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YOKOGAWA 2041 User Manual

YOKOGAWA 2041
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— 10 —
IM 2041-01
3. 乗数表の使い方
(1) 単相電力計の場合
計器の側面に貼付けられた説明銘板の乗数表は,120 区分に統一され
た目盛で読み取った値を電力値に換算するときに使用します。
求める電力が式 1 で得られます。
負荷電力=計器の読み×乗数 ・・・ 式1
乗数は,式 2 で与えられますが使用電圧,電流レンジに応じて表から
引いてください。
定格電流(A)×定格電圧(V)×定格力率(1.0)
全目盛数(120)
乗数= ・・・ 式2
Multiplier constant
120 V
1
5
240 V
2
10
Voltage range
Current range
1 A
5 A
例) 定格電流1/5 A,定格電圧120/240 V 計器
(2) 単相低力率電力計の場合 *
乗数は,式 3 で与えられますが使用電圧,電流レンジに応じて表から
引いてください。
定格電流(A)×定格電圧(V)×定格力率(0.2)
全目盛数(120)
乗数= ・・・ 式3
Multiplier constant
120 V
0.2
1
240 V
0.4
2
Voltage range
Current range
1 A
5 A
例) 定格電流1/5 A,定格電圧120/240 V 計器
* 単相低力率電力計 (2041 11 2041 22)は,受注停止製品です。
3. Using the Table of Range-multiplier Constants
(1) Single-phase Wattmeter
The table of range multipliers shown on the label on the side of the
wattmeter is used to convert the value read on the 120-division scale to a
power value. In other words, the power can be calculated from equation 1.
… Eq. 1
Load power = meter indication × range multiplier
The range multipliers depend on the voltage and current range settings and
are calculated from equation 2.
Range multiplier
=
rated current (A) × rated voltage (V) × rated power factor (1.0)
Eq. 2
number of divisions (120)
Example:
Instruments with a rated current of either 1 A or 5 A and
a rated voltage of 120 V or 240 V.
(2) Single-phase low-power wattmeter*
The range multipliers depend on the voltage and current range settings and
are calculated from equation 3.
Range multiplier
=
rated current (A) × rated voltage (V) × rated power factor (0.2)
Eq. 3
number of divisions (120)
Example:
Instruments with a rated current of either 1 A or 5 A and
a rated voltage of 120 V or 240 V.
* Single-phase low-power wattmeters (Model 2041 11 to 2041 22)
have been discontinued.

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YOKOGAWA 2041 Specifications

General IconGeneral
BrandYOKOGAWA
Model2041
CategoryMeasuring Instruments
LanguageEnglish

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