What are the different configurations that clients use the VDC with their UPS?
The VDC can be used as a battery replacement or as a supplement in parallel with a battery bank. Generally there are three configurations that our clients are utilizing the VDC and they are described below: • Ride-through “Bridge” to generator Most of our clients for the VDC are using it as a direct replacement for batteries on the UPS. The VDC provides the back-up energy required by the load when the utility fails and until the emergency stand-by diesel generator is on-line. This “Bridge” time required is typically 6-10 seconds. The VDC can provide the bridge time more reliably and predictably than lead-acid batteries. • Battery “Hardening” and life extension Because the VDC provides a programmable DC voltage it can be paralleled very easily with a bank of batteries. This provides the client with redundant energy storage on the UPS DC bus and the VDC can programmed to be the first line of defense against outages so the batteries are never cycled unless the VDC has exhausted its energy
