60
50Hz or 60Hz for option.
Besides, PMAC770 records the over-limit event for frequency deviation. Users can
set a limit value for the frequency deviation.
When the real-time frequency deviation is out of limit, PMAC770 will record the event
with time stamp, its duration time and the Peak value. PMAC770 can store 30 events
log for frequency deviation.
10.12
10.12
10.12
10.12 Voltage
Voltage
Voltage
Voltage Deviation
Deviation
Deviation
Deviation
PMAC770 calculates 3-phase voltage deviation which is the percentage of deviation
compared with its nominal value.
Formula:
Voltage Deviation (%) = (Actual voltage – Nominal voltage)/ Nominal voltage×100%
In above formula, the
Nominal voltage
is rated voltage. The voltage deviation has a
negative or positive sign.
Besides, PMAC770 records the over-limit event for voltage deviation. Users can set a
limit value for the voltage deviation.
When the real-time voltage deviation is out of limit, PMAC770 will record the event
with time stamp, its duration time and the Peak value. PMAC770 can store 30 events
log for voltage deviation.
10.13
10.13
10.13
10.13 Voltage
Voltage
Voltage
Voltage Unbalance
Unbalance
Unbalance
Unbalance Rate
Rate
Rate
Rate
PMAC770 calculates 3 phase voltage unbalance rate. Data resolution: 1%.
Formula:
HRW Limited
Ph +852 2546 7402 - Fax +852 2546 7403 - [email protected] - www.hrw.hk