HomeProductsSmart MeteringE433 Three-phase CTPT Smart Energy Meter
Electricity Meters

E433 Three-phase CTPT Smart Energy Meter

E433 family CTPT-operated smart meters adopt large-scale integrated circuit, digital sampling and SMT technology. With configurable external current transformers (CT), it supports primary current up to 400A (and higher upon CT selection). It delivers robust metering solution for utility revenue protection, line-loss reduction and industrial & commercial large-load metering scenarios.

Version
Enquire About This Product
01 / PRODUCT FEATURES

Product at a glance

Measurement

  • Active and Reactive Energy
  • Import and Export Energy
  • Absolute and Algebra Active Energy
  • Independent four quadrants Reactive Energy
  • Import and Export Apparent Energy
  • Import and Export Active /Apparent Energy per phase
  • Supports wide primary current range via configurable external CT, for billing up to 3000A; internal monitoring up to 6000A.
  • On-site configurable CT/VT ratio via meter keypad or remote communication

Multi TOU Tariff (Optional)

  • Up to 4 TOU tariffs
  • Up to 10 switch-time tables and 8 day-tables
  • Up to 12 week-tables and 12 season-tables
  • Up to 50 holiday-tables

Max-Demand

  • Block and Slide demand mode
  • Active/reactive maximum demand
  • Record 13 months Maximum Demand (KW,KVAR)

LCD Display

  • Large display with 10x5mm size and eight digits
  • OBIS code and functional icon, easy to read
  • Up to 9 digits number (7+2, 8+1, 9+0)
  • Wide viewing angle
  • Highlighting Backlight

Prepaid (Optional)

  • STS and CTS standards
  • Prepaid and Post-paid switchover
  • Local and remote top-up
  • LED lights and buzzers for low balance alarms
  • Emergency credit and user-friendly mode

Load Control

  • Multi control mode
  • Local and remote load control
  • Disconnection scheme can be configurable
  • Relay status indicator
  • Relay malfunction self-check

Load Profile (Optional)

  • Up to 4 MB of Non-volatile memory
  • Up to 6 channels profiles
  • Up to total 100 days records
  • Capture period and members can be configurable

Communication Ports

  • Up to 3 independent communication ports
  • Optic ports for local communication
  • Plug-and-play modems for remote communication: GPRS / 3G / 4G / Ethernet / NB-IoT / PLC / RF / LoRa ... (optional)
  • MBUS/PLC/RF for communication with CIU

Anti Tamper

  • Up to 6 sealing positions
  • Terminal cover, meter cover and module cover sealing
  • Manual reset button sealing
  • Self-protection under Over load control, Abnormal voltage control, Arrearage control, Tamper control, Malfunction control, Fire disaster control etc.

Communication Protocol

  • International open protocol
  • IEC62056-21 E mode DLMS
  • HDLC DLMS and TCP-IP DLMS

CIU/UIU (optional)

  • User-friendly keyboard
  • LCD display with backlight
  • MBUS/PLC/RF communication
  • LED/LCD/buzzer alarm
  • Removable backplate for easy installation

Firmware Upgrade

  • Firmware upgrade
  • Remote and local upgrades
  • Fast and stable solutions

Billing Record

  • Up to 13 month billing data
  • Calculate monthly net consumption of energy
  • Up to 31 days daily data
  • Calculate daily net consumption of energy

Alarm

  • Alarms with LED and LCD
  • Alarm can be configurable

Event Record

  • Up to 100 standard event records with occurred date and time: low battery, clock sync, clock malfunction, NV memory malfunction, watchdog reset, meter malfunction, MD reset, high temperature, firmware upgrade etc.
  • Up to 225 tamper event records with occurred date and time: meter cover open, terminal cover open, module cover open, strong magnetic interference, unauthorized login, parameter configuration etc.
  • Up to 100 control event records with occurred date and time: disconnect the breaker, connect the breaker, breaker control failure etc.
  • Up to 225 power grid event records with occurred date and time: power on, power off, under voltage, over voltage, over current, over load, current polarity reversal, missing potential, earth fault, voltage imbalance, voltage loss, voltage THD, current THD, power imbalance, reverse phase sequence, phase association disturbance, current short or CT open, current bypass, low power factor, neutral disturbance etc.
  • Up to 100 voltage Sag/Swell event records with occurred date and time: L1 voltage Sag, L2 voltage Sag, L3 voltage Sag, L1 voltage Swell, L2 voltage Swell, L3 voltage Swell.
02 / SPECIFICATIONS

Technical specifications

DescriptionValue
Rated voltage
3x57.7/110V~3x240/415V
Operating voltage range
80%Un~120%Un
Meter secondary rated current & Starting Current
1(6)A; Starting current: 0.1%Ib
Max. Primary measurable current (with external CT)
Up to 3000A for billing application; up to 6000A for sub-monitoring only (depends on matched external CT)
Rated frequency
50Hz
Pulse Constant
10000imp/kWh
10000imp/kvarh
Accuracy Class
Cl.0.5S for Active
Cl.1 for Reactive
Power Consumption
Voltage circuit < 1W or 5VA, Current circuit < 0.2VA
Battery and Life
Replaceable Lithium battery, life more than 15 years
Tropical working temperature
-40℃ to +70℃, Humidity is up to 95%
EMC Performance
Impulse voltage > 8kV, AC voltage > 4kV, Short circuit current > 3kA, Electrostatic Discharge > 8kV&15kV etc.
Protection class
IP54 comply with IEC60529
Insulation grade II
Housing material
Polycarbonate with non-conductive, high impact, smooth finish, durable, non-flammable, UV stabilized, UV resistant and high resistance to weathering
Dimension
Meter: 294mmX170mmX81mm

Note 1: For billing & trade metering, recommended max primary current is up to 3000A with matched CT. Application above 3000A is only for internal energy monitoring purpose, not for revenue billing.

Note 2: Meter itself only accepts CT secondary input 1A or 5A. Corresponding CT & PT ratio must be programmed inside meter. CT is not included in meter supply scope.

CT selection tip

For 400A application:

  1. Meter CT secondary input: 1A or 5A; 400/5A CT is preferred for 400A primary load. For long wiring distance, select 400/1A CT.
  2. CT accuracy class: 0.5S or better for billing & trade metering.
  3. CT rated burden ≥2.5VA (recommended 5VA for field margin).
  4. CT secondary terminals S1/S2 shall never be open-circuited during operation; S2 terminal grounding is required.
  5. Program corresponding CT ratio inside E433 meter after installation.

For primary current above 1500A:

  1. Prefer CT secondary 1A instead of 5A for long wiring runs to reduce burden loss.
  2. Ensure actual load current maintains above 30% of CT primary rated current for good accuracy performance.
  3. Above 3000A: Only for internal sub-monitoring; NOT for trade/billing revenue metering.
03 / CERTIFICATIONS

Product certifications

LET’S TALK ABOUT YOUR REQUIREMENTS

Interested in E433 Three-phase CTPT Smart Energy Meter?

Contact our team for product availability, specifications and technical documentation.

Contact Our Team