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WM3 Digital Watt meter
- Effective power indication by RMS measurement
- No need for a converter through voltage and current measurement methods
- Maximum measurement range of 220 V a.c.
- Various outputs (relay 4-20 mA d.c. open collector)
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▍Specification

Power Supply

100 - 240 V a.c. 50 - 60 ㎐ Allowable percentage of voltage difference : 85 ~ 110 %

Power consumption

6 VA

Display type

7 Segment LED Display

Insulation resistance

Above 100MΩ (500 V d.c. mega standard) between external terminal and case

Max voltagedurability

Above 2000 V a.c. per 1 min between external terminal and case

Max noise durability

Square wave noise due to noise simulator, pulse width 1 ㎲ ±1000 V

Max vibration

durability

Malfunction

double amplitude in each 0.5 mm X, Y, Z direction for 1 hour

Durability

double amplitude in each 0.75 mm X, Y, Z direction for 2 hours

Max shock

durability

Malfunction

100 m/s² each X, Y, Z direction for 3 times

Durability

300 m/s² each X, Y, Z direction for 2 times

Ambient temperature

-10 ~ 55 ℃ (No freezing allowed)

Ambient humidity

Relative humidity 35 ~ 85 % R.H.

Ambient environment

Corrosiveness gas not allowed

Storage ambient temperature

-20 ~ 65 ℃ (No freezing allowed)

Relay life

Mechanically : 20,000,000 ps Min.

Electrically : 100,000 ps Min.

Weight

Approx. 300 g

▍Suffix code

Model

code

Information

WM

Digital Wattmeter

External dimension

3

 

 

 

External dimension (96mm X 48mm)

Type of phase

1

 

 

Single phase 2 W

Measurement input

specification

01(※)

 

XXX: 5A (general C.T uses)

Current transfrom ratio setup

(C.T excluded)

02(※)

 

XXX: 1A (general C.T uses)

Current transfrom ratio setup

(C.T excluded)

03

 

0 ~ 2.5A(H-1W C.T uses)

0-500.0 W Max(C.T included)

04

 

0 ~ 5A(H-1W C.T uses)

0-1100 W Max(C.T included)

05

 

0 ~ 10A(H-1W C.T uses)

0-2200 W Max(C.T included)

06

 

0 ~ 15A(H-1W C.T uses)

0-3300 W Max(C.T included)

07

 

0 ~ 30A(H-2W C.T uses)

0-6600 W Max(C.T included)

08

 

0 ~ 50A(H-2W C.T uses)

0-11.00 KW Max(C.T included)

09

 

0 ~ 80A(H-4W C.T uses)

0-17.60 K W Max(C.T included)

10

 

0 ~ 100A(H-4W C.T uses)

0-22.00 K W Max(C.T included)

11

 

0 ~ 150A(H-5W C.T uses)

0-33.00 KW Max(C.T included)

12

 

0 ~ 200A(H-5W C.T uses)

0-44.00 K W Max(C.T included)

Output specification (option)

N

only for display

0

Relay (HI, GO, LO) + Current output (4 - 20 ㎃)

1

Relay(HI, GO, LO)

2

NPN TR(HI, GO, LO) + Current output (4 - 20 ㎃)

3

PNP TR(HI, GO, LO) + Current output (4 - 20 ㎃)

4

NPN TR(HI, GO, LO) + RS485 Output

5

PNP TR(HI, GO, LO) + RS485 Output

◾C.T( Current Transfomers)

※ Spec 01 and 02 use general current transformer and users must set current transform ratio (Refer to setting method of current transform ratio)

spec 03 ~ 12 are accurate measuring wattmeter which uses H series C.T of accuracy 0.2%.

◾Cautious

spec of 03 ~ 12 cannot use general current transformer and it is unnecessary to set current transform ratio.

- Type of measuring spec is single phase 2 lines and when current transformer is 200 A : 5 A, then please purchase WM2-101 and use it. (if current transformer is 200A : 1A then please use WM3-101)

- Initial current transformer setting for spec 01 and 02 is set with 100 A

- Output spec 0 ~ 5 are option

- PV (output displaying value)

- RS485 output spec is coming soon

▍Dimension & Panel cutout

[Unit : ㎜]

■ Dimension

Dimension

■ Panel cutout

Panel cutout