TOSHIBA
5.0
Operating the UPS
5.1
Operation Modes (Cont'd)
5.1.3
Circuit-bypass Mode
5 - 3
5-20P
Fuse
= power flow
Power
input
plug
Circuit
breaker
+
UPS batteries
UPS
main
circuit
UPS
receptacles
(rear panel)
UPS batteries
UPS
main
circuit
= power flow
(rear panel)
receptacles
UPS
+
plug
input
Power
5-15R
5-15P
Fuse
Output Xfmr
(Plus Series)
_
Bypass circuit
Bypass circuit
Power flow in circuit-bypass mode for 1500, 2000, and 2400 VA Models
_
Output Xfmr
(Plus Series)
If the UPS unit is overloaded or develops an internal fault, the power flow is
automatically switched from the unit's main circuit to the bypass circuit mode.
Power flow through the bypass is shown in the above illustrations. This change-
over occurs automatically in approximately 4 milliseconds. The switching period
is not long enough to cause interruptions to occur in most UPS equipment loads.
The energy flow must be transferred manually from the UPS's bypass
circuit back to the inverter circuit after first correcting the fault.
Toggle the
STOP/RUN switch (on the unit's front panel) first to STOP and then back to RUN.
This procedure resets the UPS and transfers back to inverter. On the front panel,
the LED labeled "FAULT" should be off. The "INVERTER" LED and "AC LINE"
LED should be on (See Section 9.5 or 9.6 Panel Layout).
Power flow in circuit-bypass mode for 600, 800, 1000, and 1200 VA Models
two 5-15R for (1500VA)
one 5-15R, one 5-20R
for (2000 and 2400 VA)
L5-30P for
(2400VA)
Summary of Contents for 1400RE Series
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