusting the unit and performing emergency operations. It is not permitted to use a drilling machine
instead of the emergency crank. The corresponding opening provided on the housing is closed by
cover (15). When the manual emergency crank is inserted into the auxiliary pin a safety contact (14)
interrupts the control circuit for the motor to ensure that actuation is possible only by using the
emergency crank.
The opening for manual emergency operation is located approx. 250 mm below the top edge of the box
on the right-hand side. It is sealed with a cover (15) incorporating bayonet lock.
1 HDU 05004-YN Rev. C