Duplex VFD Control Panel for Booster Pump Systems in the Philippines

The duplex VFD control panels JOHOB supplies are built by Chutian using Inovance variable frequency drives. Inovance is a mainstream industrial drive line, which matters for two reasons that show up years after commissioning: parameter documentation is available in English, and drive replacement does not require re-engineering the whole panel around a discontinued proprietary controller. The panel arrives factory-wired and factory-tested rather than as a box of components assembled at the jobsite. JOHOB sources the panel and the pumps from the same supply chain, which is why we prefer to quote the panel together with the commercial booster pumps we supply where the customer has that flexibility. We supply booster pumps from CDL, which builds engineered vertical multistage pumps, and from established brands including Grundfos, DAB, and Speroni. When the panel and the pumps come from a single quotation, motor data, drive sizing, and control logic are matched once at the quoting stage instead of being reconciled during commissioning. For retrofit work where the pumps are staying, we quote the panel on its own against the existing motor nameplate data.

A duplex VFD control panel is specified against the pumps it will control and the environment it will sit in, so a quotation moves fastest when the enquiry carries six data points. First, the motor nameplate data for both pumps: kilowatt rating, full load current, voltage, and phase, since drive sizing follows full load current rather than kilowatts alone. Second, the number of pumps and whether a third pump or a jockey is planned later, because expansion is far cheaper to design in than to retrofit. Third, the target discharge pressure and the range the building can tolerate. Fourth, the mounting location: an air-conditioned pump room, an open utility deck, or an exposed rooftop each call for a different enclosure rating, and outdoor mounting in Philippine conditions needs an ingress-rated build like our IP55 outdoor VFD panel for exposed mounting. Fifth, the incoming supply arrangement and whether the panel must coordinate with a generator changeover. Sixth, any building management system integration or remote alarm requirement. Send what you have; where drawings or nameplate photos are incomplete we will tell you exactly which figure is missing rather than guessing and quoting the wrong drive. Retrofit buyers replacing a failed panel on a live booster pump set, the situation covered in our

condominium booster pump replacement guide for Manila, should send motor nameplate photos with the first message so the panel can be quoted against the pumps that are staying.