Signals-/data lines
Do not overpass the maximum power allowed, which varies, according to the type of signal.
Do not lay the cables near power lines that have a different voltage or emit electromagnetic interference.
Do not lay the cable near devices which can generate electromagnetic interferences.
Do not lay the cables parallel to other cables; cable crossings are possible, only if laid at 90°.
In case of parallel power supply and signal cables, use separate metal ducts. Minimum distance between power sup
-
ply and signal cables:
•
300 mm for absorption up to 10A.
•
500 mm for absorption up to 50A.
Connect the screen to the ground, only if there aren’t disturbances.
Guarantee the continuity of the screen during the entire extension of the cable. Respect impendency, capacity and
attenuation indications.
Power supply cables section
Belaria
®
fit (53)
Belaria
®
fit (85)
Max. cable section Cu (mm²)
25
25
Power supply network requirements
1. The short circuit capacity of the line must be less than 15 kA
2. The units can only be connected to TN, TT distribution systems
3. Voltage 400-3-50 +/-10 %
4. Phase unbalance < 2 %
5. Harmonic distortion less than 12% (THDv<12 %)
6. Voltage interruptions lasting no longer than 3 ms and with at least 1 s between each one
7. Voltage dips not exceeding 20 % of the RMS value, lasting no longer than a single period (50 Hz) and with at least
1 s between each dip.
8. Earth cable as specified in the table:
Cross-section of the line conductors (mm
2
)
Minimum cross-section of the protective conductor (PE) (mm
2
)
S
≤
16
S
16 < S
≤
35
16
S > 35
S/2
EMC filter
Option available for installation in residential, commercial and light industrial environments for conducted emissions
(direct connection to the public grid).
The Belaria
®
fit (85) has an EMC filter built in, it allows the unit to be installed in residential, commercial or light indus
-
trial environments, and reduces electromagnetic interference.
17
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ElECTRICal ConnECTIonS
