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Date Posted: 10:47:01 03/07/03 Fri
Author: Ravi Kumar
Author Host/IP: NoHost / 202.68.150.4
Subject: SILCON APC LINE INTERACTIVE NOT TRUE ON LINE UPS

APC SILCON REAL LINE INTERACTIVE UPS

iT CAN NOT DELIVER ADVANTAGES LIKE REAL ON LINE UPS THATS DOUBLE CONVERSION ONLINE UPS

APC SILCON DP/SL UPS Disadvantages as fallows
1. Substandard Protection
2. Common Neutral from Input to Output
3. Neutral Connects to Battery High risk for Costly Battery
4. Decrease Battery life with Input Neutral Leakages
5. No Protection for Neutral in Design
6. High Battery Voltage is Very Dangerous more than 850+VDC
7. High Voltage Servicing problem 850+VDC
8. Huge Battery Quantities (128 Batteries 64 Internal +64 External)
9. DAMAGE the battery life for IMPROPER CHARGING
10. Lower Battery Life than on line UPS Typically 18 Months
11. Unreliable
12. No Isolation Transformer in Basic Design
13. Can not control Neutral drop or Natural Related Problems
14. No Maintenance Bypass in Basic Design
15. No frequency control.
16. Input Chokes Results in High Voltage Distortion at the Output (typically 8%)
17. In Case of Input Frequency Beyond Limit, This Causes Frequent Discharge of Battery Causing Diminishing Life of Battery.
18. Criss – Cross facility for 100% Redundancy is Not Possible. This Leads to Poor Availability
19. Inverter Is not Fully Rated so It Cant Stand on High Backups
20. Poor Efficiency (90% to 96% is on Ideal Condition & for motor load) With Necessary Accessory it drop to 86%

: MAKE SURE BEFORE SELECTING UPS

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