UPS HOT SYNC Capability

[joan271273]

One UPS vendor POWERWARE, has a HOT SYNC technology that allows for a paralell redundant operation.
Is someone familiar with this technology ( practical experience).

 

[watsonk]

Hot Sync is a patented process by which the two UPS's are controlled via their internal software to share load within 5% of each other. This works without any control wires connected between the modules. There are wires that interconnect the UPS's with the Tie Cabinet, however they are merely status wires that allow one module to know the status of the other. They are not required for parallel redundant operation.

 

[jbartos]

Suggestions:
1. Visit

http://www.thomasregister.com

type Power Supplies: Uninterruptible (UPS)
which will return 277 Companies; some of them offer the feature you are referring to, often under different names.
2. Look more for "redundant, redundancy, e.g. APC American Power Corporation product "Silcon"", "selfmonitoring", "active standby", etc.
3. Also, visit

http://www.delphion.com

for
US6160722: Uninterruptible power supplies with dual-sourcing capability and methods of operation there of
by POWERWARE CORP.
An uninterruptible power supply (UPS) includes an AC source port configured to connect to an AC power source, a DC source port configured to connect to a DC power source and a load port configured to connect to a load. A rectifier circuit is operative to selectively couple the AC source port to first and second voltage busses through a first inductance. An inverter circuit is operative to selectively couple the load port to the first and second voltage busses through a second inductance. A bidirectional DC source coupling circuit is operative to couple the DC source port to the first and second voltage busses to provide directional power transfer therebetween, preferably such that a voltage at the DC source port is maintained in a substantially fixed proportion to first and second DC voltages at respective ones of the first and second voltage busses. In one embodiment, the bidirectional DC source coupling circuit includes a transformer having first and second inductively coupled windings, the first winding having first and second end taps and a center tap coupled to the neutral bus. A switching circuit is operative to selectively couple the first end tap of the first winding to the first and second voltage busses. A rectifying circuit couples the second end tap of the first winding to the first and second voltage busses. A bidirectional DC-AC converter circuit is coupled between the second winding and the DC source port. Related operating methods are also discussed.