Thyristorized on-load tap changer (OLTC) capability “On-load tap changers using thyristors can have a maximum of only two taps.” Is this statement correct?

Introduction / Context:On-load tap changers (OLTCs) adjust transformer turns ratio under load to regulate voltage. Solid-state (thyristorized) OLTCs replace mechanical contacts with controlled switches, enabling fast, arcless commutation between taps.

Given Data / Assumptions:

• Multiple discrete taps on the transformer winding.
• Thyristor pairs or bidirectional devices connect selected taps via transition schemes.

Concept / Approach:There is no inherent limit of “two taps” with thyristor implementations. Designs can realize many taps (e.g., ±10% in 1.25% steps) by arranging switch matrices or using per-tap valve modules and appropriate interlocks/timing to avoid short-circuits between taps during transitions.

Step-by-Step Solution:Identify claim: “maximum two taps”.Counter-example: commercial solid-state OLTCs routinely provide numerous taps.Conclusion: Statement is false.

Verification / Alternative check:Product literature and utility specifications list many-tap solid-state voltage regulators and OLTCs.

Why Other Options Are Wrong:

• Any “True” variants contradict practical systems with multiple taps.
• Connectivity (delta/wye) does not impose a two-tap maximum.

Common Pitfalls:

• Confusing a minimal demonstrator (two taps) with real-world multi-tap OLTC capability.

Final Answer:False