Energy Measurements
General Description
The energy measurements are refreshed every second. Energy measurements are saved every hour in the non-volatile memory of the MicroLogic trip unit.
Energy measurements include:
-
active energy Ep
-
reactive energy Eq
-
apparent energy Es
-
active energy counted positively (EpIn) or negatively (EpOut), according to the configuration of register 3316 Power Flow Sign.
-
reactive energy counted positively (EqIn) or negatively (EqOut), according to the configuration of register 3316 Power Flow Sign.
-
active energy and reactive energy are accumulated according to the configuration of register 3324 (absolute mode by factory setting) Energy Accumulation Mode.
The reset minimum/maximum command (command code = 46728) can reset the content of the energy measurement registers, cumulative energy measurements excepted.
Energy Registers
Energies are stored in big-endian format: the most significant word is transmitted first and the least significant second.
Examples
If Ep = 7589 kWh, then:
-
register 2000 = 0 (0x0000)
-
register 2001 = 7589 (0x1DA5)
If Ep = 4,589,625 kWh, then:
-
register 2000 = 70 (0x0046)
-
register 2001 = 2105 (0x0839)
4589625 = 70x65536 + 2105
|
Address |
Register |
RW |
X |
Unit |
Type |
Range |
A/E |
Description |
|---|---|---|---|---|---|---|---|---|
|
0x07CF– 0x07D0 |
2000– 2001 |
R |
1 |
kWh |
INT32 |
-1 999 999 999–+1 999 999 999 |
E |
Active energy: Ep |
|
0x07D3– 0x07D4– |
2004– 2005 |
R |
1 |
kVARh |
INT32 |
-1 999 999 999–+1 999 999 999 |
E |
Reactive energy: Eq |
|
0x07D7– 0x07D8 |
2008– 2009 |
R |
1 |
kWh |
INT32 |
0–1 999 999 999 |
E |
Active energy counted positively: EpIn |
|
0x07DB– 0x07DC |
2012– 2013 |
R |
1 |
kWh |
INT32 |
0–1 999 999 999 |
E |
Active energy counted negatively: EpOut |
|
0x07DF– 0x07E0 |
2016– 2017 |
R |
1 |
kVARh |
INT32 |
0–1 999 999 999 |
E |
Reactive energy counted positively: EqIn |
|
0x07E3– 0x07E4 |
2020– 2021 |
R |
1 |
kVARh |
INT32 |
0–1 999 999 999 |
E |
Reactive energy counted negatively: EqOut |
|
0x07E7– 0x07E8 |
2024– 2025 |
R |
1 |
kVAh |
INT32 |
0–1 999 999 999 |
E |
Apparent energy: Es |
|
0x07EB– 0x07EC |
2028– 2029 |
R |
1 |
kWh |
INT32 |
0–1 999 999 999 |
E |
Cumulative active energy counted positively (cannot be reset): EpIn |
|
0x07ED– 0x07EE |
2030– 2031 |
R |
1 |
kWh |
INT32 |
0–1 999 999 999 |
E |
Cumulative active energy counted negatively (cannot be reset): EpOut |