Yokogawa CW120, CW121 Application Note

Clamp-on Power Meter

CW120 Application Notes

Yokogawa Meters & Instruments

Measurement of Cogeneration

Received

Actual Order!

Introduction Example: Monitor generating efficiency & electric energy

of cogeneration for 6 months to one year

Points : -Compact & easy to carry around

-Possible to measure more than 1 year with use of large volume memory

Cogeneration system flow

Supply to other load

Inverter

Converter

Transformer

←Electric

Commercial

Power

(Ventilation)

(Lighting)

Power

Generated Output

Exhaust
heat

Waste gas

heat exchanger

Generator

Micro gas-turbine

Monitoring

Hot water supply

Water Supply Boiler

Example: Super Markets/Hotels/Hospitals/Buildings/First Food Restaurants

Application # CW120-001

Energy Saving for Air-conditioning & Freezing machine

Introduction Example: Measure electric energy of Air-conditioning

and compressor of Freezing machine to check energy-saving effect

コンプレッサー対策２

12:55:00

12:56:30

時刻

Before

12:58:00

12:59:30

13:01:00

13:02:30

13:04:00

Point: Min data saving interval is 1 second

Can be measure electric energy for stand

up characteristics & Intermittent control
operation

Convenient to use external I/O
terminal when you use multiple units

After

対策後 インバータ ｋＷ＿２ 対策前 総計 ｋＷ

3.0

2.5

2.0

1.5

1.0

電力量　「ｋWh」

0.5

Electric energy

0.0

12:37:00

12:38:30

12:40:00

12:41:30

12:43:00

12:44:30

12:46:00

12:47:30

12:49:00

12:50:30

12:52:00

12:53:30

13:05:30

13:07:00

13:08:30

13:10:00

13:11:30

13:13:00

13:14:30

13:16:00

13:17:30

室外機

Outdoor equipments

Building
ventilation

Intermittent control
operation of compressor

室外機

Outdoor equipments

Application # CW120-002

Freezing
Machine