Three Phase Multifunctional Standard CL3112D

CL3112D is a high-precision, multi-function three-phase standard energy meter. It is used for testing and calibration of energy meters, power terminals, and other power meters. It can also calibrate 0.05 grade and lower energy meter testing devices, as well as other measuring devices.

Reference Standard Meter CL3112D, front view

Reference Standard Meter CL3112D, rear view

Product Features

Measure three-phase voltage, current, phase angle, power factor, frequency, etc. ;
Measure the distortion of three-phase voltage and current, and measure and analyze harmonic from the 2nd to 64th order;
Measure the waveform of spikes, flat-tops, odd harmonics, sub-harmonics, higher harmonics, zero-crossing points as specified in R46 ;
Measurement displays full-wave power / energy, fundamental wave power / energy, total harmonic active power / energy, individual harmonic active power / energy, etc., for three-phase four-wire, three-phase three-wire, and single-phase wiring configurations.

Technical Parameters

Voltage Measurement
Voltage Range	30 V … 720 V
Voltage Accuracy	± 0.02% (30 V ≤ U ≤ U max)
Current Measurement
Current Range	1 mA … 120 A
Current Accuracy	± 0.02% (10 mA ≤ I ≤ 120 A); ± 0.05% (1 mA ≤ I < 10 mA);
Phase Measurement
Phase Range	0.00° … 359.99°
Phase Accuracy	± 0.01 (I ≥ 10 mA, U ≥ 30 V)
Frequency Measurement
Frequency Range	40 Hz … 70 Hz
Frequency Accuracy	± 0.01 Hz
Power Factor Measurement
Power Factor Range	– 1.0 … 0 … + 1.0
Power Factor Accuracy	± 0.0005
Power Measurement
Active / Reactive / Apparent Power Accuracy	± 0.02% (30 V ≤ U ≤ U max, 10 mA ≤ I ≤ I max, PF ≥ 0.5)
Electrical Energy Measurement
Active / Reactive Energy Meter Accuracy	± 0.02% (30 V ≤ U ≤ U max, 10 mA ≤ I ≤ I max, PF ≥ 0.5)
Pulse Inupt / Pulse Output	0 … 50 KHz
Harmonic Power / Energy	± 0.2% RD+ 0.1% RG (2nd … 20th) ± 0.6% RD + 0.15% RG (21st … 64th)
Other Indicators
Operating Power Source	AC 220 V ± 10%, 50 Hz ± 5%
Power Consumption / Warm-up Time	< 120 VA/< 30 mins
Dimensions (mm)	(W × H × D): 485 × 133 × 500
Weight	Approx. 19 kg

Meter Constant Table

CL3112D power constants
	60 V	120 V	240 V	480 V	600 V
0.01 A	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹
0.02 A	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹
0.05 A	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹
0.1 A	1.8 x 10⁹	1.8 x 10⁹	1.8 x 10⁹	1.25 x 10⁹	1.0 x 10⁹
0.2 A	1.8 x 10⁹	1.8 x 10⁹	1.25x 10⁹	6.25 x 10⁸	5.0 x 10⁹
0.5 A	1.8 x 10⁹	1.0 x 10⁹	5.0 x 10⁸	2.5 x 10⁸	2.0 x 10⁸
1 A	1.0 x 10⁹	5.0 x 10⁸	2.5 x 10⁸	1.25 x 10⁸	1.0 x 10⁸
2 A	5.0 x 10⁸	2.5 x 10⁸	1.25 x 10⁸	6.25 x 10⁷	5.0 x 10⁷
5 A	2.0 x 10⁸	1.0 x 10⁸	5.0 x 10⁷	2.5 x 10⁷	2.0 x 10⁷
10 A	1.0 x 10⁸	5.0 x 10⁷	2.5 x 10⁷	1.25 x 10⁷	1.0 x 10⁷
20 A	5.0 x 10⁷	2.5 x 10⁷	1.25 x 10⁷	6.25 x 10⁶	5.0 x 10⁶
50 A	2.0 x 10⁷	1.0 x 10⁷	5.0 x 10⁶	2.5 x 10⁶	2.0 x 10⁶
100 A	1.0 x 10⁷	5.0 x 10⁶	2.5 x 10⁶	1.25 x 10⁶	1.0 x 10⁶

The table refers to the automatic settings. It's valid for 3 wire- and 4 wire measuring mode.

The output frequency for end of range in voltage/current pair with three phase connection is 50 kHz. The power pulses are on TTL/CMOS level. The burden capacity is > 20 mA.

Calculation formulas

Frequency

\displaystyle f = \frac{3 \cdot UR \cdot IR \cdot c}{1000 \cdot 3600}

f = frequency
UR = voltage range
IR = current range
c = reference meter constant

Constant

\displaystyle c = \frac{1000 \cdot 3600 \cdot f}{3 \cdot UR \cdot IR}

The meter constants can be set in the settings menu or selected automatic. Setting range is 1 i/kWh to 2 x 10⁹ i/kWh.

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published: 13 Jan, 2026