ABB REQ650 Product Manual
Also see for Relion REQ650: Applications manualCommissioning manualProduct guideOperation manualCommissioning manual
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Contents
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Table 28. Thermal overload protection, one time constant LPTTR (26)Function Range or value AccuracyReference current (0-400)% of IBase ± 1.0% of InReference temperature (0-600)°C ± 1.0°COperate time:2 22 2ln pbI It I It æ ö-ç ÷= × ç ÷-è øEQUATION1356 V1 EN (Equation 1)I = actual measuredcurrentIp = load current beforeoverload occursIb = base current, IBaseTime constant t = (0–1000) minutesIEC 60255-8, class 5 + 200 msAlarm temperature (0-200)°C ± 2.0% of heat content tripTrip temperature (0-600)°C ± 2.0% of heat content tripReset level temperature (0-600)°C ± 2.0% of heat content tripBreaker protection REQ650 ANSI 1MRK 505 269-BUS -Product version: 1.1 Issued: April 2011ABB 61 |
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