Electrical Connections - OLI MVE J Serie Handbuch

MVE
C

2.4 - ELECTRICAL CONNECTIONS

THE ELECTRICAL CONNECTION MUST BE CARRIED OUT BY QUALIFIED PERSONNEL ONLY
ACCORDING TO EN/IEC 60079-14 AND WITH THE POWER OFF.
THE EARTHING CONNECTION IS MANDATORY.
The power mains and the connection of the motovibrators must comply with current safety standards established by the relevant
authorities of the place where the activity is carried out.
Make sure the mains voltage matches the value reported on the rating plate on the motovibrator. Disconnect the line before conducting
any maintenance or when adjusting the exposed conductive parts.
For single-phase motovibrators wait at least one minute before opening the box with the electrical connections to let the capacitor
discharge. Any repair or replacement of components must only be carried out by qualified personnel only.
For single-phase motovibrators check that the capacitor used matches the data on the rating plate. It is always a good idea to provide for
the connection of the capacitor in a safe or non-classified area. If this is not possible, ensure the capacitor complies with:
- For the ATEX IECEX II 2D certification: ATEX II 2D (Directive 2014/34/EU), C22.1 art.18 CEC.
- For the Class II certification (Div.2): Class II Div.2 (NEC 500.5)
Use a flexible power supply cable with 4 conductors, one of which must be yellow-green (only green for the US) and used for earthing
purposes. When connecting the motovibrator to the line, the yellow-green earth cable (only green in the US) must always be longer to
prevent it from breaking first in the event of a failure.
The connection elements for the earthing and for the equipotential connection (Fig.7) must allow for the effective connection of at least
one conductor, whose cross-section must match the value reported in the table below. Motovibrators from size 60 to size 110 are fitted
with PTC 130°C thermistors. For the connection refer to diagrams M52 and M53. The protector model and other data are stamped on the
designated warning label on the vibrator itself.
If the cable gland is replaced(entries 1, and 2 on request Fig.11 ); the new one used MUST comply
with the certification level reported on the rating plate of the motovibrator. For dimension and
type refer to the TAB sec.
As well as complying with these requirements, the earthing connection elements and those for the equipotential connection, located
outside the electrical structure must allow for the effective connection of a conductor measuring at least 4 mm
Area with a cross-section of the phase conductors of the
installation S mm
S ≤ 16
16 < S ≤ 35
S > 35
FASTENING THE POWER SUPPLY CABLE TO THE TERMINAL BOARD
- Insert the power supply cable through the cable gland (Fig.8). The cable ends must be in the shape of a loop, pre-insulated and with
a hole suitable to the pins of the terminal board. We recommend using conductors of a suitable cross-section to avoid overheating.
Ensure there are no frayed parts that can cause a short-circuit. (Fig.9) The cable to be used depending on the model is shown in the
tables in the TAB section.
- The power supply cables must be contained in sponge cable ties. (Fig.9a)
- The connection to the terminal board must be carried out following the designated diagrams on page M.51 and in any case by always
following the specific diagram depending on the model inside the terminal board cover.
- Position the designated washers before the nuts, to prevent any loosening of the nuts themselves. (Fig.10)
- The nuts of the pins must be tightened to the torque reported in the table (Fig.7 page M.51).
- Remember to fasten the earthing cable (mandatory connection).
- Close the cover by placing the O-ring/gasket in-between.
- Tighten the cable gland so as to perfectly lock the power supply cable into place. (Fig.11) The tightening torque depends on the type
of cable used. The installer shall determine the right tightening torque as required. Incorrect tightening can alter the IP protection
level.
!
CM
US
Intertek
2
Area with a cross-section of the corresponding protective
conductor S mm
S
16
0.5S
!
2
M. 49
2 .
2
REV.01 | 01/2019