CN220066968U - Four-incoming-line one-connection interlocking power distribution system - Google Patents

Abstract

An interlocking power distribution system for four-wire-in-one connection, comprising; the first transformer is connected with the first bus through a first incoming line switch 1QF 1; the first generator is connected with the first bus through a second incoming line switch 1QF 2; the second transformer is connected with the second bus through a third incoming line switch 2QF 1; the second generator is connected with the second bus through a fourth incoming line switch 2QF 2; a tie switch 1QF3 is arranged between the first bus and the second bus; the first wire inlet switch 1QF1, the second wire inlet switch 1QF2, the third wire inlet switch 2QF1, the fourth wire inlet switch 2QF2 and the interconnection switch 1QF3 are in interlocking connection. The occurrence of accidents such as parallel operation of any two power supplies, even short circuit and the like caused by manual misoperation is prevented. Avoiding economic loss and even casualties.

Description

Four-incoming-line one-connection interlocking power distribution system

Technical Field

The utility model relates to the field of power supply and distribution systems, in particular to an interlocking power distribution system with four incoming lines and one connection.

Background

In the current power supply and distribution system, because of the existence of some important loads (such as indoor places including large data/communication centers, large enterprise machine rooms, financial system machine rooms, industrial automation equipment, dispatching centers and the like, and a large number of primary and secondary loads at the tail ends), a reliable mains supply power supply is needed, and a separate standby power supply is often needed; two transformer incoming lines, two generators and a system for supplying power to two sections of buses, namely a four-incoming line one-communication power distribution system, are arranged. When four power supplies do not meet the parallel operation condition and parallel operation occurs, namely, two power supplies supply power for the same section of bus at the same time, circulation occurs between the power supplies, short-circuit accidents occur, the equipment is influenced, and economic loss is caused.

Disclosure of Invention

In order to solve the problems, the patent designs a primary power distribution system scheme which can supply power reliably for primary and secondary loads, and provides secondary electric interlocking of a control loop between a four-inlet switch and a contact when the power distribution system is in operation, so that any two power supplies are prevented from running in parallel due to manual misoperation, and accidents such as short circuit and the like are prevented. Avoiding bringing economic loss and even casualties.

In order to achieve the above purpose, the technical scheme is as follows:

an interlocking power distribution system for four-wire-in-one connection, comprising;

the first transformer is connected with the first bus through a first incoming line switch 1QF 1;

the first generator is connected with the first bus through a second incoming line switch 1QF 2;

the second transformer is connected with the second bus through a third incoming line switch 2QF 1;

the second generator is connected with the second bus through a fourth incoming line switch 2QF 2;

a tie switch 1QF3 is arranged between the first bus and the second bus;

the first wire inlet switch 1QF1, the second wire inlet switch 1QF2, the third wire inlet switch 2QF1, the fourth wire inlet switch 2QF2 and the interconnection switch 1QF3 are in interlocking connection.

Further, the device also comprises a button switch arranged in the loop.

Further, the circuit also comprises a fuse arranged in the circuit.

The utility model has the beneficial effects that:

according to the utility model, the electrical interlocking scheme is respectively designed on the four power inlet switches and the electrical switching-on loop of the interconnection switch connected with the two sections of buses, so that safe operation of the four power supplies in eight actually possible operating modes can be ensured. The occurrence of accidents such as parallel operation of any two power supplies, even short circuit and the like caused by manual misoperation is prevented. Avoiding economic loss and even casualties.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.

FIG. 1 is a schematic diagram of the wiring of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a first circuit of an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a second circuit of an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a third circuit of an embodiment of the present utility model;

FIG. 5 is a fourth circuit schematic of an embodiment of the present utility model;

fig. 6 is a schematic diagram of a fifth circuit of an embodiment of the present utility model.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1-6, an interlocking power distribution system for four-wire-in-one connection includes;

the first transformer is connected with the first bus through a first incoming line switch 1QF 1;

the first generator is connected with the first bus through a second incoming line switch 1QF 2;

the second transformer is connected with the second bus through a third incoming line switch 2QF 1;

the second generator is connected with the second bus through a fourth incoming line switch 2QF 2;

a tie switch 1QF3 is arranged between the first bus and the second bus;

the first incoming line switch 1QF1, the second incoming line switch 1QF2, the third incoming line switch 2QF1, the fourth incoming line switch 2QF2 and the interconnection switch 1QF3 are connected in an interlocking mode, so that any two power supplies cannot supply power to the same bus section at the same time, the circuit further comprises a button switch arranged in the circuit, and the circuit further comprises a fuse arranged in the circuit.

Eight working modes are arranged between the four power switches and one communication switch, and the eight working modes are respectively as follows:

01: the first transformer supplies power to the two sections of buses at the same time, and the electric interlocking design ensures that after 1QF1 and 1QF3 are switched on, 1QF2, 2QF1 and 2QF2 cannot be switched on, so that any two power supplies cannot supply power to the same section of bus at the same time;

02: the second transformer supplies power to the two sections of buses at the same time, and the electric interlocking design ensures that after 2QF1 and 1QF3 are switched on, 1QF1, 1QF2 and 2QF2 cannot be switched on, so that any two power supplies cannot supply power to the same section of bus at the same time;

03: the first generator supplies power to the two sections of buses at the same time, and the electric interlocking design ensures that after 1QF2 and 1QF3 are switched on, 1QF1, 2QF1 and 2QF2 cannot be switched on, so that any two power supplies cannot supply power to the same section of bus at the same time;

04: the second generator supplies power to the two sections of buses at the same time, and after the 2QF2 and the 1QF3 are switched on, the 1QF1, the 1QF2 and the 2QF1 cannot be switched on, so that any two power supplies cannot supply power to the same section of bus at the same time;

05: the first transformer and the second transformer respectively supply power to the two sections of buses, and the electric interlocking design ensures that after 1QF1 and 2QF1 are switched on, 1QF2, 2QF2 and 1QF3 cannot be switched on, so that any two power supplies cannot supply power to the same section of bus at the same time;

06: the first transformer and the second generator respectively supply power to the two sections of buses, and the electric interlocking design ensures that after 1QF1 and 2QF2 are switched on, 1QF2, 2QF1 and 1QF3 cannot be switched on, so that any two power supplies cannot supply power to the same section of bus at the same time;

07: the first generator and the second transformer respectively supply power to the two sections of buses, and the electric interlocking design ensures that after 1QF2 and 2QF1 are switched on, 1QF1, 2QF2 and 1QF3 cannot be switched on, so that any two power supplies cannot supply power to the same section of bus at the same time;

08: the first generator and the second generator respectively supply power to the two sections of buses, and the electric interlocking design ensures that after 1QF2 and 2QF2 are switched on, 1QF1, 2QF1 and 1QF3 cannot be switched on, so that any two power supplies cannot supply power to the same section of bus at the same time;

when the electric interlocking scheme is designed, the switching-on principle of the frame switch is fully utilized, and the switching-on of the frame switch is controlled through the switching-on/off setting logic of the auxiliary contact of other switches as long as the auxiliary contact (normally closed contact) of other switches is connected in series or in parallel to the electric switching-on loop of the frame switch, so that the interlocking function is realized.

The specific interlocking measures and the corresponding working principle are as follows:

the first incoming line switch 1QF1 is provided with an electric switching-on loop, and the electric switching-on loop is composed of an I# interlocking circuit, an I# electric switching-on loop button 1SB2 and an I# switching-on coil which are sequentially connected from an AC220V live wire end to a zero wire end; the I# interlocking circuit comprises a normally closed contact of the second incoming line switch, a normally closed contact of the third incoming line switch, a normally closed contact of the fourth incoming line switch and a normally closed contact of the contact switch; the normally closed contact of the third wire inlet switch 2QF1 is connected in series with the normally closed contact of the fourth wire inlet switch 2QF2 and then connected in parallel with the normally closed contact of the contact switch 1QF3, and the normally closed contact of the second wire inlet switch 1QF2 is connected in series with the parallel circuit.

The working principle is that when 1QF2 brake opening is met and 1QF3 brake opening or (2 QF1 and 2QF 2) brake opening is carried out simultaneously, auxiliary contacts of corresponding switches are normally closed, and when a 1QF1 electric brake closing loop button 1SB2 is pressed down, a 1QF1 brake closing coil YC is connected, so that 1QF1 electric brake closing is realized; when the conditions are not met, the 1QF1 cannot be switched on;

the second incoming line switch 1QF2 is provided with an electric switching-on loop, and the electric switching-on loop is composed of a II# interlocking circuit, a II# electric switching-on loop button 2SB2 and an I# switching-on coil which are sequentially connected from an AC220V live wire end to a zero wire end; the I# interlocking circuit comprises a normally closed contact of a first wire inlet switch, a normally closed contact of a third wire inlet switch, a normally closed contact of a fourth wire inlet switch and a normally closed contact of a contact switch; the normally closed contact of the third wire inlet switch 2QF1 is connected in series with the normally closed contact of the fourth wire inlet switch 2QF2 and then connected in parallel with the normally closed contact of the contact switch 1QF3, and the normally closed contact of the first wire inlet switch 1QF1 is connected in series with the parallel circuit.

The working principle is that when 1QF1 brake release is met and 1QF3 brake release or (2 QF1 and 2QF 2) brake release is carried out simultaneously, auxiliary contacts of corresponding switches are normally closed, and when a 1QF2 electric brake switch-on loop button 2SB2 is pressed down, a 1QF2 brake-on coil YC is switched on, so that 1QF2 electric brake-on is realized; when the conditions are not met, the 1QF2 cannot be switched on;

the third incoming line switch 2QF1 is provided with an electric switching-on loop, and the electric switching-on loop is composed of a III# interlocking circuit, a III# electric switching-on loop button 4SB2 and a III# switching-on coil which are sequentially connected from an AC220V live line end to a zero line end; the III# interlocking circuit comprises a normally-closed contact of a first wire inlet switch, a normally-closed contact of a second wire inlet switch, a normally-closed contact of a fourth wire inlet switch and a normally-closed contact of a contact switch; the normally closed contact of the first wire inlet switch 1QF1 is connected in series with the normally closed contact of the second wire inlet switch 1QF2 and then connected in parallel with the normally closed contact of the contact switch 1QF3, and the normally closed contact of the fourth wire inlet switch 2QF2 is connected in series with the parallel circuit.

The working principle is that when the 2QF2 brake is met and the 1QF3 brake is separated or the 1QF1 and the 1QF2 brake are separated simultaneously, the auxiliary contact of the corresponding switch is normally closed, and the 2QF1 brake coil YC is connected when the 2QF1 electric brake loop button 4SB2 is pressed down, so that the 2QF1 electric brake is realized; when the conditions are not met, the 2QF1 cannot be switched on;

the fourth incoming line switch 2QF2 is provided with an electric switching-on loop, and the electric switching-on loop is composed of an IV# interlocking circuit, an IV# electric switching-on loop button 5SB2 and an IV# switching-on coil which are sequentially connected from an AC220V live line end to a zero line end; the IV# interlocking circuit comprises a normally-closed contact of a first wire inlet switch, a normally-closed contact of a second wire inlet switch, a normally-closed contact of a third wire inlet switch and a normally-closed contact of a contact switch; the normally closed contact of the first wire inlet switch 1QF1 is connected in series with the normally closed contact of the second wire inlet switch 1QF2 and then connected in parallel with the normally closed contact of the contact switch 1QF3, and the normally closed contact of the third wire inlet switch 2QF1 is connected in series with the parallel circuit.

The working principle is that when the 2QF1 brake is met and the 1QF3 brake is separated or the 1QF1 and the 1QF2 brake are separated simultaneously, the auxiliary contact of the corresponding switch is normally closed, and the 2QF2 brake coil YC is connected when the 2QF2 electric brake circuit button 5SB2 is pressed down, so that the 2QF2 electric brake is realized; when the conditions are not met, the 2QF2 cannot be switched on;

the interconnecting switch 1QF3 is provided with an electric switching-on loop, and the electric switching-on loop is composed of an interlocking circuit, an interconnecting electric switching-on loop button 3SB2 and an interconnecting switching-on coil which are sequentially connected from an AC220V live wire end to a zero wire end; the interconnection interlocking circuit comprises a normally-closed contact of a first wire inlet switch, a normally-closed contact of a second wire inlet switch, a normally-closed contact of a third wire inlet switch and a normally-closed contact of a fourth wire inlet switch; the normally closed contact of the first wire inlet switch 1QF1 is connected in parallel with the normally closed contact of the second wire inlet switch 1QF2, and then is connected in series with the normally closed contact of the third wire inlet switch 2QF1 and the normally closed contact of the fourth wire inlet switch 2QF2 in sequence; the normally closed contact of the third wire inlet switch 2QF1 is connected in parallel with the normally closed contact of the fourth wire inlet switch 2QF2, and then is connected in series with the normally closed contact of the first wire inlet switch 1QF1 and the normally closed contact of the second wire inlet switch 1QF2 in sequence; the two series circuits are connected in parallel.

The working principle is that when the first condition is satisfied: 2QF1, 2QF2, and (1 QF1 or 1QF 2) when either of them is opened; condition II: 1QF1, 1QF2 are opened, and when any one of (2 QF1 or 2QF 2) is opened, the auxiliary contact of the corresponding switch is normally closed, and when the 1QF3 electric closing loop button 3SB2 is pressed, the 1QF3 closing coil YC is connected, so that 1QF3 electric closing is realized; when the conditions are not met, the 1QF3 can not be switched on;

and fuse ends of the switching-on loop of the electric appliance are all connected in series.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the utility model, but rather is presented in the claims.

Claims (3)

1. An interlocking power distribution system for four-wire-in-one connection, comprising;

the first transformer is connected with the first bus through a first incoming line switch 1QF 1;

the first generator is connected with the first bus through a second incoming line switch 1QF 2;

the second transformer is connected with the second bus through a third incoming line switch 2QF 1;

the second generator is connected with the second bus through a fourth incoming line switch 2QF 2;

a tie switch 1QF3 is arranged between the first bus and the second bus;

the first wire inlet switch 1QF1, the second wire inlet switch 1QF2, the third wire inlet switch 2QF1, the fourth wire inlet switch 2QF2 and the interconnection switch 1QF3 are in interlocking connection.

2. A four-wire one-contact interlocking power distribution system as in claim 1 wherein: and a push button switch disposed within the circuit.

3. A four-wire one-contact interlocking power distribution system as in claim 2 wherein: and a fuse disposed within the circuit.