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安科瑞 師晴晴

1. 概述 Overview

ARD2/ARD2L 系列智能電動(dòng)機(jī)保護(hù)器（以下簡(jiǎn)稱保護(hù)器）能對(duì)電動(dòng)機(jī)運(yùn)行過(guò)程中出現(xiàn)的起動(dòng)超時(shí)、過(guò)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(jìn)行保護(hù)，并設(shè)有 SOE 故障事件記錄功能， 方便現(xiàn)場(chǎng)維護(hù)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(hù)器具 有 RS485 遠(yuǎn)程通訊接口，DC4～20mA 模擬量輸出，方便與 PLC、PC 等控制機(jī)組成網(wǎng)絡(luò)系統(tǒng)。實(shí)現(xiàn)電動(dòng)機(jī)運(yùn)行的遠(yuǎn) 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(hào) Product type

3.功能

■ 起動(dòng)超時(shí)保護(hù) Starting overtime protection 

■ 過(guò)載保護(hù) Overload Protection 

■ 欠載保護(hù) Underload Protection 

■ 斷相保護(hù) Phase failure protection 

■ 不平衡保護(hù) Unbalance protection

■ tE時(shí)間保護(hù) tE time protection （適用于增安型電動(dòng)機(jī)）(suitable for safety-increased motor) 對(duì)于增安型電動(dòng)機(jī)，交流繞組在最高環(huán)境溫度下達(dá)到額定運(yùn)行穩(wěn)定溫度后，從開(kāi)始通過(guò)堵轉(zhuǎn)電流時(shí)記起，- 74 - 直至上升到極限溫度所需的時(shí)間即為 tE時(shí)間。增安型電機(jī)的 tE時(shí)間通常由電機(jī)制造商提供，用戶可以在電機(jī)銘 牌上找到該數(shù)據(jù)。 提供堵轉(zhuǎn)時(shí)在tE時(shí)間內(nèi)斷開(kāi)電動(dòng)機(jī)電源的熱過(guò)載保護(hù)，僅在電動(dòng)機(jī)起動(dòng)完成后投入，帶有獨(dú) 立的延時(shí)計(jì)時(shí) 器。tE保護(hù)特征曲線動(dòng)作延時(shí)對(duì)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(shuō)明： tEp：7 倍額定電流時(shí)允許堵轉(zhuǎn)時(shí)間；IA：堵轉(zhuǎn)電流；Ie：電動(dòng)機(jī)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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