11
1. Introduction
Description
The NT5C06D Switch Mode Rectifier is rated for 25 A at -48 V DC. This rectifier incorporates AC input power factor correction circuitry, is highly efficient and lightweight (15 lbs.). It is fully connectorized and plugs into a power shelf into which up to three rectifiers can be installed. The rectifier is forced air cooled with air entering from the front and exhausting out the rear of the power shelf.
Separate or common AC power feeds are connected to the power shelf to provide power to each rectifier through the back plane connectors. The rectifier requires a single phase AC source at a nominal voltage of 208/240 V AC, 50 or 60 Hz. The AC power can be supplied from a single phase source or a three-phase system connected phase to phase. The rectifier can also be powered from a 380 V AC WYE system connected phase to neutral (that is, 220 V phase-neutral).
The negative and positive outputs of each rectifier are connected to two common busses (BAT -48 and BAT RTN +). The power shelf is designed for a typical capacity of 75 A. The design of the rectifiers allows rectifiers located in the same power shelf, or other shelves, which are connected in parallel, to share the load, either by forced load share or by an output negative slope method.
The back plane of the power shelf is equipped with two types of signal connectors. One is an eight-pin (male) connector that provides the interface to analog type controllers. The other connector is a twenty-six-pin flat cable (female) type connector compatible with the Helios system family and provides a larger diagnostic capability.
Each rectifier provides a variety of monitoring and alarm features such as, rectifier failure alarm, fan fail alarm, ac fail alarm, remote sensing, sense fail alarm, local and remote high voltage shutdown, automatic high voltage shutdown reset, temporary release, remote and local equalize, and remote shunt monitoring.
Helios Rectifier 25/48NT5C06D Installation and User Manual
