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) > KW2G Eco-POWER METER > Rating/ Performance
Discontinuation plan
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Item | Unit | Data display range | |
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Integrated electric power (Active)*1 | kWh/MWh | 0.00 to 9999.99 kWh to 9999.99 MWh, 0.00 to 9999999.99 kWh (when 9-digit display) | |
Instantaneous electric power |
Active*2 | kW | −9999.99 to 0.000 to 9999.99 |
Reactive*2 | kvar | −9999.99 to 0.00 to 9999.99 | |
Apparent | kVA | 0.00 to 9999.99 | |
Current | R-current | A | 0.000 to 6000.00 |
N/S-current | A | 0.000 to 6000.00 (calculated value) | |
T-current | A | 0.000 to 6000.00 | |
Voltage | R (RS)-voltage | V | 0.0 to 9999.9 |
S (RT)-voltage | V | 0.0 to 9999.9 (calculated value) | |
T (TS)-voltage | V | 0.0 to 9999.9 | |
Electricity charge*3 | 0.00 to 999999 | ||
Conversion carbon dioxide value |
kg-CO2 | 0.00 to 999999 | |
Power factor*2 | Displayed on the main unit |
−1.00 to 1.00 (without identify leading phase and lagging phase) | |
Frequency | Hz | 47.5 to 63.0 | |
Pulse counter*4 | 0 to 999999 |
*1 | KW2G / KW2G-H can measure regeneration electric power. Integrated electrical power is not integrated (not subtracted) when detecting regeneration electric power. |
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*2 | While detecting regeneration electric power, minus is displayed on instantaneous active electric power and power factor. |
*3 | Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor can it be legally used for billing. |
*4 | Displayed digit of pulse counter differs according to the pre-scale set by pre-scale setting mode. |
Item | Data display range |
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Pulse counter value* | 0 to 999999 |
* The number of displayed digit of pulse count value differs according to the pre-scale set by pre-scale setting mode.
Item | Data display range |
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Converted digital value* | −999999 to 9999999 |
* The number of displayed digits of the converted digital values differs according to the preset decimal point position.
Item | Unit | Data display range |
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OFF-time*1 | h(Hour) | 0.0 to 99999.9 |
ON-time1*1 | ||
ON-time2*1 | ||
Maintenance-time*2 | ||
Actual-hours | ||
Rate of ON-time1*1 | % | 0.0 to 100.0 |
Rate of ON-time2*1 |
*1 | Excluding AKW2152G |
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*2 | Maintenance time by using pulse input cannot be measured with AKW2110GB or AKW2160GB |
*3 | Hour meter function can be used only with main unit and one expansion unit. |
Item | Specifications | |
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Accuracy (without error in CT and VT) |
Instantaneous electric power, Integrated electric power, Electricity charge and Conversion value |
Within ± (2.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉, rated input, rated frequency, power factor 1) *Accuracy coverage: 10 to 100 % of rated current |
Current | Within ± (1.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉, rated input, rated frequency, power factor 1) *Accuracy coverage: 10 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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Temperature characteristics | Within ± (1.0 % F.S. + 1 digit) (Range of -10 to +50 ℃ +14 to +122℉, rated input, power factor 1) |
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Hour meter | ±(0.01% +1 digit) Monthly accuracy: ±280 sec. (at +20℃ +68℉) | |
Frequency characteristics | Within ± (1.0 % F.S. + 1 digit) (Frequency change ± 5 % based on rated frequency, rated input, power factor 1) |
Item | Specifications |
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Rated operating voltage | 100 to 240 V AC (Add to main unit) |
Rated frequency | 50 / 60 Hz common |
Rated power consumption | Main unit: 6 VA, Expansion unit (Power measurement, Power measurement and Pulse output, and Analog input): 0.5 VA / unit, Expansion unit (Pulse input): 1.0 VA /unit (240 V AC at +25 ℃ +77 ℉) |
Allowable operating voltage range | 85 to 264 V AC (85 % to 110 % of rated operating voltage) |
Allowable momentary power-off time | 10 ms |
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 |
Display method | LCD with backlight (green), Upper: 5-digit (7-segment 1-digit + 16-segment 4-digit), Lower: 6-digit (7-segment) |
Number of connectable expansion units | Max. 7 units |
Power failure memory method | EEPROM (more than 1,000,000 overwrite), Memory items: setting value and integral measuring value |
Weight | Main unit (Standard type): 180 g approx. Main unit (SD card type): 185 g approx. Expansion unit (Power measurement): 80 g approx. Expansion unit (Power measurement and Pulse output, Pulse input and Analog input): 85 g approx. |
Item | Specifications | |
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RS-485 communication | USB communication*5 | |
Protocol | MEWTOCOL / Modbus RTU (selectable with setting mode) | - |
Transmission function | - | Computer link (MEWTOCOL) |
Isolation status | Isolated with the internal circuit | Isolated with the internal circuit |
Number of connected units | 99 units Max.*1*2 | - |
Transmission distance | 1200 m 3.937 ft Max.*3 | - |
Transmission speed | 2,400 / 4,800 / 9,600 / 19,200 / 38,400 / 57,600 / 115,200 bps (selectable with setting mode) |
12 Mbps (Full-speed) |
Transmission format | Data length: 8-bit / 7-bit (selectable with setting mode)*4 Parity: Not available / Odd number / Even number (selectable with setting mode) Stop bit: 1-bit / 2-bit (selectable with setting mode) |
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Communication method | Half-duplex | - |
Synchronous system | Synchronous communication method | - |
Ending resistance | 120 Ω approx. (built-in) | - |
*1 | For RS-485 converter on the computer side, we recommend SI-35 and SI-35USB (from LINE EYE Co.,Ltd.). |
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*2 | When using SI-35, SI-35USB or PLC from our company (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. |
*3 | Please check with the actual devices when some commercial devices with RS-485 interface are connected. The number of connected devices, transmission distance, and transmission speed may be different according to using transmission line. |
*4 | With Modbus RTU protocol, it works only with 8-bit. |
*5 | When using the USB port, install the dedicated USB driver. |
Item | Specifications | |
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Input mode | Addition (Fixed) | |
Max. counting speed | 50 kHz / 30 Hz (Select with setting mode) | |
Pulse input (Min. input signal width) |
0.01 ms (When 50 kHz selected) / 16.7 ms (When 30 Hz selected), ON : OFF ratio = 1 : 1 |
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Input signal | Contact / No contact (open collector) • Impedance when shorted: Max. 1 kΩ • Residual voltage when shorted: Max. 2 V • Impedance when open: Min. 100 kΩ |
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Output mode | HOLD (Over count) | |
Prescale | Decimal point |
Setting possible up to under 3-digit |
Range | 0.001 to 100.000 (Set with setting mode) |
Item | Specifications | |
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Number of input points | 2 channels | |
Input range (Select with setting mode) | Voltage | 0 to 5 V / 1 to 5 V |
Current | 0 to 20 mA / 4 to 20 mA | |
Converted digital value | 0 to 4000 (decimal number)* | |
Resolution | 1/4000 (12 bits) | |
Overall precision | ±1 % F.S. or less (-10 to 55 ℃ +14 to 131 ℉ ) | |
Input impedance | Voltage | 440 kΩ |
Current | 125 Ω | |
Absolute maximum input | Voltage | - 0.3 to +10 V |
Current | - 2 to + 30 mA | |
Input protection | Diode |
* | Digital conversion value differs according to the scaling conversion value set by setting
mode. If the analog input value exceeds the upper or lower limit, the digital value will preserve the upper or lower limit. |
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Item | Specifications |
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Number of output point | 1 point |
Insulation method | Photo coupler |
Output type / Output capacity |
Open collector / 100 mA 30 V DC |
Pulse width (when pulse output with integrated active electric power selected) |
1 to 100 ms (selectable with setting mode) |
ON state voltage drop | 1.5 V or less |
OFF state leakage current | 100 μA or less |
Pulse output unit*1 | 0.001 kWh, 0.01 kWh, 0.1 kWh, 1 kWh, 10 kWh, 100 kWh / Power alarm(AL-P) / Current alarm(AL-C) / Stand-by power alarm(AL-S) / Counter(Cnt) / General purpose output(OUT) / Error alarm(Error) (selectable with setting mode) |
General purpose output | Level output / Repeat cycle output / One-shot output (selectable with setting mode) |
Output ON-time, Output OFF-time |
0.1 to 10.0 sec. (selectable with setting mode) |
*1 | General-purpose output (OUT) and Error alarm (Error) are possible using main unit software AKW2010GB Ver. 1.05 or later and AKW2020GB Ver. 1.02 or later and expansion unit software AKW2160GB Ver.1.01 or later. |
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*2 | For normal operation of other functions, to switch on minimal pulse width of 1 to 10 ms,
the maximum pulse output interval is 25 ms. Consequently, a minimum measurable pulse unit output setting of 40 pulses or less per 1 second is recommended. |
[How to calculate]
Unit for pulse output: PL-P > Max. measurement power (kW) / 3,600 sec × 40 pulse/sec
When the pulse output unit is 0.001, the maximum power that can be properly measured by pulse output is 144 kW (3,600 sec × 40 pulse/sec × 0.001).
Note:
(1) Count errors may occur if the pulse output is set to 40 pulses or more per 1 second. |
(2) If the pulse output OFF time is set too short, count errors by connected counters, PLCs (Programmable Logic Controllers) may occur. |
*3 | These count output specifications are only for the main unit. |
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Item | Clamp-on typ | ||||
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AKW4801B AKW4801C |
AKW4802B AKW4802C |
AKW4803B AKW4803C |
AKW4804B AKW4804C |
AKW4808B AKW4808C |
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CE marking directive compliance | Low Voltage Directive, RoHS Directive | ||||
Primary side rated current | 5A/50A | 100A | 250A | 400A | 600A |
Secondary side rated current | 1.67mA/16.7mA | 33.3mA | 125mA | 200mA | 200mA |
Winding (Turn) | 3000 | 3000 | 2000 | 2000 | 3000 |
Ratio error | ±2.0%F.S. | ||||
Through hole | ø10 ø0.39 | ø16 ø0.63 | ø24 ø0.94 | ø36 ø1.42 | ø36 ø1.42 |
Breakdown voltage (initial) | 1000V AC/1min (Between through hole and output lead wire) |
2000V AC/1min (Between through hole and output lead wire) |
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Insulation resistance (initial) | Min. 100 M Ω (at 500 V DC) (Between through hole and output lead wire) | ||||
Functional vibration resistance | 10 to 55 Hz (1 cycle / min), single amplitude: 0.15 mm 0.01 in (10 min on 3 axes) | ||||
Vibration resistance | 10 to 55 Hz (1 cycle / min), single amplitude: 0.375 mm 0.01 in (1 hour on 3 axes) | ||||
Functional shock resistance | Min. 98m/s2(4 times on 3 axes) | ||||
Shock resistance | Min. 294m/s2(5 times on 3 axes) | ||||
Output protection level | ±7.5 V with clamp element | ±3.0V with clamp element | |||
Permissible clamping frequency | 100 times approx. | ||||
Ambient temperature range | -10 to +50℃ +14 to +122 ℉ (without frost and non-condensing) | ||||
Storage temperature | -20 to +60℃ -4 to +140 ℉ (without frost and non-condensing) | ||||
Ambient humidity | 35 to 85%RH(at +20℃ +68 ℉ non-condensing) | ||||
Dimensions (mm in) (W x H x D) |
23 x 40 x 26.5 0.08 x 0.13 x 0.09 |
30 x46.5 x 32 0.10 x 0.15 x 0.11 |
45 x65 x 34 0.15 x 0.21 x 0.11 |
57 x81 x 38 0.19 x 0.27 x 0.12 |
62.6 x93.3 x 40 0.21 x 0.31 x 0.13 |
Weight (Relay cable included) |
60 g approx. | 90 g approx. | 200 g approx. | 295 g approx. | 450 g approx. |
Item | Through type | |||
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AKW4506B AKW4506C |
AKW4507B AKW4507C |
AKW4508B AKW4508C |
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CE marking directive compliance | Low Voltage Directive, RoHS Directive | |||
Primary side rated current | 50A/100A | 250A/400A | 600A | |
Secondary side rated current | 16.7mA/33.3mA | 125mA/200mA | 200mA | |
Winding (Turn) | 3000 | 2000 | 3000 | |
Ratio error | ±1.0%F.S. | |||
Through hole | ø17mm ø0.67 in | ø36mm ø1.42 in | ||
Breakdown voltage (initial) | 1000V AC/1min (Between through hole and output lead wire)) |
2000V AC/1min (Between through hole and output lead wire) |
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Insulation resistance (initial) | Min. 100 MΩ (at 500 V DC megger) (Between through hole and output lead wire) | |||
Functional vibration resistance | 10 to 55 Hz (1 cycle / min), single amplitude: 0.15 mm 0.01 in (10 min on 3 axes) | |||
Vibration resistance | 10 to 55 Hz (1 cycle / min), single amplitude: 0.375 mm 0.01 in (1 hour on 3 axes) | |||
Functional shock resistance | Min. 98 m/s2 (4 times on 3 axes) | |||
Shock resistance | Min. 294 m/s2 (5 times on 3 axes) | |||
Output protection level | ±7.5 V with clamp element | ±3.0 V with clamp element | ||
Permissible clamping frequency | - | |||
Ambient temperature range | –10 to +50 ℃ +14 to +122 ℉ (without frost and non-condensing) | |||
Storage temperature | –20 to +60 ℃ –4 to +140 ℉ (without frost and non-condensing) | |||
Ambient humidity | 35 to 80 % RH (at +20 ℃ +68 ℉non-condensing) | |||
Dimensions (mm in) (W x H x D) |
ø42 x 15 1.65 x 0.05 |
ø70 x19 2.76 x 0.06 |
ø70 x19 2.76 x 0.06 |
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Weight (Relay cable included) |
70 g approx. | 200 g approx. | 215 g approx. |
Notes :
1) | Dedicated CT are dedicated for low voltage under 440 V AC system. They can not be used for high voltage circuit. |
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2) | In each type of Eco-POWER METER excluding AKW8115, KW9M and KW2M, a combination of commercially secondary side 5 A CTs and dedicated CTs for 5 A is used for measuring high voltage circuits; For details, confirm with each respective user's manual. |
3) | Since dedicated CTs cannot be used when measuring with AKW8115, KW9M and KW2M, please be careful and do not purchase a dedicated CT by mistake. |
4) | For the AKW8115, KW9M and KW2M, CT with a secondary side current 1 A or 5 A is recommended. Please confirm the specification beforehand. |
5) | Dedicated CT are not included with Eco-POWER METERs. |
6) | Each dedicated CT includes a 1 m 3.281 ft relay cable, respectively. |
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