22. UPS Protection System

22.1 System Protection Features

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

MCCB

Input

Line Filter

Power

 

 

Surge

 

Absorber

Input

Abnormal

Overheating

Overcurrent

Current Limit

 

 

 

 

 

 

 

Overload

Bypass

*Static Switch

 

 

Isolation

 

 

 

Input

 

Output

Transformer

Fuse

 

Fuse

Output

Rectifier/

Inverter

Chopper

Power

 

Batteries

+

* Switches are

 

 

 

 

 

 

solid state

Power Flow

Negative

devices.

 

 

Bus

Overvoltage/

Low Battery

 

 

Undervoltage

Level

 

 

 

22.2 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

EEPROM 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 33

 

 

 

 

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

 

 

 

 

46

1600XP Series Installation and Operation Manual

Page 56
Image 56
Toshiba 1600XP operation manual UPS Protection System, System Protection Features, System Protection Functions

1600XP specifications

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