Delta MCS-600 Power Shelf
Installation, Operations and
Maintenance Manual
REV.: 03
2-1
Customer Specification Confidential
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 five 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 165 VAC-264 VAC. The Low Line (LL) operations are defined at an AC
line input range of 90 VAC-130 VAC. Each PSU can provide an output of –54.3 VDC at 10 Amps (HL)/5
Amps (LL), to power the load and maintain battery charge.
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 or Web browser. 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/50 Amps, N+1 redundancy (19” rack, 5 rack space mounting)
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)
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
(1) AC Input:
175VAC ~ 275VAC, 20Amps. Max
(2) System Capacity:
50Amps. Max.
(3) Rectifier:
-48V/10A×1~5
(4)
Control and Supervisory Unit
(5) Low Voltage Disconnect Switch:
100A×1 @ Single Pole at Battery Side
(6) Battery
Breaker:
100A×1
Figure 1 shows a front view of shelf.
2.3.2 -48V System with Power Distribution and Rectifiers
(1) AC Input:
175VAC ~ 275VAC, 16Amps. Max
(2) System
Capacity:
40Amps.
Max.
(3) Rectifier:
-48V/10A×1~4
(4) Control
and
Supervisory
