User manual
Table Of Contents
- Important Safety Instructions
- 1.0 Installation Instructions
- 1.1 Unpacking and Installation
- 1.2 Additional Distribution Mounting and Wiring
- 1.3 Power and Control Wiring
- 1.3.1 Input Power Connections
- Figure 5 Electrical connection location for 23" (584mm) cabinet
- Figure 6 Electrical connection location for 47" (1194mm) cabinet
- Figure 7 Electrical connection location for 47" cabinet with Square D I-Line panelboard
- Table 4 Suggested minimum input wire size data
- Table 5 Main input circuit breaker interrupting rating
- 1.3.2 Junction Box Installation
- Table 6 Main input junction box electrical connections (4 wire)
- Table 7 Main input junction box without transformer electrical connections (5 wire)
- Table 8 Low-voltage (control) junction box dimensions, typical
- Table 9 Main input (power) junction box dimensions, typical
- Figure 8 Low-voltage control junction box connections, typical
- Figure 9 Main input junction box connections, typical
- 1.3.3 System Grounding
- 1.3.4 Grounding Electrode Conductor for Liebert® FPCs With Transformer
- 1.3.5 Output Power Connections
- 1.3.6 Control Wiring Connections
- 1.3.7 Adapter Board
- 1.3.1 Input Power Connections
- 2.0 Equipment Inspection and Startup
- 3.0 Inspection and Startup Checklist
- 4.0 Operating Instructions
- 5.0 Maintenance
Installation Instructions
20
1.3.6 Control Wiring Connections
Liebert
®
power conditioning systems have provisions for external shutdown control from Remote
Emergency Power Off (REPO) stations. Figure 12 is a simplified diagram of the shutdown circuitry
of the Liebert FPC
™
.
Low-Voltage Control Circuit
Control wiring connections must comply with the NEC and all other applicable codes.
As shown in Figure 12, the control circuit operates on 24VDC. The shutdown device (represented by
the REPO switch) activates a low-current, 24VDC relay that in turn operates the shunt-trip
mechanism. The shunt-trip solenoid opens the Main Input Breaker, which de-energizes the power
center.
Multiple-Unit Shutdown
When more than one power center is installed by the user, a typical requirement is that actuation of a
single device (REPO for example) must shut down all power centers. The low-voltage control circuits
of all standard Liebert FPC systems are designed to meet this requirement.
External Control Wiring Connections
External control wiring connections for remote shutdown, alarm, and/or monitoring are made to the
low-voltage junction box (if used) or to the adapter board terminal strip located inside the unit.
Control wiring connections vary with the type of monitoring system furnished with the unit. Typical
control wiring configurations are shown in Figures 12 through 15.
Figure 12 Simplified shutdown circuit
!
WARNING
Risk of electric shock and arc flash. Can cause injury and death.
Verify that all incoming high-voltage (power) and low-voltage (control) circuits are
de-energized and locked out before installing cables or making connections, whether in the
junction box or in the unit.
+
-
K5
K6 6
2
3
4
1
N.O. REPO
Overtemp
Switch
N.C. REPO
R1
B
9 6
3
7 4
1A
Main
Input
Breaker
Shunt
Trip
K5
K6
+24VDC
Unit EPO
Remote
Shutdown
Devices
Building
Interface
Relay
24VDC
Source
Liebert FPC