Delta MCS-1800 - Manual (Page 6)

DELTA MCS-1800 3U Power Shelf
Installation, Operations and
Maintenance Manual
2-1
2 Product Description
2.1 Product Description
This power Shelf consists of modular rectifiers, an Alarm Control Unit (ALU), and a DC distribution
module. Up to four rectifiers and an alarm unit can be equipped on a shelf containing an integrated distribution
module. The rectifiers can operate from a universal range of AC line voltages. The High Line (HL)
operations are defined at an AC line input range of 165VAC~ 264VAC. The Low Line (LL) operations are
defined at an AC line input range of 90 VAC-130 VAC.
The system is controlled and monitored by the ALU. System level rectifier voltage settings, system
status, and alarms are displayed on the ALU. The system float voltage, equalize voltage, and alarm thresholds
are set from RMS. The ALU also provides automatic derating of the output power over the whole operating
line voltages. Figure 1 shows different functional blocks of the system.
2.2 Product Main Features
The Power Shelf has the following main features:
-48 VDC/120 Amps, or +24VDC/200Amps, N+1 redundancy
Modular design for scalable, cost effective expansion
Front access for simple installation and maintenance
High power density
Active Power Factor Correction (>. 99PFC)
High efficiency
Temperature compensated float voltage control
Alarm Control Unit
Low Voltage Battery Disconnect (LVBD) (System equipped with PDU)
Remote Monitoring and control
2.3 System Specifications
The system specifications are provided in the following sections.
2.3.1 -48V Standard Power Shelf Configuration(MODUL NAME: ES48/120-JAAxx)
(1) AC Input: 175VAC ~ 275VAC, 48Amps. Max
(2) System Capacity: 120Amps. Max.
(3) Rectifier: -48V/30A×1~4
(4) Control and Supervisory Unit
Figure 1 shows a front view of shelf.