Frequently Asked Questions
Q: What is the main application of the HH15 (QSA) series?
A: It is a switch-fuse combination used for circuit isolation and short-circuit protection in power systems up to 1250A.
Q: How many poles are available for these switches?
A: The series supports 2-pole, 3-pole, and 4-pole configurations depending on the specific model requirements.
Q: What is the difference between QP, QA, and QSA models?
A: QSA includes a fuse with series contacts; QP has no fuse and parallel contacts; QA has no fuse and series contacts.
Q: What are the rated insulation voltages for this series?
A: For a working voltage of 400V, the insulation voltage is 660V. For 660V working voltage, it is 1000V.
Q: Can I add auxiliary contacts to the switch?
A: Yes, models can be ordered with no auxiliary contacts, 1 pair, or 2 pairs of auxiliary contacts.
Q: What is the mechanical life expectancy of the smaller units (up to 125A)?
A: The units up to 125A are rated for a mechanical life of up to 15,000 operations.
Mingri Electric
