Dikonfigurasikan untuk perlindungan penjana dalam sistem siri Multilin 489, GE SR489-P5-HI-A20 (geganti pengurusan penjana SR489) menyediakan pelaksanaan elektrik langsung bagi fungsi pemantauan fasa, bumi dan pengujaan.
Pecahan Akhiran & Matriks Model
489: Geganti pengurusan penjana siri Multilin 489
P5: Sekunder CT fasa 5 A
HI: Kuasa kawalan tinggi (90–300 VDC, 70–265 VAC pada 48–62 Hz)
A20: Output analog 4–20 mA
Paparan: LCD asas (akhiran kosong)
H: Salutan konformal untuk persekitaran lasak
Spesifikasi Perkakasan
Parameter
Spesifikasi
Model
SR489-P5-HI-A20
Jenama
GE Multilin
Asal
Amerika Syarikat
Berat
7.7 kg
Dimensi
Enklosur siri 489 standard
Suhu Operasi
Julat bilik kawalan
Penggunaan Kuasa
Fius berkadar 2.5 A, Littelfuse 215-02.5
Voltan Input
90–300 VDC, 70–265 VAC
Frekuensi
48–62 Hz
Input Fasa
Sekunder CT 5 A
Output Analog
4–20 mA
Paparan
LCD Asas
Piawaian
Pancaran IEEE/ANSI C37.90.1, Kelas A
Kelembapan
Sehingga 95% tanpa pemeluwapan
Fungsi Perlindungan
Lengkung arus lebih bumi (ANSI, IEC, IAC, Flexcurve, Masa Tentu), trip kehilangan pengujaan (2 zon), ambilan pembezaan fasa
Output Denyut
+kWh, +kvarh, –kvarh
Rangkaian Deterministik Profinet / EtherNet/IP
SR489 disepadukan ke dalam rangkaian komunikasi deterministik melalui antara muka terminal belakang. Keserasian flash perisian tegar memastikan penyegerakan dengan sistem penyeliaan. Penskalaan ketumpatan I/O menyokong berbilang input digital boleh diperuntukkan (1–7), manakala kitaran imbasan deterministik mengekalkan pemasaan yang boleh dijangka untuk perlindungan penjana. Fungsi pemutus dan trip dilaksanakan dengan kependaman minimum, mengekalkan operasi deterministik merentasi rangkaian automasi teragih.
Soalan Lazim
S: Bolehkah geganti SR489 ditukar semasa operasi? J: Tidak, geganti memerlukan penyahaktifan kuasa sepenuhnya sebelum dikeluarkan atau dimasukkan bagi mengelakkan pendedahan sesentuh yang tidak selamat.
S: Apakah kelewatan pensuisan dalam konfigurasi berlebihan? J: Pensuisan sesentuh geganti direka dengan ketepatan dalam lingkungan ±50 ms pada 50/60 Hz, bagi memastikan kelewatan minimum dalam persediaan berlebihan.
S: Adakah fius boleh diganti oleh pengguna? J: Ya, geganti ini menggunakan fius Littelfuse HRC SLO-BLO 5x20 mm (model 215-02.5) berkadar 2.5 A, yang boleh dicapai untuk penggantian.
Garis Panduan Pemasangan Lapangan
Pasang geganti dengan kukuh dalam panel kawalan, dengan ruang kelegaan untuk aliran udara.
Lalukan pendawaian CT dan VT secara berasingan daripada kabel komunikasi untuk meminimumkan gangguan.
Pastikan amalan pembumian dan pelindungan digunakan pada input digital dan output analog.
Sahkan pemasangan fius dan tahap penebatan sebelum menghidupkan kuasa.
Nyahaktifkan kuasa kawalan sebelum memasukkan atau mengeluarkan untuk mengelakkan keadaan tidak ditakrifkan.
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