4 4
external Power Wiring Installation
NOTE
Without accessory cabinets, conduit and wiring enter from the bottom of the UPS
conduit landing plate. With accessory cabinets, wiring can be installed between the
UPS and accessory cabinets by using conduit or by routing wiring through the
power terminal cover base wiring channels.
To install wiring:
1. Route the wiring to the UPS terminal blocks in the UPS. Figure 4-6 and Figure 4-7 for wiring access
information and terminal locations.
2. Ground the UPS according to local and/or national electrical wiring codes by routing and connecting the
ground wire to the input ground lug. See Figure 4-6 and Figure 4-7 for UPS terminal locations. For a detailed
view of the UPS ground terminals, see Figure 4-6 and Figure 4-7.
3. Connect phase A, B, C, and Neutral rectifier input power wiring from the utility source to the rectifier input
and neutral terminals. See paragraph 3.2.2 for wiring and termination requirements. For a detailed view of
the UPS terminal block, see Figure 4-6 and Figure 4-7.
4. Bypass input power wiring from the utility source to the bypass input terminals and neutral terminals. See
paragraph 3.2.2 for wiring and termination requirements.
Attention: Mains input N and Bypass input N are connected together inside UPS
For single feed installation, jumpers the input and bypass terminals (L1-L1, L2- L2, L3- L3) must be
installed.
The jumpers are in the cable kit which is supplied with the UPS.
For a detailed view of the UPS terminal block, see Figure 4-6 and Figure 4-7.
5. Connect phase A, B, and C, and Neutral power wiring from output terminals and neutral terminals to the
critical load. See paragraph 3.2.2 for wiring and termination requirements. For a detailed view of the UPS
terminal block, see Figure 4-6 and Figure 4-7.
6. If wiring interface connections, proceed to paragraph 4.5.
WARNING
•
HIGH TOUCH CURRENT. EARTH CONNECTION ESSENTIAL BEFORE CONNECTING SUPPLY. As a result
of the connected loads high leakage current is possible. Connection of the earth (ground) is required for
proper product operation. Do not check UPS operation by removal of the Earth (ground) connection.
•
If there’s input ATS for dual source input or generator as UPS input source, the ATS should be 3-pole;if
with 4-pole ATS, the N interruption time should be less than 50ms.
•
BAT+/BAT- are terminals connected to the battery cabinet, polarity should use red cable,
battery- polarity should use black or blue cable.
•
This device may not be fitted with an optional internal mains disconnection device. If not fitted, it is
essential that the customer install such a device at the installation site near the UPS.
•
Input neutral line should be directly connected to input “N” terminal of UPS wire connection terminal bay
without AC input idle-run.
•
There are protective earthing terminals within the UPS for mains supply, load supply and battery. The
battery cabinet earth protection can be connected either to the UPS or to a common earthing terminal
outside the UPS.
Eaton 9EHD UPS (20-40 kVA, 380/400/415V) Installation and Operation Manual
27
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