رله حفاظت موتور در محیط هایی با خطر انفجار و آتش سوزی مدل G
دارای تاییدیه ( Directive ATEX 94/9/EC )
- حفاظت ایده آل برای موتورهای فشار ضعیف تا سطح ولتاژ 1000Vac
- قابلیت اندازه گیری جریـان ها تـا تـوان 22 کیـلو وات از طـریق ترانـسفورمـــر داخــلی (Internal CT) و بالاتر از آن را از طریق ترانسفورمر خارجی (External CT)
- دقت بالا در تشخیص حالت گرم و سرد موتور و شبیه سازی دمای موتور
- نشانگر ویژه جهت نمایش علت خطا
کاربردها
These relays are applicable for EEx motors with intensities of up to 630A and above, which run in potentially explosive areas such as:
- petrochemical industries
- plastics factories
- etc.
The relay is installed outside the explosive area.
جدول اطلاعات فنی
منحنی تریپ
Cold curve: represents the performance of the relay without any previous current flow, first start.
Warm curve: the tripping times decrease as the current flows, and are adapted to the motor heating condition based on the thermal memory, the warm condition (IEC-255) is reached after a current of 0.9 x IN (motor rated current) flows during 2 hours approximately.
نمودار اتصالات
صفحه خارجی
لوازم جانبی
Current transformers CT
- Up to 1000 A of primary current
- Transformers ratio .../5.
- Seleable connection terminal box, metal brackets for fitting and bus-bar holders included.
Thermistor sensors PTC
PTCEX 70 and PTC 120
- Connected to GL, G,BG, ST o MT relays protect motors against overtemperature.
- PTC. Positive Temperature Coeficient
- PTC 120, for internal mounting. Temperature threshold 120°C.
- PTCEX 70, for external mounting. Temperature threshold 70°C.
