Operation Modes - Easy UPS 3L Manuals

Normal Mode

The UPS provides power to the connected load from mains. The UPS converts mains to conditioned power for the connected load while recharging the batteries (float or boost charge).

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Power Flow

Battery Mode

The UPS transfers to battery mode if the mains supply fails. The UPS provides power to the connected load from the connected batteries for a finite period. When the mains supply returns, the UPS transfers back to normal mode.

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Power Flow

Static Bypass Mode

The UPS supplies the load with power from the bypass source. If the conditions for normal or battery mode are not met, the load will be transferred from the inverter to the bypass source with no interruption in power to the load.

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Power Flow

Maintenance Bypass Mode

In maintenance bypass mode, the mains is sent via the maintenance bypass breaker (MBB) to the load. Battery backup is not available in maintenance bypass mode.

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Power Flow

ECO Mode

In ECO mode the UPS is configured to use static bypass mode as the preferred operation mode under predefined circumstances. The inverter is in standby in ECO mode and in case of interruption to the mains, the UPS transfers to battery mode and the load is supplied from the inverter.

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Power Flow

Frequency Converter Mode

In frequency converter mode, the UPS presents a stable output frequency (at 50 or 60 Hz) and the static bypass switch is not available.

NOTICE
Risk of equipment damage or load drop In frequency converter mode the UPS cannot run in static bypass or maintenance bypass mode. Before turning the UPS into frequency converter mode, you must contact a Schneider Electric-certified partner to make sure that: the static switch input breaker SSIB and the maintenance bypass breaker MBB are in the OFF (opened) position (Schneider Electric strongly recommends to lock these with a padlock available from Schneider Electric) no cables are connected to the bypass terminals Failure to follow these instructions can result in equipment damage.

NOTICE

Risk of equipment damage or load drop

In frequency converter mode the UPS cannot run in static bypass or maintenance bypass mode. Before turning the UPS into frequency converter mode, you must contact a Schneider Electric-certified partner to make sure that:

the static switch input breaker SSIB and the maintenance bypass breaker MBB are in the OFF (opened) position (Schneider Electric strongly recommends to lock these with a padlock available from Schneider Electric)
no cables are connected to the bypass terminals

Failure to follow these instructions can result in equipment damage.

NOTICE
risk of load drop When the unit output breaker UOB is opened while the UPS is in frequency converter mode, the load will not be transferred, but will be dropped. Failure to follow these instructions can result in equipment damage.

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Power Flow

Autostart Mode

DANGER
Hazard of electric shock, explosion, or arc flash Always perform correct Lockout/Tagout before working on the UPS. A UPS with autostart enabled will automatically restart when the mains supply returns. Failure to follow these instructions will result in death or serious injury.

When autostart is enabled, the UPS automatically restarts the inverter and bypass when the mains supply returns. By default autostart is enabled.

NOTE: If autostart is disabled, the inverter and bypass will not restart automatically when the mains return.

LBS Mode (Optional)

When LBS mode is enabled, the output of two independent UPS systems (single system or parallel systems) will be synchronized. This requires installation of synchronization cables between the two UPS systems. The synchronization of the output is not supported when both UPS systems are in static bypass mode or maintenance bypass mode.