KW2G-H Eco-POWER METER (Discontinued Products)

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Discontinued Products
System Configuration
Rating/ Performance
Dimensions
Cautions For Use

Ⅾiscontinued

Last time buy

September 29, 2023

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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Discontinued Products

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System Configuration

Ideal for switchboards or embedded devices

Through the use of an SD memory card for storage, energy data can be gathered without the need for an external data logger or network connection. This allows installation in smaller spaces and in remote locations.

Manage complete systems by capturing measurement data from multiple sources.

Air/water consumption, temperature, humidity, illumination and other measurement data can be monitored by using pulse input type and analog input type expansion units.

Built-In RS485 communication ensures easy system expansion

Connect up to 99 station numbers using the built-in RS485 communication function.

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Rating/ Performance

Measurement items
Power measurement (for AKW2010GB, AKW2020GB, AKW2110GB and AKW2160GB)

Item		Unit	Data display range
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

KW2G / KW2G-H can measure regeneration electric power. Integrated electrical power is not integrated (not subtracted) when detecting regeneration electric power.

While detecting regeneration electric power, minus is displayed on instantaneous active electric power and power factor.

Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor can it be legally used for billing.

Displayed digit of pulse counter differs according to the pre-scale set by pre-scale setting mode.

Pulse input (for AKW2152G)

Item	Data display range
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.

Analog input (for AKW2182G)

Item	Data display range
Converted digital value^*	−999999 to 9999999

* The number of displayed digits of the converted digital values differs according to the preset decimal point position.

Hour Meter (excluding AKW2182G)

Item	Unit	Data display range
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	%	0.0 to 100.0

Excluding AKW2152G

Maintenance time by using pulse input cannot be measured with AKW2110GB or AKW2160GB

Hour meter function can be used only with main unit and one expansion unit.

Accuracy (for AKW2010GB, AKW2020GB, AKW2110GB and AKW2160GB)

Item		Specifications
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
	Voltage	Within ± (1.0 % F.S. + 1 digit) (at +20 ℃ +68 ℉, rated input, rated frequency, power factor 1)
	Temperature characteristics	Within ± (1.0 % F.S. + 1 digit) (Range of -10 to +50 ℃ +14 to +122℉, rated input, power factor 1)
	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)

General specifications

Item	Specifications
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.

Memory specifications of main unit (for AKW2020GB)

Item			Specifications
Logging functions	File type 1 (instantaneous value) ^*1	Save cycle	15 min (00 hr. 00 min 00 sec after the day) (fixed)
		Saved data	(Instantaneous value) Integrated electric power (1) (2), Instantaneous active electric power (1) (2), Instantaneous reactive electric power (1) (2), Instantaneous apparent electric power (1) (2), R-current (1), R (T)-current (2), S (N)-current, R/RS-voltage (1), R (T/TS)-voltage (2), RT-voltage, Power factor (1) (2), Frequency, Count value, Converted digital value for CH0, Converted digital value for CH1, Pulse count value for CH0 and Pulse count value for CH1
		Saved data amount	96 records per file (max. approx. 8 days worth of data)
	File type 2 (difference value) ^*1	Save cycle	15 min (00 hr. 00 min 00 sec after the day) (fixed)
		Saved data	(Difference value) Integrated electric power (1) (2), Count value, Pulse count value for CH0 and Pulse count value for CH1
		Saved data amount	96 records per file (max. approx. 8 days worth of data)
	File type 3 (instantaneous value detail) ^*1	Save cycle	Select among 1 min, 5 min, 10 min, 15 min, 30 min, or 60 min (Saved timing) When 1 min is selected: 00 sec after the minute When 10 min is selected: 00, 10, 20, 30, 40, 50 min after the hour When 60 min is selected: 00 min after the hour When 5 min is selected: 00, 05, 10, 15, 20, 25, 30... min after the hour When 15 min is selected: 00, 15, 30, 45 min after the hour
		Saved data	Integrated electric power (1) (2), Instantaneous active electric power (1) (2), Instantaneous reactive electric power (1) (2), Instantaneous apparent electric power (1) (2), R-current (1), R (T)-current (2), S (N)-current, R/RS-voltage (1), R (T/TS)-voltage (2), RT-voltage, Power factor (1) (2), Frequency, Count value, Converted digital value for CH0, Converted digital value for CH1, Pulse count value for CH0 and Pulse count value for CH1
		Saved data amount	Max. 720 records, 12 hours approx. worth of data (when the save cycle is set to one minute)
	Main unit display		Integrated electric power by day (latest data covering 8 days period) / Integrated electric power by hour (latest data covering 12 hours period)
Calendar timer function			Time accuracy Monthly accuracy: ±30 sec (at +25 ℃ +77 ℉)
Content of battery backup			Time measurement and Log data
Battery life^*2			2 years approx. (at +25 ℃ +77 ℉, in power-off state)

Using the setting mode, you can select whether or not to write to the SD memory card for each of file types 1, 2, and 3. Files can be created for each unit.

When the battery gets low, the BATT display will start flashing. Please replace the battery in accordance with the battery replacing procedure. Also, battery life will be shortened if the main unit is used in a high temperature environment.

While measuring, data is collected in the memory of main unit. If, while measuring, the memory capacity of main unit is reached, data will be overwritten in succession starting from the oldest data. Initialization of the main unit memory is possible.

External memory specifications (for AKW2020GB)
<SD memory card slot>

Item	Specifications
Support media	SD memory card^*1
Supported format standards	SD / SDHC standard conformance

Please use the SLC type SD memory card.

UHS standard SDHC memory cards are not supported.
Log data may not be written to the SD memory card if an SD memory card without operational confirmation is used.

The use of UPS (Uninterruptible Power Supply) is recommended because data damage may occur in case of instant power failure during writing.

Refer to the user manual regarding SD memory card handling.

<Precautions when handling the SD memory card>
Data saved to the SD memory card may be lost in the following cases. Be aware that Panasonic Industry Co., Ltd. assumes no responsibility for any loss or direct / indirect damage of registered data.

If the SD memory card is misused by the customer or a third party

If the SD memory card is effected by electrostatic / electronic noise

If the card is removed or the main unit is turned OFF while the main unit SD memory card access LED is flashing (reading data).

* It is recommended to save important data to other media and always perform backup.

Communication specifications

Item	Specifications
Item	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.^12	-
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)	-
Communication method	Half-duplex	-
Synchronous system	Synchronous communication method	-
Ending resistance	120 Ω approx. (built-in)	-

For RS-485 converter on the computer side, we recommend SI-35 and SI-35USB (from LINE EYE Co.,Ltd.).

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.

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.

With Modbus RTU protocol, it works only with 8-bit.

When using the USB port, install the dedicated USB driver.

Pulse input specifications (for AKW2010GB, AKW2020GB and AKW2152G)

Item		Specifications
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
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
Output mode		HOLD (Over count)
Prescale	Decimal point	Setting possible up to under 3-digit
Prescale	Range	0.001 to 100.000 (Set with setting mode)

Analog input specifications (for AKW2182G)

Item		Specifications
Number of input points		2 channels
Input range (Select with setting mode)	Voltage	0 to 5 V / 1 to 5 V
Input range (Select with setting mode)	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
Input impedance	Current	125 Ω
Absolute maximum input	Voltage	- 0.3 to +10 V
Absolute maximum input	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.

Pulse output (Transistor output) specifications
(for AKW2010GB, AKW2020GB and AKW2160GB)

Item	Specifications
Number of output point	1 point
Insulation method	Photo coupler
Output type / Output capacity	Open collector / 100 mA 30 V DC
Pulse width^*2 (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^12*3	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)^*3 / General purpose output(OUT) / Error alarm(Error)
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)

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.

The min. pulse output cycle is 25ms in order to work correctly and output 1 to 10ms pulse output.

These count output specifications are only for the main unit and expansion unit AKW2160GB.

The pulse output unit should be set as that it output 40 pulses or less in 1 second.
[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.

<SD memory card handling precautions>
To format SD memory cards, please download and use the formatting software available on the Panasonic website.
The file system on a SD memory card that was formatted using standard PC software does not comply with the SD memory card standard.

Data saved on an SD memory card may be lost in the following cases. Please note that Panasonic Industry is not responsible for any losses of recorded data and other direct and indirect damages.
1) When a customer or a third party incorrectly uses the SD memory card
2) When the SD memory card is affected by static electricity or electrical noise
3) When the SD memory card is taken out or the power is turned off while the SD memory card access LED of the unit is flashing (during data writing)
* It is recommended that you constantly back up important data to another medium.

We recommend using this Eco-POWER METER with inserting SD memory card.
If it is not inserted, log data for 8 days will be saved in the internal memory.

We recommend that move or delete logging data in the folder created by KW2G-H regularly (every 1-month). When inserting SD memory card, delete the logging data in the folder created by KW2G-H.

When you turn off the Eco-POWER METER, remove the SD memory card first. If not, it might damage the Eco-POWER METER and SD memory card.

When you turn on the power again, it may access to SD memory card for 25 minutes according to the log data in the internal memory.

DEDICATED CURRENT TRANSFORMER (CT)

Specifications

Item	Clamp-on typ
Item	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
Item	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 :

Dedicated CT are dedicated for low voltage under 440 V AC system. They can not be used for high voltage circuit.

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.

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.

For the AKW8115, KW9M and KW2M, CT with a secondary side current 1 A or 5 A is recommended. Please confirm the specification beforehand.

Dedicated CT are not included with Eco-POWER METERs.

Each dedicated CT includes a 1 m 3.281 ft relay cable, respectively.

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Dimensions

Unit: mm in

KW2G-H

(Main unit) AKW2020GB

(Expansion unit)AKW2110GB/AKW2160GB/AKW2152G/AKW2182G

Dedicated current transformers CT

Dedicated current transformer (CT) Clamp-on type 5A/50A (AKW4801B)

Dedicated current transformer (CT) Clamp-on type 100A (AKW4802B)

Dedicated current transformer (CT) Clamp-on type 250A (AKW4803B)

Dedicated current transformer (CT) Clamp-on type 400A (AKW4804B)

Dedicated current transformer (CT) Clamp-on type 600A (AKW4808B)

Dedicated current transformer (CT) Through type 50A/100A (AKW4506B)

Dedicated current transformer (CT) Through type 250A/400A/600A (AKW4507B/AKW4508B)

Terminal arrangement

Be sure to wire correctly according to the terminal arrangement and wiring diagrams.
After completing wiring, be sure to attach the terminal cover for safety reasons.

Main unit

Expansion unit (Power measurement and Pulse output : AKW2160GB)

Expansion unit (Pulse input : AKW2152G)

Expansion unit (Analog input : AKW2182G)

Wiring diagrams

Single-phase two-wire system
* One dedicated current transformer (CT) is required for one load.

Single-phase three-wire system / Three-phase three-wire system
* Two dedicated current transformers (CT) are required for one load.

Caution for Wiring

1.Terminal fastening torque should be 0.5 to 0.6N･m for M3 screw and should be 0.8 to 1.0N･m for M3.5 screw. In case of using a crimping terminal, use it with insulating sleeve applicable to M3 screw or M3.5 screw.
2.To protect the device, it is necessary to install power switch and circuit breaker in the power supply circuit. And this has no built-in power switch, circuit breaker or fuse for measured voltage input parts. Therefore it is necessary to install them in the circuit near this unit.
3.We recommend a wire with the cross section of 0.75 to 1.25mm² for power supply line and measured voltage input line.
4.Use with 10m or less of the input line and 100m or less of the output line.
5.Use flame-resistant cable for each wiring.

Discontinued products [Order accepted till December, 2016]

(Main unit) AKW2020G

(Expansion unit) AKW2110G/AKW2160G

Dedicated current transformer (CT) Clamp-on type 5A/50A (AKW4801C)

Dedicated current transformer (CT) Clamp-on type 100A (AKW4802C)

Dedicated current transformer (CT) Clamp-on type 250A (AKW4803C)

Dedicated current transformer (CT) Clamp-on type 400A (AKW4804C)

Dedicated current transformer (CT) Clamp-on type 600A (AKW4808C)

Dedicated current transformer (CT) Through type 50A/100A (AKW4506C)

Dedicated current transformer (CT) Through type 250A/400A/600A (AKW4507C/AKW4508C)

------------------------------ Tab5 showing ------------------------------

使用上のご注意

エコパワーメータ使用上のご注意（共通）

※商品別の使用上のご注意は仕様書などで必ずご確認ください。

引火性ガス、腐食性ガスの発生するところや、塵埃の多いところ、油のかかるところ、振動、衝撃の激しいところでのご使用は避けてください。

本体ケースは難燃性樹脂を使用していますが、燃えやすいものの側には設置しないでください。また、燃えやすいものの上に直接置くことは避けてください。

本体カバーはポリカーボネート樹脂製ですから、メチルアルコール、ベンジン、シンナーなどの有機溶剤や、アンモニア、苛性ソーダなど、強アルカリ性物質の付着やそれらの雰囲気でのご使用は避けてください。

当社の商品は当社専用オプション品の使用を前提にしております。他社オプション品との組合せには互換性がありませんのでご注意ください。

インバータの2次側回路では使用しないでください。本体の発熱や故障の原因となります。

計測について

高調波、または波形がひずんでいる場合は、正確に計測できないことがありますのでご採用前に、実機にてご確認ください。

サージについて

操作電源重畳サージが次の値を越えると、内部回路が破壊することがあるため、サージ吸収素子をご使用ください。
サージ電圧 KW1Mシリーズその他
4,000V 6,000V
標準サージ波形
±(1.2X50)μsの単極性全波電圧にて上表の値を耐サージ電圧とする。
サージ波形〔±（1.2×50）μsの単極性全波電圧〕
外部ノイズに対しては、下記の値をノイズ電圧としていますが、これ以上になりますと誤動作、内部回路破壊の原因となりますのでご注意ください。

サージ電圧	KW1Mシリーズ	その他
4,000V	6,000V

	操作電源端子間
ノイズ電圧	1,500V

ノイズ波形（ノイズシミュレータ）
立上り：1ns パルス幅：1μs，50ns
極　性：± 　　　　　周　　期：10ms
※入力ラインに過大なノイズが印加されると、正確に計測できないおそれがあります。

自己診断機能について

表示	内容	出力状態	復帰方法	付記後の状態
ERR0	CPU異常	OFF	電源再投入	CPU異常直前の電源投入時の表示
ERR1	メモリ異常	OFF	EEP-ROM寿命のため本体交換	-

※EEP-ROMの書き換え寿命に達した場合も含む。

停電記憶について

エコパワーメータは、電源OFFした時点（停電保証・記憶）までの積算電力量、アワーメータの値、パルスカウント値、動作状態をEEP-ROMに記憶します。そのため、頻度に電源をON/OFFする環境でのご使用は、できるだけお避けください。EEPROMの寿命が早くなります。

AKW1000の場合

各種設定値を変更する毎に設定値をFROMに記憶し、停電しても停電前のデータを保持しています。頻繁に設定変更するとFROM の寿命が早くなりますので、そのような環境でのご使用はお避けください。

AKW1131Bの場合

エコパワーメータは電源OFFした時点(停電記憶)までの積算電力量、アワーメータの値、パルスカウント値、動作状態をEEPROMに記憶します。また各種設定を変更する毎に設定値をEEPROMに記憶します。そのため頻繁に電源をON/OFFまたは、頻繁に設定変更するとEEPROM の寿命が早くなりますので、そのような環境でのご使用はお避けください。
※特に通信による書込み時はご注意ください。

その他

エコパワーメータは、省エネ目的の自主管理用のため課金目的に使用できません。また、計量法を定める指定機関が行う検定に合格した特定計量器ではありませんので電力量の証明には使用できません。

結線について

結線については各商品ページの寸法図ページに記載しておりますので必ずご確認ください。
なお、共通のご注意点は以下の通りです。

安全、本体の保護やメンテナンス性確保のため、計測電圧入力部、操作電源部にはブレーカ（3～15A）などを設置してください。低圧回路において、VT（計器用変圧器）、CT（電流センサ）の2次側接地は不要です。

電流センサ(CT)の取り付け

エコパワーメータ本体のCT接続部が、コネクタ式の場合は、そのまま本体に接続してください。
エコパワーメータ本体のCT接続部が、ネジ端子式(KW4M、KW8M)の場合は、下図を参照の上、本体側接続コネクタを切断し、加工してご使用ください。
<加工図>
CTは、単相2線式を計測する場合は1つ、単相3線式、三相3線式を計測する場合は2つ、三相4線式を計測する場合は3つ必要です。1台のエコパワーメータに使用する全てのCTは同じ定格容量のものをお使いください。
あらかじめ負荷電線の太さがCTの貫通穴径より小さいことを確認してください。
盤内のメイン渡りバー(ブスバー)など導体が露出している箇所にはCTを接続しないでください。感電のおそれがあります。
CTの接続の際は、必ず先にCTの2次側をエコパワーメータ本体に接続し、その後CTの1次側を負荷電線に配線してください。順序を間違えますと、感電のおそれやCTの故障の原因となります。
CTには極性があります。CTに記載してある方向(K→L)に合わせて、電源側(K)から負荷側(L)に向けて取付けてください。方向を間違えると、正確に計測できません。
CTを閉じる際には、分割面にゴミや異物などがないことを確認してください。また閉じた時には、分割面が密着していることを確かめてください。分割面に隙間があると計測誤差が生じます。(分割型のみ)
高調波、または波形が歪んでいる場合は、正確に計測できないことがありますので、ご採用前に実機にてご確認ください。
計測電圧入力端子、操作電源端子への配線(強電部)とCT単体、CTケーブルはできるだけ離して配線してください。 (磁界やノイズの影響を受け、計測仕様の精度を満足しないことがあります。)

電流センサ（CT）を延長する場合

各種専用電流センサに同梱の中継ケーブルの長さは約1mです。
CTのケーブルを延長する場合、ノイズを全く受けない環境下ではAWG#22以上のケーブルで約10mまで延長できます。極力太いケーブルを使用ください。
※ケーブルを延長する場合は、ご使用前に実機での確認をお願いします。

2次側電流5A CTを接続する場合

2次側電流5A CTと組み合わせて、計測する場合の接続手順

（1） CT 設定モード（CT-T）にて、5A を選択します。

（2） CT1次側電流設定モード（CT-1）にて、計測するCT（2次側電流 5A）の1次側電流を設定します。
〈例〉計測するCT が400A/5A の場合、"400" と設定します。

（3）エコパワーメータに接続した5A用専用CT (AKW4801B) を2次側電流5A CTの2次側に接続します。
CTの方向(K→L)は2次側電流5A CTの方向(K→L) と合わせてください。

※ 2次側電流5A CTと組合わせて計測する場合は、2次側電流5A CTと専用CTとの距離を1m以上離して配置してください。
距離が近い場合は双方の磁界の干渉により、正確に計測できないおそれがあります。

入力の接続について

有接点入力

接点信頼性のよい金メッキ接点のものをご使用ください。
接点バウンス時間はカウント値の誤差になるため、バウンス時間の短いものをご使用ください。この場合、最高計数速度は30Hzを選択ください。

無接点入力(トランジスタ入力)

オープンコレクタで接続してください。
使用するトランジスタの特性としては、V_CEO=20V以上、I_C=20mA 以上、I_CBO=6μA以下のものをご使用ください。また、トランジスタON時の残留電圧1.5V以下のものをご使用ください。
＊短絡時インピーダンスは1kΩ以下としてください。0Ω時、パルス入力端子の流出電流は約7mA 、開放時インピーダンスは100kΩ以上としてください。

入力配線

配線はシールド線、又は単独に金属電線管を使用し、配線長10m以下でご使用ください。長くなると電線の浮遊容量の影響を受け、正常に動作しないおそれがあります。

(注意)
操作電源入力部、計測電圧入力部、パルス入力部は、非絶縁となっていますので、各種信号入力の接続に際し、短絡防止のためにセンサ等入力機器の電源は、図Aのように1次、2次の絶縁された電源トランスで、2次側が接地されていないものをご使用ください。2次側が接地された状態、または単巻トランスを使用された場合は、図Bのように短絡状態となり、商品の内部回路が破壊しますのでご注意ください。

出力の接続について

本商品のトランジスタ出力は、フォトカプラにて内部回路と絶縁されていますのでNPN出力、PNP（等価）出力のどちらにもお使いいただけます。

圧着端子について

圧着端子については各商品ページの寸法図ページに記載しておりますので必ずご確認ください。

低電圧指令について

EN61010－1/IEC61010 - 1を適用する用途にご使用の場合には、以下の条件の下でご使用ください。

本体のパルス出力部は、基礎絶縁のみ確保しています。EN61010- 1/IEC61010 - 1で要求される強化（二重）絶縁を確保するためには、負荷側で基礎絶縁以上、通信システム側で強化（二重）絶縁を確保してください。
電圧入力部にはEN60947 - 1またはEN60947 - 3規格に適合したブレーカを容易に手の届く位置に配置して、それが機器の遮断装置であることを表示してください。
電流センサ（CT）をクランプ（接続）する電線は、基礎絶縁以上のものをご使用ください。

使用環境

汚染度 2、過電圧カテゴリーII、
屋内使用
使用温度範囲/使用湿度範囲：-10～+50℃/30～85％RH（20℃にて結露なきこと）
標高2,000m以下

本体は下記のような場所でご使用ください。

塵埃が少なく、腐食性ガスのないところ。
可燃性ガス、爆発性ガスのないところ。
機械的振動や衝撃がないところ。
直射日光があたらないところ。
大容量の電磁開閉器や大電流の流れている電線から離れているところ。