【Notification of Manufacturer Change for Panasonic Industrial Devices SUNX Products and Panasonic Industrial Devices SUNX Tatsuno Products】
From April 1, 2024, the terms "Panasonic Industrial Devices SUNX Co., Ltd." and "Panasonic Industrial Devices SUNX Tatsuno Co., Ltd."
in this page and in the manuals and other documents to be downloaded will all be replaced with "Panasonic Industry Co., Ltd." and applied accordingly.

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Discontinued
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KW4M Eco-POWER METER (Discontinued Products)

We are sorry, the products have been discontinued. Please refer to the details of the discontinued products and the recommended substitutes list below.

Last time buy September 29, 2023
 
Rating/ Performance

Rating/ Performance

Measurement items

Item Unit Data display range
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.

Main unit

Rated operating voltage 100-120/200-240V AC
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)
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.
Weight 140 g approx. (screw terminal type), 130 g approx. (11-pin type)

Input specifications

Power Input

Phase and wire system Single-phase two-wire system
Single-phase three-wire system
Three-phase three-wire system		 (common)
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
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
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.
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.
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
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
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)

Pulse input

Input mode Addition (fixed)
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
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.）

Pulse output (transistor output)

Number of output points 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 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.

Communication

Interface Conforming to RS485
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)
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)

Recommended cable

Use the transmission cables shown below for Eco-POWER METER RS485 communication system.

Cable Conductor Insulator Cable
diameter		 Applicable cable
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
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
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.

DEDICATED CURRENT TRANSFORMER (CT)

Specifications

Item Clamp-on typ
AKW4801B
AKW4801C		 AKW4802B
AKW4802C		 AKW4803B
AKW4803C		 AKW4804B
AKW4804C		 AKW4808B
AKW4808C
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)
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
AKW4506B
AKW4506C		 AKW4507B
AKW4507C		 AKW4508B
AKW4508C
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)
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
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.
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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