Janitza UMG 806 / UMG 806-LP Power Analyzer

1 General Information

Disclaimer

Observing the usage information for the devices is a prerequisite for safe operation and for achieving the specified performance characteristics and product features. Janitza electronics GmbH assumes no liability for personal injuries, property damage, and financial losses resulting from the failure to observe the usage information. Ensure that your information products are legible and accessible.

Further usage information, such as the user manual, can be found on our website www.janitza.com under Downloads.

Copyright notice

© 2024 - Janitza electronics GmbH - Lahnau. All rights reserved. Any duplication, processing, distribution, and any other kind of use, even in part, is prohibited.

Technical Changes Reserved

• Ensure that your device matches the installation instructions.
• First, read and understand the product's usage information.
• Keep the product's usage information accessible throughout its service life and pass it on to subsequent users if applicable.
• Refer to www.janitza.com for information concerning device revisions and associated adjustments to the usage information.

Disposal

Please observe national regulations. Dispose of individual parts according to their properties and existing country-specific regulations, e.g., as electronic waste, batteries, plastics, or metals, or commission a certified disposal company.

Relevant Laws, Applied Standards, and Directives

Refer to the Declaration of Conformity on the Janitza electronics GmbH website (www.janitza.com) for applicable laws, standards, and directives.

2 Safety

Safety Instructions

The installation instructions do not provide a complete list of all safety measures required for operating the device. Special operating conditions may necessitate additional measures. The installation instructions contain notes that must be observed for your personal safety and to prevent property damage.

Symbols Used on the Device

⚡ The additional symbol on the device itself indicates an electrical danger that can result in serious injuries or death.

⚠️ The general warning symbol draws attention to possible risks of injury. Observe all instructions listed under this symbol to prevent injuries or even death.

Safety Instructions in the Installation Manual

Safety instructions are highlighted with a warning triangle and presented as follows, depending on the degree of hazard:

• [DANGER]: Warns of an imminent danger that will result in serious or fatal injuries if not heeded.
• [WARNING]: Warns of a potentially dangerous situation that can result in serious injuries or death if not heeded.
• [CAUTION]: Warns of an imminently dangerous situation that can result in minor or moderate injuries if not heeded.
• [ATTENTION]: Warns of an imminently dangerous situation that can result in property damage or environmental damage if not heeded.
• [INFORMATION]: Points out procedures where there is no danger of personal injury or property damage.

Safety Measures

When operating electrical devices, certain parts inevitably carry dangerous voltage. Serious personal injuries or property damage can occur if not handled correctly:

• Before connecting, ground the device at the ground wire connection if available.
• Dangerous voltages may be present in all circuit parts connected to the voltage supply.
• Dangerous voltages may still be present in the device even after disconnecting the supply voltage (capacitor storage).
• Do not operate current transformers open on the secondary side, except for Low-Power (LP) current transformers with mV output (refer to the user manual).
• Do not exceed the threshold values specified in the user manual and on the rating plate. This applies during inspections and commissioning as well.
• Observe the safety and warning notices in the usage information accompanying the devices and their components.

[WARNING] Danger due to noncompliance with warning and safety instructions. Noncompliance with warnings on the device and in the usage information can lead to injury or death. Observe all safety and warning notices, including installation instructions, user manuals, and supplementary safety information.

Qualified Personnel

To prevent personal injuries and property damage, only qualified personnel with electrical engineering training and knowledge of national accident prevention regulations, safety technology standards, and the installation, commissioning, and operation of the device and its components may work on the unit.

[WARNING] Risk of injury due to electric voltage or electrical current! Touching live exposed or stripped cores or hazardous device inputs can cause serious personal injury or death. Before starting work on your system: Disconnect from power, secure against re-energization, verify disconnection, ground and short circuit, and cover or block off adjacent live parts.

Intended Use

The device is:

• Intended for installation in switch cabinets and small distribution boards. Installation position is arbitrary (refer to Section 3 "Assembly").
• Not intended for installation in vehicles. Use in mobile equipment is considered an unusual environmental condition and requires special agreement.
• Not intended for installation in environments with harmful oils, acids, gases, vapors, dust, or radiation.
• Designed as an indoor meter.

Incoming Goods Inspection

Proper transport, storage, setup, assembly, operation, and maintenance are prerequisites for trouble-free and safe operation. Unpack with care, without force, using suitable tools. Check devices and components visually for flawless mechanical condition and verify the scope of delivery (see user manual) for completeness before installation. If safe operation is no longer possible (e.g., visible damage, failure to operate despite power, exposure to unfavorable conditions or transport stress), immediately take the device out of service and secure it against unintentional startup.

3 Device Description and Assembly

Device Description

The device is a multifunctional power analyzer that measures and calculates electrical parameters such as voltage, current, frequency, power, energy, and harmonics in building installations, distributors, circuit breakers, and busbar trunking systems. It displays, saves, and transfers measurement results via interfaces.

[ATTENTION] Property damage due to noncompliance with assembly instructions. Noncompliance can damage or destroy your device. Ensure sufficient air circulation in your installation environment and cooling if necessary for high ambient temperatures. Refer to the user manual for detailed information on functions, data, and assembly.

Assembly

Mount the measurement device in switch cabinets or small distribution boards according to DIN 43880 (any installation position) on a 35 mm DIN rail as follows:

Diagram Description: Device mounted on a DIN rail, showing the bottom latch and module clip latch.

4 Connecting the Supply Voltage

Refer to the rating plate or technical data for the supply voltage level. A display should appear after connecting the supply voltage. If not, check if the supply voltage is within the rated range.

Diagram Description: Example connection of supply voltage showing L (Line), N (Neutral), a fuse, and a circuit breaker.

[ATTENTION] Property damage due to noncompliance with connection conditions or impermissible overvoltages. Noncompliance can damage or destroy your device. Before connecting:

• Ensure voltage and frequency match the rating plate and user manual limits.
• Secure the supply voltage with a UL/IEC-listed circuit breaker/fuse in the building installation.
• The disconnecting device must be easily accessible, near the device, and labeled for the respective device.
• Do not tap the supply voltage at the voltage transformers.
• Provide a fuse for the neutral conductor if the source's neutral conductor connection is not grounded.

[WARNING] Damage to the device or installation, potentially life-threatening, due to short circuits from insufficient insulation of LP current transformers. Ensure continuous double insulation of LP current transformers to mains and measuring circuits.

5 Network Systems

Suitable mains systems and maximum rated voltages (DIN EN 61010-1/A1):

• Three-phase 4-conductor systems with grounded neutral conductor: IEC UL-N: 277 V / UL-L: 480 V
• Three-phase 3-conductor systems with grounded phase: UL-L: 480 V
• Three-phase 4-conductor systems with ungrounded neutral conductor (IT networks): IEC UL-N: 277 V / UL-L: 480 V
• Three-phase 3-conductor systems ungrounded: UL-L: 480 V

Application Areas

• 3- and 4-conductor networks (TN, TT, and IT networks).
• Residential and industrial sectors.

6 Voltage / Current Measurement

The device:

• Has 4 voltage inputs.
• Measures current exclusively via current transformers.
• Permits connection of current transformers with ratios of ../1 A and ../5 A (UMG 806) or ../333 mV (UMG 806-LP).
• Does not measure DC currents.

LP current transformers require double insulation throughout according to IEC 61010-1.

Diagram Description: Wiring diagrams for different system types (3P4W, 3P3W) showing connections for voltage (V1, V2, V3, VN) and current (I1, I2, I3) inputs, with S1/S2 terminals for current transformers.

[WARNING] Risk of injury or damage due to electrical voltage and improper connection! Connecting voltage lines to current measurement inputs poses a fire hazard. Before work, de-energize the system, secure against re-energization, verify disconnection, ground, short circuit, and cover adjacent live parts. Check all connections carefully. Do not apply DC voltage to voltage inputs. Equip voltage inputs with suitable, marked fuses and disconnectors. Voltage measurement inputs are dangerous to touch. Connect voltages exceeding permissible network voltages via voltage transformers. Measured voltages and currents must originate from the same network.

[WARNING] Risk of injury due to high currents and high electrical voltages! Touching live cores or hazardous device inputs can cause serious injury or death. De-energize the system, secure against re-energization, verify disconnection, ground and short circuit, and cover adjacent live parts.

[WARNING] Electrical currents and voltages! High voltage peaks from secondary-side open current transformers can cause serious injury or death. Avoid open operation of current transformers and short-circuit unloaded transformers (except LP current transformers with mV output).

[CAUTION] Transmission errors and property damage due to electromagnetic interference! Recommended cable length to LP current transformers is max. 5 m. Interference can cause measurement errors or damage. Use shielded cables depending on ambient conditions and connect the shield on one side in the switch cabinet.

7 Establishing the Connection to the PC

Common connection methods for PC communication:

• RS485: Via interface converter or via a UMG 604 as a gateway.
• RS232: Via interface converter.
• USB: Via interface converter.

Diagram Description: Illustrates PC connection methods using RS485, RS232, and USB, including setups with interface converters and a UMG 604 gateway.

[CAUTION] Property damage due to incorrect network settings. Incorrect settings can cause IT network faults. Consult your network administrator for correct settings.

Example: PC Connection via RS485 Interface and UMG 604 Gateway

This setup allows device configuration and data retrieval.

RS485 Bus Structure

• Connect all devices in the RS485 bus structure according to the master/slave principle.
• Position the gateway (master) at the beginning or end of the bus structure.
• A segment can accommodate up to 32 participants/devices.
• Terminate each segment with termination resistors (120 Ω, 0.25 W) at the beginning and end. The device itself does not contain a termination resistor.
• Use repeaters to connect segments if there are more than 32 participants.
• Refer to the user manual for cable type and other information.

Diagram Description: Shows correct and incorrect RS485 bus connections, illustrating terminal strips, devices with and without termination resistors.

[INFORMATION] Assign slave devices in the RS485 bus structure different device addresses, ensure addresses differ from the master device, use the same transmission rate (baud rate), and the same data frame.

8 Wiring of UMG 806 / UMG 806-LP

Diagram Description: Terminal block layout showing connections for Power Supply (L, N), Communication (RS232, RS485), Energy Pulse, PT100 Temperature, Current Inputs (I1-I5), and Voltage Inputs (V1, V2, V3, VN) with S1/S2 terminals.

9 Operation

Configure Device

• Press and hold buttons 1 and 2 simultaneously for 1 second to switch between display and configuration mode.
• Enter the password using Button 1 (confirm/change digit position) and Button 2 (increase digit). Factory setting: 0000 (no password).
• Parameter address 000 appears for configuring primary current transformers (I1-I3). Configure additional parameters using buttons 1 and 2 (see "Basic Parameters" table). A parameter list is also available in the user manual.
• To complete and save configuration, press and hold buttons 1 and 2 simultaneously. The device switches to display mode.

[INFORMATION] A detailed description of device configuration and parameters is in the user manual. Other usage information, like the user manual or Modbus address list, is available on the homepage www.janitza.de under Downloads.

Basic Parameters

* The secondary side of the UMG 806-LP is permanently set to 333 mV.

10 Technical Data

General Information

• Net weight: approx. 300 g
• Device dimensions: approx. W=90 mm, H=90 mm, D=63.5 mm
• Horizontal pitch: 5 HP
• Battery Type: CR1632, 3 V, Li-Mn
• Service life of the backlight: 45000 h (50% of starting brightness)
• Installation position: Discretionary
• Impact resistance: IK04 according to IEC 62262

Transport and Storage

Applies to devices transported and stored in original packaging.

• Free fall: 1 m (39.37 in)
• Temperature: -30 °C (-22 °F) to +80 °C (176 °F)
• Relative humidity: 5 to 95% RH at 25 °C (77 °F), non-condensing

Ambient Conditions During Operation

• Must be used in a weather-protected, stationary application.
• Fulfills operating conditions according to DIN IEC 60721-3-3.
• Possesses protection class II according to IEC 60536 (VDE 0106, Part 1); a ground wire connection is not required.
• Measurement temperature range: -25 °C (-13 °F) to +70 °C (158 °F)
• Relative humidity: 5 to 95% RH at 25 °C (77 °F), non-condensing
• Operating height: < 2000 m (6560 ft) above sea level
• Pollution degree: 2
• Ventilation: No external ventilation required.
• Protection against foreign bodies and water: IP20 i.a.w. EN60529

Supply Voltage

• Nominal range: AC: 100 V - 300 V 50/60 Hz / DC: 100 V - 300 V OVC III
• Operating range: +/-10% of the nominal range
• Power consumption: max. 7 VA, 3 W
• Recommended overcurrent protection device for line protection: 5 A (char. B), IEC-/UL approval

Voltage Measurement

• 3-phase 4-conductor systems with rated voltages up to: 277 VLN / 480 VLL (+/-10%) acc. IEC, 277 VLN / 480 VLL (+/-10%) acc UL
• 3-phase 3-conductor systems with rated voltages up to: 480 VLL (+/-10%) acc. IEC, 480 VLL (+/-10%) acc UL
• Overvoltage category: 300 V CAT III acc. IEC, 300 V CAT III acc UL
• Rated surge voltage: 4 kV
• Fuse for voltage measurement: 1 - 10 A tripping characteristic B (with IEC/UL approval)
• Metering range L-N: 0¹⁾ .. 230 V_rms (max. overvoltage 277 V_rms)
• Metering range L-L: 0¹⁾ .. 400 V_rms (max. overvoltage 480 V_rms)
• Resolution: 0.1 V
• Crest factor: 2 (based on metering range 230 V L-N)
• Impedance: ≥ 1.7 MΩ/phase
• Power consumption: approx. 0.1 VA / phase
• Sampling frequency: 8 kHz / phase
• Frequency of the basic oscillation: 45 Hz .. 65 Hz, Resolution: 0.01 Hz
• Harmonics: 1 .. 31

¹⁾ The meter only measures if at least one voltage measurement input has an L-N voltage of > 10 V_rms or an L-L voltage of > 17 V_rms present.

Current Measurement (../1 A) (../5 A) UMG 806

• Rated current: 1 A / 5 A
• Channels: 4
• Measurement range: 0.01 .. 6 A_rms
• Crest factor (based on rated current): 2
• Overload for 1 sec.: 100 A (sinusoidal)
• Resolution: 1 mA
• Overvoltage category: 300 V CAT III
• Rated surge voltage: 4 kV
• Power consumption: approx. 0.2 VA
• Sampling frequency: 8 kHz
• Harmonics: 1 .. 31

Current Measurement (../333 mV) UMG 806-LP

• Nominal input signal: .. / 333 mV
• Channels: 4
• Measurement range: 0.3 .. 400 mV_rms
• Crest factor: < 2.4
• Overload for 1 sec.: 1 V
• Resolution: 0.00333 mV
• Power consumption: < 0.1 VA
• Sampling frequency: 8 kHz
• Harmonics: 1 .. 31

RCM Current Measurement (0 .. 40 mA)

• Channel (I5): 1

Digital Output / Energy Pulse Output

• Switching voltage: max. 35 V DC
• Switching current: max. 10 mArms DC
• Response time: approx. 500 ms
• Pulse width: 80 ms ±20 %
• Pulse output (energy pulse): max. 10 Hz

Temperature Measurement

• Update time: 1 s
• Total burden (sensor and lead): max. 0.35 kΩ
• Suitable sensor types: PT100
• Line length (digital output; temp. measurement): Up to 30 m (32.81 yd.) Unshielded; Greater than 30 m (32.81 yd.) Shielded

RS485 Interface

• 2-wire connection.
• Protocol: Modbus RTU
• Transmission rate: up to 115.2 kbps

Terminal Connection Capacity

• Supply voltage: Connectable conductors: Single core, multi-core, fine-stranded 0.14 - 2.5 mm², AWG 26-14. Cable end sleeve (not insulated) 0.25 - 2.5 mm², AWG 23-14. Cable end sleeve (insulated) 0.25 - 1.5 mm², AWG 23-16. Tightening torque: 0.5 - 0.6 Nm. Stripping length: 7 mm.
• Current measurement: Connectable conductors: Single core, multi-core, fine-stranded 0.2 - 4 mm², AWG 24-12. Cable end sleeve (not insulated) 0.25- 2.5 mm², AWG 23-14. Cable end sleeve (insulated) 0.25 - 1.5 mm², AWG 23-16. Tightening torque: 0.5 - 0.6 Nm. Stripping length: 7 mm.
• Voltage measurement: Connectable conductors: Single core, multi-core, fine-stranded 0.2 - 4 mm², AWG 24-12. Cable end sleeve (insulated/not insulated) 0.25- 2.5 mm², AWG 23-14. Stripping length: 7 mm.
• RS485, digital output, temp. measurement: Connectable conductors: Single core, multi-core, fine-stranded 0.2 - 4 mm², AWG 24-12. Cable end sleeve (not insulated) 0.25- 2.5 mm², AWG 23-14. Cable end sleeve (insulated) 0.25 - 1.5 mm², AWG 23-16. Tightening torque: 0.5 - 0.6 Nm. Stripping length: 7 mm.

[INFORMATION] Additional technical data can be found in the user manual for the device at www.janitza.com.