Vertiv Liebert EXM, Руководство пользователя

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Vertiv™ | Liebert® EXM™ UPS 20-100kVA, 50/60Hz User Manual | 25
3.2.10 Cabling Procedure
Once the equipment has been positioned and secured for operation, and the battery and ground lugs have been
connected (see
3.2.6 - Cable Connections ), connect the power cables as described below. (Study the reference
drawing in 4.0 - Installation Drawings .)
1. Verify that all incoming high and low voltage power circuits are de-energized and locked out or tagged out before
installing cables or making any electrical connections.
2. Remove the front I/O panel to gain easier access to the connections busbars.
3. Connect the facility ground and ancillary ground bus cables to the copper ground busbar located in the middle of the
Liebert
®
EXM behind the output connections. All cabinets in the UPS system must be connected to the user’s ground
connection.
4. Identify and make power connections with incoming cables according to Steps 5 through 8 .
Common Input Connections—Ensure Correct Phase Rotation
5. For common bypass and main inputs, connect the AC input supply cables to the UPS input terminals (A2-B2-C2-N1) and
tighten the connections to 428 lb-in. (48Nm) (M12 bolt). Ensure correct phase rotation.
Split Bypass Connections
6. If a split bypass configuration is used, connect the AC input supply cables to the rectifier input terminals (A1-B1-C1-N1)
and the AC bypass supply cables to the bypass input terminals (A2-B2-C2-N1) and tighten the connections to 428 lb-in.
(48Nm) (M12 bolt). Ensure correct phase rotation.
WARNING
All operations described in this section must be performed by properly trained and qualified electricians
or technical personnel. If any difficulties are encountered, contact Vertiv
™
. See the back page of this
manual for contact information.
AVERTISSEMENT
Toutes les opérations décrites dans cette section ne doivent être effectuées que par des électriciens ou
des techniciens professionnels dûment formés et qualifiés . En cas de difficultés, communiquez avec
Vertiv
™
. Pour obtenir les renseignements de contact, consultez la dernière page de ce manuel.
NOTE
Hydraulic pressure pliers, combinative tools and piston ring pliers should be used to connect AC wiring.
NOTE
The grounding and neutral bonding arrangement must comply with the National Electrical Code and all
applicable local codes.
NOTE
For common bypass and main inputs, the AC input cables must be connected to the bypass terminal
(A2-B2-C2-N1) but not the main input terminal (A2-B2-C2).
NOTE
For split bypass operation, ensure that the busbars between bypass and rectifier inputs are removed. The
neutral line of the bypass input must be connected to that of the rectifier input.