HEIDENHAIN TNC 410 M Technical Manual page 400

X31: Power supply
6 – 74
Supply voltage: 400 V ± 10 %
Connection:
Connecting terminal
U
V
Note
If you are using non-HEIDENHAIN inverter systems or regenerative
HEIDENHAIN inverter systems, you must connect the supply voltage to
the terminals U and V via an isolating transformer (300 VA, basic
insulation as per IEC 61800-5-1 or protective insulation as per VDE 0550).
There is no need for an isolating transformer if non-regenerative
HEIDENHAIN inverter systems are used.
Warning
When using an isolating transformer, do not ground this isolating
transformer on the secondary side!
The isolating transformer decouples the line voltage from ground.
Grounding the isolating transformer on the secondary side leads to an
addition of the dc-link voltage and the supply voltage. This overloads the
UV 105, thereby destroying it!
Please keep this in mind in your circuit diagrams.
HEIDENHAIN Technical Manual for Inverter Systems and Motors
Assignment
Phase 1 / 400 V~ ±10% / 50 Hz to 60 Hz
Phase 2 / 400 V~ ±10% / 50 Hz to 60 Hz
Equipment ground (YL/GY),
2
≥ 10 mm
(AWG 6)
Cable:
Wire cross section: 1.5 mm
Line fuse:
6.3 A (gR) Siemens Sitor type
The screw terminal between X31 and the
grounding terminal must be used for fixing the
cable and for ensuring appropriate strain relief
of the cable.
Grounding terminal:
2
≥ 10 mm
(AWG 6)
Tightening torque for connecting terminals:
0.7 Nm (6.5 - 7 lbs/in)
2
(AWG 16)