Electrical Connection; Specifications; Connection Diagram - Biral SUB4X Montage- Und Betriebsanleitung

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5. Electrical connection

The motor can be damaged if connection
or voltage is wrong!
All poles of the supply voltage must be
switched off before connecting the
control unit according to the connection
diagram.
The electrical connection must be made
by a qualified technician in agreement
with the local power supply authority.
NIN (CENELEC) regulations must be
observed.
The submersible pump with three-phase
Warning
motor must be connected to a motor
protection switch or thermal relay
(according to EN 60947-4-1 of class 10,
release under 10 seconds with 5-times
rated current). The operating current
must be adjusted (see setting of motor
protection switch under point 6.5).
All phases must be protected by a fuse
Warning
of the correct rating.
An isolating device (external mains
Warning
switch) must be provided for all phases,
in order to permit the installation to be
disconnected from the supply at all
times.
The free cable ends must on no account
be immersed or become wet in any way.
Any junction boxes must comply
at least with protection class IP65
and be installed in the zone safe
from flooding.
The rotary field of the supply voltage
Warning
should be tested with a measuring set
provided for the purpose before putting
the submersible pump into operation.
The motor could be damaged if the
direction of rotation is wrong.
Special attention must be paid to the
protective conductor connection (earth)
– The motor must be earthed without
fail.
– The protective conductor must be
longer than all pole conductors
(pull-out danger).
– A good contact of the protective
conductor should be ensured
(no pinching of insulation)

5.1 Specifications

3 × 400 VAC / 1× 230 VAC
Mains voltage:
Voltage tolerance: +6% / –10 U
Mains frequency: 50 Hz
Protection class: IP 68
18
N

5.2 Connection diagram

The insulation resistance should be checked
as described in point 6.1 before connecting
the electrical cable to the control unit.
1. Motor protection switch
2. Fuses or automatic cut-out
3. Contactor
4. Thermal relay
5. Motor with cable (wire colours)
U = black
V = blue or grey
W = brown
L = brown
N = blue
PE = yellow/green
For an output above 34 kW, 2 cables are taken
from all direct start motors in parallel with reduced
cross-section (e.g. 2 × 4 × 6 mm
(e.g. 1 × 4 × 10 mm
2 ). The connector assignments
remain unchanged as illustrated above,
i.e. the two cables are connected in parallel.
2 ) instead of 1 cable