Hella Induperm CCR 961-SW4.00, Руководство пользователя

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CCR961 MANUAL-GB
17
Version B2:01-07-2015
3.5 Power Transformer
Standard sizes are as follows: 2,2 - 3 – 5 – 7,5 – 10 – 12,5 – 15 – 20 – 25 – 30 - 35kVA.
The Transformers are, as standard, available for 230V or 400V. For all types larger than 20 kVA,
the standard is 400V. Other primary voltages upon request.
As our standard is preferred the 400V series, as the total losses for the CCR are less than for the
230V series.
The transformers are constructed with two coils, each with a primary and a secondary side.
The two primary windings are, as standard connected in parallel, so each winding only have to be
calculated for 50% of the nominal primary current.
It is possible to change the primary windings from parallel to series, if the following conditions
are observed:

A transformer for 230V can be used for 400V primary voltage with the two
primary windings in series.

For a transformer with a rating more than twice the actual needed load, it is
an advantage to connect the two windings in series for better adjustment to
the load. Max. Load is only 50 % of nominal load.
The secondary winding is with several tappings for adjustment to actual load.
The two secondary windings are always connected in series.
The transformers are air-cooled.
POWER TRANSFORMER
NETZ 230 /400V
SERIENKREIS