EM524021 is a 3-phase 4-wire STS compliant meter which also comply with DLMS/COSEM protocol.
It support IR, RS485,Plug-in and Play GPRS-2/3/4G communication. RF (Radio Frequency) communication
between MCU and IHD( in-home display). The main features are:
The Standard Transfer Specification (STS) describes a secure message system for carrying information between a point-of-sale
and a meter, and is currently finding wide application in electricity metering and payment systems. STS is not limited to this
application (see the section: Future enhancements), but because of the wide interest in this area, this document describes
the electricity application. STS is an international industry standard described in IEC62055-41, -51 and -52.
The STS prepayment solution is all about billing income security. It keeps track of the consumer's credit balance and ensures
that no power consumption can occur without having been paid for in advance.
10(100A), 3*230V Directional Connected
Active & Reactive Measurement, Cl1.0, Reactive Cl2.0
IR,RS485,Plug in& Play-2G/3G/4G (DLMS Protocol)
RF Communication (MCU & IHD)
Support LCD, Keypad,MD, Anti-tamper, Multi-tariff
High-energy Advanced series E2
High surge current ratings up to 10 kA
Wide operating voltage range 130 … 1000 V RMS
With an internal Bipolar bi-stable latching relay load switch. Standard grade: UC2 (IEC62055-31).
a latch status LED indicator
Standard
SANS 1524 -1: electricity payment system
IEC62052 - 11: Electricity metering equipment ,(AC) - General requirements, tests and test conditions Part 11: Metering equipment
IEC62053 - 21: Electricity metering equipment (a.c.) Part 21: Static meters for active energy (classes 1 and 2)
IEC62055 - 31: Electricity metering - Payment systems
Part 31: Particular requirements - Static payment meters for active energy (classes 1 and 2)
IEC62055 - 41: Electricity metering - Payment systems
Part 41: Standard transfer specification
(STS) - Application layer protocol for one-way token carrier systems
IEC62056 - 21: Electricity metering - Data exchange
for meter reading, tariff and load control,Part 21: Direct local data exchange
ISO 14001: Environmental Management Systems
ISO 9001: Quality Management System
Type Test:
Tests to be conducted as per the relevant standards: IEC 62052-11; IEC 61000-4 etc. shall include but not limited to the following
Electrical Requirements
Influence of supply voltage
Voltage range
Voltage dips and short interruptions
Heating
Insulation
General test conditions
Impulse voltage test
Immunity to earth fault
Electromagnetic compatibility (EMC)
General test conditions
Test of immunity to electrostatic discharges
Test of immunity to electromagnetic RF fields
Test of immunity to conducted disturbances, induced by radio-frequency fields
Damped oscillatory waves immunity test
Radio interference suppression
Fast transient burst test: 5/50nS pulse I
Test of immunity to electromagnetic HF field
Surge Immunity Test: 1.2/50 uS with peak voltage and current of 10kV/10kA.
AC voltage insulation test
Short Time Currents i.e. a short to be applied at the load side of the Meter Overcurrent value: 30Imax for 10ms
Climatic influence,
Dry Heat Test ,
Damp heat cyclic test,
Cold Test
Accuracy requirements
Insulation Properties
| Type |
EM524021 3P4W STS IR RS485 GPRS RF Suspension Meter with In-home Display |
| Ref. Voltage |
3*230VAC |
| Ref.Current |
10(100)A |
| Impulse Constant |
800imp/kWh,800imp/kvarh |
| LCD Display |
Backlight Display |
| Min. Starting Current |
Class 1: 40mA
Class 2: 50mA |
| Frequency Band |
50Hz |
| Accuracy Class |
Active Cl1.0, Reactive Cl2.0 |
| Function |
Multi-tariff, Max Demand, Load Control,Alarming |
| Ref. Standard |
IEC62052-11,IEC62053-21,IEC62056-46,
IEC62056-61,IEC62053-61 |
| Anti-tamper |
Top-cover Open, Terminal-cover Open,
Communication Module Cover Open, Anti-magnetic field |
Cautions:
1.About AC/DC Energy Meter
(1) AC or DC- Generally speaking alternating current or direct current shall be the first factor.
(2) We also have DC meter when you need to measure the Direct Current.
2.About Function
(1) As the content is limited, all functions mentioned above are the main functions
(2) Other functions such as TOU, load control, friendly hours,RTC, plz refer to the technical specification or contact with our sales team.
3.About Application
(1) The applications only for examples, for the pratical situation the energy meter can also be used for other applications.
(2) Welcome to inquiry if you are not sure about the functions or application, we have free technical support.
Audited Supplier 
EM524021 is a 3-phase 4-wire STS compliant meter which also comply with DLMS/COSEM protocol.
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