安科瑞 師晴晴
1. 概述 Overview
ARD2/ARD2L 系列智能電動機保護器（以下簡稱保護器）能對電動機運行過程中出現(xiàn)的起動超時、過載、斷 相、不平衡、欠載、接地/漏電、阻塞、短路、外部故障等多種情況進行保護，并設(shè)有 SOE 故障事件記錄功能， 方便現(xiàn)場維護人員查找故障原因。適用于煤礦、石化、冶煉、電力、船舶、以及民用建筑等領(lǐng)域。本保護器具 有 RS485 遠程通訊接口，DC4～20mA 模擬量輸出，方便與 PLC、PC 等控制機組成網(wǎng)絡(luò)系統(tǒng)。實現(xiàn)電動機運行的遠 程監(jiān)控。 Smart Motor Protector ARD2 Series (hereinafter referred to as Protector) can protect the motor from timeout startup, overload, phase failure, unbalance, under-load, earth leakage, blocking,short circuit, external fault and other abnormalities during the running and provide the SOE fault event recorder to help maintenance stuff find causes. It is applicable for coal mines, petrochemical industry, metallurgical industry, power industry,shipping, civil building and other fields. It is equipped with the RS485 remote communication interface and the DC4-20mA analog output, which is convenient to form a network system together with control machines like PLC and PC to realize the remote monitoring of motor.
2 產(chǎn)品型號 Product type
3.功能
■ 起動超時保護 Starting overtime protection
■ 過載保護 Overload Protection
■ 欠載保護 Underload Protection
■ 斷相保護 Phase failure protection
■ 不平衡保護 Unbalance protection
■ tE時間保護 tE time protection （適用于增安型電動機）(suitable for safety-increased motor) 對于增安型電動機，交流繞組在最高環(huán)境溫度下達到額定運行穩(wěn)定溫度后，從開始通過堵轉(zhuǎn)電流時記起，- 74 - 直至上升到極限溫度所需的時間即為 tE時間。增安型電機的 tE時間通常由電機制造商提供，用戶可以在電機銘 牌上找到該數(shù)據(jù)。 提供堵轉(zhuǎn)時在tE時間內(nèi)斷開電動機電源的熱過載保護，僅在電動機起動完成后投入，帶有獨 立的延時計時 器。tE保護特征曲線動作延時對照表如表 22 所示，曲線圖如下圖所示。 After the AC winding reaches the rated operation stable temperature at maximum ambient temperature for safety-increased motors, the desired time from the beginning of locked-rotor current to the time rising to limiting temperature is tE. The tE time of safety-increased motors is usually provided by the motor manufacturers, and users can find the data on the motor nameplate. When providing locked-rotor and within the tE time, disconnect the thermal overload protection of electric motor, only after the motor starting is completed, the independent delay timer can be applied. Delay timer with independence。 tE protection characteristic curve action delay table shown in Table 22, and curve diagram as shown below.
說明： tEp：7 倍額定電流時允許堵轉(zhuǎn)時間；IA：堵轉(zhuǎn)電流；Ie：電動機額定電流。 tE protection delay and locked-rotor current ratio IAII.'s current-time characteristic curve tEp: Allow locked-rotor time when under 7 times rated current; IA: locked-rotor current; Ie: rated current of motor.
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