Series OHPC and CHPC PowerCommand automatic transfer switches from Cummins Power Generation Inc. are the industry's first transfer switches to achieve UL-listed 10-cycle and 30-cycle withstand and closing (short-time) ratings. The OHPC open transition and CHPC closed transition switches demonstrated unprecedented short-time ratings of 25 kA at 10 cycles for 125 to 260-A switches, 42 kA at 30 cycles for 300 to 600 A, and 50 kA at 30 cycles for 800-A switches in UL tests. The switches continued to operate safely at full load, even after testing.
The UL listing provides consulting and specifying engineers independent assurance that the OHPC and CHPC transfer switches offer the industry's highest performance level, particularly for standby power systems requiring selective coordination.
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