Setup > St.sw. > High-Level Setup; Setup > St.sw. > Overload Hysterisis - Gamatronic Centric 50 kVA User Manual

6.1.4.5 Setup > ST.SW. > HIGH-LEVEL SETUP
These functions are related to the static switch.
6.1.4.5.1 Setup > ST.SW. > Hi-level setup >
BYPASS FORCED/CONTROLLED
When the UPS wants to move to bypass mode, this function determines whether the controller
will check the quality of the bypass voltage or not, before moving to bypass.
Choose "Forced" if you want the UPS to move to bypass regardless of the quality of the bypass
voltage.
Choose "Controlled" if you want the UPS to determine if the bypass voltage is acceptable before
transferring to bypass. In this case, if the bypass voltage is not acceptable, the UPS remains in
inverter mode. The range of what is an "acceptable" bypass voltage can be set to "wide" or
"narrow". See section 6.1.4.5.6 below.
6.1.4.5.2 Setup > ST.SW. > Hi-level setup >
PC CONTROL ENABLE/DISABLE
Determines whether Static Switch functions – such as moving the system from inverter mode to
bypass mode or from bypass mode to inverter mode – can be accomplished from the display
screen.
6.1.4.5.3 Setup > ST.SW. > Hi-level setup >
CONTROL PANEL ENABLE/DISABLE
Enables / disables the buttons on the controller's rear panel (transfer to bypass/inverter; alarm
mute).
6.1.4.5.4 Setup > ST.SW > Hi-level setup >
ST.SW. INTEGRATION TIME
This option controls the amount of time the static switch waits before transferring the load to
bypass after detecting that the inverter output voltage is out of range. The "normal" setting is 3
ms, the "extended" setting is 20 ms.
6.1.4.5.5 Setup > ST.SW. > Hi-level setup >
ST.SW. SYNCHRONIZATION SENSITIVITY
The UPS prevents transfers from inverter to bypass if there is a significant difference between the
inverter output voltage and the bypass voltage. This option lets you control the degree of
sensitivity of the UPS to such a voltage difference. The options are:
"Regular" sensitivity means that the UPS can move to bypass for a difference up to 20 V.
"Extended" sensitivity means the UPS can move to bypass for a difference up to 30 V.
6.1.4.5.6 Setup > ST.SW. > Hi-level setup >
BYPASS VOLTAGE RANGE
This option relates to the "Forced / Controlled Bypass" option described in section 6.1.4.5.1
above. When "Controlled Bypass" is in effect, this option determines if the voltage range criterion
used to determine an acceptable bypass voltage is "wide" (187 – 265 Vac) or "narrow"
(207 – 253 Vac).
6.1.4.6 Setup > ST.SW. > OVERLOAD HYSTERISIS
This option sets the load level at which the load returns to the inverter after being transferred to
bypass due to an overload. The return of the load to the inverter is blocked until the load level has
decreased to this user-specified level.
CENTRIC User Guide, Release 0.3
Gamatronic Electronic Industries Ltd.
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