Introduction:
In electrical power systems, zero sequence reactance and positive sequence reactance are important parameters that describe the behavior of equipment. The reactance values can vary depending on the type of equipment being considered. In this case, it is stated that the zero sequence reactance will be more than the positive sequence reactance for a specific type of equipment. Let's analyze this in detail.

Transmission Line and Transformer:
Both transmission lines and transformers exhibit a higher zero sequence reactance compared to their positive sequence reactance. This can be attributed to the construction and design of these equipment.

Transmission Line:
A transmission line is designed to carry three-phase power, where the three conductors are arranged in a specific configuration. In a balanced three-phase system, the currents flowing through the conductors are equal in magnitude and 120 degrees out of phase with each other. However, during unbalanced conditions or in the presence of zero sequence currents, the currents in the three conductors are no longer equal.

During zero sequence currents, the currents in the three conductors can be different, and the transmission line exhibits unequal distribution of current. This results in a higher zero sequence reactance compared to the positive sequence reactance.

Transformer:
Transformers are designed to transfer electrical energy between different voltage levels. In a three-phase transformer, the primary and secondary windings are arranged in a specific configuration. During normal operation, the currents in the primary and secondary windings are balanced and equal in magnitude.

However, during unbalanced conditions or in the presence of zero sequence currents, the currents in the primary and secondary windings can become unequal. This leads to an unequal distribution of current and a higher zero sequence reactance compared to the positive sequence reactance.

Conclusion:
The zero sequence reactance is higher than the positive sequence reactance for both transmission lines and transformers. This is due to the unequal distribution of current during unbalanced conditions or in the presence of zero sequence currents. It is important to consider these reactance values while analyzing the behavior and performance of electrical power systems.