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) > KW4M 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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Instantaneous electrical power | kW | 0.00 to 9999.99 | |
Integrated electrical energy | kWh MWh |
0.00 to 9999.99 kWh to | |
10.00 MWh to 9999.99 MWh | |||
When 9-digit display: 0.00 to 9999999.99 kWh | |||
Current | L1(CT1)phase current | A | 0.0 to 6000.0 |
L2(CT2)phase current | A | 0.0 to 6000.0 | |
Voltage | Voltage between 1-2 | V | 0.0 to 9999.9 |
Voltage between 2-3 | V | 0.0 to 9999.9 | |
Electricity charge (Note) |
Yen | JPY | 0 to 999999 |
Dollars | $ | 0.0 to 99999.9 | |
Euros | EUR | 0.0 to 99999.9 | |
Yuan | CNY | 0 to 999999 | |
No currency | CHG | 0 to 999999 | |
Conversion carbon dioxide value | kg-CO2 | 0.0 to 999999 | |
Hour meter | ON time | h(Hour) | 0.0 to 99999.9 |
OFF time | h(Hour) | 0.0 to 99999.9 | |
Pulse input | Count | 0 to 999999 |
Note : Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor can it be legally used for billing.
Rated operating voltage | 100-120/200-240V AC | |
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Rated frequency | 50/60 Hz common | |
Rated power consumption | 8VA (240 V AC at +25 ℃ +77 ℉) | |
Allowable operating voltage range | 85 to 132/170 to 264V 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: 2000 V for 1min | [Use as a power meter] ・ Insulated circuit [between (1) and (2), (2) and (3), (1) and (3)] (1) Power terminal [1 (R), 2 (N and S) and 3 (T)] CT input terminal [CT1 (+), CT2 (+) and CT1, 2 (-)] (2) RS485 terminal (+, -) (3) Pulse output terminal (+, -) ・ Outer edge (case) - all terminals [Use as a pulse counter] ・ Insulated circuit [between (1) and (2), (2) and (3), (1) and (3)] (1) Power terminal [1 (R) and 2 (N)], pulse input terminal [CT1 (+) and 0V] (2) RS485 terminal (+, -) (3) Pulse output terminal (+, -) ・ Outer edge (case) - all terminals |
Insulation resistance (initial) | Between the isolated circuits: 100 MΩ or more (measured with 500 V DC) |
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Vibration resistance | 10 to 55 Hz (1cycle / min), single amplitude: 0.75 mm 0.03 in (1 hour on 3 axes) | |
Shock resistance | Min. 294 m/s2 (5 times on 3 axes) | |
Display method | 6-digit, 7-segment (set value) with backlight and 4-digit, 16-segment (mode), LCD upper section: green, lower section: amber | |
Power failure memory method | EEPROM (more than 100,000 overwrite) | |
Protection | IEC standard IP66 (only front panel with rubber gasket) * Mounted in a row, waterproofing property will be lost. |
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Weight | 140 g approx. (screw terminal type), 130 g approx. (11-pin type) |
Phase and wire system | Single-phase two-wire system Single-phase three-wire system Three-phase three-wire system |
(common) | |
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Input voltage |
Rating | Single-phase two-wire : 100-120/200-240V AC (common) Single-phase three-wire : 100-120V AC Three-phase three-wire : 100-240V AC |
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Allowance | 85 to 110% of rated input voltage | ||
Allowable measurement voltage | Single-phase two-wire : 85-132/170-264V AC (common) Single-phase three-wire : 85-132V AC Three-phase three-wire : 85-264V AC |
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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 240VAC (Allowable measurement voltage). *Secondary current rating of VT is 110V. |
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Input current |
Primary side rating | <Using the dedicated CT> ・5A/50A/100A/250A/400A (Select with setting mode) <Using a commercial CT with the secondary side current 5A> ・1 to 4000A (Set with setting mode) *Use a CT with secondary side current of 5A when measure 400A or more. |
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Special functions |
Cut-off current | 1.0 to 50.0%F.S | |
Hour meter threshold current | 1.0 to 100.0%F.S | ||
Accuracy (without error in CT and VT) |
Basic accuracy |
Instantaneous electric power, Integrated electric power, Electricity charge and Conversion value |
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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 |
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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 | |||
Voltage | |||
Within ± (1.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉ rated input, rated frequency, power factor 1) | |||
Hour Meter | |||
Within ± (0.01 % +1 digit) (at +20 ℃ +68 ℉) [In case power on start or current energizing: Within ± (0.01 % + 1 sec + 1 digit) (at +20 ℃ +68 ℉)] | |||
Temperature characteristics | Within ± (1.0 % F.S. + 1 digit) In case of 5 A CT mode. Within ± (1.5 % F.S. + 1 digit) (Range of -10 to +50 ℃ +14 to +122 ℉, rated input, power factor 1) | ||
Frequency characteristics | Within ± (1.0 % F.S. + 1 digit) In case of 5 A CT mode. Within ± (1.5 % F.S. + 1 digit) (Frequency change ± 5 % based on rated frequency, rated input, power factor 1) |
Input mode | Addition (fixed) | |
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Max. counting speed | 2 kHz/30 Hz (selectable by mode) | |
Pulse input | Min. input signal width: 0.25 ms (when 2 kHz selected)/16.7 ms (when 30 Hz selected) ON : OFF ratio = 1 : 1 | |
Input signal | Contact/No contact (open collector) · Impedance when shorted: 1kohm · Residual voltage when shorted: Max. 2 V · Impedance when open: 100kohm |
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Output mode | HOLD (over count) | |
Number of digits | 6 digits display (0 to 999999)(selectable by mode) | |
Pre-scale setting | Decimal point | Set to 3rd decimal places (Auto-setting) |
Range | 0.001 to 100.000 (Selectable with setting mode) | |
Unit | 「CNT」/「l」/「kl」/「m3」 (Selectable with setting mode) (Count value does not change even if the unit setting is changed during counting.) |
Number of output points | 1 point | |
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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 | 100 µA or less | |
Pulse output unit * | When measuring power | 0.001/0.01/0.1/1/10/100 kWh/Alarm (selectable by mode) |
When measuring pulse input | HOLD (over count) |
* Power and pulse input are not possible at the same time.
Interface | Conforming to RS485 | |
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Protocol | MEWTOCOL/Modbus(RTU)(Depending on part number.) | |
Isolation status | Isolated with the internal circuit | |
Number of connected units | 99 (max.) (Note1) (Note2) | |
Transmission distance | 1200m | |
Transmission speed | 38400/19200/9600/4800/2400bps (selectable with setting mode) | |
Transmission Format | Data length | 8bit/7bit (selectable with setting mode) (MEWTOCOL type) 7bit (fixed) (MODBUS type) |
Parity | Not available/Odd number/Even number (selectable with setting mode) |
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Stop bit | 1bit(fixed) | |
Communication method | Half-duplex | |
Synchronous system | Synchronous communication method | |
Ending resistance | Approx. 120Ω(built-in)(Note3) |
Note 1: | For RS-485 converter on the computer side, we recommend SI-35 (from LINE EYE Co.,Ltd.). |
Note 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. |
Note 3: | Change the sliding switch of main unit as a terminal station. (Factory setting; General side) |
Use the transmission cables shown below for Eco-POWER METER RS485 communication system.
Cable | Conductor | Insulator | Cable diameter |
Applicable cable | ||
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Size | Resistance (at 20℃) |
Material | Thickness | |||
Twisted-pair with shield |
1.25 mm2 0.0019 in2 (AWG16) or more |
Max. 16.8 Ω / km | polyethylene | Max. 0.5 mm 0.020 in |
Approx. 8.5 mm 0.335 in |
HITACHI KPEV-S1.25 mm2 0.0019 in2 × 1P Belden Inc.9860 |
0.5 mm2 0.0008 in2 (AWG20) or more |
Max. 33.4 Ω / km | polyethylene | Max. 0.5 mm 0.020 in |
Approx. 7.8 mm 0.307 in |
HITACHI KPEV-S0.5 mm2 0.0008 in2 × 1P Belden Inc.9207 |
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VCTF | 0.75 mm2 0.0012 in2 (AWG18) or more |
Max. 25.1 Ω / km | PVC | Max. 0.6 mm 0.024 in |
Approx. 6.6 mm 0.260 in |
VCTF0.75 mm2 0.0012 in2 × 2C(JIS) |
Cable | Twisted-pair with shield | VCTF |
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section |
Note 1) | Use shielded type twist cables. |
Note 2) | Use only one type of the transmission cables. Do not mix different types of the cables. |
Note 3) | Use twist pair cables under a bad noise environment. |
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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