Voltage Dip-Proofing Inverter DPI54S / 54L Series Models 120 & 208/230V 50/60Hz Installation & Service Manual
▲Introduction
●The reliability of electrical power to industry is in general very high, nevertheless, voltage sags and short power interruptions or voltage dips occur. These instabilities are caused by short circuits, lightning strikes on overhead power lines and heavy load switching. The duration of such faults is generally shorter than one second.
●Most plant can ride through such voltage dips by virtue of their mechanical and electrical inertia. However, this is not the case with electrically held-in contactors and relays that control the machinery. Contactors typically drop out from 5ms to 20ms after power is removed. Each short voltage dip now becomes a power failure and the plant must be restarted. This can be complicated, time-consuming and costly.
●SWITCHING SYSTEMS’ VOLTAGE DIP- PROOFING INVERTERS are designed to maintain the switchgear control voltage during voltage dips, effectively keeping the plant connected. The stored electrical and magnetic energy is allowed to flow, supporting the mechanical inertia of the machinery. When the power is restored after a short voltage dip, the plant is still running at near synchronous speed, the inrush currents will be small and the stress to the system minimal.
●Historically, this problem has been addressed by using DC contactors, latched contactors and intelligent controls such as PLC’s. These systems are complex and expensive and do not provide a solution for equipment already in existence. The current approach to this problem has been to employ intelligent control systems which provide a curative solution. In contrast, the Voltage-Dip Proofing Inverter, provides a preventative solution.
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DPI54S6.6mF120V6A 、 DPI54S13.2mF120V6A 、 DPI54S19.8mF120V6A 、 DPI54S39.6mF120V8A 、 PI54L33mF120V25A 、 DPI54L66mF120V25A 、 DPI54L99mF120V25A 、 DPI54L198mF120V25A 、 DPI54L297mF120V25A 、 DPI54L396mF120V25A 、 DPI54L495mF120V25A 、 DPI54L594mF120V25A 、 DPI54L693mF120V25A 、 DPI 54S / 54L Series 120V 、 DPI 54S / 54L Series 208 / 230V 、 DPI54S4.08mF230V6A 、 DPI54S6.12mF230V6A 、 DPI54S12.24mF230V8A 、 DPI54L15mF230V25A 、 DPI54L30mF230V25A 、 DPI54L45mF230V25A 、 DPI54S2.04mF230V6A 、 DPI54L90mF230V25A 、 DPI54L135mF230V25A 、 DPI54L180mF230V25A 、 DPI54L225mF230V25A 、 DPI54L270mF230V25A 、 DPI54L315mF230V25A 、 DPI54 Series 、 DPI54S 、 DPI54L 、 DPI54 |
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2019/8/21 |
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Ver 1.0 |
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490 KB |
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