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Page View 9174 |
Product Information : |
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Product Name: |
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Starting & Safe deactivating |
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Product Category: |
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ไฟฟ้าและอิเล็กทรอนิกส์
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Product Sub-Category: |
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Low-Voltage Controls and Distributions
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Brand: |
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SIEMENS |
Product Type : |
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สินค้า, ผลิตภัณฑ์
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Short Description : |
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A highlight of the Safety Integrated "safety package" is the 3RA71 fail-safe load feeder. |
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Safety-related controls
Starting & Safe deactivating ? SIRIUS Failsafe load feeders
A highlight of the Safety Integrated "safety package" is the 3RA71 fail-safe load feeder. This combines the features of our electronic safety combinations with the advantages of the SIRIUS modular system. The combination of fail-safe electronics in conjunction with the combination of a circuit-breaker and two series-connected motor contactors produces a complete, pre-mounted, wired, tested and certified fail-safe load feeder which, depending on the model, fulfils Cat. 3 or 4 according to EN 954-1.
For small machine tools and processing machines with a single motor, such as a mill, the fail-safe load feeder combines the function of either a fuseless or fuse-bonded motor starter, with that of an "EMERGENCY STOP" shutdown. In the case of the fuseless load feeder version, the output is protected against overloads and short circuits by the circuit-breaker and operating personnel are protected by the fail-safe electronics in the event of an "EMERGENCY STOP" shutdown. And if your machine/plant is equipped with more than one motor, simply interconnect several 3RA7 fail-safe load feeders.
These are then actuated in a group shutdown from a single "EMERGENCY STOP" switch. Cascading and expansion options mean that safety logics can be expanded simply and easily. Wiring is reduced to a minimum due to the "single-wire connection" thus reducing both labor and costs. Optimum protection of the drives, as well as optimum switching, can be achieved using the "Normal switching duty" option.
Product features:
An overview of the advantages of the 3RA71 fail-safe load feeder:
- Can be used up to Cat. 4
- Stop categories 0 + 1 available
- Expandable and cascadable
- Connection of conventional and electronic sensors
- Short-circuit-proof to 50 kA
- Integral overload and short-circuit protection
- AC-1, AC-3 switching capacity
- Outgoing feeders up to 11 kW, assignment type 2
- Fuseless or fuse-bonded configuration
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