Top Brand Variable Speed Drive - VSD
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In order to ensure operation during periods of overload, it must be possible to program the variable speed drive to periodically reduce its output current to a programmed value during periods of excessive load. This allows the variable speed drive to continue to run the load without tripping.
Programmable Sleep Mode shall be able to stop the variable speed drive. When its output frequency drops below set “sleep” level for a specified time, when an external contact commands that the variable speed drive go into Sleep Mode, or when the variable speed drive detects a no-flow situation, the variable speed drive may be programmed to stop. When the variable speed drive’s speed is being controlled by its PID controller, it shall be possible to program a “wake-up” feedback value that will cause the variable speed drive to start. To avoid excessive starting and stopping of the driven equipment, it shall be possible to program a minimum run time before sleep mode can be initiated and a minimum sleep time for the variable speed drive.
The variable speed drive shall have temperature controlled cooling fan(s) for quiet operation, minimized losses, and increased fan life. At low loads or low ambient temperatures, the fan(s) may be off even when the variable speed drive is running.
Two programmable relay outputs, Form C 240 V AC, 2 A, shall be provided for remote indication of variable speed drive status.
Variable Speed Drive
Address: No. 2 Xuwu Village Xixiang baishi, Bao'an District, Shenzhen, Guangdong, China, 518000
Tel: 8675528480212
All variable speed drive faults shall be time stamped to aid troubleshooting. It shall be possible to program maintenance reminders based on date and time, variable speed drive running hours, or variable speed drive operating hours.
Variable speed drive shall have standard USB port for direct connection of Personal Computer (PC) to the variable speed drive. The manufacturer shall provide no-charge PC software to allow complete setup and access of the variable speed drive and logs of variable speed drive operation through the USB port. It shall be possible to communicate to the variable speed drive through this USB port without interrupting variable speed drive communications to the building management system.
The variable speed drive shall incorporate a programmable motor preheat feature to keep the motor warm and prevent condensation build up in the motor when it is stopped in a damp environment by providing the motor stator with a controlled level of current.
