Toshiba 1600EP Series UPS Protection System, Protection Item, Output Overvoltage, Output Overload

UPS Protection System

System Protection Features

The following schematic shows the electrical locations of the protection devices on the UPS.

Overheating Overcurrent

Current Limit

Overload

Overvoltage/

Undervoltage

Input	Low Battery
Abnormal	Level

System Protection Functions

The following charts show the built-in system fault protection functions on all the UPS models.

Built-In UPS Fault Protection Functions

Protection Item	Output Overvoltage		Output Undervoltage	Output Overload
LCD Message	OUT-OV		OUT-UV	OVERLOAD
Cause	Control malfunction;		Control malfunction;	Overload – Short circuit at load
	chip error		Fuse opened; Load issue
Operation Mode	Bypass operation – Chopper and inverter are			Inverter OL: Transfer to bypass;
				Bypass OL: Inverter, chopper
After Fault	stopped
				stopped
Audible Alarm	Yes – Continuous buzzer			See Audible Alarm Functions on
				page 26
Visible Alarm	Red Fault LED on			Inverter OL: Fault lamp off
				Bypass OL: Fault lamp on
Relay Contact	Fault relay closed			Fault relay open;
				Inverter OL: Bypass relay closed
Alarm	Bypass relay closed
				Bypass OL: Bypass relay open
Auto-retransfer		No		Inverter OL: Yes if bypass is OK
				Bypass OL: No

42 1600EP Series Instruction Manual