Conventional Metering

Rapid developments in meter technology have brought the “Electronic Meter” to the forefront. Utilities all over the Pakistan are going in for installation of this meter on their systems to cut down on revenue losses.
Transfopower went ahead with successful designing and development of its own Static single phase 2-wire and Static three phase 4-wire whole current energy meters with multi-rate Tariff. These meters, locally manufactured by Transfopower Industries Pvt Ltd meet or exceed Electric Utilities specifications and has been approved by it for installation on Electric Utilities system. To keep up with rapid development in meter technology and production techniques, Transfopower has made significant investment for procuring the latest and most sophisticated machinery and equipment for the manufacture of components and parts. Today Transfopower manufacturing facilities can be compared with any international meter manufacturing facility in the world.

Product Range

• Static 1-Phase, 2-Wire Energy Meter – Model: TPI12
• Static 3-Phase, 4-Wire, 3 Energy Meter – Model: TPI34
• Static 3-Phase, 4-Wire, CT operated meters

Static 1-Phase, 2-Wire Energy Meter – Model: TPI12

Technical Specifications

• Wire Connection: 1-Phase, 2-Wire
• Reference Voltage: 240/230V
• Current Range: 10(40) A
• Reference Frequency: 50Hz
• Accuracy Class: 1.0
• Power Consumption: < 10VA & < 2W
• Degree of Insulation & Protection: IP54
• Meter Constant : 3200imp/Kwh
• Operating Temperature: -40°C to + 85°C
• Display Type: Large 8-Digit LCD Display
• Highly integrated SOC (System-on-Chip) Metering IC
• EEPROM (Non-volatile Memory) for Data retention
• Liquid Crystal Display (LCD) for displaying different quantities like Meter-ID, KWh, MDI etc.
• Long life 3.6V Lithium-ion battery (To make the display on even during power failures, MDI and TOU functions).
• Industrial Grade Components (resistors, regulators, capacitors)
• High quality Sensors (CT and Shunt) to ensure smooth metering for full range of loads.
• State of the art PCB (Printed Circuit Board), designed to cater for EMC and EMI sensitivity.
• Meter Cover Open detection.
• Wide operating range [90V~400V]
• High accuracy (< 20ppm) crystal oscillator
• Addition of 5 LEDs at the front of the meter indicates the current operation on meter.
• Low battery indication.
• Data retrieval through gadgets.

Static 3-Phase, 4-Wire, 3 Energy Meter – Model: TPI34

Technical Specifications

• Designed as per NTDC Specification DDS60:2007 (amended to date) and K-Electric Specifications
• 10(100)Amps, 3x230V, 50Hz Class 1.0 (kwh) and Class 2.0 (Kvarh)
• 3/Phase,4-Wire Metering (Residential, Commercial and Industrial)
• Multi-rate with up to 4 tariff TOU structure.
• Kwh, Kvarh and MDI (kW, kvar) with last 12 months billing.
• Load profile channels with programmable sampling intervals.
• Local registration of events and alarms with date/time stamping.
• Wide operating range [100~415V].
• Low power operation to max battery life during Power outage.
• Meter Cover open detection.
• Optical communication conforming to IEC 62056-21.)
• Conforms to IEC 62052-11, 62053-21 and 62053-23.
• Meter internal password (as per IEC 62056-21 Mode C).
• Self-diagnostics and error codes
• UV-Stabilized LCD for extreme temperature conditions.
• Extensive LCD display with line information (L1, L2, and L3) warnings and alarms, power flow direction, Alpha-Numeric Segments etc..
• Programmable Demand (MD) interval with options for Block/slide mode.
• Self-calibration process (to save time and manual error feeding).

Advanced Features

• Protection against the effect of 0.7T Radar Magnet.
• Metering on any two wires.
• Reverse Polarity.
• Reverse phase sequence.
• Reverse Energy.
• Immunity to harmonics and supply distortion.
• Power outage events.
• Over and under voltage alarms.
• Over load detection.
• Optical communication events (programming/reading).
• PC Software.
• User-friendly windows based PC Software.
• User management and security access levels.
• Load profile records in tabular and graphical formats.
• Redundant power supply (meter operative on any two wires).
• Events with date and time stamps.
• TOU Structure.
• Separate READ and WRITE access levels.
• M.D interval, RTC settings and billing date/time.
• Load profile selection and records.
• Event configurations.

Static 3-Phase, 4-Wire, CT operated meters

Technical Specifications

• kWh, kVAh, kvarh pulse outputs.
• Load profile & Multi-rate.
• Suitable for commercial billing, FITs & ROCs.
•Accordance with the latest version of relevant IEC 62052-11, IEC 62052-22 (class 0.2S and 0.5S) and IEC 62052-23 (class 2 reactive)
• Multi Rate (TOD/TOU) static/solid state three (3) phase, four (4) wire, CT & PT operated energy meters capable to record the following energies along with other quantities and built-in programmable features:
• Active energy export (KWH)
• Reactive energy Export (KVARH)
• Active energy Import (KWH)
• Reactive energy Import (KVARH)
• Apparent energy (KVAH)
• Maximum demand of active energy (KW)
• Maximum demand of reactive energy (KVAR)
• Maximum demand of apparent energy (KVA)

• 3-phase, 4-wire suitable for operation in conjunction with 110V AC, 50Hz voltage from system voltage transformer and 5A or 1A ampere current from the system current transformer. The ratings as under:-

Rated (Max.) current, In (Imax.)        5(10)A
Reference Voltage                              3×63.5/110V, 3×230/400
Reference Frequency                         50Hz
Reference Temperature                     23°C
Accuracy Class                                    1.0S & 0.5S for active and 2s & 1s for Reactive energies
Protection Degree                               IP51