Other Design Features:

• LISTED Power Supply (BBS) for use with Traffic Signal Equipment. File: QQIJ, E218390
• Thermally-controlled cooling fan
• Automatic utility line power bypass when utility line voltage is outside the range of 100 to 130 VAC ±2 VAC
• Automatic inverter mode dropout when utility line power has been restored above 105 VAC ±2 VAC for more than 30 seconds
• Lightning surge protection compliant with IEEE 587/ANSI C.62.41
• Completely connectorized system
• LED indication for Inverter Power, Low Battery, High Temp, & Overload
• LED for Battery Charger On & Full plus Check Batteries
• LED Battery Voltage Indicator & Voltage Test Points
• LED for Relay A (On Batt), Relay B (Low Batt), and  Relay C (2 hour Time)
• Two Terminal blocks provide access to BBS Form C dry relay contacts
• Low Batt voltage threshold (Relay B) is adjustable
• Inverter Run Time Meter w/reset
• Inverter Event Counter Meter w/reset

Unit Protection: 

• Automatic electronic short circuit/overload protection
• Automatic over temperature shutdown
• Input and Output circuit breakers

Battery Protection:

• Automatic low battery shutdown at 42 VDC 
• In-line battery cable fuse
• Remote temperature sense cable
• Temperature compensated battery charging system - shuts off over 50°C (122°F)

Communication:

• RS232 Communications port provides local programming, BBS status, and download of event buffer via a Windows based PC.