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PSI 9000 2U Series
PSI 9000 2U Series • DC Laboratory Power Supply • User Manual
2.3.4 Connection to AC supply
•
The device can be connected to any wall socket or multi-socket outlet, as long as those feature
a safety contact (PE) and are rated for 16 A.
•
When connecting the device to a multi-socket outlet, along with other electric devices, it is
important to consider the total power consumption of all devices on the outlet, so that the
maximum current (power ÷ mininum voltage) does not exceed the rating for the wall socket,
the multi-socket outlet and/or main distribution
•
Before plugging in the input plug ensure that the device is switched off by its mains switch!
The device is delivered with a 3-pole mains cord. If the device is going to be connected to a standard 2-phase or
3-phase supply, the following leads and phases are required:
Nominal power Phases
Supply type
1 kW - 3 kW
L1 or L2 or L3, N, PE
Wall socket
The default input values of all models in this series are: 230 V, 16 A, 50 Hz. It is fused with 16 A. The maximum
input current depends on the higher current intake at low AC voltage (for minimum input voltage see technical
specs). Custom made cables thus require to have a cross section of 1.5 mm² (AWG16) minimum per lead, recom-
mend is 2.5 mm² (AWG12).
2.3.5 Connection to DC loads
For a device with a high nominal current using a thick and heavy DC connection cable
it is necessary to consider the weight of the cable and the strain imposed on the DC
connection. A strain reliever should be used when mounted in a 19” cabinet or similar,
where the cable hangs on the DC output, .
• Connection to, and operation with, transformerless DC-AC inverters (for example
solar inverters) is restricted because the inverter can shift the potential of negative
output (DC-) against PE (ground), which is limited to max. 400 V DC.
The DC load output is on the rearside of the device and is
not
protected by a fuse. The cross section of the con-
nection cable is determined by the current consumption, cable length and ambient temperature.
For cables
up to
1.5 m
and average ambient temperature up to 50°C, we recommend:
up to
10 A
:
0,75 mm² (AWG18)
up to
15 A
:
1,5 mm² (AWG14)
up to
30 A
:
4 mm² (AWG10)
up to
40 A
:
6 mm² (AWG8)
up to
60 A
:
16 mm² (AWG4)
up to
120 A
: 35 mm² (AWG1)
per lead
(multi-conductor, insulated, openly suspended). Single cables of, for example, 70 mm² may be replaced
by e.g. 2x35 mm² etc. If the cables are long then the cross section must be increased to avoid voltage loss and
overheating.
2.3.5.1 DC terminal types
The table below shows an overview of the various DC terminals. It is recommended that connection of load cables
always utilizes flexible cables with ring lugs.
Type 1: Models up to 80 V output voltage
Type 2: Models from 200 V output voltage
M8 (8 mm) bolt on a brass block
Recommendation: M8 ring lug with a 8.4 mm hole
Screw clamp connection M6, on copper rail
Recommendation: M6 ring lug with a 6.5 mm hole
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