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MDE/C133 2561 001
MX3IPG2A
7. APPLICATION AND USE
The device is suitable to detect the ground rotor faults for
synchronous machines.
It is also suitable to monitor direct voltage (Vaux)
8. INSTALLATION - TRANSPORT
8.1 ESD Electrostatic charges
The relay uses electronic components that are highly sensitive
to electrostatic charges. Therefore, the operator who happens
to handle the moving part of the equipment and come in contact
with the electronic circuits, must take preventive measures to
avoid damaging the relay:
- before removing the movable part, the operator must reach
the same potential as the equipment by touching the case
- avoid touching electronic components, printed circuit
boards and connectors, as far as this is possible. Handle
it by using the mechanical frame.
- lay the device on surfaces that are antistatic or feature the
same potential as the operator's.
- only store and transport the relay by using the special
antistatic bag.
Special electronic devices require the operator and the unit to
be both grounded along with any measuring instrument, when
this is possible.
As far as the following action is possible and reasonable, do
not pull out the moving part from the casing to avoid causing
mechanical and electrostatic damages to the protection.
8.2 Acceptance - storage
Although protective relays are generally of robust construction,
they require a careful treatment prior to installation on site,
since they must be carefully packed and unpacked, without
applying any force and using suitable tools.
Once supplied, the relays must be thoroughly inspected to
ensure that they have not undergone shipping damages.
If the relays are not immediately installed upon reception, they
must be stored in places free from dust and moisture, in their
original packing.
Storage temperature: -25°C + 80°C.
8.3 Assembling and connection
- Remove the protective cover until the four fastening holes
become visible.
- Place the equipment into the hole of the panel-board and
secure it by fastening the four screws (see fig. 6)
- Connect the ground screw of the equipment to the protection
ground of the panel-board using connectors of suitable gauge
(>4mm
2
) and as short as possible (<1m).
- The connections must be made through the screw or Faston
connections of the interface terminal blocks. In the event of
Faston wiring, the cover that provides the terminal block with
the IP20 protection class must be placed before the Faston is
connected to the relay. In the event of screw wiring, the side fins
of the IP20 cover that correspond to the wired terminals must
be removed or folded.
The assembling and wiring must be carried out according to
the best workmanship.