Star point creator Zan0 with zig-zag-circuit


Datasheet as PDF

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Starpoint creator Zan0

BV 14025013


Customer’s demand


We need a 80 kVA transformer which can create an Y-net with starpoint by using a threephase triangle circuit. At the output there will be very high unbalanced loads connected on one phase.
The transformer should have a switch so it can be turned on or off and it hast to be fused against overload. As the device will be placed in an outdoor area it must have protection class IP 54. Hum noise must be as low as possible. The transformer will be delivered to USA Las Vegas, thus the input voltage has to be 3 x 208 V ad additionally all used materials must be UL certified.


Solution


We build a three phase transformer with zig-zag-circuit Zan0. The starpoint should be either fully loadable or asymmetric fault currents need to be measurable. In this case the starpoint has to be grounded with low-impedance. On the primary side we mount a miniature circuit breaker with thermomagnetic trigger. The fully capsuled housing IP 54 has dimensions appropriate for operation during stress. Heating can be released even under full load then. Rubber buffers are fastened at the transformer to keep the hum noises as low as possible.


Technical data


power: 80 kVA
primary: 3 x 208 V
secondary: 3 x 400 V
vector group: Zan0
starpoint may be charged 100 %


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