Fusible, Safety Switch, Heavy Duty, 240 V, 2PST, NEMA 3R

The SIEMENS - HF221NR is a Safety Disconnect Switch, an essential component in industrial electrical systems. This device is intended to break the electrical circuit for equipment maintenance and emergency scenarios. It falls under the broader category of Electrical Supplies and is used with an aim to lessen potential electrical mishaps during regular operations or unforeseen incidents.

• Amps AC: The switch is rated for 30 A, suggesting it's designed to handle this level of electric current within specified conditions.
• Compatible Manufacturer Model Number: The model number HR21 signifies that this product is compatible with safety disconnect switches bearing this particular model number.
• Contact Form: With a 2PST contact form, it controls two circuits and determines whether they are normally open (NO) or closed (NC).
• Duty: 'Heavy' duty label suggests that the switch may be utilized under intense usage and typical applications across different settings.
• Enclosure Type: Its NEMA 3R enclosure type denotes design considerations taken towards resistance against certain environmental factors like dust, water, corrosion and external ice formation.
• Housing Material: Made from steel, providing durability and resistance against environmental conditions.
• HP Rating: It's rated for up-to-100 HP @ 600V referring to maximum power output from linked motors/machinery at given voltage within specified parameters.
• Fusible / Nonfusible: Fusible implies presence of a replaceable fuse aimed at mitigating risks associated with electrical overloads within defined operational limits