Toshiba T90S3S08KS6XSN, Manual

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Guide Specification – 3-Phase Static Uninterruptible Power Supply
12 March 2009
Operating Mode Transfer mode
Transfer Type
Synchronized Unsynchronized
Automatic
Inverter to Bypass
(Overload, Internal Fault)
Uninterrupted Interrupted
“BYPASS”
switch operated
Inverter to Bypass Uninterrupted
Interrupted
(forced transfer)
Automatic
Bypass to Inverter
(Auto-Retransfer Mode)
Uninterrupted Transfer inhibited
“UPS”
switch operated
Bypass to Inverter Uninterrupted Transfer inhibited
If the bypass source is beyond the conditions stated below, interrupted transfer shall be
made upon detection of a fault condition.
Bypass voltage greater than + 10%, -10% from the UPS rated output voltage.
Bypass frequency e 3 Hz from the UPS rated output frequency.
5.4.2 Overload Capacity in Bypass:
Continuous duty : 125% of the system rated capacity
Overload duty : 1000% of ampere rating for 1 cycle.
5.4.3 Retry function:
When an internal warning/failure has been detected, power flow shall automatically
switch from the main circuit (inverter) to the bypass circuit without interruption to the
load. If the internal warning is cleared, UPS shall automatically switch the power flow
from the bypass circuit to the main circuit (inverter) without interruption.
5.5 Metering, Monitoring, Alarms, and Controls
5.5.1 Status Indicators
The Front Panel shall include LED status indicators for the following states:
Load on Inverter
Battery Operation
Load on Bypass
Overload
LCD Fault
UPS Fault
5.5.2 EPO (Emergency Power Off) Button
The Front Panel shall have an Emergency Power Off button (EPO) located on the front
panel that, when pressed, will shut down the UPS.