Business > Industrial Devices > Automation Controls Top > FA Sensors & Components > Energy Management Solutions > Eco Series (Simple Watt-Hour Meter/ Simple Power-On Counter/ Power-On Hour Meter) > KW8M Eco-POWER METER(Discontinued Products) > Rating/ Performance
We are sorry, the products have been discontinued. Please refer to the details of the discontinued products and the recommended substitutes list below.
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Item | Unit | Data Display range | |
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Integrated electric power |
Active | kWh | 0.00 to 9999999.9 |
Reactive | kvarh | 0.00 to 9999999.9 | |
Apparent | kVAh | 0.00 to 9999999.9 | |
Instantaneous electric power |
Active | kW | 0.00 to 9999999.99 |
Reactive | kvar | -99999.99 to 0.00 to 999999.99 | |
Apparent | kVA | 0.00 to 9999999.99 | |
Current | CT1 - phase current |
A | 0.0 to 6000 |
CT2 - phase current |
A | 0.0 to 6000 | |
CT3 - phase current |
A | 0.0 to 6000 | |
Voltage | Voltage between P1 and P0 |
V | 0.0 to 9999 |
Voltage between P2 and P0 |
V | 0.0 to 9999 | |
Voltage between P3 and P0 |
V | 0.0 to 9999 | |
Electricity charge *1 | - | 0.0 to 99999999 | |
Power factor | Displayed on the main unit |
0.00 to 1.00 (LEAD: Leading phase, LAG: lagging phase) |
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Communication | -1.00 to 0.00 to 1.00 (Within the range of phase angle θ=-90 to 0 to 90 degree) |
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Frequency | Hz | 47.5 to 63.0 | |
Hour meter | ON-time | hour | 0.0 to 99999.9 |
OFF-time | |||
Pulse counter | - | 0.0 to 99999999 | |
Simple demand *2 | Present demand | kW | 0.00~999999.99 |
Estimated demand | kW | 0.00~999999.99 | |
Ratio of estimated demand | % | 0.0~9999.9 |
*1 | Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor can it be legally used for billing. |
*2 | Simple demand is the function only for AKW8111H. It doesn’t support pulse input.It supports only CT input (power measurement). Please use this simple demand function as your standard. The time used in this function is the time set by Eco-POWER METER. Therefore it is different from the demand meter controlled by your power company. |
Item | Specifications | |
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Rated operating voltage | 100 to 240V AC | |
Rated frequency | 50/60Hz common | |
Rated power consumption | 8VA(240 V AC at +25℃ +77℉) | |
Inrush current | 30 A or less (200 VAC at +25℃) | |
Allowable operating voltage range | 85 to 264 V AC (85 % to 110 % of rated operating voltage) | |
Allowable momentary power-off time | 10ms | |
Ambient temperature | -10 to +50 ℃ +14 to +122 ℉ (-25 to +70 ℃ -13 to +158 ℉ at storage) | |
Ambient humidity | 30 to 85 % RH (at +20 ℃ +68 ℉ non-condensing) | |
Breakdown voltage (initial) | Between the isolated circuits: 2000V for 1min (measured with 500 V DC) |
• Outer edge (case) ⇔ All terminals • Between insulated circuits • Operating power supply terminals ⇔ Analog input terminals (Note) • Operating power supply terminals ⇔ Pulse input terminal (Note) • RS485 communication terminals ⇔ All other terminals • Pulse output terminals ⇔ All other terminals |
Insulation resistance (initial) | Between the isolated circuits:100MΩ or more (measured at 500V DC) |
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Vibration resistance | 10 to 55Hz (1cycle/min) single amplitude: 0.375mm 0.01 in(1hour on 3 axes) | |
Shock resistance | Min. 294m/s2 (5 times on 3 axes) | |
Display method | 8-digit, 7-segment LED | |
Power failure memory method | EEP-ROM (more than 100,000 overwrite) | |
Size | 48 × 96 × 98.5 mm | |
Weight*2 | AKW8111: approx.235g AKW8111H: approx.250g AKW8115: approx.265g |
Note : Analog input terminals: No.11 to 20 / Pulse input terminal: No.4 and 5
Item | Specifications | ||
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Measured input voltage |
Rating | Single-phase two-wire: 0 to 440V AC (Line voltage) Single-phase three-wire: 0 to 220V AC (Phase voltage) Three-phase three-wire: 0 to 440V AC (Line voltage) Three-phase four-wire: 0 to 254V AC (Phase voltage) |
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Allowance | 85% to 120% of rated input voltage | ||
Allowable measurement voltage |
Single-phase two-wire: 0 to 528V AC (Line voltage) Single-phase three-wire: 0 to 264V AC (Phase voltage) Three-phase three-wire: 0 to 528V AC (Line voltage) Three-phase four-wire: 0 to 300V AC (Phase voltage) |
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VT ratio | 1.00 to 99.99 (Set with setting mode) *Voltage transformer (VT) is required when you measure a load with voltage over 440V system. (Secondary side: 110V) |
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Measured input current |
Primary side rating | • 5A/50A/100A/250A/400A/600A (In case using dedicated CT.) (Select with setting mode) • 1 to 4000A (Set with setting mode) *Use a CT with secondary side current of 5A when measure 600A or more. |
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Special functions |
Cut-off current | 1.0 to 50.0%F.S. (Select with setting mode) | |
Current threshold for hour meter |
1.0 to 100.0%F.S. (Select with setting mode) | ||
Accuracy (without error in CT and VT) |
Instantaneous electric power(Active/Reactive/Apparent), Integrated electric power(Active/Reactive/Apparent), Electricity charge |
AKW8111 AKW8111H |
Within ± (2.0 % F.S. + 1 digit) In case of 5 A CT mode, within ± (2.5 % F.S. + 1 digit) (at +20 ℃ +68 ℉, rated input, rated frequency, power factor 1) *Accuracy coverage: 5 to 100 % of rated current |
Instantaneous electric power (Active/Apparent), Integrated electric power (Active/Apparent), Electricity charge |
AKW8115 | Within ± (1.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉ rated input, rated frequency, power factor 1) *Accuracy coverage: 5 to 100 % of rated curre |
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Instantaneous electric power (Reactive), Integrated electric power (Reactive) |
AKW8115 | Within ± (2.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉, rated input, rated frequency, power factor 1) |
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Current | Within ± (1.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉ rated input, rated frequency, power factor 1) *Accuracy coverage: 5 to 100 % of rated current |
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Voltage | Within ± (1.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉ rated input, rated frequency, power factor 1) |
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Hour meter | Within ± (0.01 % +1 digit) (at +20 ℃ +68 ℉) (In case power on start or current energizing: ± 0.01 % + 1 sec + 1 digit) |
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Temperature characteristics |
Within ± (1.0 % F.S. / +10 ℃ +50 ℉ + 1 digit) In case of 5 A CT mode, within ± (1.5 % F.S. + 1 digit)(AKW8111, AKW8111H only) (Range of -10 to +50 ℃ +14 to +122 ℉, rated input, power factor 1) |
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Frequency characteristics |
Within ± (1.0 % F.S. + 1 digit) In case of 5 A CT mode, within ± (1.5 % F.S. + 1 digit)(AKW8111, AKW8111H only) (Frequency change ± 5 % based on rated frequency, rated input, power factor 1) |
Item | Specifications |
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Input mode | Addition (Fixed) |
Max. counting speed | 2kHz/30Hz (Select with setting mode) |
Pulse input | Min. input signal width: 0.25ms (When 2kHz selected)/ 16.7ms (When 30Hz selected) ON:OFF ratio = 1 : 1 |
Input signal | Contact/No contact (open collector) |
Output mode | HOLD (Over count) |
Number of digit | 8-digit (0 to 99999999) |
Item | Specifications |
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Number of output point | 1 point |
Insulation method | Optical coupler |
Output type | Open collector |
Output capacity | 100mA 30V DC |
Pulse width | Approx. 100ms |
ON state voltage drop | 1.5V or less |
OFF state leakage current | 100μA or less |
Pulse output unit | 0.001/0.01/0.1/1/10/100kWh/Alarm(AL-P)/ Current alarm(AL-C) /Stand-by alarm (AL-S) /Counter(Cnt)/ Demand alarm(DEM) (Selectable with setting mode) |
* We recommend the setting of minimum unit for pulse output for measurement shown as below.
Output pulse: 4 pulse or less per 1sec.
[How to calculate]
(Unit for pulse output:PL-P)>(Max. measurement power [kW] / (3600[s]×4 [pulse/s])
Caution
(1) Improper unit setting may cause miss counting.
(2) If the OFF time is too short, there is a possibility of counting errors.
Item | Specifications | |
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Interface | Conforming to RS485 | |
Protocol | MEWTOCOL/MODBUS(RTU)(selectable with setting mode) | |
Isolation status | Isolated with the internal circuit | |
Number of connected units | 99 (max.)*2 *3 | |
Transmission distance | 1200m (max.)*1 | |
Transmission speed | 38400/19200/9600/4800/2400bps (selectable with setting mode) | |
Transmission Format | Data length | 8bit/7bit (selectable with setting mode)*4 |
Parity | Not available / Odd number / Even number (selectable with setting mode) | |
Stop bit | 1bit (fixed) | |
Communication method | Half-duplex | |
Synchronous system | Synchronous communication method |
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Ending resistance | Approx. 120Ω (built-in) | |
Transmission line | Twisted-pair cable with shield or VCTF | |
Communication mode | 1 : N communication |
*1 | Please check with the actual devices when some commercial devices with RS485 interface are connected. The number of connected devices, transmission distance, transmission speed may be different according to using transmission line. |
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*2 | For RS485 converter on the computer side, we recommend SI-35 and SI-35USB (from LINE EYE Co., Ltd.). |
*3 | When using SI-35,SI-35USB or PLC from Panasonic Industrial Devices SUNX (which can be connected up to 99 units), up to 99 Eco-POWER METER can be connected. In case using this system with the other devices, up to 31 Eco-POWER METER can be connected. |
*4 | With MODBUS(RTU) protocol, it works only with 8bit. |
Item | Specifications | ||
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Log function Memory of main unit |
Automatic logging |
Save cycle | 60 min. |
Save data | Integrated active power, Integrated reactive power, Integrated apparent power | ||
Save data amount | Max. 2232 records *3 months | ||
Display | Integrated electric power by month, Integrated electric power by day, Integrated electric power by hour | ||
Selected logging*1 |
Save cycle | 1, 5, 10, 15, 30, 60 min. | |
Save data | Integrated active power, Integrated reactive power, Integrated apparent power, Instantaneous voltage, |
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Save data amount | Max. 2160 records *1.5 days (when save frequency is 1 min.) | ||
Calendar timer function | Time accuracy monthly accuracy: 240 sec. (at –10℃) monthly accuracy: 70 sec. (at 25℃) monthly accuracy: 240 sec. (at 50℃) |
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Arbitrary integrated active power | Integrated active power in arbitrary time Display range: 0.00 to 9999999.9 kWh |
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Content of battery backup | Time measurement and log data retained | ||
Battery life*2 *3 | About 5 years (at ambient temperature 25℃) |
*1 | Another software is required to check selectable log data saved in the built-in memory. The recommended software, KW Monitor, is available for download from here. |
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*2 | When battery power is reduced, “E” is blinking. Please change the battery according to the battery replacement procedure. |
*3 | Battery life will shorten if this product is used in high temperature environments. |
Demand span | 30 minutes span fix | |
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Span system | synchronized with the main unit clock | |
Data update cycle | 1 minute | |
Measurement item | Present demand (update every 1 second), Estimated demand (update every 1 minute) Remaining time (update every 1 minute) |
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Display | Present demand, Estimated demand, Demand setting value Remaining time Ratio of estimated demand Demand log, Monthly max. demand log |
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Saved date (main unit memory) | Demand log 336 records (7 days) Monthly max. demand log 13 records (13 months) |
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Demand alarm * | Indication | [d] blinking at the bottom line |
Output | Pulse output | |
Power Failure Memory | Monthly max. demand log, Demand log, Present demand |
*Demand alarm
When the present demand or estimated demand exceeds the setting value, it notifies by the output
and the indication. You need to set “DEM” with unit for pulse output setting in order to output.
Please use this simple demand function as your standard.
It doesn’t support pulse input. It supports only CT input (power measurement).
The time used by this function is the time set up with Eco-POWER METER.
Therefore, it is different from the demand meter controlled by an electric power company.
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