Puls UC10.242 DIN-Rail UPS Guia De Especificação

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UC10.241, UC10.242
 
 
UC-Series 
24V,
 
15A,
 
C
APACITOR
-
BASED 
B
UFFER 
M
ODULES
 
 
 
11.  L
IFETIME 
E
XPECTANCY AND 
MTBF 
 
The lifetime expectancy of the EDLC buffer module is predominantly affected by the storage capacitors. The biggest 
influence in lifetime is a combination of operating voltage and operating temperature of these capacitors. To gain 
longest lifetimes, PULS does not utilize the full allowed working voltage for these capacitors and therefore accepts a 
slightly shorter buffer time. 
The EDLC’s do not experience a true end-of-life, rather the capacitance continually degrades over the life of the buffer 
module. The typical degradation behavior resembles that of an exponential decay in the first couple of 1000 hours 
followed by a linear degradation. The majority of the capacitance reduction occurs during the initial use of the buffer 
module and this change in performance then levels off over time. When working with the specified lifetime numbers, 
the remaining capacity must always be taken into account. The buffer time correlates linearly to the capacity. 
The ultracapacitors have an almost unlimited shelf life (unlike batteries) when stored uncharged at 25°C. 
The number of charge/ discharge cycles does not have an impact on the lifetime as long as the number of cycles does 
not exceed 100 000. This should not be the case for a typical backup operation. 
 
Lifetime UC10.241 
UC10.242 
 
Remaining capacity 
85% 75% 85% 75% 
 
Lifetime expectancy 
*)
 
186 000h 
324 000h 
186 000h 
324 000h 
at 24V, 10A, 25°C 
 
155 000h 
270 000h 
155 000h 
270 000h 
at 24V, 15A, 25°C 
 
66 000h 
115 000h 
66 000h 
115 000h 
at 24V, 10A, 40°C 
 
55 000h  
96 000h 
55 000h  
96 000h 
at 24V, 15A, 40°C 
 
23 000h 
40 000h 
23 000h 
40 000h 
at 24V, 10A, 55°C 
 
19 000h 
34 000h 
19 000h 
34 000h 
at 24V, 15A, 55°C 
 
MTBF UC10.241 
UC10.242 
 
MTBF 
**)
  SN 29500, IEC 61709 
1 519 000h 
1 515 000h 
at 24V, 10A, 25°C 
 
1 443 000h 
1 439 000h 
at 24V, 15A, 25°C 
 
899 000h 
895 000h 
at 24V, 10A, 40°C 
 
954 000h 
850 000h 
at 24V, 15A, 40°C 
MTBF 
**)
  MIL HDBK 217F 
525 000h 
524 000h 
at 24V, 10A, 25°C; Ground Benign GB25 
 
498 000h 
497 000h 
at 24V, 15A, 25°C; Ground Benign GB25 
 
385 000h 
384 000h 
at 24V, 10A, 40°C; Ground Benign GB40 
 
365 000h 
364 000h 
at 24V, 15A, 40°C; Ground Benign GB40 
 
125 000h 
125 000h 
at 24V, 10A, 25°C; Ground Fixed GF25 
 
118 000h 
118 000h 
at 24V, 15A, 25°C; Ground Fixed GF25 
 
95 000h 
95 000h 
at 24V, 10A, 40°C; Ground Fixed GF40 
 
90 000h 
90 000h 
at 24V, 10A, 40°C; Ground Fixed GF40 
*)   The Lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime 
expectancy of the built-in electrolytic capacitors and storage capacitors (ultracapacitors). Lifetime expectancy is specified in operational 
hours and is calculated according to the capacitor’s manufacturer specification. 
**)  MTBF stands for Mean Time Between Failure, which is calculated according to statistical device failures, and indicates reliability of a 
device. It is the statistical representation of the likelihood of a unit to fail and does not necessarily represent the life of a product. 
 
The MTBF figure is a statistical representation of the likelihood of a device to fail. A MTBF figure of e.g. 1 000 000h means that 
statistically one unit will fail every 100 hours if 10 000 units are installed in the field. However, it can not be determined if the failed unit 
has been running for 50 000h or only for 100h. 
 
Apr. 2014 / Rev. 2.0 DS-UC10.241-EN (REVC) 
All parameters are specified at 24V, 10A output current, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. 
www.pulspower.com   Phone +49 89 9278 0    Germany 
12/27