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Eaton 93E Generation 2 UPS 100-200 kVA
(380/400/415V)
If the UPS becomes overloaded or unavailable, the UPS switches to the bypass
mode. The UPS automatically returns to the double conversion (normal) mode
when the overload condition is cleared and system operation is restored within
specified limits.
If the UPS suffers an internal failure, it switches automatically to the bypass
mode and remains in that mode until the failure is corrected and the UPS is
back in service.
3.2.2
When the UPS is operating in the high-efficiency (HE) mode, commercial AC
power is supplied directly to the critical load through the internal bypass with the
power module in a standby state. If a commercial power brownout, blackout,
overvoltage, undervoltage, or out-of-tolerance frequency condition occurs the
system forward transfers to the double-conversion (normal) mode, or stored
energy mode. When the input line returns to normal operating range, the UPS
returns to HE operation. For charging batteries in HE mode, the UPS will revert
to the double-conversion (normal) mode to charge the batteries, then return to
the HE mode when the charge cycle is complete.
HE mode, if selected, is a normal operating mode, and not an alarm condition.
While the UPS is in this mode, the NORMAL light on the front display
illuminates.
3.2.3
The critical load is not protected from voltage or frequency fluctuations or
power outages while the UPS is in the bypass mode.
The UPS automatically switches to the bypass mode if it detects an overload,
load fault, or internal failure. The bypass source supplies the commercial AC
power to the load directly. The UPS can also be commanded to transfer to the
bypass mode manually.
4
Figure
operating in the bypass mode.
©
Eaton Corporation plc 2019. All rights reserved.
High-efficiency mode
Bypass mode
shows the path of electrical power through the UPS system when
CAUTION
Revision: 002
Document ID: P-164000848
User's and installation guide
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