CAUTION
To reduce the risk of a fire, the rated current of the circuit breaker must not be
less than the specifications shown in Table
7: Input/output ratings and external
cabling recommendations for the 93T UPS 15–80 kVA.
Balance the loads equally between the phases. Refer to Table
7: Input/output
ratings and external cabling recommendations for the 93T UPS 15–80 kVA.
Source protection for the AC input to bypass must suit the characteristics of the
load and take into account effects such as inrush or starting current.
Bypass and output overcurrent protection switches must be provided by the
user.
For the wiring diagram of the UPS, refer to Section
Section 3.2 Looking inside
the UPS system.
44..33..44 UUPPSS ssyysstteemm iinntteerrffaaccee wwiirriinngg pprreeppaarraattiioonnss
Connect all control wiring for features and options to the user interface terminal block inside the UPS.
WARNING
Do not connect the feedback contact of the contactor to the mains-related
circuits. Reinforced insulation of the feedback contact is required.
After you plan and prepare the installation, carefully read and understand the following guidelines.
• The customer must provide all interface wiring.
• When you install internal interface wiring to MiniSlot terminals, route the wiring through the internal
opening in the MiniSlot communication bay.
• All signal inputs require an isolated normally-open contactor or switch with a rated value of 24 VDC
and 20 mA at minimum connected between the alarm input and the dry node. The customer must
provide all control lines, relays, and switch contactors. Use twisted-pair cables for each alarm input
and dry node.
• LAN and telephone drops for use with MiniSlot cards must be provided by facility planners or the
customer.
• The Remote EPO feature opens all switchgear in the UPS cabinet and isolates power from your critical
load. Local electrical codes may also require tripping upstream protective devices to the UPS.
• The Remote EPO switch must be a dedicated switch not tied to any other circuits.
• A jumper cable must be connected between pins 3 and 4 on CN10, if the normally-closed (NC)
Remote EPO contact is used.
• Remote EPO wiring must be a minimum of 0.75 mm
2
and a maximum of 2.5 mm
2
.
• The distance between the Remote EPO and the UPS must not exceed 150 meters.
• Alarm relay contacts have a maximum current rating of 5 A and a switched voltage rating of 30 VAC
(RMS) and 30 VDC.
• Alarm relay wiring must be a minimum of 0.75 mm
2
.
EATON 93T USER’S AND INSTALLATION GUIDE 614-40270
-
December 2023 www.eaton.eu 3366
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