UL 1876 Isolating Signal and Feedback Transformers for Use in Electronic Equipment

standard by Underwriters Laboratories, 05/17/2001

Full Description

1.1 These requirements apply to isolating signal and feedback transformers intended to be used in electronic equipment where only audio, video, and other signalwaveforms are transformed. These transformers are intended to provide isolation from circuits that are either conductively connected to a branch circuit supply orconnected to secondary circuits involving voltages that are considered to present a risk of electric shock by the nature of their use in an end-product.

1.2 These requirements do not apply to transformers and motor-transformers that are connected to a supply circuit to power a secondary circuit.

1.3 A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, andthat involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements tomaintain the level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conflictwith specific requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformancewith the methods employed for development, revision, and implementation of this standard.

Product Details

Edition: 3rd Published: 05/17/2001 Number of Pages: 32