Control Wiring Interconnect Details; Figure 9. Grouping For Twisting Requirements - Powerware 9315 Installation & Operation Manual

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
TB1--1
through
TB1--7
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.
UPS
Module 1
(or 2)
Powerware 9315 Parallel Redundant System I & O
164202013 Rev. D 041599
Size of Maximum
Pressure Voltage and
Termination Current
(lb--in)
#18--#8, 24V, 0.25A
(55)
TB3
1
2
3
4
5
6
7
Indicates grouping for twisting requirements.

Figure 9. Grouping for Twisting Requirements

Connection Size of
Points in UPS Pressure
Termination
(lb--in)
TB3--1 through #22--#12,
TB3--7 (5--7)
TB1
1
2
3
4
5
6
7
Recommended
Wiring Size
#18--#12
Parallel
Cabinet
MOB#1
(#2)
23