62
UTD.123.2019-10.00_EN
Installation and maintenance
Fit the coupling with sliding probe into the appropriate threaded hole of the gear reducer (for the position
refer to SPT scheme attached to present operating instructions) by using a spanner key 24, loosen the
hexagon using a 19 mm spanner and slide the probe of the thermometer in (up to the point of contact when
the temperature of a bearing is to be measured) so that the head of the thermometer is closer to gear
reducer.
The electrical connections must be made with copper shielded “twisted” wires separated from power
cables. Internal and external earth connection to be made.
The body of the thermometer must be protected against all risks of damage.
Connect the sensor to a temperature control device with 2 operating threshold or similar device.
Periodically verify that:
– there is no erosion/corrosion of the gaiter
– the whole equipment is working efficiently by inserting into the circuit a resistance of a known value and
simulating a known temperature.
Attention! Assemble
and
disassemble the sensor with gear reducer without oil.
Setting
2 operating thresholds
are foreseen:
–
Alarm
: anormal temperature increase; consult the table 14.1 and identify the possible over-heating
causes; when no operation is possible, start the procedure of machine block.
–
Block
: achieving the maximum temperature allowed; start immediately the procedures of machine
block, exclude the gearmotor from supply; consult table 14.1 and execute the controls of table 14.3.
Unless otherwise stated in the eventual supplementary documentation attached to present operating
instructions, proceed as follows:
Setting of
oil temperature probe
At the end of commissioning (see ch. 12) when gear reducers or gearmotors reach a steady thermal condition
measure the oil temperature
T
oil
and ambient temperature
T
amb
and set the operating temperature (alert)
of the device connected with the oil probe at the lowest temperature between the following two:
–
T
calculation
=
T
oil [°C]
–
T
amb [°C]
+
45
[°C]
–
T
alert
=
85
[°C]
The
machine block
temperature cannot exceed
T
stop
=
100
[°C].
Setting of
bearing temperature probe
Set the operating temperature (alert and block) of the device connected to bearing probe as follows:
–
T
alert
=
100
[°C]
–
T
stop
=
110
[°C]
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