Systems that use batteries as a power source, such as an uninterruptible power supply (UPS), require special consideration when specifying overload protection. Square D® 500 Vdc thermal magnetic circuit breakers are designed per UL Supplement SC for use in an ungrounded dc system using an uninterruptible power supply (UPS), with a nominal voltage of 500 Vdc or a maximum (floating) voltage of 600 Vdc.

Features

• Low magnetic trip settings provide increased protection for equipment and batteries during a short-circuit
• Adjustable instantaneous trip readily accessible as a single adjustment on the face of the circuit breaker (except the PAF-DC and PCF-DC which have fixed magnetic settings)

Related Products

• PowerPact® J-frame DC –  From 100 A – 250 A, a versatile solution for ungrounded 500Vdc applications.
• LHL-DC –  Designed for 500 Vdc UPS (ungrounded dc) systems ranging 250 A to 400 A
• MHL-DC –  A circuit breaker that ranges from 450A – 1200A for the protection of ungrounded 500 Vdc systems
• PAF-DC / PCF-DC –  Thermal-magnetic circuit breakers with fixed settings for ungrounded 500 Vdc systems ranging from 1200 A – 2500 A