Adjusting The Line Voltage By Means Of A Transformer - HEIDENHAIN TNC 410 M Technical Manual

Isolating
transformer

4.1.8 Adjusting the Line Voltage by Means of a Transformer

4 – 8
If an isolating transformer is required, it must be wired on the secondary side
in the Y circuit. The isolating transformer's star point on the secondary side
must be connected to the grounding conductor potential and must be
connected to the grounding conductor of the inverter system.
The following dimensions are recommended:
Power supply unit
UV 140, UVR 140 D
UVR 150
UVR 150 D
UVR 160 D(W)
If no line power of 400 V~ ±10% is available, an autotransformer can be used
for adjusting the line voltage.
Unit
a
UE 11x
UE 21x
UE 21xB
UE 230, UE 24x
UE 230B, UE 24xB
UV 120, UVR 120 D, UR 2xx
UV 130, UV130 D
UVR 130D
UV 140, UVR 140 D
UVR 150
UVR 150D
UVR 160D(W)
a. The inverters can be operated up to a line voltage of 480 V~ +6%.
HEIDENHAIN Technical Manual for Inverter Systems and Motors
Rated
power output of
the isolating
transformer
≥ 58.3 kVA
S
N
≥ 65 kVA
S
N
≥ 71.5 kVA
S
N
≥ 105kVA
S
N
Rated power output of
the autotransformer
≥ 15.0 kVA
S
N
≥ 19.5 kVA
S
N
≥ 22.5 kVA
S
N
≥ 30.0 kVA
S
N
≥ 33.0 kVA
S
N
≥ 28.6 kVA
S
N
≥ 45.0 kVA
S
N
≥ 39.0 kVA
S
N
≥ 58.5 kVA
S
N
≥ 65.0 kVA
S
N
≥ 71.5 kVA
S
N
≥ 105 kVA
S
N
Short-circuit voltage
≤ 3 %
U
K
≤ 3 %
U
K
≤ 3 %
U
K
≤ 3 %
U
K