8
Measuring
Measuring
Measuring
Measuring Function
Function
Function
Function of
of
of
of PMAC770
PMAC770
PMAC770
PMAC770 Basic
Basic
Basic
Basic Unit
Unit
Unit
Unit
(there
(there
(there
(there are
are
are
are 3
3
3
3 class)
class)
class)
class)
Basic
class
Middle
class
High
class
Voltage, Current, Power (P, Q, S), Power factor,
Energy (kwh, kvarh in 4 quadrant),
Frequency, Demand,
Max./ min. value ( U, I, P, Q),
Multi-tariff energy, Load rate
One RS485 (Modbus-RTU), Real-time clock,
√
√
√
3 status input + 2 relay output
Over / under limit alarm
SOE event log
×
√
√
Voltage unbalance,
THD, 31
st
harmonic, Harmonic RMS(0~31
st
),
Harmonic energy (1~13
th
),
Voltage crest factor, Current K factor,
Voltage deviation, Frequency deviation
Record for voltage/ frequency deviation,
Voltage unbalance record
×
×
√
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Ph +852 2546 7402 - Fax +852 2546 7403 - [email protected] - www.hrw.hk