First Commissioning And Supervision Of Operation - ABB AMD Rg 355 Installation, Operation And Maintenance Instructions

Installation, operation and maintenance instructions
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High voltage flameproof motors for explosive atmosphere
AMD Rg 355-400-450-500

First commissioning and supervision of operation

GENERAL
The AMD Rg motors are certified to a minimum ambient
temperature of -55 °C without pre-heating.
Motors should be provided with the following types of
space heaters:
1. anticondensation space heater (as for standard
motors)
2. pre-heating space heaters, may be supply in
terminal box (optional and in specifically case) .
3. space heaters for terminal box heating: they are
only provided in case that special equipments are
fitted in the terminal box.
Remark: it is shown on the relevant auxiliary wiring
diagram when such special space heaters are in the
scope of supply.
In order to prevent condensation, the anti- condensation
space heater shall be switched on when the motor is idle.
If provided, pre-heating space heater in the terminal box,
it shall be fed when the ambient temperature is lower
than – 20°C
documentation).
FIRST STARTING
Start-up at ambient temperature lower than –20 °C (-
4°F) in case terminal box is provided with pre-
heating space heater .
Remark: the following applies not only to the first start,
but to every subsequent starts of the motor when the
ambient temperature is below –20°C (-4°F)
Switch on the pre-heating space heaters to ensure that
the temperature inside the terminal box is -20°C at least,
or at least temperature indicated in dedicated tag or in
separate document.
The time required to heat the terminal box will be given
by RTD's that measuring the terminal box inner air
temperature (see the auxiliary wiring diagram), the motor
start-up can be automatically set according to RTD's
measurement.
Just before starting, all the space heaters must be
switched off.
Test start
Before the first start-up of the motor check the correct
insertion of the dowel pins (if any) between the frame
feet and the basement.
After all devices, except the coupling to the driven
machine, have been connected, proceed to the first
starting.
(see related specific technical
Sheet No.
3AAM101035 E
Rev. B
Page 1 of 2
The first start should last only about one second. Check
that the direction of rotation is right and that there is no
obstacle deterring the free running of the machine. In
case of sleeve bearings, check that the stationary parts
do not absolutely go in contact with the rotating parts.
After this initial test, the machine can be started again
and can be run for longer time. Check the temperature
of the winding and the temperature and the correct
lubrication of the bearings. In case of sleeve bearings
check the oil level and the oil pressure.
When all the about mentioned procedure has been
made, connect the coupling to the driven machine and
proceed to the start of the complete shaft line. Check
again and frequently the temperature of the winding and
of the bearings.
If sensors into the bearings are not provided measure
the surface temperature in the bearing area. The bearing
working temperature is approximately the surface
temperature +10°C (50°F).
If the operation appears normal, the machine can be left
running and can be loaded.
Number of starts.
The maximum number of starts-up in a day or year, and
the maximum allowed number of sequential starts in cold
or warm conditions is a typical data of the motor,
depending on the design characteristics of the machine.
Details and information about this subject are reported
within the specific technical documentation.
The motor standard design allows a maximum of 3
successive starts from cold condition or a maximum of 2
successive starts from warm condition (steady state
temperature of the active parts at normal load). Refer to
the specific technical documentation for possible
different requirements.
Remember that too frequent and too many starts
accelerating the general ageing process of the active
components and cause a reduction of the motor
operating life. In particular too many successive starts
result in high temperatures and dangerous mechanical
stresses in the active parts of the machine.
01.2023
Issued by: MOLM