EM920

Hybrid ANSI Revenue Meter
& Power Quality Analyzer

The EM920 is the ANSI version of the eXpertMeter^TMSeries of multifunctional power analyzers. This series was designed to deliver two functionalities that are present in every substation, in a single device:

PQ Analyzer & Power Meter, typically required by utility SCADA teams
Revenue Meter, typically operated and read by the utility billing department

Combining these functions simplifies design and eliminates redundancy.

Revenue Meter:

Class 0.2 per ANSI C12.20
Anti-tamper revenue grade design
5A or 1A current inputs

Power Quality Analyzer

PQ monitoring per IEC 61000-4-30 Class A requirements
IEEE 1159 statistics and reports
Waveform capture and transient recording at 1024 samples per cycle

Transformer and transmission line losses calculation

Communication

IEC 61850
Built-in: RS485/232 / IR / IRIG-B
Optional ports: ETH; 2G/3G; USB
Open protocol: Modbus RTU; DNP3.0

Digital & Analog I/O: up to 8 I/O

Backup Battery: up to 6 hours of full operation. Rechargeable

Transformer/Line losses calculation

Based on parameters such as copper losses and iron losses, this unique economical feature enables the meter to accurately establish a virtual metering point. This eliminates the need to construct a costly high voltage metering point, requiring a metering cubicle, CT and PT.

Technical Specifications

Multi-Functional 3-Phase Power Meter

Voltage, current (including neutral current), power, energy, power factor, frequency, voltage/current unbalance
Current range up to 200% (120% for 100A model)
Ampere/Volt demand meter
25, 50, 60 and 400 Hz measurements
128 samples per cycle

Revenue Meter

Exceeds accuracy class 0.5S
Four-quadrant active and reactive energy poly-phase static meter
Three-phase total and per phase energy measurements; active, reactive and apparent energy counters
Time-of-Use, 4 totalization and tariff energy/demand registers x 8 tariffs, 4 seasons x 4 types of days, 8 tariff changes per day
One–time easy programmable tariff calendar schedule
Automatic daily energy and maximum demand profile log for total and tariff registers

Power Quality Analyzer

Power Quality Analysis according to IEC 61000-4-30 Class A
EN50160 monitoring, statistics & reports
6 hour battery back-up and/or auxiliary power supply for continuous recording of major dips & interruptions
Harmonics & Inter-harmonics per IEC 61000-4-7
Voltage and current THD, TDD and K-Factor, up to 50^th order harmonic
Voltage and current harmonic spectrum and angles
Directional power harmonics
Flicker measurement per IEC 61000-4-15
Waveform recording, up to 1024 samples/cycle*

*with transient recording module

Transient Recorder

Records fast transients overvoltages >17 microseconds
Transients measured relative to ground
Measures up to 2 kV pulses

Current Inputs

1A or 5A inputs

voltage input

Measurement and Power Supply*:

High-range power supply (207-480V option):96- 575V AC
Low range power supply (100-120V option): 45 – 250 V AC

*self-energized (SE) from voltage inputs

I/O

Built-in

2 Digital Inputs
1 KYZ Relay

modular I/O (available options):

6 Relay Outputs: 2 x Form A + 4 x Form C
8 Digital Inputs
4 Analog Outputs

(see Module tab for detailed spec)

Programmable Logical Controller

Embedded programmable controller
16 control set points; programmable thresholds and delays
½-cycle response time

Communication Interfaces

Built-in:

Standard 2-wire RS-485 serial port
IR (optical)
USB

Modular (optional):

IRIG-B
4G modem
ETH
IRIG-B
2G/3G/4G Cellular

Communication Protocols

IEC 61850
IEC 62056-21 (DLMS)
Modbus RTU
ASCII
DNP 3.0
Modbus/TCP
DNP3/TCP

Meter Security

3 levels Password security for protecting meter setups and accumulated data from unauthorized changes
anti-tamper design

Mounting

Socket-mount: ANSI C12.10 – FORM 9S/9A

Display

High contrast 4” Graphical backlit LCD display
320×240 pixel (¼ VGA)
Auto-scroll option with adjustable page exposition time; auto-return to a default page
Multilingual (English/Spanish)

Real Time Clock

Built-in clock and calendar functions
2 year battery backup
SNTP Time Synchronization

Power Supply

Available Options:

Self-energized (default):

45 – 250 V AC
96- 575V AC

Auxiliary power supply (module):

50-288V AC (0-400Hz) / 90-290V DC

Downloads

Our software packages complete our product line, offering a total solution for your power system. SATEC’s on-line service, eXpertpower, collects, archives and analyses energy and power quality data. eXpertpower allows multiple users to view data, create automated billing, produce sophisticated reports and implement energy.

EM920 Brochure

EM920 Installation Manual

EM920 Operation Manual

EM920 Installation Manual - ESP

EM920 Operation Manual - ESP

EM920 DNP

EM920 IEC 61850

EM920 IEC 62056-21

EM920 Modbus

Plug-In Modules

The EM920’s unique “Add-On” modularity is the key to its remarkable versatility and unprecedented effort to add intelligence, control and communications to electrical metering. SATEC’s “Add-On” module concept allows you to configure the meter to your changing needs, thus saving valuable time in the field or future costly replacements.

Transient Recorder

Sampling rate up to 1024 samples per cycle

Auxiliary Power Supply

50-288V AC / 90-290V DC

Communication modules

Available modules:

ETH: includes IRIG-B and additional RS-232/485
Dual ETH: 2 x ETH + IRIG-B + additional RS-232/485
2G/3G cellular
4G cellular (Verizon)

Input / Output Modules

Available modules:

6 Relay Outputs: 2 Form A + 4 Form C
8 Digital Inputs module
4 Analog Outputs module
- ±1mA
- 0-1 mA
- 0-20 mA
- 4-20 mA