Appendix 1 Technical And Engineering Data 27
NetSure 731 A41 Subrack Power System User Manual
Parameter category
Parameter
Description
alarm point
DC output alarm and
protection
DC output under-voltage
recovery point
Default: -45.5 ± 0.2Vdc, 0.5Vdc higher than the under-voltage alarm point
DC output over-voltage
protection point
Default: -59.0 ± 0.2Vdc, configurable through controller
LLVD
Default: -44.0 ± 0.2Vdc, configurable through controller
（
If it is used for outdoor
，
the default is-
－
46.6±0.2Vdc
）
BLVD
Default: -43.2 ± 0.2Vdc, configurable through controller
Rectifier
Current sharing
The rectifiers can work in parallel and share the current. The unbalanceness is
better than ± 5%.
Derate by input (at
45°C)
176Vac input, The rectifier output is 100% power
154Vac~176Vac input
，
the rectifier output power increased from 2900W to
3000W.
85Vac~154Vacinput
，
the rectifier output power increased from 1500W to 2900W.
Below 80Vac
，
the rectifier low pressure power off.
Walk-in
The output voltage can rise slowly when the rectifier start up. The walk in time is
configurable through the controller.
Fan speed adjustable
Rectifier fan speed can be set to auto or full speed.
Over-voltage protection
The rectifier provides over-voltage hardware and software protection. The
hardware protection point is 59.5V ± 0.5V, and it requires manual resetting to
restore operation. The software protection point is between 56V and 59V (0.5V
above output voltage, 59V by default), and can be set through the controller
There are two software protection modes, which can be selected through the
software at the host:
1. Lock out at the first over-voltage
Once the output voltage reaches protection point, the rectifier will shut off and
hold that state. It requires manual resetting to restore the operation
2. Lock out at the second over-voltage
When the output voltage reaches the software protection point, the rectifier will
shutdown, and restart automatically after 5 seconds. If the over-voltage happens
again within a set time (default: 5min. Configurable through controller), the
rectifier will shut off and hold that state. It requires manual resetting to restore
the operation
Manual resetting: Resetting can be done manually through the controller, or by
removing the rectifier from system
Temperature power
limiting
The rectifiercan start in -40
℃
;
Below 45
℃
, the rectifier with full power (3000 W) output.
From 45
℃
~55
℃
, the rectifier with linearly derating to 2900W.
From 55
℃
~65
℃
, the rectifier with linearly derating to 2250W.
From 65
℃
~70
℃
, the rectifier with linearly derating to 0W.
EMC
Conducted emission
Class A EN55022
Radiated emission
Harmonic current
emission
Class A EN61000-3-12
Voltage fluctuation and
flash
EN61000-3-11
EFT
Level 4 EN/IEC 61000-4-4
ESD
Level 3 EN/IEC 61000-4-2
Surges
Level 4 EN/IEC 61000-4-5
Radiation
Level 3 EN/IEC 61000-4-3
Conduction
Level 2 EN/IEC61000-4-6
Lightning protection
features
At AC side
The AC input side can withstand five times of simulated lightning voltage of 5Kv
at 10/700µs, for the positive and negative polarities respectively. It can withstand
five times of simulated lightning surge current of 20Ka at 8/20µs, for the positive
and negative polarities respectively. The test interval is not smaller than 1
minute. It can also withstand one event of simulated lightning surge current of
40kA at 8/20µs.