Siemens BETA Low-Voltage Circuit Protection

BETA Protecting

Miniature Circuit Breakers

SJ4 miniature circuit breakers to UL and IEC

1/42

Siemens ET B1 · 10/2008

You can order this quantity or a multiple thereof.

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Overview

UL standards are used in North America, but also in several

other countries. This is of particular importance to European

exporters of electrical switchgear equipment for machines who

export to the USA, as their products will only be accepted if they

meet the relevant UL standards.

A wide range of BETA devices comply with UL standards and

are therefore suitable for implementation worldwide in both

IEC/EN and UL applications within the framework of their

specified use.

Miniature circuit breakers certified to UL 489 permit use as an

all-round solution for protection tasks in distribution boards,

control cabinets and control systems to UL 508A as "branch

protectors". In particular, they are also approved for the protection

of electrical circuits in heating, ventilating and cooling systems

(

HVAC), as well as for DC applications up to 60 V/125 V in the

area of telecommunication applications. The busbar system

according to UL 489 enables fast and simple installation in the

assembly.

This covers a wide range of protection tasks, in residential and

non-residential buildings, as well as in industry. The tripping

characteristics B, C and D to EN/IEC 60898 have been adapted

so that they fall in the permissible tripping range according to

UL 489, as well as for applications at 25 °C and 40 °C.

This means that the devices are approved for use according to

both standards. The enclosure dimensions of the devices

correspond to DIN format. This means that the device series are

suitable for universal use worldwide to IEC or UL standards.

The key difference between the three device series is their

application in different power supply systems.

• 5

SJ4 … -.HG40: 240/120 V AC, 1-pole, "same polarity only",

• 5

SJ4 … -.HG41: 240 V AC, 1-, 2- and 3-pole,

• 5

SJ4 … -.HG42: 480Y/277 V AC, 1-, 2- and 3-pole.

The terminals are suitable for "field wiring". This means that the

devices can be installed not only in factory-finished distribution

boards and control cabinets, but also on-site in a customer

system.

Single, two and three-phase busbars in 3 lengths with 6, 12 or

pins are available as accessories for all device series. The

infeed is over connection terminals, which are available in two

versions, for direct infeed at either the busbar or the miniature

circuit breakers. Pins that are not required can be covered with

touch protection covers.

A handle locking device according to UL is also available as a

further accessory.

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Benefits

•

Can be used globally for all applications in residential,

non-residential and industrial buildings. This facilitates the

planning of plants and enhances export opportunities.

Bus-mounting with direct infeed at busbars with a conductor cross-sec-

tion of up to 50 mm

•

The devices can be used according to IEC/EN 60898 and

UL 489, which means these devices can be installed

anywhere in the world.

Direct infeed at miniature circuit breaker for conductor cross-sections up

to 35 mm