scope:

This specification covers selenium metallic rectifiers consisting of one or more cells.

The type designation shall be in the following form, and as specified (see 3.1 and 6.2):

The style is identified by the two-letter symbol "RS" followed by a two-digit number; the letters identify selenium metallic rectifiers and the number identifies the cell size in accordance with table I. TABLE I. Style.

Symbol Cell size Symbol Cell size ----------------------------------------------------------- Inches Inches RS10 - - - 1 × 1 RS50 - - - 3 × 3 RS20 - - - 1.25 × 1.25 RS60 - - - 4 × 4 RS30 - - - 1.6 × 1.6 RS70 - - - 4 × 6 RS40 - - - 2.2 × 2.2 RS80 - - - 5 × 6

The method of mounting is identified by a single letter in accordance with table II. TABLE II. Mounting method.

Symbol Mounting method ---------------------------------- B - - - - - - Bolt S - - - - - - Stud

The nominal direct-current (dc) output voltage rating, at 55°C ambient temperature, when the rectifier is connected to a resistive load, is identified by a three-digit number: the first two digits represent significant figures and the last digit specifies the number of zeros to follow.

The circuit configuration is identified by a two-letter symbol in accordance with table III. TABLE III. Circuit configuration.

Symbol Circuit configuration -------------------------------------------- HS - - - - - - Half wave, single phase CS - - - - - - Center tap, single phase BS - - - - - - Bridge, single phase DS - - - - - - Doubler, single phase HT - - - - - - Half wave, three phase CT - - - - - - Center tap, three phase BT - - - - - - Bridge, three phase

The nominal dc output current rating, at 55°C ambient temperature, when the rectifier is connected to a resistive load, is identified by a three-digit number: the first two digits represent significant figures in milliamperes and the last digit specifies the number of zeros to follow.

intended Use: