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Portfolio

The integrated 3VA portfolio consists of two different series of molded case circuit breakers in five different rated operational current versions (sizes).

Sizes

The new 3VA molded case circuit breakers set new standards in flexibility and the variety of modular accessories available. Standardized accessories suitable for use with several sizes of circuit breaker from all the 3VA ranges help to cut costs and save time.

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The new 3VA1 molded case circuit breakers are available in 1 to 4-pole versions (3VA1 160 A) or in 3 and 4‑pole versions (3VA1 100 A or 3VA1 250 A). The new 3VA2 molded case circuit breakers are available in 3 and 4-pole versions.

The circuit breakers are available with rated operational currents ranging from 16 A to 630 A and rated voltages up to 690 V, depending on the series and size.

3VA1 molded case circuit breakers

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The new 3VA1 molded case circuit breakers reliably perform all the tasks associated with line protection.

Features

The key features of the 3VA1 series are:

  • Compact design

  • Depending on size: 1 and 2‑pole versions in size 160 A, 3 and 4‑pole versions in sizes 100 A, 160 A and 250 A

  • Depending on size: Breaking capacity of 16 kA ... 70 kA at 415 V, 3 or 4-pole breakers and 36 kA at 240 V,1-pole breakers

  • Fixed-mounted, plug-in version

  • Thermal-magnetic trip units

  • AC/DC applications

  • No derating up to +50 °C

  • Modular and easy-to-fit internal accessories with diverse functions

  • Uniform accessories platform across all 3VA molded case circuit breakers

Compact dimensions

Thanks to a mounting depth of 70 mm and a cover size of 45 mm, the 3VA1 molded case circuit breakers of sizes 100 A, 160 A and 250 A are ideal for protecting cables and lines in the plant area, especially for the INSTA electrical installation area. For these applications, there is also a wide range of accessories available such as adapters for installation on DIN rails, as well as residual current devices (RCD310 and RCD510) that can be side mounted.

Thermal-magnetic trip units

3VA1 molded case circuit breakers are equipped with a thermal-magnetic trip unit which provides overload and short-circuit protection. This has been developed for implementing economical, cost-efficient installations up to 250 A. It is suitable for use in three-phase networks, AC networks, 400 Hz applications, and with DC currents.

3VA2 molded case circuit breakers

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The new 3VA2 molded case circuit breakers reliably perform all the tasks associated with line and generator protection.

This series is designed for applications with more exacting requirements:

  • Increased breaking capacity

  • Excellent selective protection

  • Integrated metering function

  • Connection to a fieldbus communication system

Features

The most important features of the 3VA2 series are:

  • Compact dimensions

  • 3 and 4-pole versions

  • Four breaking capacity classes from 55 kA … 150 kA

  • Fixed-mounting, plug-in technology, draw-out technology

  • Depending on size: Selective tripping at rated operational current difference 1 : 2.5

  • Electronic Trip Units

  • Retrofittable communication for ETU 5-series and 8-series

  • Depending on the ETU: Integrated metering function

  • AC applications

  • No derating up to +50 °C

  • Modular and easy-to-fit internal accessories with diverse functions

  • Uniform accessories platform across all 3VA molded case circuit breakers

  • Electronic Trip Units (ETU) with different setting values

Compact dimensions with function expansions

In addition to its expanded functionality, the 3VA2 molded case circuit breaker also comes with compact dimensions for fixed mounting, as a plug-in version and a draw-out version.

A cover size of 70 mm for the door cutout and a complete selection of breaking capacity classes from 55 kA to 150 kA at 415 V AC provide the necessary flexibility for planning.

Despite its compact size, the circuit breaker offers the following benefits:

  • Extremely high breaking capacity

  • Extremely good selectivity

  • Electronic trip units, versions with and without integrated metering function and optional fieldbus communication interface

Selective contact system

With its contact system, the 3VA2 molded case circuit breaker is designed for fast selectivity tripping. The selective contact system ensures the following:

  • Dynamic instantaneous short-circuit range

  • High breaking capacity

  • Selective protection response of the molded case circuit breakers in relation to each other

  • Selective protection response of the molded case circuit breakers in relation to other protection devices such as downstream low-voltage fuses, etc.

Electronic Trip Unit (ETU)

The current sensor of the 3VA2 comprises an iron-cored transformer for the internal power supply and a Rogowski coil for precise current measurement. Each transformer can be optimized accordingly for its specific task. Thanks to the high accuracy of current measurement, the 3VA2 molded case circuit breaker is suitable for power/energy measurement. In addition, finer adjustment of ground fault current monitoring is possible.

The Electronic Trip Units (ETUs) provide the following protection functions:

  • Overload protection L ("L" = Long-time delay)
    Adjustable in steps from 40% to 100% of the rated operational current of the molded case circuit breaker.

  • Short-time delayed short-circuit protection S ("S" = Short-time delay) for time-selective response in case of a short circuit

  • Instantaneous short-circuit protection I ("I" = instantaneous):

  • Protection of the neutral conductor against overload and short-circuit ("N" = neutral)

  • Protection against residual currents to ground ("G" = Ground fault).

Energy management and communication

The Electronic Trip Units (ETUs) provide the following energy management and communication functions:

  • Metering functions

  • Communication

  • Flexible, local, digital inputs and outputs via the EFB300 external function box

  • Software commissioning support with powerconfig

  • Testing and archiving with the TD300 and TD500 test devices (with powerconfig)