ABB A 260 Istruzioni per l'uso - Pagina 2

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1SFC 380003-89, 2(4)

AF-Contactors

General

The AF-Contactors have the same dimensions and nearly the same apperance as

the A-Contactors of equal rating. The only difference is that AF-Contactors are

fitted with an electronic coil interface. For a given coil, this interface allows the

contactor to accept a very wide voltage range a well in d.c. as in a.c. , 50 or 60 Hz.

Control with voltage on A1 and A2

Operatin of AF-Contactors can be done as with conventional contactors by

applaying and removing voltage on A1 and A2. The function limits are very exact

compared with a conventional contactor and there is a built in hysterises in the

function.

Note: Minimum length of the starting pulse=70 ms

AF-Contactors comply with international standards IEC 947-1, IEC 947-4-1 and European standards EN 60 947-1, EN 60 497-4-1. Moreover in

environment 2, they meet the electromagnetic compability rules (EMC): additional clauses A11 and A11 to above mentioned EN standards.

Using these materials in environment 1 may lead to radio-interferences requiringthe use of aditional mitigation methods. Here are the definitions

given in the additional clause A11 to standard EN 60 497-1.

Environment 1: "Mainly relates to low-voltage public networks such as residential, commercial and light industrial locations/installations.

Highly distributing sources such as arc welders are not covered by this environment".

Environment 2: "Mainly relates to low-voltage industrial networks/locations/installations including highly distrurbing sources".

2x3

ZA 185, 300

ZAF 185, 300

(A 145...300)

(AF 145...300)

1/4

KZ 185,300

8 Nm - 71 lb.in

2x3

1/4

Position

Contactor

closed

Contactor

open

55% of lower voltage range level

2x3

1/2

100V

250V

Normal range

Accepted range

77% of lower voltage range level

KZ 185,300

1/4

Control

voltage