Siemens ULTRAMAT 23, Manual, Page: 75 / 244

Connecting
5.3 Electrical connection
ULTRAMAT 23
Manual, 3/2016, A5E37100388-003
75
A power supply cable or an appliance plug is enclosed with the device, and must only be
connected by qualified personnel (see Qualified Personnel (Page 13)). The cable is
connected to the appliance socket at the rear of the device. At the power supply end, the
cable is inserted into a mains socket.
19" rack unit
A flexible cable suitable for power supply cords must be connected to the appliance plug.
The cross-section of each conductor must be at least 1 mm
2
. The cross-section of the PE
conductor must not be smaller than that of the L and N conductors. The cable must be
suitable for a temperature of at least 70 °C (158 °F) and must be approved for the country of
use or the location.
A readily accessible facility for mains disconnection must be provided in the immediate
vicinity of the analyzer.
Bench-top unit
A power supply cable must be used which is approved for the country of use or the location.
The minimum cross-section of each conductor must be at least 0.75 mm
2
as long as the
maximum length of the cable does not exceed 2 m (6 1/2 ft). Longer cables require larger
conductor cross-sections than 0.75 mm
2
. The cable must at least be suitable for a
temperature of 70 °C (158 °F).
When positioning the analyzer, make sure that the power connector at the rear is accessible
at all times.
Note
Disconnecting means
Die power supply cable also serves as the disconnecting means.
Make sure that the cable is
• clearly recognizable
•
easy to reach.
The cable length must not exceed 3 m.
Electrical circuit breaker in accordance with IEC 60947-1 and IEC 60947-3
In accordance with IEC 60947-1 "Standard for low-voltage switchgear and controlgear" and
IEC 60947-3 "Switches, disconnectors, fuses" you require an electrical circuit breaker for the
device.
We recommend commercially available automatic circuit breakers.