Lighting control with two switches. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Lighting control with two switches. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electric installation work

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Lighting control from two places, often required in walk-through rooms, corridors and bedrooms

Option 1

Lighting control with two switches
Rice. 1. Lighting control scheme with two switches

Lighting control with two switches
Rice. 2. Appearance of the switch

The wiring diagram for lighting control from two sides consists of two-way switches without a zero position SA1, SA3, which, when switched, switch the power supply from one controlled line to another and, in one of the positions, turn on and off the EL1 lamp.

Option 2

This scheme, along with the first and third connection options, takes place, although its use is highly undesirable, but for general development it must be considered.

Lighting control with two switches
Rice. 3. Lighting control scheme with two switches

Lighting control with two switches
Rice. 4. Appearance of the switch

The scheme of the second wiring option for lighting control from two sides also consists of two-way switches without a zero position SA1, SA3, but there are no controlled lines here, everything works by switching contacts between the phase and neutral conductors.

Disadvantages: constantly changing the scheme of connecting the polarity of the lamp; if the switch is connected by mistake, it threatens with a short circuit and burnout of the switch contacts; in one of the off positions, there is phase voltage on the luminaire.

Option 3

In the third version of the circuit, we consider control using a transit phase conductor.

Lighting control with two switches
Rice. 5. Lighting control circuit with two switches.

Lighting control with two switches
Rice. 6. Appearance of the switch

Lighting control also occurs using two-way switches without a zero position SA1, SA3, which connect the phase voltage from one end of the wire or from the other.

Option 4

Lighting control with two switches
Rice. 7. Lighting control scheme with two switches

Lighting control with two switches
Rice. 8. Appearance of the switch

In addition to two-switch lighting control schemes, consider the intermediate switch control scheme that is used in the multi-switch lighting control scheme.

When connecting, we use only one contact on one side as a common one, and the other two on the other side, to connect controlled lines.

This circuit is suitable in the absence of standard two-pole switches, without a zero position.

Publication: electro.narod.ru

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