Rockwell Automation 23P PowerFlex DC Stand Alone Regulator and Gate Amplifier - Manual (Page 73)

Rockwell Automation Publication 23P-UM001D-EN-P - July 2012 73
Specifications Appendix A
Gate Coupler Assembly
Information
Gate Coupler Assemblies, Catalog Numbers SD3K-GATMDLHIGH
and SD3K-GATMDLLOW
The Gate Coupler Assembly provides an isolation barrier between the Gate
Amplifier and the SCR Gates. Two different units are available depending on the
load requirements. The “SD3K-GATMDLHIGH” provides a higher output than
the “SD3K-GATMDLLOW”. The “SD3K-GATMDLLOW” is usually used in
special cases where the power rating of the power module is low and there is
concern about excessive SCR gate power dissipation. As a general guideline for
retrofits (non-Reliance power module), when the power output of the power
module exceeds 200HP, use the “SD3K-GATMDLHIGH”.
For the Reliance Electric Power Modules with existing Gate Coupler Modules
that are O-51378-19 or electrically equivalent (with ½ Watt resistors on the
transformer primary), neither SD3K-GATMDLHIGH nor the SD3K-
GATMDLLOW would be used. Instead, the Gate Scaling Module would be used
in series with the gate leads. This configuration is covered in detail in the Retrofit
section of this manual.
Refer to SD3K-GATMDLHIGH - 9732017* to view drawing.
Refer to SD3K-GATMDLLOW - 9732027* to view drawing.
Operating Temperatures
• The surrounding air temperature must be within 0 °C to 50 °C (32 °F to
122 °F). If any heat generating equipment is mounted underneath the unit,
ensure that the exhaust air of this equipment is not greater than 50 °C.
• Humidity must remain between 5% and 95% non-condensing.
• Power dissipation, 20 Watts.