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HOSE AS 3905025 - Caterpillar



3905025 HOSE AS Caterpillar parts HOSE
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Alternative (cross code) number:
CA3905025
390-5025
3905025
Caterpillar 3905025 HOSE AS

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Inverter Shutdown Or Overload
Devices or installations operating in on-line mode with a Bypass AC source.
Illustration 5 g02380458
Operating in On-line Mode DiagramSingle UPS Unit (On-Line Mode)
Illustration 6 g02381120
Overload Curve DiagramIn the event of a UPS shutdown that is initiated by the user or by an internal protective device, the load is automatically transferred to the bypass AC source. If transfer conditions are satisfied, transfer takes place instantly without interruption to the load.Note: Transfer conditions are not satisfied when the bypass AC source characteristics are outside of the tolerances listed below:
Voltage 10%
Frequency as per personalization
Phase sync with inverter 3°In the event of a major transient overload that is greater than 1.65 In, immediate transfer takes place as above, without interruption to the load.The number of possible returns to the inverter is 0 to 255, programmable by personalization. The return to the inverter is automatic when the overload disappears if the number of possible returns has not been reached. If this number has been reached, the load continues to be supplied by the bypass AC source. This operating mode allows start-up of load devices causing high inrush currents.This system requires satisfied transfer conditions. If the conditions are not satisfied, the inverter will current limit to 165% of the rated current for 1 second before stopping.In the event of a small but extended overload such as a continuous level of power exceeding the full rated load, the inverter will continue to supply power for a period of time depending on the magnitude of the overload as described below:
10 minutes for a 125% overload
1 minute for a 150% overload Refer to the overload curve in Illustration 6.In all the above cases, inverter shutdown and supply of the load via the bypass AC source results in the following actions on the control panel:
Inverter light (4) goes off
Buzzer (6) is activated and sounds continuously
Static-bypass light (3) goes on and turns green
The message "LOAD NOT PROTECTED, ON-LINE


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