Franz Eisele u. Söhne GmbH & Co. KG
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3.5
Modification to the Product
Unauthorised modifications to the product may negatively affect the safety, service life or function of
the product. All changes that are not described in the product documentation are not permitted.
For reasons of safety, no unauthorised modifications may be undertaken! All planned modifications
must be authorised in writing by the manufacturer.
Arbitrary, unauthorised modifications to the product lead to the loss of warranty claims, invalidate the
enclosed manufacturer or installation declarations and increase the risk of damage.
3.6
Electrical Protection and Monitoring Equipment
Fault Current Switch (RCD):
A fault current switch (RCD) with a rated leakage current of maximum
30 mA
is to be installed by the
user for every individual submersible motor pump, in addition to the prescribed fuse protection. In the
case of a fault, this RCD should activate all power circuits, incl. leakage control and thermal sensor.
Motor Protection:
When using motor protection switches with only bimetal trips, no reliable shutdown is guaranteed for
overheating, i.e. the thermal contacts integrated in the submersible motor are definitely to be looped
into the control circuit via an ATEX approved tripping unit.
Thermal Monitoring:
Thermal contacts are installed in the submersible motor for monitoring the temperature. That ensures,
that with defective motor cooling a reliable shutdown takes place. If no switch/ no control system of
Eisele is in use, in addition a motor protection switch/motor protection relay must be used. The motor
protection switch/ motor protection relay must be temperature-compensated and phase-failure
sensitive. The motor can only be switched on again after it has cooled down and the cause of the fault
has been eliminated.
Leakage Control:
A sensor is mounted in the oil chamber, which signals the ingress of fluid by means of a signal lamp of
the evaluation electronics (on the switch or in the control system).
If signalled
: Carry out an oil change and check the motor compartment. If the signal lamp lights up
again, the mechanical seal must be replaced.
Attention:
This leakage control is a very important component, in order to ensure the function of the
submersible motor pump. At the same time it is an item of operating equipment that helps to ensure the
observance of the protection objective. It is not permitted to put the device into operation without
leakage control. Its function is to be checked and assured during commissioning, as well as monitored
at regular short intervals. The evaluation electronics necessary for this is available as an accessory.
