Larsen and Toubro Limited

Hyderabad, Telangana

True RMS measurement of voltage and current parameters are achieved by single function Ammeter (WL1110 / WL1310) and Voltmeter (WL1120 / WL1320) series. These are available in Class 1 and 0.5.

Salient features

• Accuracy Class 1 as per IEC 62053-21 and Class 0.5 as per IEC 62053-22
• True RMS measurement
• Password protection site selectable
• Auto and manual scrolling.
• Field programmable CT, PT ratio
• Site selectable 1A/5A
• Phase wise and average display of voltage and current as per applicable meter
• Inbuilt selector switch for 3 phase models
• Site selectable for 3 Phase 4 wire, 3 Phase 3 wire, 1 phase
• Wide operating range of 80 to 300 V AC auxiliary supply in 4110 series
• Suitable for 50/60 Hz

Measurement of Voltage, Current and Frequency with power factor makes this a compact and competitive solution to replace analog meters and associated selector switches with it. The VAF + PF WL4110 series is available in Class 1 and 0.5 with optional RS485 port.

Parameters:VLL, VLN, A, F, PF, On Hrs, RPM, Apeak.

Salient features

• Accuracy Class 1 as per IEC 62053-21 and Class 0.5 as per IEC 62053-22
• True RMS measurement
• Password protection site selectable
• Auto and manual scrolling.
• Field programmable CT, PT ratio
• Site selectable 1A/5A
• Phase wise and average display of voltage and current as per applicable meter
• Inbuilt selector switch for 3 phase models
• Site selectable for 3 Phase 4 wire, 3 Phase 3 wire, 1 phase
• Wide operating range of 80 to 300 V AC/DC auxiliary supply in 4110 series
• Suitable for 50/60 Hz

Simple kWh parameter monitoring can be achievedwith the WL4000 or WC4000 series. The meter offers site selectivity of kWh or kVAh in addition to site selectivity for kWh or kVA or W or PF thus making it easier for inventory management.

Parameters:Site selectable kWh / kVA / PF / W, Old energy

Salient features

• Accuracy Class 1 as per IEC 62053-21 and Class 0.5 as per IEC 62053-22
• True RMS measurement
• Simultaneous sampling of Volts & Amps
• Positive energy accumulation even with CT polarity reversal, reverse lock programmable
• User programmable password protection
• Auto scrolling
• Auto-scaling of Kilo, Mega, Giga values
• Low PT, CT burden
• Programmable PT, CT ratio
• Site selectable for 3 Phase 4 wire, 3 Phase 3 wire, 1 phase
• Old register to store the previously cleared energy value
• Wide operating range of 80 to 300 V AC/DC auxiliary supply

The electromechanical counter meter 4030 series with typical application in DG set panels is used for tamper proof requirements.

Parameter:kWh

Salient features

• Class 1 accuracy as per IS13779
• Active energy measurement
• Rugged product for control panels to measure active energy
• 3 phase 4 wire configuration
• Stepper motor counter display
• Energy pulse LED output
• Terminal covers with sealing provision
• Meter records correct energy irrespective of current direction
• Meter records correct energy under balance & unbalance condition with any phase sequence
• Ideal product for DG set panels.

For energy monitoring of loads in distribution boards. These are primarily used for sub metering purposes.

Parameters:1 Phase -Voltage, Current, kW, kWh, 3 Phase -Voltage, Current, kW, kWh + PF, kVA, kVAr, MD

Salient features:

• Accuracy Class 1 as per IEC 62053-21
• LCD display for clear display of parameter values
• Whole current operated. 5-40A for Single Phase and 10-60A for Three Phase
• Displays Push-to-Push consumption, Daily, Weekly, Monthly consumption
• Push button for parameter scrolling
• Terminal covers to avoid direct contact of the supply terminals along with sealing provision
• Energy recording at low currents
• Pulse output LED available
• Reverse current indication for three phase
• Compact size and easy mounting
• Additional RS485 module for communication over RS485modbusRTU protocol

The single dual source meter (4040 series) offers energy monitoring of Electricity Board (EB) and DG sets.

Parameters:V, A, F, kW, KVA, PF, On hours, kWh (EB and DG)

Salient features

• Accuracy class 1 as per IEC 62053-21 & class 0.5 as per 62053-22
• True RMS measurement
• Separate registers for EB and DG energy
• Automatic switching of display based on input source as EB or DG through DG sensing input
• Positive energy accumulation / reverse lock programmable
• Old register to store the previously cleared energy values
• User programmable password protection
• Auto-scaling of Kilo, Mega, Giga values
• Energy pulse LED available
• Site selectable for 3 Phase 4 wire, 3 Phase 3 wire, 1 Phase
• Optional RS485 port communication

WL4400, WC4400 in single line display and WL4405 in 3 line display are entry level multifunction meters designed to offer basic, power and energy parameters.

Parameters:V, A, F, PF, kW, kVA, Old energy, On hours, site selectable kWh/ kVAh

Salient features

• Accuracy Class 1 as per IEC 62053-21 and Class 0.5, 0.5S as per IEC 62053-22
• True RMS measurement
• Expert in Load monitoring
• Password protection provision for security
• Site selectable for 3 Phase 4 wire, 3 Phase 3 wire, 1 Phase
• Auto scrolling and freeze mode for constant single page viewing available
• Terminals with sealing provision (optional)

Multifunction meters offer all basic, energy and power parameters along with power quality parameters of THD and k factor.

Parameters:

• 4410 series:V, A, F, PF, kW, kVA, kVAR, kWh, kVAh, kVARh, Runhours, On hours, Phase angle, Interrupts, THD, Events (High-Low), Neutral Current, k factor
• 4420 series:All parameters of 4410 series plus Maximum Demand (kW & kVA)
• 4430 series:All parameters of Model 4420 series plus Bi-directional (Import-Export)
• 4440 series:All parameters of 4410 series plus Maximum Demand with Real Time Clock (RTC) and Events (high-low) with time stamp

Salient features

• Accuracy Class 1 as per IEC 62053-21 and Class 0.5, 0.5S, 0.2, 0.2S as per IEC 62053-22
• True RMS measurement
• Expert in Load monitoring
• Password protection provision for security
• Phase wise Voltage & Current wave forms in LCD meter
• Site selectable for 3 Phase 4 wire, 3 Phase 3 wire, 1 Phase
• Maximum Demand measurement with Real Time Clock in 4440, 5000 & 5010 series
• Auto scrolling and freeze mode for constant single page viewing available
• Terminals with sealing provision (optional)
• Direct access key for Basic parameters, Power and Energy parameters
• MyFavouritescreen option for user selectable parameters in LCD series

These are high end multi-functionmeters with individual harmonics and datalog.

Parameters:

5000 series:

• V, A, F, kW, KVA, kVAr, kWh, kVAh, kVArh, PF, Runhr, Onhr, Interupts, Phase angle, THD, Neutral current, Max Demand (with RTC) , k factor
• Bi-directional (Import-Export)
• Events (high-low) with time stamp
• Individual Harmonics upto 31st.
• Datalog of 8MB

5010 series:

• V, A, F, kW, KVA, kVAr, kWh, kVAh, kVArh, PF, Runhr, Onhr, Interupts, Phase angle, THD, Neutral current, Max Demand (with RTC), k factor
• Bi-directional (Import-Export)
• Events (high-low) with time stamp
• Individual Harmonics up to 31st

Salient features

• Accuracy Class 1 as per IEC 62053-21 and Class 0.5, 0.5S, 0.2, 0.2S as per IEC 62053-22
• True RMS measurement
• Expert in Load monitoring
• Password protection provision for security
• THD for Voltage and Current (31st Individual harmonics in 5000 series)
• Phase wise Voltage & Current wave forms in LCD meter
• Site selectable for 3 Phase 4 wire, 3 Phase 3 wire, 1 Phase
• Maximum Demand measurement with Real Time Clock in 4440, 5000 & 5010 series
• Analog output can be independently programmed for 0-20 / 4-20 mA configurable for
• VLL, A, F, W, PF, VA.
• Data logging provision is available in 5000 series
• Auto scrolling and freeze mode for constant single page viewing available
• Terminals with sealing provision (optional)
• Direct access key for Basic parameters, Power and Energy parameters
• MyFavouritescreen option for user selectable parameters in LCD series

This single phase meter designed for DT metering offers higher accuracy and better features to suit the customers requirements.

• Class 0.5s accuracy for active and class1.0 accuracy for reactive as per IS & IEC standards
• CT operated meter with 5A (Ib) to 10A (Imax)
• Pulse LED output
• Indication for power on, current reversal, earth load tamper (ELT) and neutral missing
  
• Load Survey, reset backups and TOD features
• Optical port

• 174 H X 141 B X 85 D mm

This compact EM101+ single phase meter fits snugly into any meter box. The bright back-lit display ensures ease of reading.

• Class 1 accuracy as per IS and IEC standards
• Forward energy recording irrespective of current direction
• Indication for power on, current reversal and ELT
• Reset backups
• Multi-tariff / Time of the Day metering
• High surge withstand capability
• Load Survey (Interval Data)
• Anti-tamper features
• Optical port/RS 232 port/Low Power Radio (optional)

• 174 H x 141 B x 74 D mm

The superiority of the EM301 3Phase kWh meter lies in its ability to work normally under reverse current, unbalance voltage and current, reversed phase sequence and voltage variation.

• Class 1 accuracy
• LEDs indicating presence of each phase
• Withstands 440V between phase and neutral
• Maintains accuracy under current reversal conditions
• High surge withstand capability up to 8kV
• Polycarbonate enclosure
• Anti-tamper features

• 172 H X 180.5 B X 76 D mm (For 5-20 A and 10-40 A models)
• 327 H X 187 B X 104 D mm (For 5-10 A, 10-60 A and 50-100 A models)

ER300P is a tri-vector meter which integrates several functions and replaces various equipment for metering energy parameters. This meter is used for commercial metering and for metering of small industrial loads.
The meter has advanced data recording capabilities.

• Class 1.0 accuracy as per relevant IS and IEC Standards
• 10-40, 10-60, 20-100 A current rating
• Upto 3 Maximum Demand registers
• Multi-tariff / Time of the Day metering
• Load Survey (Interval Data)
• Upto 12 Reset Backups
• Anti-tamper features
• Self-diagnostic capability
• Optical port/RS 232/RS 485/Low Power Radio (optional)

• 327 H x 187 B x 120 D mm

This meter is designed for metering of HT/LT consumers and for feeders. The meter has advanced data and tamper recording capabilities and is provided with communication ports.
Software is available for data collection, load survey analysis and energy management applications. The meter can be interfaced to a variety of communication devices.

• Class 0.2s, 0.5s, 1.0 as per relevant IS and IEC Standards
• 1A and 5A current rating
• 3 Phase 4 Wire/3 Phase 3 Wire system
• Anti-tamper features
• Self-diagnostic capability
• Multiple tariff feature
• Upto 3 Maximum Demand registers
• Load Survey features
• Upto 12 reset backups
• Optical port/RS 232/RS485 (optional)

• 327 H x 187 B x 104 D mm

This meter is designed for metering of distribution transformers via a set of external CTs. The meter has advanced data and tamper recording capabilities and is provided with communication ports.
Software is available for data collection, load survey analysis and energy management applications. The data can also be used to perform energy accounting and energy audit functions. This meter can be interfaced to a variety of communication devices.

• Class 0.2s, 0.5s, 1.0 as per relevant IS and IEC Standards
• 1A and 5A current rating
• 3 Phase 4 Wire/3 Phase 3 Wire system
• Anti-tamper features
• Self-diagnostic capability
• Multiple tariff feature
• Upto 3 Maximum Demand registers
• Load Survey features
• Upto 12 reset backups
• Optical port/RS 232/RS485 (optional)

• 327 H x 187 B x 104 D mm