Side-by-side reference

Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

First referenceCompare with

TSC

Symbols

Thyristor-switched capacitor

A thyristor-switched capacitor connects a capacitor bank through anti-parallel thyristors, usually with a small series reactor to limit inrush. The thyristors switch the capacitor in at the instant when the network voltage equals the capacitor voltage, avoiding transients, and switch it out at current zero. It is either fully on or fully off.

Drawing use: SLD / Schematic
Application: Microgrid systems
Reference family: IEC / IEEE / ANSI

A distinction that matters

A TSC switches capacitors in steps without transients; a mechanically switched capacitor uses a breaker and is much slower.

Full reference

SVC

Symbols

Static var compensator

A static var compensator is a shunt-connected installation that controls voltage by rapidly varying the reactive power it exchanges with the network. Its branches are typically a thyristor-controlled reactor, one or more thyristor-switched capacitors and harmonic filters, all connected to the secondary of a dedicated step-down transformer.

Drawing use: SLD
Application: Microgrid systems
Reference family: IEC / IEEE / ANSI

A distinction that matters

An SVC varies switched reactances; a STATCOM uses a voltage-source converter and holds output current better at low voltage.

Full reference

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.