10.0WIRING INSPECTION

1.Verify all power connections are tight.

2.Verify all control wire terminations are tight.

3.Verify all power wires and connections have proper spacing between exposed surfaces, phase- to-phase and phase-to-ground.

4.Verify that all control wires are run in individual, separate, steel conduit.

Table 1

Power Wiring Terminals - Factory Supplied

 

 

UPS Module Rating

Connection Type

500 kVA, 6-Pulse Rectifier

All power connections are top or bottom cable entry to busbars on the right

 

 

side of module.

 

 

500 kVA, 12-Pulse

Busbars for DC input, AC output, Neutral and Ground are provided on the

Rectifier

 

right side of module, with top or bottom cable entry. Rectifier input is top entry

 

 

directly to lugs on top of input circuit breaker.

 

 

625-750 kVA, standard

Busbars for AC output, Neutral and Ground are provided on the right side of

models with standard input

module, with top or bottom cable entry. Rectifier input is top entry directly to

 

 

lugs on top of input circuit breaker. DC input is top entry to bus bars.

 

 

750 kVA/675 kW and other

Busbars for AC output, Neutral and Ground are provided on the right side of

modules with optional

module, with top or bottom cable entry. Rectifier input and DC input are top

input busbar kit

entry to bus bars.

 

 

 

Use 75°C copper wire. Select wire size based on the ampacities in Table 310-16(see Table 3 of this manual) and associated notes of the National Electrical Code (NFPA 70).

Use commercially available solderless lugs for the wire size required for your application. Connect wire to the lug using tool and procedure specified by the lug manufacturer.

Table 2

Torque Specifications

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nut and Bolt Combinations

 

 

 

 

 

 

 

 

 

 

Grade 2

 

Electrical Connections

 

 

 

Standard

 

with Belleville Washers

 

 

 

 

 

 

 

 

 

 

Bolt Shaft Size

 

Lb-in

 

 

N-m

Lb-in

N-m

 

1/4

 

53

 

 

6.0

46

5.2

 

 

 

 

 

 

 

 

 

 

5/16

 

107

 

 

12

60

6.8

 

 

 

 

 

 

 

 

 

 

3/8

 

192

 

 

22

95

11

 

 

 

 

 

 

 

 

 

 

1/2

 

428

 

 

48

256

29

 

 

 

 

 

Circuit Breakers With Compression Lugs (For Power Wiring)

 

 

Cable Size or Range

 

Lb-in

 

 

N-m

 

 

 

 

 

 

 

 

 

 

 

 

#6 - #4

 

100

 

 

11

 

 

 

 

 

 

 

 

 

 

 

 

#3 - #1

 

125

 

 

14

 

 

 

 

 

 

 

 

 

 

 

 

1/0 - 2/0

 

150

 

 

17

 

 

 

 

 

 

 

 

 

 

 

 

3/0 - 200 MCM

 

200

 

 

23

 

 

 

 

 

 

 

 

 

 

 

 

250 - 400 MCM

 

250

 

 

28

 

 

 

 

 

 

 

 

 

 

 

 

500 - 700 MCM

 

300

 

 

34

 

 

 

 

 

 

 

 

Terminal Block Compression Lugs (For Control Wiring)

 

 

 

AWG Wire Size or Range

 

Lb-in

 

 

N-m

 

 

 

#22 - #14

 

3.5 to 5.3

 

0.4 to 0.6

 

 

 

 

 

 

 

 

 

 

 

Use the values in this table unless the equipment is labeled with a different torque value.

Wiring Inspection

27

Page 33
Image 33
Liebert 600TTM installation manual Wiring Inspection, Power Wiring Terminals Factory Supplied