CN201072734Y - Instantaneous electricity-consumption AC contactor - Google Patents

Abstract

The utility model relates to an AC contactor field, which provides an AC contactor consuming electricity accidentally and is mainly characterized in that the iron core of the pull-in coil adopts prismatical iron core, a controlling switch adopts a normal open press button, and the coil of a movable arm locking device are connectedly arranged with a low-voltage controller. Compared with the existing AC contactor, the invention has the obvious advantages that the electricity using time is short, the power saving rate can reach above 99.5 percent, the work doesn't generate heat, the service life is long and the low-voltage automatic protection can be conducted.

Description

Instantaneous power consumption AC contactor

technical field

The utility model belongs to the field of electrical switches and relates to an AC contactor, in particular to an instantaneous power consumption AC contactor.

Background technique

AC contactor, as a switch that uses electromagnetic attraction to make contacts frequently conduct and cut off AC power, is widely used in the control of electrical equipment in electric power transmission systems. The existing AC contactor mainly includes: bracket, boom, moving contact, static contact, the iron core of the pull-in coil is a "day"-shaped silicon steel sheet iron core, and the control button of the pull-in coil is a normally closed button. When this kind of AC contactor is working, the coil is always charged, and the working current is large, 90% of the electric energy is lost in the hysteresis, eddy current and short-circuit ring, and most of the active power consumption is converted into heat and lost, and even burns the coil, etc. Failure, large magnetic noise during operation, resulting in noise pollution.

Utility model content

In the production practice of the designer, it is found that the existing AC contactor has the above-mentioned defects such as high power consumption, large magnetic noise, and easy damage to the product. The purpose is to provide an instantaneous power consumption AC contactor that can better overcome the existing AC contactor. Eliminate the defects of the device, realize low power consumption, no magnetic noise, and long product life.

The technical solution adopted by the utility model is to design an instantaneous power consumption AC contactor, its structure includes: casing, boom, moving contact, static contact, pull-in coil, and a moving contactor is set on any side of the moving arm. Arm locking device, the coil of the boom locking device is connected to the low voltage controller.

Among them, the iron core of the pull-in coil is changed to a cylindrical iron core, which is fixed at the lower end of the boom, embedded in the yoke coil, and the lower part is cushioned with a reaction force spring; the control button of the pull-in coil is a normally open button.

Among them, the boom locking device adopts a recessed platform on any side (at least one side) of the boom, and a pull-in coil is arranged laterally below the pull-in direction of the boom outside the concave platform as a tripping coil. The arms touch on the same side. In order to strengthen the locking, a permanent magnet block can also be arranged in the concave platform. After the instantaneous power loss of the pull-in coil, the boom is blocked, so that the moving contact and the static contact still keep in contact with each other.

Wherein the low-voltage controller adopts the existing voltage detection circuit to be connected with the tripping coil of the boom locking device to unlock the boom, and when the power supply voltage is too low (below 85%), the power supply is automatically cut off, and the Electrical protection.

Since the utility model adopts the above technical measures to improve the existing AC contactor, it has the following obvious advantages and effects:

1. Power saving. Only when switching between on and off, the pull-in coil only uses electricity for a short time. During normal operation, due to the action of the boom locking device, the pull-in coil is not charged, and the electrical equipment is powered on. After trial, the power saving is more than 99.5%.

2. The AC contactor does not generate heat. Since it does not consume power during work, the temperature of the AC contactor is consistent with the ambient temperature during normal work.

3. No magnetic noise pollution. Since the iron columnar iron core is used instead of the "day"-shaped silicon steel sheet iron core, there is no magnetic noise, no magnetic vibration, and the price is low.

4. The service life of the product is extended. Since no power is consumed during work, the AC contactor is not prone to failure.

5. Low voltage automatic protection. When the grid voltage is lower than 85%, it can automatically cut off the power supply to ensure the safety of lines and equipment.

Description of drawings

Fig. 1 shows the structural diagram of the instant power consumption AC contactor of the present utility model.

Detailed ways

The specific structure of the instant power consumption AC contactor of the present utility model is further described in conjunction with the accompanying drawings and embodiments, and its features and advantages are more clear.

Embodiment 1 of the instant power consumption AC contactor of the present utility model, see Fig. 1, its structure includes: casing 1, boom 2, moving contact 3, static contact 4, pull-in coil 7, arranged on the boom 2 Boom locking devices 5, 6 and low voltage controller 8 on the left side of the middle. Among them, the iron core 7.1 of the pull-in coil 7 adopts a cylindrical iron core, the boom 2 can adopt a non-metallic boom, the upper end protrudes from the casing 1, and the lower end is fixed with an iron core 7.1, and the iron core 7.1 is embedded in the yoke iron coil 7.2 In the center, a reaction force spring 7.3 is placed below, and the start button RD (not shown in the figure) of the pull-in coil 7 adopts a normally open button; wherein the boom locking device 5, 6 includes a concave platform 5 set on the left side of the boom 2 (Permanent magnet block can be built-in in the recessed table), the tripping coil 6 that is basically the same structure as the pull-in coil 7 is set laterally below the pull-in direction of the swing arm of the recessed table 5, and the outer end of its iron core is in the same position as the left side of the swing arm 2. close to; wherein the low-voltage controller 8 adopts an existing voltage detection circuit (not attached) to connect with the tripping coil 6 of the boom locking device, and is arranged on the casing 1 .

Press the start button RD, the iron core 7.1 of the pull-in coil 7 moves downward in the yoke coil 7.2, driving the boom 2 to move down, the moving contact 3 contacts the static contact 4, and at the same time the tripping coil of the boom locking device The outer end of the iron core 6 enters the concave platform 5 on the left side of the boom and is locked. When the hand leaves the button RD, the pull-in coil 7 loses power. At this time, the boom 2 has been mechanically locked by the locking devices 5 and 6, and the moving contact The close contact with the static contact has realized that the pull-in coil is not charged and the electrical equipment is powered on. Make the AC contactor stop running, press the button TZ of the low voltage controller 8, the tripping coil 6 is charged, the outer end of its iron core is sucked away from the concave platform 5 of the boom 2 to unlock, and at the same time, the iron core of the coil 7 is attracted 7.1 Under the action of the reaction force spring 7.3, the moving contact 3 on the boom 2 is disconnected from the static contact 4, the power supply is cut off, and the electrical appliances stop running.

When the power supply voltage is too low (lower than 85%), the relay SSR of the low voltage controller 8 acts, and the dBH contact is closed, so that the tripping coil 6 is charged, and the outer end of the iron core is sucked away from the concave platform 5 of the boom 2 to unlock , the iron core 7.1 of the pull-in coil 7 is under the action of the reaction force spring 7.3, so that the movable contact 3 is out of contact with the static contact 4, the power supply is automatically cut off, and the electrical appliances stop running, which is effectively protected.

Embodiment 2 of the instant power consumption AC contactor of the present utility model, see Fig. 1, its structure includes: The side) portion is opposite to the boom locking device 5 and 6, and another auxiliary boom locking device (not shown) is arranged, and its tripping coil is connected with the circuit of the low voltage controller 8 .

Claims (4)

1. an instantaneous power consumption A.C. contactor comprises casing, swing arm, and moving contact, fixed contact, pull-in winding is characterized in that in any side of swing arm the swing arm locking device being set, and the coil of swing arm locking device connects the low-voltage controller.

2. as the instantaneous power consumption A.C. contactor of claim 1, it is characterized in that the iron core of described pull-in winding adopts columnar iron core, the control button of pull-in winding adopts often leaves button.

3. as the instantaneous power consumption A.C. contactor of claim 1, it is characterized in that described swing arm locking device, employing is set the position in any side of swing arm and is offered concave station, the described pull-in winding of horizontally set below the swing arm adhesive direction outside concave station, as breaking coil, its iron core outer end contacts with the swing arm homonymy.

4. instantaneous power consumption A.C. contactor as claimed in claim 3 is characterized in that in described concave station permanent-magnet block being set.

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