1.1K views · 48 shares | VOLTAGE PROTECTION RELAY SELEC 900VPR TERMINAL WIRING #undervoltage #overvoltage #phasesequence | Dronveer electrical testing | Facebook
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1.1K views · 48 shares | VOLTAGE PROTECTION RELAY SELEC 900V…
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Protection Relay for undervoltage, overvoltage, undercurrent,...
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Protection Relay for undervoltage, overvoltage, undercurrent,...
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Xujang on Instagram: "Ini dia Undervoltage Relay DOLD BA9043/003—alat kecil yang sering jadi “penyelamat motor 3 phase”. Fungsinya simpel: dia mantau tegangan 3 phase (400V). Begitu tegangannya drop di bawah batas yang kita set (misal 0.9×Un), relay langsung drop dan nge-release kontaktor, biar motor nggak dipaksa ngeden → arus naik → panas → ujungnya winding jebol. Ada juga delay 0,5–10 detik biar nggak false trip pas drop sesaat, plus hysteresis supaya relay nggak on-off terus dekat titik bata
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Xujang on Instagram: "Ini dia Undervoltage Relay DOLD BA9043…
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