Neutral Grounding & Zig Zag Transformers | Acutran
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For Neutral Grounding and Custom Applications

With over 35 years in the business, Acutran Transformers single phase neutral grounding transformers or three phase Zig-Zag transformers are built to your specifications. Dry-type Zig-Zag grounding transformers are another example of Reliable Custom Transformers being built by Acutran. Neutral grounding dry-type transformers are special purpose transformers that provide a grounding path for a delta connection or an ungrounded wye.

What is a Neutral Grounding Transformer?

Generally used to protect an isolated 3-phase system in the event of a line-to-ground fault, grounding transformers provide a lower impedance path-to-ground for ground faults which shields the non-faulted phases from voltage spikes. Neutral grounding transformer units aren’t typically used in commercial or industrial applications because they do cost a little more than your conventional dry-type transformer. But if you need a ground – this is the way to go.

Acutran Custom Neutral Grounding Transformer Features

Category Description
Primary Voltage 480V, 600V, 4160V, 12470V, 13800V or other custom voltage
Continuous Current 2A, 5A, 25A, 50A or other custom voltage
Fault Current Per customer requirement
Fault Duration 5 sec, 10 sec, or other custom duration
Conductors Copper
Insulation System 180°C or 200°C
Varnish Vacuum Pressure Impregnation
Frequency 60 Hertz
Standards IEEE 32
Options X/R Ratio, Impedance Values, Enclosures, Neutral Grounding Resistor, Fuses and Switches

How Do You Spec a Zig-Zag Transformer?

When you spec a zig-zag transformer you have to consider the following:
    • Continuous neutral current
    • Neutral fault current and duration
    • Line voltage and BIL
    • Impedance requirement
    • Temperature rise
    • Enclosure type
    • Special items
For more information about this product, call 724.452.4130 or contact us.

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