JPS6364849B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an operating device for a circuit or disconnection equipped with an electric spring operating mechanism.

(Prior Art) FIGS. 1 and 2 show an operating device equipped with a conventional electric spring operating mechanism, in which an electric motor 1 rotates a crank 2 via a gear system to pull a closing spring 3. The limit switch 4 operates and stops at the dead point D, and the electric motor 1 rotates in response to the closing command, and the closing cam 5 and closing spring 3 close the circuit via the link device 6. The circuit 7 is closed. At the same time, limit switch 4 operates and motor 1
The closing spring 3 is charged with . The circuit breaker 7 is opened by activating the trip device 8 to break the link device 6.

Figure 3 is a conventional operating circuit diagram, where P and N are the power supply, a is the normally open auxiliary contact of the circuit breaker, b is the normally closed auxiliary contact of the circuit breaker, and LSa is the normally open auxiliary contact of the limit switch. Open contact, LSb is the normally closed contact of the limit switch, M is the motor 1, X is the control relay, Xa is the normally open contact of the control relay, Xb is the normally closed contact of the control relay, Lb is the automatic shear failure alarm normally closed contact, Tc is a trip coil, CSc is a closing switch, and OSc is an opening switch.

When power supply P and N are applied with circuit breaker 1 open, terminal P ₁ - Auxiliary contact b - Contact Xb - Contact LSb
- Contact Xb - Motor M - The circuit of terminal N ₁ rotates the motor 1, and the closing spring 3 reaches the dead point D.
Contact LSb opens and stops when the voltage does not exceed .
In the closing operation, when the closing switch CSc is closed, the control relay X is excited by the circuit of terminal H - contact _Lb - control relay If the circuit exceeds the dead point D, the circuit breaker 7 is turned on.

(Problem to be Solved by the Invention) Therefore, in the process of accumulating energy in the closing spring 3, before the contact of the limit switch 4 is switched, the closing switch is
When CSc is closed, control relay X operates and contact Xb
Since the circuit is opened, the storage itself is also stopped and a phenomenon occurs in which it is not possible to input the energy. Generally, the loading time is 1 to 2
seconds, and the energy storage time is 3 to 5 seconds. As mentioned above, the timing to close the closing switch CSc in the open state is only after the energy storage is completed, so it is not applicable to a two-system automatic sequence system, and in addition, the timing to close the closing switch CSc in the open state is not applicable to a two-system automatic sequence system. Since contact b does not close until later, energy storage cannot be performed, which is an inconvenience.

The present invention has been made in view of the above-mentioned drawbacks, and it stores the power of the closing spring immediately after closing the circuit or disconnector.
It is an object of the present invention to provide an operating device for a circuit and a disconnector that can store a closing command in conjunction with a pumping circuit during energy storage operation.

[Structure of the invention]

(Means and actions for solving the problem) A power storage circuit that rotates the electric motor to store energy in the closing spring to the dead point, and a power storage circuit that excites the control relay by turning on the closing switch and A control relay circuit that closes the normally open contact of the control relay and rotates the motor to release the closing spring and performs the closing operation, and a control relay circuit that closes the normally open contact of the control relay circuit and energizes the auxiliary relay. The circuit consists of an auxiliary relay circuit that opens the normally closed contact of the auxiliary relay to demagnetize the control relay, and a normally open contact of the auxiliary relay that maintains itself and adds resistance with the normally closed contact of this auxiliary relay. It is possible to provide an operating device for a circuit breaker which stores power in a closing spring immediately after closing the circuit breaker, and stores a closing command during the energy storage operation together with a pumping circuit.

(Example) An example of the present invention shown in the drawings will be described below. In FIG. 4, parts having the same functions as those in FIG. 3 are designated by the same reference numerals, and their explanations will be omitted. Y is an auxiliary relay, Ya is a normally open contact of the auxiliary relay, Yb is a normally closed contact of the auxiliary relay, and R ₁ , R ₂ , R ₃ , and R ₄ are resistances.

Contacts LSb, LSb and motor M are connected in series between terminals P ₁ and N ₁ , and contacts are connected in parallel with contacts LSb and LSb.
Connect LSa and contacts Xa and Xa in series, and after these contacts Xa and Xa, contact Yb, control relay X, and resistors R ₁ and R ₂ connected in series, and connect them in parallel to motor M. , the contact LSb and the electric motor M and the contact Xa and the contact Yb are connected via the contacts Xa and Xa. Contact Lb, contact Ya, auxiliary relay Y, and resistors R ₃ and R ₄ are connected in series between terminals H and N ₁ , contact a is connected to contact Ya, contact Yb is connected to resistor R ₄ in parallel, and contact It connects between Lb and contact Ya and between contact Xa and contact Yb.

Next, when power supplies P and N are applied, terminal P ₁ - contact
LSb - Contact LSb - Motor 1 due to the circuit of motor M
rotates, and when the closing spring 3 does not exceed the dead point D, the contact LSb opens and stops, and the contact LSa
becomes a closed circuit. In the closing operation, when the closing switch CSc is closed, the control relay X is energized by the circuit of terminals H - contact _Lb - contact _{Yb -} control relay P ₁ - Contact
LSa - Contacts Xa (4 in series) - Motor M - Terminal N ₁ The motor M rotates in the circuit, and the closing spring 3 crosses the dead point D, closing the circuit and the circuit breaker 7.

When the circuit or disconnector is turned on, contact a closes and terminal H - contact a - auxiliary relay Y - resistor R ₃ - contact Yb -
Auxiliary relay Y operates in the circuit of terminal _N1 , contact Yb opens the circuit of control relay X, and motor M becomes a contact.
It rotates and stops until LSa opens. Even if the circuit or disconnector opens, the auxiliary relay Y remains the closing switch.
Self-holding at contact Ya by CSc, control relay X
Since contact Yb is open, a pumping prevention circuit is formed in which closing operation cannot be performed.

On the other hand, even if the closing switch CSc is closed while the circuit breaker is open before the contacts LSa and LSb are switched, the motor M will rotate only by energizing the control relay X. Furthermore, even if the closing switch of the closing switch is a pulse-like _one -shot, when the control relay
The circuit of Yb - Control relay X - Resistor R ₁ - Resistor R ₂ - Terminal N ₁ forms a closing command memory circuit that holds the control relay After the power is turned on, the electric motor M rotates until the re-storage is completed as described above and then stops.

Furthermore _, even if _the same relay is used as the control relay
always operates earlier than control relay X, forming a self-holding circuit.

〔Effect of the invention〕

As described above, according to the present invention, in an operating device equipped with an electric spring operation mechanism having a dead point for a closing spring without providing a closing catch, the electric motor is rotated to move the closing spring to the dead point. There is an energy storage circuit that stores energy, a control relay circuit that closes a normally open contact in response to a closing command, rotates the motor, releases the closing spring, and closes the circuit, and a control relay circuit that opens a normally closed contact when the closing command is made to activate the control relay. By consisting of an auxiliary relay circuit that discharges magnetism, a normally open contact of this auxiliary relay for self-holding, and a normally closed contact of this auxiliary relay that adds resistance, the operation circuit does not need to be complicated. It has excellent effects such as the ability to store the energy of the closing spring and store the closing command in conjunction with the pumping circuit, and to be compatible with a two-system automatic sequence system.

[Brief explanation of drawings]

Fig. 1 is a front view showing a circuit breaker operating device equipped with an electric spring operating mechanism, Fig. 2 is a left side view,
FIG. 3 is an operating circuit diagram of a conventional circuit breaker operating device, and FIG. 4 is an operating circuit diagram showing an embodiment of the circuit breaker operating device of the present invention. 1... Electric motor, 3... Closing spring, 4... Limit switch, 6... Link device, LSa... Normally open contact of limit switch, LSb... Normally closed contact of limit switch, M... Motor, X... Control Relay, Xa... Normally open contact of control relay, Y... Auxiliary relay, Ya... Normally open contact of auxiliary relay, Yb...
Normally closed contact of auxiliary relay, Lb... Normally closed contact for automatic breakage alarm, CSc... Closing switch, a... Normally open auxiliary contact for circuit breakage, R ₁ , R ₂ , R ₃ , R _Four ……
resistance.

Claims (1)

[Claims] 1. In a circuit or disconnection operating device equipped with an electric spring operating mechanism that has a dead point for a closing spring during a closing operation, the electric motor is rotated to charge the closing spring to the dead point. a control relay circuit that excites a control relay by turning on a closing switch, closes a normally open contact of the control relay, rotates the motor, releases the closing spring, and performs closing operation; , an auxiliary relay circuit that closes the normally open contact of this control relay circuit, energizes the auxiliary relay, opens the normally closed contact of this auxiliary relay, and discharges the control relay; 1. A circuit breaker operating device characterized by adding resistance at a normally closed contact of an auxiliary relay.