38
C6.1.11/0718-0619/E
Figure 53: Brazing
– Sectional view
3.3 Electrical connection
WARNING
Earth leakage current! Danger of electric shock!
This product includes a
three-phase frequency drive. Additional protection devices could be necessary.
This must be decided by the electrical network supplier or by the electrician
company which provides the electrical connection.
Copeland EazyCool CO
2
refrigeration units can cause earth leakage currents, both AC and DC, due
to the presence of an inverter and an EMC filter in the system. In case a three-phase inverter drive
is used, an AC/DC-sensitive Residual Current Device (RCD) should be used on the power supply
side. The RCD can be either
type B
with the frequency band up to 20 KHz (Siemens/SIQUENCE-
0.3-B or Schneider/Acti9 RCCB-ID for instance), or
type B+
.
A delay of at least 50 ms should be incorporated to prevent spurious trips. The leakage current is
likely to exceed the trip level if not all the phases are energized simultaneously.
3.3.1 Power supply connections
WARNING
Electrical cabinet cover open! Danger of electric shock!
Always make sure
the electrical cabinet cover is properly closed before starting the unit.
The electrical connection of the refrigeration unit to the power supply must be made by qualified
technicians in compliance with the valid electrical standards, eg, DIN EN 60204-1.
Additionally, the voltage drop and temperatures must be considered for cable selection. The nominal
power and current are shown in
Table 22
hereunder:
Unit
Nominal power
[kW]
Maximum current
[A]
Power supply
OME-4MTL-05X
11
19
3/N/PE~50 Hz
400/230V TN-S
OME-4MTL-07X
14
22
OME-4MTL-09X
16
27
Table 22: CO
2
unit nominal power and current
Copeland EazyCool CO
2
units are designed to be connected to one of the following power supplies:
▪
TN-S system with 380-420V / 3Ph / 50 Hz + N + PE
or
▪
TN-C system with 380-420V / 3Ph / 50 Hz + PEN
A voltage tolerance of
±
10% is acceptable.
The circuit breaker and the main switch on the backside of the unit must be switched off before
opening the hinged front cover and connecting the power supply cable.
The power cable should enter the electrical box through a rubber grommet.
Summary of Contents for Copeland EazyCool OME-4MTL-09X
Page 1: ...Copeland Eazycool CO2 Refrigeration Units Application Guidelines ...
Page 5: ......
Page 68: ...C6 1 11 0718 0619 E 63 ...
