GB/T 19212.9-2016
Safety of transformers, reactors, power supply units and combinations thereof—Part 9: Particular requirements and tests for transformers and power supply units for bells and chimes

Standard No.

GB/T 19212.9-2016

Language

Chinese

Release Date

2016

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Lastest

GB/T 19212.9-2016

Replace

GB 19212.9-2007

Scope

This chapter of GB/T 19212.1-2016 is replaced by the following content: This part of GB/T 19212 specifies the safety requirements for electric bells and electric clock transformers and power supply units with built-in electric bells and electric clock transformers. Transformers with electronic circuits are also included in this standard. Unless otherwise specified, the following "transformers" include bells and clock transformers and power supply units incorporating bells and clock transformers. This section applies to stationary, single-phase, air-cooled (self-cooled or air-cooled), independent or supporting dry-type transformers. Its windings can be encapsulated or non-encapsulated. This standard applies to transformers and power supply units (linear). This part is used in conjunction with GB 19212.17 switching power supply unit, and also applies to power supply units whose internal operating frequency exceeds 500 Hz. Where the requirements of two standards are inconsistent, the more stringent standard takes precedence. The rated power supply voltage does not exceed AC 250 V, and the rated power supply frequency does not exceed 500 Hz. This standard applies to transformers and linear power supply units whose internal operating frequency does not exceed 500 Hz. Rated output should not exceed 100 VA. The no-load output voltage does not exceed 33 V AC or 46 V DC without ripple, and the rated output voltage does not exceed 24 V AC or 33 V DC without ripple. Bell and clock transformers are generally intended to supply short-duration household electro-acoustic signaling equipment and other similar apparatus on which loads are applied. This standard does not apply to external circuits and their components intended to be connected to the input and output terminals of the transformer. Transformers covered by this standard may be used when installation regulations or final product standards require double or reinforced insulation between circuits. This part applies to transformers matched with special equipment, and its scope is determined by relevant standards.

GB/T 19212.9-2016 history

• 2014 GB 19212.10-2014 Safety of transformers, reactors,power supply units and combinations thereof.Part 10:Particular requirements and tests for transformers and power supply units for class Ⅲ handlamps for tungsten filament lamps
• 2007 GB 19212.10-2007 Safety of power transformers， power supply units and similar devices Part 10: Particular requirements for transformers for class Ⅲ handlamps for tungsten filament lamps
• 1991 GB 13028-1991 Isolating transformers and safety isolating transformers--Requirements

GB/T 19212.9-2016 Safety of transformers, reactors, power supply units and combinations thereof—Part 9: Particular requirements and tests for transformers and power supply units for bells and chimes has been changed from GB 19212.9-2007 Safety of power transformers, power supply units and similar devices Part 9: Particular requirements for bell and chime transformers.

GB/T 19212.9-2016 -All Parts