CEE Relays Ltd.

87C Whitby Road, Slough, SL1 3DR

Telephone: (01753) 576477 Fax: (01753) 825661

Creating Intelligent Transformer Symbols

In V4.5, the intelligent transformer symbol was introduced into PTW. This allows the symbol to display the winding configuration as entered in the component editor. Creating a new transformer symbol (or editing an existing one) is as easy as with any other type of symbol using PTW's Symbol Generator.

Unlike most other symbols, transformer symbols have multiple layers:

	V4.5.1.0 and later	V5.0.1.2 and later
Layer 0	Main Symbol	Main Symbol
Layer 1	Primary: delta	Primary: delta
Layer 2	Primary: star (unearthed)	Primary: star (unearthed)
Layer 3	Primary: star-earth	Primary: star (solid earth)
Layer 4	-	Primary: star (NER earth)
Layer 11	Secondary: delta	Secondary: delta
Layer 12	Secondary: star (unearthed)	Secondary: star (unearthed)
Layer 13	Secondary: star-earth	Secondary: star (solid earth)
Layer 14	-	Secondary: star (NER earth)
Layer 21	Tertiary: delta	Tertiary: delta	)
Layer 22	Tertiary: star (unearthed)	Tertiary: star (unearthed)	) 3-winding
Layer 23	Tertiary: star-earth	Tertiary: star (solid earth)	) trans. only
Layer 24	-	Tertiary: star (NER earth)	)

Layer 0 is always shown on the SLD, together with two or three other layers to illustrate the winding configuration entered in the component editor.

Use Symbol>>Set Active Layer to switch between layers in the Symbol Generator.

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