ABB A 145 - Page 2

General
Control with voltage on A1 and A2
AF-Contactors
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.
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".
Position
Contactor
closed
Contactor
open
100V 250V
Control
voltage
Normal range
Accepted range
77% of lower voltage range level
55% of lower voltage range level
5
6
x3
x3
1/4
x4
2x3
11
12
9
2x3
10
KZ 185,300
KZ 185,300
2x3
8
7
1
1/4
x4
2x3
2
3
4
13
1/2
5
x4
4
6
1
2
1/4
3
x4
(A 145...300)
ZA 185, 300
ZAF 185, 300
(AF 145...300)
1SFC 380003-89, 2(4)
8 Nm - 71 lb.in