Static Transfer Switch
STS207
User Manual
Page 8 (28)
ELTEK VALERE DEUTSCHLAND ©2009 UM_STS207_WEB_E_R1.4
2.2 Operating modes
The static transfer switch STS is designed for the operating modes “inverter priority” and
“mains priority” alternatively. The consumer load is energized by the priority source as long as that
source works faultlessly.
REMARK: The unit's default setting is "Inverter priority".
The priority source is programmable using "service menu 2" (only available on request for qualified and
skilled service personnel).
2.2.1 "Inverter priority" (default setting)
At the operating mode “inverter priority” the load is switched on inverters during normal operation.
Source “Mains” only is required to energize the
consumer load if source “Inverter” fails or is overloaded
(i. e. distortions by short circuit behaviour or overload).
2.2.2 "Mains priority"
At the operating mode “mains priority” AC mains works as priority source and the inverter
(
as “substitute mains”) as source 2. The STS only switches to inverter(s) when mains failes.
3. Type Range/ Main Data
Type Designation Article Code Nominal
Input
Nominal Input
Frequency
Redundant Circuitry
Supply
STS207-230/230HV 601-070-715.00 230VAC 50 Hz/ 60Hz
(ad
ustable)
19-45V
DC (24V
version)
3.1 Main output data
Nominal output voltage: 230VAC
Nominal output current: 30.4A
AC
Nominal switching capacity: 7kVA
Output frequency: according to the input frequency
For more specific data, see section 8.
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