Connecting To Power Supply; Preparing The Connection - Vega VEGAMIP T61 Operating Instructions Manual

5 Connecting to power supply

Safety instructions
Voltage supply
Connection cable
Cable glands
14
5 Connecting to power supply
5.1

Preparing the connection

Always keep in mind the following safety instructions:
•
Carry out electrical connection by trained, qualified personnel
authorised by the plant operator
•
If overvoltage surges are expected, overvoltage arresters should
be installed
Warning:
Only connect or disconnect in de-energized state.
Connect the operating voltage according to the connection diagrams.
The electronics module is designed in protection class I. To maintain
this protection class, it is absolutely necessary that the earth conduc-
tor be connected to the inner earth conductor terminal. Keep the
general installation regulations in mind. Take note of the correspond-
ing installation regulations for hazardous areas with Ex applications.
The data for power supply are specified in chapter "Technical data".
The instrument is connected with standard three-wire cable without
shielding. If electromagnetic interference is expected which is above
the test values of EN 61326 for industrial areas, shielded cable should
be used.
Make sure that the cable used has the required temperature resist-
ance and fire safety for max. occurring ambient temperature
Use cable with round cross section for instruments with housing and
cable gland. To ensure the seal effect of the cable gland (IP protection
rating), find out which cable outer diameter the cable gland is suitable
for.
Use a cable gland fitting the cable diameter.
Cover all housing openings conforming to standard according to
EN 60079-1.
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
Note:
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Note:
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
VEGAMIP T61 • Emitting unit