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BUENO ELECTRIC
BUENO ELECTRIC
BUENO ELECTRIC
BUENO ELECTRIC
Contact: [email protected]
Fax: +86-25-51816989
9
large amount of bus import can be avoided, and protection reliability is improved. Moreover, almost, it would not
increase the product cost, and would enhance cost-effectiveness.
The display window of this module adopts four lines, with LCD of 12 English characters in each line. The
man-machine interface is clear and easy to understand, configured with universal keyboard operation mode of PS
series protection, making the man-machine interaction more convenient and simple. Meanwhile, considering the
characteristics of low voltage protection operation, plenty light indication information is configured in this module,
making operation information more visual.
4 Main Functions
Due to the great improvement of computation capability after using 32-bit microprocessor, all the
components can be computed in real-time, which would greatly improve the overall reliability of protection.
4.1 Startup time
Mode of measuring motor startup time: the timing would begin when motor maximum phase current changes
suddenly from zero to 10%I
e,
until startup current passing peak value and descending to 120%I
e
（
I
e
is motor rated
current, same below
）
.
The time period between the two points is called motor startup time. Meanwhile, motor startup time setting
T
start0
should be entered in settings, and it represents the time that is taken form the motor startup to its rotation
speed reaching rated rotation speed, which could be set to be 1.2 times of motor longest startup time.
For measured motor startup time T
start
and startup setting T
start0
, the device would treat the shorter one as real
motor startup process time. Therefore, for each motor startup, the device would experience different startup
process time.
For BEPR- 822U Digital Asynchronous Motor Protections, the last soft jumper light on device panel is defined as
motor startup time indicating light, which would be lit during motor startup period, and visually show the startup
process.
