Specifications

ManualsBrandsContax ManualsConsumer electronicsPOWER MODULE SYSTEM

T4.5

Contactors

Contax

Contactors

Function

Contactors are electromechanically controlled

switches, mainly used to control high power single-

or multi-phase loads while the control itself can be

(very) low power.

Typical applications are given in figure 1 to 3.

Operation

As long as the control circuit (coil) is energised, the

NO-contacts are closed and the NC-contacts are

opened. From the moment the control circuit is de-

energised again, the contacts return to their rest

position. NO-contacts are opened and NC-contacts

are closed.

Features and benefits

In photo 1, the front views of the 1, 2 and 3 module

contactors are shown. The main characteristics of the

device are printed in the upper part

. These are:

- Switching capacity

- Coil voltage

- Wiring diagram

- 6-digit ordering code

Related to switching capacity, a complete range is

available: 20, 24, 40 and 63A. The 20A contactors have

an AC-coil and as a consequence can only be used on

AC. The 24, 40 and 63A-contactors all have a DC-coil

which makes them absolutely noise-free (NO 50Hz-

noise). A built-in rectifier bridge allows the use of AC as

well as on DC at all times. The coils of all contactors are

protected against over-voltages of up to 5kV by means of

a built-in varistor. Infrequently used coil voltages are also

available. The flag

3 indicates whether or not the coil is

energised. The function of the contactor or the circuit that

is operated by the contactor can be indicated behind the

circuit indicator

4 i.e. hall, living, garage,… . The clearly

marked Pozidriv terminals

5 are all captive.

Two NO or 1NO-1NC auxiliary contacts, used for

remote indication of the contact position of the

contactor, are available for the 24, 40 and 63A

contactors (module types CTX 10 11 or CTX 10 20

respectively). The auxiliary contacts can only be

mounted on the left side of the device (photo 2).

fig.1 Start-stop of a mono-phase lamp-load

fig.2 Direct startup of cage motor

fig.3 Time-clock controlled on-off

switching of a 3 phase electrical heater

1 1

photo 1

photo 2