Ideal nd2396 用户手册

• The power clamp processes the three sets of data and cal-

culates the true power (kW) of the system, which is shown
on the main display, and the power factor (PF), which is
shown on the upper display.  RST is shown on the LCD dis-
play to indicate that this is a measurement of the total sys-
tem.

• Pressing the 3

φ

KVAR KVA button toggles to display the

apparent power (kVA) of the system, which is shown on the
main display, and the reactive power (kVAR), which is
shown on the upper display.

• Pressing the READ NEXT button clears the stored data from

memory and readies the power clamp for another three
phase 3-wire calculation.

Power Factor Corrections 
A positive power factor indicates that an inductive load has
brought the power system out of phase.  Based on the kVAR
values of the system, capacitors are available to improve the
power factor.  By measuring the frequency, phase voltage and
kVAR of the system, you can calculate the capacitive load
required for this correction.  Single phase capacitors can be
used in a 1

φ

2W or 3

φ

4W systems.  Three phase capacitors are

available for 3

φ

3W and 3

φ

4W systems.

Determining the Required Capacitor Value
• Measure the kVAR

3

φ

3W

value of the power system.

• The capacitor value required can be calculated based on the

following equation:

Capacitance (Farad) = 

f = frequency rating of the system
V = phase voltage

• It is recommended that the KVAR value of the capacitor be a

little less that the measured value.

General Specifications
Indoor Use
Conductor Size:

Cable 

φ

55mm (approx.)

Bus Bar 65mm (D) x 24mm (W)

Battery Type:

9V

Display:

2 x 4 Digits Dual Display LCD

Range Selection:

Auto

Overload Indication:

OL

Power Consumption:

25mA (approx.)

Low Battery Indication:
Sampling Time:

0.5 sec. (V and A)
1.6 sec. (W)

Operating Temperature: 4°C to 50°C
Operating Humidity:

Less than 85% relative

Altitude:

Up to 2000M

Storage Temperature:

-20°C to 60°C

Storage Humidity:

Less than 75% relative

Note:  The “+” sign on the jaw must face the power source
for correct measurement.

Note:  In the 3

φ

4W power measurement, all three W

R

or W

T

or W

S

must be positive.  If one of the three phases has a

negative power, check the connections and clamping and 
re-measure the phase to obtain correct power and power 
factor measurements.

kVAR * 1000

2

π

fV

2