Emerson U/300/S/6P, 200 Dual Bus System Installation Procedures, Bypass suppl y, Input rectifier

Chapter 7 “1+N” System 55

8.Check that no warning message is displayed in the top right corner of the LCD screen and the status of the LEDs as follows:

Table 7-1	LED status
LED	Status
Rectifier LED	Steady green
Bypass LED	Off
Battery LED	Off
Inverter LED	Steady green
Load LED	Steady green
Alarm LED	Off

7.3.5 Shutdown Procedure (Complete UPS And Load Shutdown)

Refer to 5.7 Shutdown Procedure (Complete UPS And Load Shutdown).

7.4 Dual Bus System Installation Procedures

7.4.1 Cabinet Installation

As shown in Figure 7-3, the dual bus system consists of two independent UPS configurations each consisting of one or more UPS modules. Dual bus systems are high availability configurations suitable for loads with multiple input terminals. For single input loads an optional static transfer switch (STS) may be added.

The objective of the dual bus system is to keep the output of two independent UPS systems (or parallel systems) in synchronization using optional load bus synchronization (LBS) cable. One system is designated as the master; the other is designated as the slave. The operating modes covered comprise master and or slave operating inverter or bypass mode.

In installation, place the UPS modules side by side and interconnect as described in the following sections.

Bypass supply Bypass supply

Input rectifier

Input rectifier

Input rectifier Input rectifier

Parallel

cable

LBS

cable

Parallel

cable

Load

Figure 7-3 Typical dual bus system (using STS and LBS cable)

7.4.2 Protective Devices

Refer to 3.1.6 Protective Devices.

HIPULSE U UPS Single Module And “1+N” (Expandable) 160/200/300/400kVA User Manual