FAQ
1. What current ratios are available for the HY-60 current transformer?
The HY-60 current transformer is available in 800/5A, 1000/5A, 1200/5A, 1500/5A, 2000/5A, 2500/5A, 3000/5A, and 4000/5A ratios. Select the ratio according to your normal operating current, maximum expected current, and meter requirements. An unnecessarily high ratio may reduce measurement performance at low operating currents.
2. Is the HY-60 Class 0.5S current transformer suitable for energy metering?
The HY-60 offers Class 0.5S accuracy with a rated burden of 5VA, making it a suitable option for energy metering and electrical monitoring applications where these specifications meet the project requirements. For billing or revenue metering, confirm the applicable standards, required approvals, and accuracy documentation before ordering.
3. Is the HY-60’s 5VA rated burden sufficient for my installation?
The total secondary burden includes the connected meter, secondary cables, and connections. This total must meet the conditions specified for the CT’s accuracy rating. For a 5A secondary circuit, cable burden can be calculated as 25 × the complete cable loop resistance in ohms. Provide your meter burden, cable length, and conductor cross-section for a suitability check.
4. Can the HY-60 current transformer accommodate large cables or busbars?
The HY-60 features a wide window for accommodating large cables or busbars. Installation suitability depends on the actual window dimensions, conductor dimensions, and conductor arrangement. Before ordering, check the dimensional drawing and provide the busbar width and thickness, or the outside diameter and quantity of cables that must pass through the window.
5. Can the HY-60 be used with a meter that has a 5A current input?
Yes. The listed HY-60 models have a rated secondary output of 5A and operate at 50/60Hz. Confirm that the meter supports the selected CT ratio and that the complete secondary burden meets the CT requirements. Set the correct ratio in the meter and follow the specified polarity. Never leave the CT secondary circuit open while primary current is flowing.
