STS Prepaid KWH Meter 1 Phase Digital Electric Meter for Utility Companies Operates normally at an ultra-low voltage of 50V

• Model: STE18-B
• Product Category: STS Prepaid Single-Phase Keypad-Type Electricity Meter
• Core Purpose: Measures single-phase active energy in low-voltage networks, as well as voltage, current, power, etc.
• 2. Compliance & Quality Standards
• Complies with international standards: IEC62052-11, IEC62053-21/23, IEC62055-31
• Certified by STS ASSOCIATION
• Manufactured in accordance with ISO9001 and ISO14001 standards
• Protection Class: Class II (electromagnetic compatibility)

3. Key Functional Features

• STS Token Recharge: Supports recharge via 20-digit token
• Neutral Current Measurement
• Credit Alarming: Alerts for low credit
• Tamper Detection & Cover Opening Detection
• Real-time Clock
• Bidirectional Metering
• Remote Reading (with optional RF communication module)
• Multi Tariff Support: Up to 8 time-of-use (TOU) tariffs
• Automatic Switch-off: Triggers when credit is exhausted
• Event Log: Records operational events
• Low-voltage Operation Adaptability
• Data Security: Protected by Microsoft SQL Server backend database and account permission management

4. Technical Parameters

• Nominal Voltage: 230V
• Working Voltage Range: 30%~120%Un
• Nominal Frequency: 50-60Hz
• Basic Current (Ib): 5A
• Maximum Current (Imax): 80A
• Starting Current (Ist): 20mA
• Active Energy Constant: 1000 imp/kWh
• Measurement Accuracy: Class 1.0
• Power Consumption: Voltage circuit <2W <8VA; Current circuit <1VA
• Operation Temperature Range: -25℃~70℃
• Storage Temperature Range: -40℃~85℃
• Electromagnetic Compatibility (EMC):
  • AC Insulation Strength: 4kV at 50Hz for 1min
  • Impulse Voltage (1.2/50μs): 8kV (mains connections)
  • Electrostatic Discharges: 8kV (contact discharge), 16kV (air discharge)
  • Electromagnetic RF Field: 10V/m (27MHz-500MHz), 30V/m (100KHz-1GHz)
  • Fast Transient Burst Test: 4kV

5. Product Details & Design

• 8-Year Battery Life
• LCD Display: Shows energy consumption, credit, and other key data
• Protection Rating: IP54 (dustproof and water-splash resistant)
• Flame-Retardant Thickened Shell: Ensures stability, durability, and safety
• Transparent Protective Cover
• Keypad Operation: For token input and function control
• Infrared Communication Support
• Easy Installation: Fixed triangular positions and hanging hole design on the back

6. Application Scenarios

• Residential: Households, apartments, rental houses
• Commercial: Small offices, studios, clothing stores, stationery stores, snack shops, coffee shops, convenience stores, supermarkets
• Institutional: Schools, small office spaces

7. Vending & Recharge System

System Functions:

• Data Management: Covers meters, prices, customers, regions, sales stations, and accounts (supports creation, editing, deletion, query, Excel import/export)
• Recharge Service: Two methods (by amount/unit); generates token receipt after recharge
• Report Generation: Produces receipt reports, monthly summaries, customer payment reports, etc.
• Account Management: Password modification, sub-account creation, and permission assignment
• API Support: Facilitates function expansion for personalized business needs
• Compatibility: Adapts to electric, water, and gas meters

Recharge Processes:

• On-site Recharge: At nearby recharge points via STRON Vending System
• Mobile Recharge: Through third-party platforms (M-PESA, Alipay, MTN, Airtel, etc.) via API integration
• Door-to-Door Recharge: Via mobile vending units at meter installation sites