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INSTALLATION
Table 2. Current Transformer Sizing
Type of CT
Rating
Branch CT
75A
Branch CT
100A
(separate accessory)
Main CT (phases A,
400A
B, C, and Neutral)
Input Ground CT
100A
Subfeed CT
400A
(separate accessory)
Table 3. Wire Tap Sizing
Housing Color
Blue
Yellow
NOTE Use wire taps ONLY on thermoplastic insulation (PVC).
14
EATON Powerware
®
Energy Management System (EMS) Upgrade Kit User's Guide
3.
Plan the wiring route from the electronics module to the monitored
breaker panel(s). See Table 2 through Table 4, Figure 5, and use the
following guidelines.
S
Mount the electronics module within 3.05m (10 ft) of a
disconnect device.
S
If installing conduit (not supplied), plan for adequate conduit
routing. Follow National Electrical Code
guidelines for conduit length and bending radius. Installed width
of the EMS−UGK with both conduit boxes is 633 mm (24.9").
Remove conduit box hole plugs as needed for conduit.
S
Follow NEC and local guidelines for filling wiring space and
maintaining the thermal performance of the equipment.
S
Plan the location and installation of the CTs and wire taps to
allow for adequate bending radius of wiring. If necessary,
support the CTs to avoid undue strain on wiring.
CT Dimensions
(W
H
D)
25.4
38.1
25.4 mm
(1.0"
1.5"
41.0
51.0
30.0 mm
(1.6"
2.0"
96.0
100.0
46.0 mm
(3.8"
3.9"
66.0
70.0
33.0 mm
(2.6"
2.8"
96.0
100.0
46.0 mm
(3.8"
3.9"
Lead Length
0.91m (36.0")
1.0")
1.00m (39.4")
1.2")
0.91m (36.0")
1.8")
0.91m (36.0")
1.3")
0.91m (36.0")
1.8")
Wire Size
2
0.75–2.5 mm
(18–14 AWG)
2
4.0 mm
(12 AWG)
S
164201724 Rev 1 www.powerware.com
(NEC
) and local
®
®
Maximum Wire Insulation
Outside Diameter
10.16 mm (0.40")
16.00 mm (0.63")
22.86 mm (0.90")
15.24 mm (0.60")
22.86 mm (0.90")
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