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Eaton 93PM-L 20 – 60 kW (208V) UPS Installation and Operation Manual P-164000711—Rev 03
•
Recommended wire sizes are based on NFPA National Electrical Code
®
(NEC
®
)70 Table 310.15(B)(16) 75°
C ampacity with 40°C ambient correction factors.
•
The neutral conductor is sized the same as the phase conductor for balanced and resistive loads. Non-
linear loads, up to the maximum of 1.5x the load current, require a larger neutral conductor and should be
sized in accordance with NFPA NEC 70 Article 310.15(B)(5).
•
Connect rectifier input to a 3 wire, grounded Wye source. A neutral conductor is not used from the rectifier
source.
•
Supported single source, single or dual feed power sources:
–
3-wire grounded Wye (TN,TT) – Rectifier Input
–
4-wire grounded Wye (TN,TT) – Bypass Input
•
Supported dual source, dual feed power sources:
–
3-wire grounded Wye (TN, TT) – Rectifier Input
–
4-wire grounded Wye (TN, TT) – Bypass Input
CAUTION
SINGLE HIGH IMPEDANCE GROUND SOURCE – In North American installations, the neutral conductor from
the high impedance ground source of supply CANNOT be used.
•
Phase rotation must be clockwise starting with phase A (rotation A, B, C).
•
If installing an external maintenance bypass, all feeds to the UPS including the Rectifier Input Breaker (RIB)
(if installed) must have a service disconnect independent of the maintenance bypass power path. Most
maintenance bypass solutions provide UPS input feeds derived from but isolated from the maintenance
bypass power path. If the maintenance bypass solution being installed does not provide such functionality,
DO NOT use a single feeder breaker to supply both the UPS and the maintenance bypass.
•
The Eaton 93PM-L UPS provides backfeed detection and protection through a shunt trip mechanism of the
bypass input breaker.
!
IMPORTANT
If an Eaton 93PM-L UPS is ordered with:
–
a 3 or 4 breaker SIAC-B, the system as shipped from the factory will have the bypass protection pre-wired
and tested.
–
a 3 or 4 breaker wall-mount or floor mount bypass optional accessory kit; it will be packaged with all of the
accessories for the bypass input breaker (BIB) but must be field installed.
NOTE
During installation, the installer needs to connect the Bypass Shunt Trip interface
connections. See paragraph
.
–
a 2-breaker bypass, the customer must provide their own bypass, or if the customer does not use a
bypass, the upstream bypass input source must have a 48VDC shunt trip installed and wired back to the
UPS to provide backfeed protection. The customer is also required to provide special electrical labeling
outlined in the electrical code.
NOTE
During installation, the installer needs to connect the Bypass Shunt Trip interface
connections. See paragraph
.
Summary of Contents for 93PM-L Series
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