GOSSEN METRAWATT U281C Single Phase Digital Energy Meters Instruction Manual

: June 12, 2024
: GOSSEN METRAWATT

Table of Contents

GOSSEN METRAWATT U281C Single Phase Digital Energy Meters
Product Usage Instructions
Front View
- Power factor
Dimension
Sealable terminal covers
Wiring diagram
MID Certification
Safety Instructions
Technical Data
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

GOSSEN METRAWATT U281C Single Phase Digital Energy Meters

Product Information

The METRALINE I ENERGY is a single-phase digital energy meter with built-in M-Bus communication. It is designed for direct connection up to 40 A and is MID (Measurement Instruments Directive) certified.

Key Features:

4 quadrants single phase active energy meter
Direct connected
0.02 to 40 A current range
1 tariff
4 kV isolated M-Bus inbuilt

Product Usage Instructions

Before installation, make sure to follow these safety precautions:

This device must be installed and maintained ONLY by qualified and duly authorized personnel.
During installation, ensure that there is no voltage applied.

To use the METRALINE I ENERGY, follow these steps:

Ensure that the device is installed by qualified personnel according to the provided user manual.
Make sure there is no voltage applied during installation.
Connect the device to the power source using the appropriate cables and connectors.
Once connected, the device will display various parameters on the front panel, including:
- Wirkenergiebezug (Active energy consumption in kWh)
- Wirkenergieabgabe (Active energy generation in kWh)
- Bezug-und abgegebene Wirkleistung (Active power consumption and generation in W)
- Spannung (Voltage in V)
- Strom (Current in A)
- Frequenz (Frequency in Hz)
Use the provided LCD display to view the measured parameters.
Refer to the user manual for additional information on interpreting and using the displayed data.

Note: It is important to follow all safety guidelines and instructions provided in the user manual to ensure proper and safe usage of the METRALINE I ENERGY.

233-447-128-15METRALINE I ENERGY

Single-phase Digital Energy-meters Direct Connected up to 40 A with M-Bus inbuilt

Operating instructions4 quadrants single phase active energy meter, direct connected, 0.02 to 40 A, 1 tariff, with 4 kV isolated M-Bus inbuilt

RISK OF ELECTRIC SHOCK, BURNS OR EXPLOSION This device must be installed and maintained ONLY by qualified and duly authorized personnel. During its installation, be sure there is no voltage applied.

Front View

Command Button
( ) imported symbol (for Energy or Power)
7 digit LCD, for Energy and instantaneous values visualization)
( ) exported symbol (for Energy or Power)
Metrological LED (5000 pulses per kWh)

Menu Pages

The main page is shown at the meter power on, and whenever “Command Button” is not pushed for 20 seconds. This page automatically displays the energy counter which is increasing at that moment; on the top line, the direction of the energy is shown
( imported, exported).
By pushing the “Command Button”, the following pages will appear (rotating):
The Active energy that is currently increasing, or the Active energy that has increased more recently (Imported or Exported)
The alternative Active energy (Exported or Imported)
The instantaneous Power value (imported or Exported)
The Line Voltage
The Line Current
The Line Frequency
The Power Factor
The M-Bus Primary Address
The M-Bus Baudrate
(*) required by MID normative
The Firmware Release (*)
The Firmware Checksum (*)
The Display test Page (*)

Power factor

Convention according to IEC 62053-23

Dimension

Sealable terminal covers

Applications

Please read this important information!

Intended Use / Use for Intended Purpose
The instrument is a digital multifunctional energy meter certified in accordance with MID. Integrated 4-quadrant measurement permits measurement of energy import and export.
Thanks to MID certification, acquired data (display) can also be used for the purpose of billing energy costs to third parties.
Via integrated communication interfaces, the values are also forwarded to superordi- nate management systems. Protection against tampering is provided through ade- quate measures (tamper-proof cover).
Safety of the operator, as well as that of the instrument, is only assured when it’s used for its intended purpose

Use for Other than Intended Purpose
Using the instrument for any purposes other than those described in the product do- cumentation is contrary to use for intended purpose.

Liability and Guarantee
Gossen Metrawatt GmbH assumes no liability for property damage, personal injury or consequential damage resulting from improper or incorrect use of the product, in particular due to failure to observe the product documentation. Furthermore, all guaran- tee claims are rendered null and void in such cases.
Nor does Gossen Metrawatt GmbH accept any liability for data loss.

Scope of Delivery

1 instrument (U281C)
1 operating instructions

Wiring diagram

Cable stripping length and max. terminal screw torque

MID Certification

Safety Instructions

Read and follow these instructions carefully and completely in order to en- sure safe and proper use. Keep for future reference.

DANGER

Electric shock due to live components! Life endangering due to electric arcs!

Touching voltage conducting components is life endangering!

The installation and any work performed on the instrument may only be carried out by a qualified electrician.
Observe and comply with all safety regulations which are applicable for your work environment.
Wear suitable and appropriate personal protective equipment (PPE) whenever wor-king with the instrument.
During installation, the installation environment must be voltage-free. For that, ob-serve the five safety rules in accordance with DIN VDE 0105-100.

ATTENTION – EN 50470-3 Faulty installation & incorrect operation Faulty installation/incorrect operation can damage your instrument/system.
Risk of malfunctions and disruptions

Comply with the specified technical data and conditions
Do not install the instrument in potentially explosive atmospheres.
Do not install the instrument in locations where it may be exposed to direct sunlight.
Install and operate the instrument only if it and all connection cables and leads are in good working order and damage-free. Inspect the instrument at regular intervals.
If the instrument doesn’t function flawlessly, permanently remove it from operation and secure it against inadvertent use.

Symbols on the Instrument

European conformity marking

Double insulation (protection category II)

CE and metrology mark with indication of year (M22) and registration number of the notified body for module D, country-specific calibration validity period

Standards, Regulations and Directives

DIN 43880
EN 50470-1
EN 50470-3
EN 60715
IEC 62053-23

Transport & Storage

Transport and store the instrument only within the limits of permissible ambient con-ditions. Also use suitable packaging in order to ensure adequate protection against en-vironmental influences and mechanical stress.

Maintenance
The instrument is maintenance-free. Keep outside surfaces clean. Clean the instrument only with a dry cloth.

Recalibration

Comply with national recalibration regulations and laws. The calibration period in Ger-many is 8 years.
A broken manufacturer’s seal means equals invalidated calibration. The instrument must not be used for billing purposes.

Repairs & Manufacturer’s Guarantee

If your instrument requires repair, please contact our service department; see Support & Contact.
Unauthorized modification of the instrument is prohibited. This also includes opening the meter.
If it can be ascertained that the instrument has been opened by unauthorized per-sonnel, no guarantee claims can be honored by the manufacturer with regard to per-sonal safety, measuring accuracy, compliance with applicable safety measures or any consequential damages. If the manufacturer’s seal is damaged or removed, all gua-rantee claims are rendered null and void.
The instruments are guaranteed for a period of 2 years after shipment. The manufac-turer’s guarantee covers materials and workmanship. Damage resulting from use for any other than the intended purpose or operating errors, as well as any and all con sequential damage, are excluded.

Disposal & Environmental Protection

The following comments refer specifically to the legal situation in the Federal Republic of Germany. Owners or end users who are subject to other national requirements are required to comply with the respectively applicable national requirements and to imple-ment them correctly on site
The symbol on the left depicting a crossed-out garbage can on wheels refers to the legal obligation of the owner or end user (Ger-man electrical and electronic equipment act ElektroG and German battery act BattG) not to dispose of used electrical equipment and batteries with unsorted municipal waste (“household trash”).
Old devices, electrical or electronic accessories and waste batte-ries (including rechargeable batteries) used in Germany can be returned free of charge to Gossen Metrawatt GmbH or the service provider responsible for their disposal. Further information can be found on our website.

Technical Data

Data in compliance with EN 50470-1, EN 50470-3| | | direct connection 40 A

built-in communication M-Bus

---|---|---|---
General characteristics

• Housing DIN 43880

|

DIN

| |

1 Module

• Mounting EN 60715| 35 mm| | DIN rail
•Depth| mm| | 70
• Weight| g| | 60
Operating features

• Connection DIN 43880

|

n° wires

| |

2

• Storage of energy values and config. Internal flash memory| –| | yes
Approval (according to EN 50470-1, EN 50470-3)

• Reference Voltage Un

|

VAC

| |

230

• Reference Current (Iref)| A| | 5
• Minimum Current (Imin)| A| | 0.25
• Maximum Current (Imax)| A| | 40
• Starting Current (Ist)| A| | 0.02
• Reference Frequency (fn)| Hz| | 50
• Number of phases (number of wires)| –| | 1 (2)
• Certified Measures| kWh| | kWh T1, kWh T1
• Accuracy Active Energies (accor. to EN 50470-3) and Active Powers| class| | B
Supply Voltage and Power Consumption

• Operating Supply Voltage range

|

V

| |

184 … 276

• Maximum Power Dissipation (Voltage circuit)| VA (W)| | ⩽2 (1)
• Maximum VA burden (Current circuit) @ Imax| VA| | ⩽1
• Voltage Input Waveform| –| | AC
• Voltage impedance| MΩ| | 1
• Current impedance| mΩ| | ⩽20
Overload capability

• Voltage

|

continuous

|

VAC

| |

276

• Voltage range

|

VAC

| |

184 … 276

• Current range| A| | 0.02 … 40
• Frequency range| Hz| | 45 … 65
• Measured Quantities| –| | kWh, kW, V. A, PF, Hz
Display features

• Display type

|

LCD backlightet

|

–

| |

7 (2 Decimal)

Energy digits dimension| mm| | 6 x 3
• Active Energy                                                          5 digits + 2 decimal digits| min….. max. kWh| | 0.01 … 99999.99
• Active Power                                                           4 digits digits with sign| W| | 0 … 11040
• Voltage                                                                   3 digits + 1 decimal digits| V| | 184.0 … 276.0
• Current                                                                   2 digits + 2 decimal digits| A| | 0.00 … 40.00
• Power factor                                                           1 digits + 3 dec. digits + capac./induc. indic.| –| | -1.00 … +1.00
• Frequency                                                               2 digits + 2 decimal digits| Hz| | 45.00 … 65.00
• Display refresh period| s| | 1
Optical metrological LED

• Front mounted red LED (meter constant) proportional to active imp/exp Energy

|

p/kWh

| |

5000

Safety

• Protective class

|

class

| |

II

• Baud rateadjustable

|

–

| |

300-600-1200-2400-4800-9600

• Screwdriver for mains terminals head with Z +/-

|

POZIDRIV

| |

PZ1

• Screwdriver for mains terminals Modbus                   head with Z +/-| POZIDRIV| | PZ1
• Terminal capacity main current paths                        stranded wire with sleeve min. (max)| mm 2| | 0 (16)
• Terminal capacity for mains terminals Modbus           stranded wire with sleeve min. (max)| mm 2| | 0 (4)
Environmental conditions (storage)

• Temperature range

|

°C

| |

-25 … +70

Environmental conditions (operating)

• Temperature range

|

°C

| |

-25 … +55

Support and Contact

Please contact us at
+49 911 8602-0
Monday – Thursday: 08:00 Uhr – 16:00 Uhr
Friday: 08:00 Uhr – 14:00 Uhr
support.industrie@gossenmetrawatt.com

Please contact GMC-I Service GmbH for repairs, replacement parts and calibration: +49 911 817718-0
service@gossenmetrawatt.com
www.gmci-service.com

CE Declaration
The device fulfills all requirements of applicable EU directives and national regulations. We confirm this with the CE mark.
The CE declaration is available on our website: https://www.gmc- instruments.de/en/services/download-center/download-center/

Gossen Metrawatt GmbH
Südwestpark 15 • 90449 Nürnberg • Germany
Phone +49 911 8602-0 • Fax +49 911 8602-669
E-mail info@gossenmetrawatt.com
www.gossenmetrawatt.com