Cast Resin Type Transformer Nameplate Parameters

Each CHH Power cast resin transformer is equipped with a factory nameplate that serves as a cornerstone for safe, reliable operation and informed customer selection. These engraved details provide precise technical guidance—ensuring the transformer aligns with application requirements and supporting proper maintenance throughout its lifecycle. Below is a clarified, accurate breakdown of the core parameters on CHH Power’s nameplates (correcting technical ambiguities and terminology errors from the original reference):

This denotes the maximum apparent power that CHH Power’s cast resin transformers can deliver continuously over an extended period, defining the unit’s core load-bearing capability. It is the primary reference for matching transformers to customer power demand.

The standard voltage level at which the transformer operates safely for long-term service, typically displayed for both high-voltage and low-voltage sides (e.g., 10kV/0.4kV). The value reflects the nominal voltage the windings are designed to withstand without insulation degradation.

The maximum current that CHH Power’s transformers can carry continuously under rated voltage and capacity conditions. This parameter ensures compatibility with downstream electrical systems and wiring specifications.

The ratio of the rated voltages (or rated capacities, where applicable) between the high-voltage and low-voltage sides of the transformer. Since the rated capacity may vary slightly across windings in specialized designs, the nameplate specifies this ratio to clarify voltage/current conversion relationships.

The proportional relationship between the rated voltages of each winding (e.g., high-voltage to low-voltage). This parameter directly determines the transformer’s voltage conversion function—whether step-up, step-down, or isolation.

When the secondary winding of a CHH Power transformer is short-circuited, this parameter represents the voltage applied to the primary winding (expressed as a percentage of the rated primary voltage) required to raise the secondary short-circuit current to the rated value. It is critical for assessing the transformer’s ability to withstand short-circuit faults and limiting fault current.

The power dissipated by the transformer when the secondary winding is short-circuited and the primary winding is supplied with voltage sufficient to produce rated current in the secondary. This loss stems from resistance in the windings (copper conductors) and is a key indicator of operational efficiency.

The power consumed by the transformer’s core when it is energized at rated voltage (with the secondary winding open-circuited). This loss arises from hysteresis and eddy currents in the silicon steel core, remaining nearly constant regardless of load variations.

The current drawn by the primary winding when the transformer is energized at rated voltage and the secondary is unloaded (open-circuited). Expressed as a percentage of the rated primary current, it reflects the core’s magnetization demand and is a measure of magnetic circuit efficiency.

A standardized clock-hour notation (e.g., Dyn11) that identifies the winding connection sequence, phase rotation direction, and phase shift between the high-voltage and low-voltage sides of CHH Power’s three-phase transformers. This parameter is essential for proper grid integration and avoiding phase mismatch issues.

These nameplate parameters are non-negotiable references for CHH Power customers, installers, and maintenance teams. Accurate understanding and adherence to these details ensure the transformer operates within safe limits, minimizes energy loss, and delivers consistent performance tailored to the application’s unique needs. For CHH Power, the nameplate is more than a technical label—it is a commitment to transparency and reliability.