Hsiang Cheng Corp. ®

Model EPM 7000 Power Quality Meter


Hsiang Cheng, EPM7000 Power Quality Meter

  • For factory and building automation
  • Modbus®RTU protocol
  • Maximum 600V
  • True RMS conversion
  • LCD display
  • Field programmable PT / CT ratio
  • Accuracy up to 0.2%
  • Memory for all setup and energy data
  • Comprehensive self test diagnostics
  • Low input burden 0.1VA (5A / 120V)
  • Wide power supply range 80~260V AC / DC
  • Compact physical configuration
  • Compatible for DIN & ANSI cut out
  • 2KV RMS input / output / power isolation
Product Description:
space EPM7000 digital power meters are an intelligent approach to traditional power metering. Each power meter is a compact, electronically advanced and easily programmable with a multi-display.They are designed to be compatible with the most widely used DIN standard panel instruments (It fits the DIN 92 x 92 mm panel cutout holes).Wiring is a breeze, you need only to connect one meter, it also uses standardized hardware suitable for either 1 phase 2 wires, 1 phase 3 wires, 3 phase 3 wire or 3 phase 4 wires networks. These high-tech power meter are highly dependable, come with an accuracy of 0.2% for voltage and current and up to 0.25%. for power measurement and long-term stability.A large LCD screen with alphanumeric readout allows the user to manually or automatically prioritize and sequentially view the more than 30 electrical parameters. This versatile power meter is equipped with a serial port (RS-485 or RS-232), to allow connection to an open architecture network. The Modbus® protocol aloows for communication to PCs or data acquisition systems . The EPM7000 software provides a simple yet practical solution to energy management in factories and plant, small industries, building services, etc.

  • Factory & Building Automation (FA & BA)The power meter was developed for factory and building automation (FA & BA) applications, more all of power and energy parameters can easily apply to wide range of AC switch-gear or industrial power distribution system for metering.
  • PLC Modbus CompatibleThe Modbus® communications protocol allows information and data to be efficiently transferred between EPM 7000 and modicon programmable logic controllers (PLC) or other third party Modbus® compatible monitoring and control system. The EPM 7000 can also establish a monitoring system by using an IPC-based centralized master display software. (The RTU mode Modbus® protocol with defaullt baud rate 9600 bps, 8 data bit.)
  • Memory for all setup and energy dataAll of the meter status settings and energy data is retained in a non-volatile memory. EPM 7000 power meter records includes measured watt-hours, PT and CT ratios, system configurations, display settings, and communication parameters.
  • Field ProgrammabilityThe field programmable power meter is able to set e.g. CT and PT ratio, Modbus® address, communication baud rate, parity, meter’s display, etc. either programming by push-bottom or by rear RS-485 / RS-232 communication port from a PC.
  • Accuracy up to 0.2%Voltage and current up to 0.2% and other power up to 0.25%.
  • Comprehensive System IntegrationThe PLC compatible RS-485 / RS-232 Modbus® communication protocol for efficient data transfer between the EPM 7000 and Modicon programmable logic controller (PLC) existing RTU Power SCADA systems and DCS systems or other Modbus protocol compatible systems.
Specifications :
Voltage : 10~600V
Current : suitable for CT secondary rating (optional)Maximum 6A for 5A ratingMaximum 1.2A for 1A rating
Triggered trace memory / fault recording range V ≤ 600VA ≤ 8 x rated
Frequency : 40 – 70Hz
Voltage: < 0.4VA at 600V< 0.04VA at 150V
Current: < 0.1VA at 5A
Overload Capacity
Voltage 750V continuous1000V 10 seconds1200V 3 seconds
Current 2 x rated continuous10 x rated 30 seconds25 x rated 2 seconds 50 x rated 1 seconds
Measured system Suitable for 3 phase 4 wires / 3 phase 3 wires / single phase 2 & 3 wires / 3 phase balanceSelect by input wiring & software configuration
Programmability: Software accessible / password lockSystem selection : 3 phase 4 wires / 3 phase 3 wires /1 phase 2 & 3 wires and 3 phase balancePT : 1 – 5000.0 ; CT : 1 – 2000.0
Readout display control 4 digits / auto scan or manual selection / scanning time
Communication Baud rate 1200 / 2400 / 4800 / 9600 / 19200Address setting 1 – 254Calibration : software with password lock Memory : all of energy date and status setting
Normal Operation 250Vac / 30Vdc, 10A resistive250Vac / PF 0.4, 6A inductive30Vdc / t=7ms, 6A inductive
Interrupting Capacity 300Vac, 10A250Vdc, resistive 0.32A maximum, t=7ms125Vdc, resistive 0.5A maximum, t=7ms
Analog Input ( AI ) Accuracy, 0.5% fs3 differential analog inputs / process variablesStandard input 4-20mA / 0-20mA Common mode voltage E100V maximum Option input 0-10V / 0-5V / 0-1V / 1-5V / 2-10V
Analog output (AO) Accuracy, 0.5% fs4 isolated analog outputsStandard output 4-20mAdc / load ≤ 500Ω Configurable Measured parameters Input range, unipolar / bipolar
Pulse Output ( PO ) 2 pulse outputs photo-isolatedConfigurableParameter , WH / VarH / VAH / AH Unit, ±1WH / ±1QH / 1VAH / 0.01AH Pulse width / 50% duty cycle
Standard output: 4-20mAdc / load < 500Ω
Configurable Measured parameters Input range, unipolar / bipolar
General Specifications
Communication ports: RS485 ( standard ) ;RS232 ( option )Modbus® RTU protocol
Display: LCD 0.4” display, 3 rows of 8 alphanumerics
RTC Maximum deviation 5 seconds in 24 hoursTime for year / month / day / hour / minute / sec
Dielectric strength: IEC 255-52KV AC rms 1 minute between input / output / power
Impulse and surge test: ANSI/IEEE C37.90.1-1989 (3KV) SWC testIEC 255-22-1 class III SWC testIEC 255-22-4 class IV (IEC 801-4) SWC test IEC 255-5 1.2 x 50us (5KV) impulse test
Stability: Temperature range -25 to +55°C, maximum 100 ppm/°CLong term stability 0.15% drift maximum per year
Operating condition: Temperature range -25 to +60°C,RH 20 – 95% non-condensed
Storage condition: Temperature range -25 to +60°C,RH 20 – 95% non-condensed
Power supply: AC 80-260V, 40-70Hz, DC 80-330VDC 20-60VDissipation maximum 12VA for AC and 6 Watts for DC
Mounting / Dimension: Panel type mountingDIN 120 x 120 x 130.5mmCut out : 92 x 92mm
pdf_pic  General Specifications