Specifications

U-ENS00011_99AtypSMSSpec_Rev2.doc

U-ENS00011 Rev2 12/9/08

(typically .04 to .08 VDC/cell higher than the specified float level). Upon completion of

the timer count, the converter output voltage shall return to the specified float voltage

(typically 2.25 to 2.27 VDC/cell). An Auto Equalize charge operation is also pro vided

follo wing AC input restoration and subsequent to the power walk in function. This

equalizing charge will occur until the battery target voltage is reached (condition is met

to end equalizing charge), in which f loat voltage will be applied.

D. Temperature Control Battery Charging

The UPS shall have as standard a battery temperature compensation function allowing

the converter voltage to fold-back to a safe value in the event the battery system

temperature reaches a pre determined (dangerous) level. Initiation will be by dry contact

input from thermocouple sensor (User supplied)

E. DC Input Protection

The DC input circuit shall be protected by a DC circuit breaker . The DC circuit breaker

allows complete interruption of DC current and isolation of the UPS Module DC input

and the battery system.

The DC Circuit breaker shall incorporate an UVR and auxiliary contact connections to

the UPS Module control for prevention of incorrect start up and shutdown sequencing.

The DC Circuit Breaker shall be provided as standard equipment.

F. Ripple Voltage

The DC (battery) bus RMS ripple voltage shall be less than 2% of the UPS nominal DC

voltage level at 100% load. This shall provide for maximum battery life.

G. Battery Self Test (Diamond-Sense)

For a short duration, a small po wer discharge fro m the battery is automatically

performed. The UPS module, from this small power discharge, evaluates the

degradation of the system battery. The following advantages are achieved:

1. The Diamond-Sense Battery Self-Test function can be performed even when load

is on inverter.

2. Due to the short duration small power discharge, there is no effect to battery life

expectancy.

3. The small power discharge has negligible effect on the overall battery backup time.

The small power that is discharged by the battery will quickly be replenished.

The Battery Self Test will automatically occur every 720 hour interval. An event alarm will

occur and be displayed if battery abnormalities are detected.

2.2.2 Inverter

A. General

The inverter shall generate AC powe r derived from DC power supplied from the

converter or system battery. The inverter shall be capable of pro viding rated output as

specified while operating from any DC voltage within the battery operating range. The

inverter shall utilize the following technology: