— 2 —
IM 2039-01
±
1A
5A
Fig.1
説明銘板
Instruction Label
零位調整器
Zero Adjust Screw
ミラー
Mirror
指針
Pointer
目盛板
Dial
電圧端子
Voltage Terminals
電流端子
Current Terminals
目 盛：
目盛は
力率目盛
（cosϕ：Lead0 〜 1.0 〜 Lag0，有効目盛範囲
Lead0.5 〜 1.0 〜 Lag0.5）および線間電圧と負荷電流（基本
波成分）の
位相角目盛
（Lead90°〜 0°〜 Lag90°，18 区分）
との二重目盛になっています。
電圧端子：
電圧結線をする端子で，単相結線の場合は P
2
, P
3
を短絡して
使用し，三相結線の場合は P
1
, P
2
, P
3
それぞれを各電線路に結
線します。電力計と対比した場合，P
1
が共通端子となります。
定格電圧は 120 V ですが，60 〜 300 V まで使用することが
できます。
電流端子：
負荷電流を結線する端子で，極性関係を表わすために “±” の
記号と他の端子には各定格電流が記入されています。
Scale:
The scale is two-layered and consists of:
• a power-factor scale, where the power factor (cos
ϕ
) is graduated
over the range from Lag 0 through 1.0 up to Lead 0 and the effective
scale range is defined as ranging from Lag 0.5 through 1.0 up to
Lead 0.5; and
• a phase-angle scale based on the angle formed between the line
voltage and load current (fundamental-wave component), where the
phase angle is graduated by a total of 18 divisions over the range
from Lag 90° through 0° up to Lead 90°
Voltage Terminals:
These are used for the voltage connection. In single-phase
connection, short-circuit the P
2
and P
3
terminals. In three-phase
connection, connect the P
1
, P
2
and P
3
terminals to their respective
lines. When compared with a wattmeter, the P
1
terminal serves as
the wattmeter's common terminal. The rated voltage is 120 V, but
the meter can be applied voltages ranging from 60 to 300 V.
Current Terminals:
These are used to lead the load current. One of the terminals
is marked with “±” to show the polarity relation to the voltage
coil, while the two other current terminals are marked with the
respective rated current value.