Category: ABB

The GAF contactor range

A compact and efficient way of DC switching

The new GAF range contactors are the latest addition to ABB’s

well established A/AF range. This further extends our offering  of

contactors for DC switching at voltages up to 1000 V DC. The

GAF contactors utilize all the well known features of the existing

A/AF range such as modern and compact design. In addition

all the benefits from the AF coil technology and reliability of a

proven contactor design. These contactors are rated for DC-1

or DC general purpose applications according to IEC 1000 V

DC or cULus 600 V DC. The new GAF contactors share the

external dimensions of its corresponding standard AF contactor.

Reliable

•  The GAF contactor is based on the well proven AF contactor.

•  Less sensitive to voltage drops due to a drop-out voltage

of 55% of the lower nominal value along with 20 ms sag

and dip immunity. These features avoid the problems with

contactor chattering and welding.

•  Elimination of contact bounce and chattering allows for

increased reliability and service life.

Quiet

•  DC powered coil makes the contactor virtually noise free.

Easy

•  The external dimensions of the GAF contactors are the same

as corresponding AF contactors making it easy to order and install.

•  Existing add on accessories for A/AF range of three pole

contactors will fit the GAF contactors.

Product conformity & compliance

REACH (Regulation EC 1907/2006)

AF contactors and related accessories were

classified as Articles and, during normal and

reasonably foreseeable conditions of use, do not

intentionally release any substance or preparation.

ABB continuously undertakes communications

throughout its supply chain in order to collect

information about suppliers’ compliance with

REACH regulation.

SVHC (Regulation EC 1907/2006 REACH)

ABB continuously assesses its products for content

of Substances of Very High Concern (SVHC), as

included in the “Candidate List” by the European

Chemicals Agency (ECHA). According to our best

knowledge, AF contactors and related accessories

do not contain SVHC substances exceeding

0.1 % w/w.

RoHS II

AF contactors and related accessories are within the

scope of Directive 2011/65/EU (RoHS II) and

Amendment 2015/863. starting from July 22 2019.

WEEE

The Waste Electrical and Electronic Equipment

Directive (WEEE Directive) is the European

community directive 2012/19/EU on waste electrical

and electronic equipment (WEEE) which, together

with the RoHS Directive, became European law in

February 2003.

ABB’ range of AF contactors is the industry benchmark. 

The integrated electronically controlled coil offers

multiple benefits over conventional alternatives, and together  with

ABB’s wide product offering an optimal configuration, every time.

AF1250 3-pole contactors are designed for switching power circuits up to 1260 A (AC-1) or 1210 A

UL/CSA general use. Thanks to the AF technology, the contactors accept a wide control voltage range

(48…500 V 50/60 Hz and 24…500 V DC) with only 4 coils managing large control voltage variations,

reducing panel energy consumptions and ensuring distinct operations in unstable networks.

Furthermore, PLC control and surge protection is built-in, offering a compact solution. AF contactors

have a block type design, which can be easily extended with add-on auxiliary contact blocks and an

additional wide range of accessories.

Product safety

Compliance with essential health and safety

requirements has been assured by compliance with

the applicable product and safety standards.

The validation according to the product and safety

standards is carried out by third party tests

laboratory (STIEE / TL030) in respect of the EN ISO/

IEC 17025 European standard, according to IECEE CB

scheme. CB certificate has been issued.

Voltage sag immunity

The ability of equipment to withstand momentary

electrical power interruptions or sags.

Voltage sag

An rms reduction in the AC voltage, at the power

frequency, for durations from a half cycle to a few

seconds. The IEC terminology for this phenomenon

is voltage dip.

Characteristics

• AF09Z…AF38Z, AF40…AF750 contactors and NFZ

contactor relays are compliant to SEMI F47 (1)

and withstand voltage sags for :

– required voltage sag immunity 

– recommended voltage sag immunity (≤ 20 ms)

• Conditions of use: – rated control circuit voltages between 24 V to

500 V AC 50 / 60 Hz (see selection table)

– air ambient temperature -20°C ≤ Ɵ ≤ +60°C 

– 1-stack and factory-mounted 2-stack contactors

(2 stack contactors as AF..-30-11-.., AF..-30-22-..) 

– 1-stack and 2-stack contactor relays- no additional accessories.

(1) AF09Z…AF38Z and AF40…AF370 are compliant with SEMI

F47-0706. AF400…AF750 are compliant with SEMI F47-0200.

AF09Z … AF38Z and AF40 … AF750 contactors, NFZ contactor relays

increase the voltage sag immunity and the uptime of semiconductor

processing equipment without use of specific accessory.

Definitions according to SEMI F47 (1)

SEMIF47 defines the voltage sag immunity required for

semiconductor processing, metrology and automated

test equipment, and on subsystems and components

which are used in the construction of semiconductor

processing equipment including but not limited to:

• Power supplies

• Generators

• Robots and factory interface

• Chillers, pumps, blowers

• AC operated contactors and contactor relays

• …

Voltage sag immunity

The ability of equipment to withstand momentary

electrical power interruptions or sags.

Voltage sag

An rms reduction in the AC voltage, at the power

frequency, for durations from a half cycle to a few

seconds. The IEC terminology for this phenomenon

is voltage dip.

Function

STOTZ selective main circuit breakers operate voltage-independent. They do not require

auxiliary energy for switching the device on or off or for their protection functionality.

A straight forward design ensures the reliable protection function. The functional elements

consist of proven electromechanical components specifically designed for these requirements.

For overload tripping, a thermostatic bimetal is used, as in the case of a standard circuit

breaker. And also as for circuit-breakers, it is necessary to separate main contacts quickly

by using a short-circuit “hammer trip” solenoid to ensure effective short-circuit limitation.

When the downstream protective device has tripped because of a short circuit, the contact

tips reclose again. This occurs without auxiliary voltage through a simple spring-type system.

If a short circuit occurs between the S 750 and the downstream mcb, another bimetal release

enables the short-time delay tripping. Both the selective release and the overload release

trip the mechanism and ensure that contact tips remain in the open position to comply with

isolation requirements.

The current is limited and the arc is quenched as in the case of circuit-breakers.

The underlying switching principle makes a special selectivity behaviour possible: current

limiting selectivity. When a short circuit occurs, the S 750 supports the downstream mcb

and also limits the energy that has an impact on the installation and – subsequently – on the

network of the supplier. The selectivity behaviour of the S 750 offers major advantages over

fuse-based technologies.

Selective main circuit breakers S 750 operate voltage-independent (VI) according to

E DIN VDE 0641-21. i.e. they do not need a control circuit to make or break a contact.

STOTZ selective main circuit breakers S 750 are available with

tripping characteristic E (E = Exact)

They are particularly suitable for the following applications:

● in the meter-mounting board as the main isolating device for the customer

●  in main distribution frames or switchgear as selective group or back-up breaker,

especially where a high degree of service safety is required, e.g. for “installations for

gathering of people”, in “medical locations” and for the supply of safety equipment.

STOTZ selective main circuit breakers fully comply with the requirements of the German

utilities directive (Technical Connection Requirements of Network Operators) concerning the

mandatory pre-meter isolation and protection functions.

For these applications, selective main circuit breakers:

●  ensure load current carrying capability over a large temperature range;

●  protect cables in the case of functional overload;

●  protect cables in the case of a short circuit;

●  clear high short-circuit currents reliable;

●  limit the let-through current and let-through energy also in the case of selective short-circuit

disconnection by downstream mcb

●  provide disconnection and re-connection of installation, also by ordinary people;

●  provide selectivity with respect to downstream circuit-breakers and upstream fuses;

●  ensure highest availibility of electrical power supply for the customer.

Kurzbeschreibung

Selective main circuit breakers of the S 750 series fully comply with E DIN VDE 0641-21.

They operate voltage-independent, i.e. their function does not depend on auxilary source

(SHU). They are designed for mounting onto 40 mm busbar systems (4- or 5-pole, 5/10 mm x 12 mm).

Independant of current rating of S 750. short circuit discrimination of up to 10.000 A or even

higher is available for the downstream circuit-breakers.

The short-circuit capacity of the S 750 is 25 kA (system voltage 230/400 V AC) throughout the

entire range of rated current.

Due to its particular current-limiting selectivity features, STOTZ selective main circuit breakers

support downstream circuit-breakers in limiting the energy when a short circuit occurs, thus

reducing the load on the back-up fuse and the entire electrical installation.

STOTZ selective main circuit breakers are suitable to disconnect and release electric circuits.

STOTZ selective main circuit breakers can be operated by ordinary people. The contact

position is indicated clearly and unambiguously by (1) the position of the operating lever,

clearly identified by the 0-I positions, and (2) also by a separate position indicator

(RED = on, GREEN = off).

Locking

The S 750 (DR) is provided with an integrated locking tab which

makes it possible to block the all poles simultaneously. The

integrated locking tab locks the circuit-breaker in ON or

OFF position and can be additionally protected by a pad

lock, wire seal or cable tie. When locked in ON position, the

protective function is maintained in case of a fault: The

blocked switch handle still permits the tripping of the me

chanism and opening of the contacts in case of overload

or short-circuit (trip-free mechanism). The indicator shows

“green” also in case of a fault with ON position locked –

giving you the certainty that power is switched off.

Furthermore ABB offers the auxiliary contact for

the S 750 DR range. S 750 DR-AUX is a two

change-over contact that indicates the contact

position of the S 750 DR pole(s) independently

and potential-free. This helps to easily monitor individual circuits

Function

Selective Main Circuit-Breaker series S 750 DR

ABB’s S 750 DR is used as a reliable group protec

tion device worldwide. S 750 DR is the right

choice when it comes to selectivity for critical

power application such as hospitals, airports and

data center. But also in residential application

SMCB technology has big advantages. In Germany

SMCB technology became the standard choice for

meter board application where the products

works as a group protection device for down stream circuits.

In order to avoid unauthorized manual switching

the S 750 DR. The S 750 DR is provided with an

integrated locking tab which makes it possible to

block the all poles simultaneously. 

The integrated locking tab locks the circuit-breaker in ON or OFF

position and can be additionally protected by a

padlock, wire seal or cable tie. When locked in ON

position, the protective function is maintained in

case of a fault: The blocked switch handle still

permits the tripping of the mechanism and open

ing of the contacts in case of overload or

short-circuit (trip-free mechanism). The indicator

shows “green” also in case of a fault with ON po

sition locked – giving you the certainty that power

is switched off.