Current Transformers and Voltage Taps

Anywhere high currents are measured and processed, WAGO's current transformers are your first choice. Voltage taps also easily and safely tap the measurement voltage in existing systems.

Your benefits:

  • Safe, secure wiring with CAGE CLAMP® Connection Technology
  • Full range of products for new systems, as well as for retrofitting existing installations
  • Coordinated components for your energy data management

Product Overview

New Product

Energy Meters (MID)

The Benefits for You:

  • Record values for active and reactive energy and mains frequency, as well as current, voltage and power for all phases
  • Compliance with the MID Directive 2014/32/EU allows consumption billing applications
  • Professional communication thanks to the M-Bus and Modbus® interface and two S0 pulse outputs
  • Intuitive configuration with touch-sensitive controls and configuration app via Bluetooth®
  • Full transparency with an illuminated full-format display
  • Push-in CAGE CLAMP® and lever save time at every stage
  • Slim design conserves valuable control cabinet space

An All-in-One Solution from a Single Source

WAGO Current Transformers and Energy Meters (MID)

Plug-in current transformers for billing measurement join WAGO’s range of current and energy measurement solutions. These transformers comply with the conformity assessment procedure (module D) and the perfect combination with the new WAGO Energy Meters (MID) to form a complete solution. A quick-mount kit allows easy, cost-effective installation. A large number of mounting options give users tremendous flexibility. The new plug-in current transformers are used in applications where the current of large loads cannot be measured directly. A real-world example is measuring manufacturing machines’ energy consumption in order-related production or when individually billing the energy consumption of each tenant in distributed properties.

Our Products from the Current Transformer and Voltage Tap Range

Rogowski Coils

WAGO’s 855 Series Rogowski Coils feature a closed-air coil with a non-magnetic split core and reliably convert AC currents.

The Benefits for You:

  • Reduced footprint – ideal for measuring high currents via split core
  • Easy to use via bayonet lock and anchor points for cable ties
  • Higher security via sealable bayonet lock
  • Direct connection of Rogowski coils to the 3-Phase Power Measurement Module (750-495/000-002)
  • Ready for worldwide use in many industries, thanks to UL listing

Plug-In Current Transformers with picoMAX® Connection Technology

The Benefits for You:

  • Easy secondary cable installation via pluggable picoMAX® Connection Technology
  • Space-saving assembly directly above the circuit breaker, thanks to side latches for optimum serial mounting
  • UL listed

Split-Core Current Transformers

The Benefits for You:

  • Compact and separable split-core current transformers – ideal for retrofitting existing systems
  • No current path interruption
  • Easy and cost-effective installation via cable ties
  • Transformer leg (855-5xxx) can be completely removed if space is tight

Plug-In Current Transformers with CAGE CLAMP® Connection Technology

The Benefits for You:

  • Screwless CAGE CLAMP® Connection Technology
  • Quick-mount kit for easy and cost-effective installation
  • Tremendous versatility thanks to several mounting options
  • Easy transformer short-circuiting via redundant secondary terminals S1 and S2
  • UL listed

Voltage Taps for Insulated Conductors

WAGO’s 855 Series Voltage Taps easily and safely tap the measurement voltage in existing systems. Conductor contact is made via IDC connection for fast voltage tap-off.

The Benefits for You:

  • Safely tap the measurement voltage in no time
  • Tool-free insulation displacement connection guarantees secure installation.
  • 2 A fuse possible, 5 x 25 mm
  • For insulated conductors up to 16 mm2 (6 AWG)

Voltage Taps for Busbars

The Benefits for You:

  • Fast, easy installation on a live busbar with clamp mount or M6/M8 mounting
  • Various marking options for clear identification
  • Universal conductor termination via Push-in CAGE CLAMP® connection technology
  • Fused voltage path protects downstream measurement devices

Current and Voltage Tap

A combination of current transformer and voltage tap, the current and voltage tap can be quickly and easily mounted in the jumper slot of the 95 mm2 (4/0 AWG) high-current through terminal block (285-195).

The Benefits for You:

  • Power data can be directly tapped on the power supply
  • Integrated 25 A/1 A current transformer
  • Complies with accuracy class 0.5 per EN 61869-2 for exact measurement results
  • Fused voltage path protects downstream measurement devices

Current and Voltage Signal Conditioners and Power Measurement Modules

Besides current and voltage signal conditioners which record DC and AC currents and voltages, this impressive range also includes a power measurement module that can measure current and voltage in parallel, convert them to power and output them as an analog standard signal. Additionally, WAGO’s signal conditioner for Rogowski coils offers a solution for retrofitting existing systems. Thus it is not necessary to disconnect the live conductor. The new WAGO 3-Phase Power Measurement Module measures all relevant parameters in a three-phase supply network – voltage, current, power, harmonics, etc. – from within the control cabinet.

Your Benefits:

  • Signal acquisition of DC and AC voltages up to 300 VAC/VDC using modules that are just 6 mm wide
  • AC currents up to 4000 A via Rogowski coil
  • Switchable filter function to prevent signal interference
  • A digital signal output (DO) reacts to freely configurable measurement range limits (this allows use as a threshold value switch – with activation/deactivation delay).

Light Monitoring with WAGO's 2857-550 Current Signal Conditioner

3-Phase Power Measurement Modules

The power measurement modules in a DIN-rail mounting enclosure offer the ideal solution for measuring currents and voltages in a three-phase supply network remotely from the control level. Measured variables such as active/apparent/reactive power, energy consumption, power factor, phase angle and frequency can be accessed via Modbus® interface. Two integrated RJ45 sockets streamline the interconnection of up to 32 devices.

The Benefits for You:

  • Measurement via current transformers or Rogowski coils: Flexible selection of upcoming measurement tasks
  • Slot for microSD cards: Fast and secure mobile measurement, including recording
  • Compact device in DIN-rail-mount enclosure: Saves space in building technology
  • Modbus® Interface (RS-485): Provision of the measured values via Modbus®
  • Digital signal output as pulse output (pulses/kWh are configurable): Continuous energy consumption monitoring

Power Measurement with the 3-Phase Power Measurement Module (2857-570/024-001)

Discover Products

All Products

Discover WAGO’s wide range of current transformers and voltage taps.


Inspiration for You

Current Measurement and Analysis

WAGO’s Solution for Energy Monitoring and Conservation

Compact Transformer Terminal Blocks

Pre-assembled terminal block assembly for easy connection and short-circuiting of current transformers, suitable for 3-phase power measurement modules

Compact Transformer Terminal Blocks

The simple solution to reliably short-circuit current transformers that are not directly wired to a load; also available for 3-phase circuits


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