Powerware 9315 - Manual (Page 29)

23 Powerware 9315 Parallel Redundant System I & O
164202013 Rev. D 041599
Control Wiring Interconnect Details
Each UPS module requires control signal wiring from the module to the parallel
cabinet. The purpose of signaling is to facilitate the closing of the module output
breakers and coordinate transfers to and from bypass. Once this system has been
properly placed into operation, it will operate as a parallel redundant system even if
the control wiring becomes disabled through shorts or opens. Figure 9 shows the
grouping for twisting requirements. Refer to Table A in this chapter for control
wiring recommendations and termination capability.
NOTE: Material and labor for external wiring are to be provided by designated
personnel.
Table A. Control Wiring Requirements and Termination Requirements
Connection
Points in
Parallel
Cabinet
Size of
Pressure
Termination
(lb--in)
Maximum
Voltage and
Current
Connection
Points in UPS
Size of
Pressure
Termination
(lb--in)
Recommended
Wiring Size
TB1--1
through
TB1--7
#18--#8,
(55)
24V, 0.25A TB3--1 through
TB3--7
#22--#12,
(5--7)
#18--#12
Notes for Table A:
1. Install the control wiring in separate conduit from the power wiring. Only
copper wire or tinned copper wire should be used.
2. Control wiring is NEC class 2 (IEC 950 SELV).
3. Class 1 methods are recommended for control wiring.
4. Control wiring should be twisted pairs and twisted triple as shown in Figure 9.
Indicates grouping for twisting requirements.
1
2
3
4
5
6
7 1
2
3
4
5
6
7
UPS
Module 1
(or 2)
Parallel
Cabinet
MOB#1
(#2)
TB3 TB1
Figure 9. Grouping for Twisting Requirements