FLYWHEEL TECHNOLOGY
UPS FAQ
Q: I normally operate at 60% load, how much back-up time do I have?
A: Operating the unit at lower loads will extend the back-up time. The graph below illustrates the Load vs. Back-up time characteristic. The graph can also be used to estimate back-up times when units are paralleled.
Q: Does the product need external AC power?
A: Yes, it needs AC power from the output of the UPS for the fans, controllers and vacuum pump.
Q: What happens if the external AC power is lost?
A: There is a critical power supply that keeps the rotor assembly fully suspended; all other components are powered off --- fans, PC panel, vacuum pump, etc.
Q: Does the unit need to be bolted down?
A: Yes, each unit ships with the hardware necessary.
Q: Can the unit be installed in a (Seismic) Zone 4 environment?
A: Yes, we plan to have it evaluated for OSHPD certification.(please double check that this was the intended meaning of the sentence fm)
Q: Can the unit be installed on a raised floor?
A: Yes, a floorstand may be used to accommodate the unit.
Q: What safety, EMI and other agency certifications do you intend to acquire?
A: The VDC is presently listed for the USA and Canada. It also bears the CE mark when shipped internationally.
Q: Is a vacuum pump necessary?
A: Our flywheel requires a vacuum pump. We use an industrial pump that is very high quality. The vacuum pump does require the oil to be changed annually to keep it in good working condition.
Q: What is high/low cycle?
A: High/Low cycle refers to the specific use of the product. High cycle applications are where the product is cycled often, multiple times per day. An example of this would be in rail applications for voltage support and energy recovery at rail substations where the product cycles whenever a train arrives or departs (possibly a cycle every two to three minutes).
Low cycle applications would be your typical UPS application, where the product goes through less than 100 full discharges per year. The unit may experience frequent short discharges, but infrequent full discharges.
CRANE REGEN FAQ:
Q: Does the VYCON REGEN include associated electronics or is it just the flywheel?
A: The VYCON REGEN system is a complete system and only requires connection to the DC bus of the hoist motor inverter, connection to ground, AC power for VYCON REGEN auxiliaries, and connection of a current sensor to one of the hoist motor phases.
Q: Does the VYCON REGEN system also work with the trolley and gantry motions of RTG cranes?
A: The VYCON REGEN system operates only with the hoist motor as the hoist motor regenerative braking power provided is the largest and the trolley and gantry motor drives do not offer this opportunity.
Q: What happens when the RTG crane is shutdown? Does the REGEN system maintain stored energy?
A: The VYCON REGEN system will consume its own generated power to maintain the magnetic bearings activated. This feature will allow for the flywheel system to slow down in speed until 0 rpm is reached. Typically, it will take 1.5 hours to reach 0 speed from full operating speed.