Introduction
Maintaining correct incoming supply voltage to telecommunication equipment within base station sites is necessary to avert malfunctions and to increase MTBF(Mean Time Between Failures) of the equipment. Wenzhou Modern presents special-purpose AC power supply for telecommunication, the cost of it compare to the purchase of telecommunication equipment and the subsequent loss of revenue due to failure, is minimal. Applications include providing stable voltage to air conditioning units used to cool the equipment and extra protection to rectifier units enabling them to operate at nominal voltage to provide improved efficiency, minimal harmonics and extending working life. According to different of designed electric system and structure, it has specified as three phase synchronous adjustment and three phase independent adjustment.

Technical Specification:
1. Input voltage range: 220/380V, ±20%—30%, 47—60HZ
2. Nominal output voltage: Three phase, 220/380V or 230/400V
3. Over voltage cut off: When output voltage over 253V(+15%),it will delay 4-7seconds before cut off. Automatic restart when mains voltage decrease
4. Under voltage cut off: When output voltage under 176V(-20%),it will delay 4-7seconds before cut off.Automatic restart when mains voltage increase
5. Safe Start: The unit waits 4-7 seconds after mains restoration before output contactor is turned on. The regulator regulates the output voltage to normal output voltage before the contactor is turned on.
6. Output voltage accuracy: Selectable&plusmn;1~5%,Factory preset at&plusmn;2.0%, Long term stability: < 2.0 %
7. Overload protection: Automatic circuit breaker at the input 150 % overload capability for heavy start load.
8. Efficiency: &ge;98%(without isolation transformer)
9. Operation environment: Temperature: -10&ordm;C&mdash;+40&ordm;C, Relative Humidity: <90%, Clean and well ventilated
10. Capacity: Single phase: 5KVA&mdash;100KVA Three phase: 10KVA&mdash;1200KVA