installation

2.7 Connection of power circuits

Before making connections, check that switches Q1, Q4S, Q3BP and Q5N are in the "open" position (toggle opposite the "O" mark).

General:

in the case of parallel-connected rectifier-inverter cubicles with SSC, switches Q4S and Q3BP are not included and mains 2 is connected to the Static Switch Cubicle. The other connections are the same;

for modular UPSs with an external maintenance bypass, switch Q3BP must be locked open;

the power cables for the connections between cubicles are not supplied;

open the doors and remove the lower terminal shields (secured by screws to the cubicle chassis) of the rectifier-inverter and Static Switch Cubicles;

connect the cables shown in heavy lines in the wiring diagrams shown previously to the terminals specified in the figures below;

each cubicle must be earthed;

the routing of the power cables is shown in the figures;

the auxiliary wiring is routed in troughs located nearby (not shown in the drawings);

outside the cubicles, separate the auxiliary wiring from the power cables;

all the cubicles must be interconnected for earthing, forming a mesh which is itself connected to the building structure and earthing electrode;

the connection drawings hereafter show the cubicles with doors open and terminal shields removed.

Left cubicle of single-unit or parallel UPS with SSC

cross-section AA

front view

air extraction

 

 

 

 

 

 

front

rear

 

 

 

A

 

 

 

 

 

 

 

 

rectifier

inverter

inverter

inverter

 

 

charger

stack

 

stack

stack

 

air

 

 

 

 

 

 

admission

 

 

 

 

 

 

 

 

 

 

FHCZ

 

 

 

 

 

 

board

 

 

 

 

off

 

 

 

 

transformer

 

on

Q1

 

 

 

 

 

 

 

 

battery

 

 

 

 

 

 

mains 1

 

L1 L2 L3

 

L+

L

 

mains 1

 

battery

 

 

 

air

 

 

 

 

 

 

admission

 

 

 

 

 

 

cable tie bar

 

 

 

 

 

 

connection

spacing

cable

 

A

 

from below

uprights

tie bar

 

 

 

 

 

trough (if applicable)

 

 

 

power cable routing

 

 

 

 

 

 

via the bottom

 

 

Cables connected by lugs to 100 x 8 mm copper terminals and 13 mm diameter holes.

Height of connections relative to floor:

mains 1: 450 mm;

battery: 480 mm.

34006451EN/AC - Page 19

Page 19
Image 19
APC 9000 Connection of power circuits, General, Left cubicle of single-unit or parallel UPS with SSC, Cross-section AA