Kannect Engineers Private Limited

The electrical power meter, Xpert is a micro-controller based unit which measures various electrical parameters, and sequentially displays on a 128x64 backlit LCD.

The unit measures the three phase voltages, currents, frequency, power factors, individual Harmonic data as Histogram including Total Harmonic Distortion as well as individual current and voltage waveforms for all three phases. Based on these inputs, the system KVA, KW and KWh can also be calculated.

For the correct operation of the unit, the only basic care required is to ensure that the phase sequence of the three phases is R-Y-B and the polarity of the CT secondary is correct.

The unit is fully solid state and will give years of trouble-free service once installed correctly.

Features:

• Compact 96 X 96 X 55 mm
• Graphical Display 128 X 64
• Accuracy: Class 1.0 & Class 0.5 (Optional)
• Odd Harmonics up to 15th of individual Voltage and Current waveforms including THD
• RS485 port for Communication EMS/ PLC/ SCADA (Optional)
• Dual Source Measurement (Optional)
• Two Relays - individually programmable for Alarm/ Trip (Optional)
• Histogram & Tabular display of Harmonic content
• Wave shape display for all voltages & currents

The electrical power meter, SLM-PRO is a micro-controller based unit which measures various electrical parameters, and sequentially displays on a 4x3 7- Segment display. The meter has three LEDs in the front, one to calibrate energies, one to indicate the status of RS485 communication and one to indicate conversion from kilo to mega. The display consists of three rows of four-digit seven segment red LEDs of 0.56 inches. Twenty four LEDs in two columns on either side of the display indicate the various parameters being shown.

The unit is meant for use in three phase four wire/ three wire and Single phase two wire systems. In three phase four wire LT systems, it requires four wires from R, Y, B & N, in addition to six wires from the three current transformers mounted on the three phases. It thus uses the three wattmeter method to arrive at the system KVA and KW. On the other hand, for use in three phase three wire system, it requires three phases from the PT secondary (usually 110 VAC) and only four wires from the HT current transformer secondary of two phases. The KVA and KW are calculated by the two wattmeter method. In single phase two wire LT systems, it requires two wires from R & N, in addition to two wires from the single current transformers mounted on the single phase. It thus uses the single wattmeter method to arrive at the system KVA and KW.

The unit measures the three phase voltages, currents and individual power factors, KW, KVA, KVAr and THD for voltage and Current for all three phases. Based on these inputs, the system KVA, KW and KVAr can also be calculated. Unit also measure System KWh (Import, Export and Net), KVAh (Import, Export and Net), KVARh (Import, Export and Net).

For the correct operation of the unit, the only basic care required is to ensure that the phase sequence of the three phases is R-Y-B and the polarity of the CT secondary is correct. The S1 terminal in every CT will go to the M terminal of unit. Similarly, the S2 end of the CT will go to the L terminal of the unit.

For Power Quality Analysis – SLM-PRO measures individual harmonics for all voltage and current waveforms, both even and odd, up to the 30th order, with THD as per IEC 61557-12. It also records in its non-volatile memory with date and time stamp, twenty Interruption events and thirty SAG/SWELL events, as per IEC 61000- 4-30 standard.   

Dual Source Measurement(Optional) Alarm on: Avg. V, Avg. A, PF, KVA,KW, KVAR, Demand
Two individually programmable relays (Optional) 5A @ 230 VAC,Resistive load

Trinity introduces the XPERT-PLUS, an easy-to-use, accurate and very versatile electrical power meter with innovative features, which is ideal for remote monitoring of electrical installations, Energy accounting and management, Demand Control, tenant billing and Power quality analysis. Class 0.5s accuracy for Active energy as per the IS14697. User selectable CT and PT Ratios. 5A or 1A operation, eld selectable. Harmonic measurement: All six waveforms up to 30th order, even and odd, including THD. Demand Measurement: Fixed or Sliding for KW, KVA, KVAR and Avg.Amps. Histogram and Tabular display of Harmonic content. Two Relays-individually programmable for Alarm/Trip. Event logging of Sags, Swells and Interruptions as per IEC 61000-4-30. Measurement of all three types of Power Factors – True, Displacement and Distortion. 3P4W, 3P3W and 1P2W connections. Graphical Display 128x64. The meter has three LEDs in the front, one to calibrate energies, one to indicate the status of RS485 communication and one to indicate load on DG.