PEWM-3C-1 Portable single-phase energy standard class 0.2
The single-phase energy standard PEWM-3C-1 is used for a quick check on site of all types single-phase electricity meters . for active, reactive or apparent energy, electromechanical and electronic. Voltage and current are measured at the same time. The current can be measured with a current clamp to 100A. The current clamp is electronically compensated.
Error of the electricity meter can be determined. The disc revolutions or the pulses from the electricity meter can be counted with a universal scanning head (type EH 11) or manually with the help of a hand switch. The scanning head is suitable for disk flag detection (red or black), or LED pulses from electronic meters (square, pulse, or modulated). The registers of the electricity meter can be tested too, a preliminary quantity of energy being set in this latter case.
Other functions of the device are indication of the numerical values of current, voltage, phase shift, power, cos &phi and harmonic distortion measurement; drawing of two input signal waveforms in real time (two beam oscilloscope).
The device is powered from the voltage measuring circuit or from an auxiliary supply.
200 screen displays of error or vector diagram measurement can be memorized in a non-volatile memory and transferred to a computer via RS 232. The PEWM-3C-1 Software is operating under Windows (Win 98, XP, Vista). The program transfers the readout data into a database, and can perform search with different criteria and print of reports.
The PEWM-3C Software is working under Windows (Win 98, XP, Vista). The program transfers the readout data into a database, and can perform search with different criteria and print of reports.
TECHNICAL DATA OF PEWM-3C-1
| Power Supply | |
| auxiliary | 230 V ± 15% , 50/60 Hz |
| from the measuring circuit | 57V ÷ 450V(phase-to-neutral |
| Power consumption | max 5 VA |
| Dimensions | 220 x 130 x 60 mm |
| Weight | 1.4 kg |
| Housing | plastic |
| Operation temperature | -10°C ÷ +60 °C |
| Relative humidity | Max 95% at 25 °C, non condensing |
| Pulse output | 50 000 imp/ kWh (kVarh) |
| Back lit LCD display | 160 x 128 pixels |
| Degree of protection | IP52 |
| Jaw capacity of 100A CC | 12 mm diameter |
MEASUREMENT RANGES
| Range of voltage (phase-neutral) | 5.000V ÷ 300.00V |
| Range of current (100A CC) | 0.010A ÷ 120.00A |
| Range of phase angle | 0.0° ÷ 359.9° |
| Range of frequency | 40.000Hz ÷ 70.000Hz |
| Range of power factor | -1.00 ÷ +1.00 |
MEASUREMENT ERROR
| ERROR [%] class 0.2 | RANGE | |
| Voltage (phase-neutral) | ± 0.1 | 50.00V ÷ 280.00V |
| ± 0.2 | 5.00V ÷ 49.99V | |
| Current (100A CC) | ± 0.2 | 0.100A ÷ 100.00A |
| Active power (100A CC)* | ± 0.2 | 0.100A ÷ 100.00A |
| Apparent power (100A CC) | ± 0.2 | 0.100A ÷ 100.00A |
| Reactive power/energy (100A CC)* | ± 0.4 | 0.100A ÷ 100.0A |
| Frequency | ± 0.02Hz | 45.00 ÷ 65.00Hz |
| Power factor | ± 0.5% | -1.00 ÷ +1.00 |
SAFETY TESTS
ACCORDING TO EN 61010-1, IEC 61010-2-032
EMC TESTS
ACCORDING TO EN61000-4-2, EN61000-4-4, EN61000-4-5, EN61000-4-6
FUNCTIONALITY
ACCORDING TO IEC 60736
MEASUREMENT CATEGORY III
ACCESSORIES:
| -Voltage Cables . 2 m (2 units) | - PEWM-3C-1 Software | - Hand Switch |
| -Optical Scanning Head and Frame | - Instructions Manual | -Transport Case Peli. 1430 |
| -Compensated current clamps 100 A | - Crocodile clips | - Power Supply Cable |
FUNCTIONS OF PEWM-3C
General measurement
The true RMS values of voltage and current, the angle between them, active and reactive power and the frequency are indicated in this mode.
Error measurement
The device indicates the electricity meter error in [%] and the true value of energy in this mode. The delivery of pulses is traced with a bar-graph.
The pulses or revolutions number “r”, the constant of the electricity meter “X” are preset by the operator.
The measurement can be changed for active, reactive and apparent energy. The operator can enter the pulses manually or with the help of a scanning head.
Register error measurement
The value of energy is preset in this mode. The measurement is started and stopped by the operator using the relevant button. The error of the register is indicated in [%].
Harmonics
The harmonic content of each input signal of voltage or current can be measured in this mode. The amplitude in [%] of the 1st harmonic and the initial phase of the odd harmonics up to the 29th are indicated. The value to expand into harmonics is determined by the operator among the 2 input signals. The measurement and the corresponding screen display are renewed every two seconds.
Oscilloscope
Two signals are drawn on-line on the display. The signals are selected by the operator. Near the waveforms, the true RMS value of the corresponding signal in [V] or [A] is displayed.
Memory
200 electricity meter measurements can be stored in a non-volatile memory, and transferred to a computer via RS 232. The following data are stored: number of electricity meter (alpha-numerically); the current, voltage and power factor values; error of the electricity meter; the transformation ratio, regime. The program in the computer works under Windows 95, 98, XP and has the following features: printing of protocol; archive file organization; data search from the archive.