CN2627698Y

CN2627698Y - Double-distribution electrical power control unit

Info

Publication number: CN2627698Y
Application number: CN 03260414
Authority: CN
Inventors: 王立斌
Original assignee: HARBIN DONGDA FANGZHENG ELECTRIC POWER CO Ltd
Current assignee: HARBIN DONGDA FANGZHENG ELECTRIC POWER CO Ltd
Priority date: 2003-08-19
Filing date: 2003-08-19
Publication date: 2004-07-21
Anticipated expiration: 2013-08-19

Abstract

The utility model relates to a double distribution power supply control device, which consists of two outdoor boxes and an indoor operation box. The two outdoor boxes are arranged with a vacuum contactor, the wiring mode of which is that two vacuum contactors are respectively connected with the high voltage side of I transformer and II transformer; the indoor operation box is connected with two outdoor boxes through the control cable; the power supplies of the low voltage sides of the I transformer and the II transformer are respectively connected with the indoor operation box; the outdoor boxes take the two vacuum contactors as the main body to control the two transformers to put into operation. The after-use effect of the utility model lies in that on one hand, after the heat-spare transformer is changed into the coldness-spare one, the transformer is totally cut from the electric network and the excitation loss of the transformer reduces to zero, which saves the electric energy; on the other hand, the insulation aging of the transformer is reduced and the service life is prolonged. The utility model mainly solves all loss of the double-power supply transformer and prolongs the service life of the transformer, which can save energy; the device is more convenient to be operated indoor, and can replace the prior manual isolation knife brake or draw-fall fuse protector with the reliable running and can supply convenience for the operation of the worker.

Description

Two distribution power controls

Affiliated field: the utility model relates to a kind of pair of distribution power control.

Background technology: the power equipment in the oil field is in service, dual transformer power supply place is many, in its running, has only a transformer-supplied operation, and another transformer is in hot stand-by duty, that is to say and be in no-load running, there is no-load loss, electric energy is wasted, in real work, no matter stand-by heat or cold standby, the switching time of transformer is almost equal, do not influence the station in work principal element, real problem is that the current mode of connection defines the switching of transformer: the switching transformer need carry out manual operation to 6 (10KV) circuit, this station in be difficult to accomplish.Therefore we develop LDH voluntarily---the two distribution power controls of 1 type.

Summary of the invention: the purpose of this utility model provides a kind of operational mode of transformer adopting cold standby, has avoided the no-load loss of transformer, two distribution power controls of saves energy fully.The purpose of this utility model realizes by following structure: the utility model is an a kind of pair of distribution power control, two outdoor casees and an in-house operation case are formed, in two outdoor casees vacuum contactor is housed, its mode of connection is: two vacuum contactors are connected on the high-pressure side of No. 1 transformer, No. 2 transformers respectively, the in-house operation case is formed and is connected by control cable with two outdoor casees, and the power supply of the low-pressure side of No. 1 transformer, No. 2 transformers is connected with the in-house operation case respectively.Outdoor case is controlled two transformers and is come into operation based on two vacuum contactors.When a transformer moved, another vacuum contactor disconnected another transformer, made it to be in cold standby state, when two transformers need exchange or work simultaneously, and can be according to indoor control cabinet operation.And according to the automatic work of controlling two transformers of deciliter state of bus connection switch.1. when bus connection switch is in the branch state: because bus connection switch is in a minute position, two transformers of the exclusive circuit of control cabinet control drop into simultaneously, also can drop into wherein any one (operating state is according to user's needs).2. when bus connection switch is in the branch state: because bus connection switch is closing the position: because bus connection switch is closing the position, two transformers of exclusive circuit control of control cabinet can not drop into simultaneously, can drop into wherein one only, prevent from that two transformers from dropping into simultaneously to cause and encircle impact 6 (10) KV circuits.3. back-up source: because the voltage of the working power of control circuit of the present utility model is 220V, mainly for when two transformers all do not drop into, the possibility of not having electricity in the transformer station and causing device to start, after transformer drops into, the automatic conversion transformer low-pressure side of power supply switch circuit in the control cabinet is the device power supply by transformer, and back-up source enters charged state.Effect after the utility model uses is: after the transformer of stand-by heat was converted to cold standby, transformer excised from electrical network fully, and the no-load loss of transformer reduces to zero, has saved electric energy.On the other hand, reduce the ageing of insulation of transformer, prolonged useful life also.The utility model has mainly solved all losses of active user's dual power supply transformer, and the useful life that has prolonged transformer, reaches purpose of energy saving; In-house operation is more convenient, has replaced in the past manually isolation switch or draws and fall the formula fuse, and is reliable, provides convenience to workman's operation.

Description of drawings:

Fig. 1 is the utility model device catenation principle figure

Fig. 2 is the utility model circuit theory diagrams

Fig. 3 is the utility model scheme of installation

Embodiment:

The utility model as shown in Figure 1 is an a kind of pair of distribution power control, two outdoor casees and an in-house operation case are formed, in two outdoor casees vacuum contactor is housed, its mode of connection is: two vacuum contactors are connected on the high-pressure side of No. 1 transformer, No. 2 transformers respectively, the in-house operation case is formed and is connected by control cable with two outdoor casees, and the power supply of the low-pressure side of No. 1 transformer, No. 2 transformers is connected with the in-house operation case respectively.

As shown in Figure 2, the in-house operation case has exclusive circuit, exclusive circuit is by control switch SA1, it is that bus connection switch deciliter state is selected that SA2 forms SA1, its deciliter is according to deciliter state of bus connection switch, SA2 is a bus connection switch when closing, select one of them input of vacuum contactor KM1 or empty contactor KM2, a bit being connected in first group of switching point of SA1 switch with the coil of vacuum contactor KM1, a bit with a bit the linking to each other of switch S A2, any and the auxiliary normally opened contact of KM1, a bit of the normally opened contact of auxiliary relay K1, a bit being connected of the normally-closed contact of auxiliary relay K1; A bit being connected of second group of switching point of SA1 switch with the coil of vacuum contactor KM2, a bit with a bit the linking to each other of switch S A2, a bit with the normally opened contact of the auxiliary normally opened contact of KM2, auxiliary relay K2 a bit, a bit being connected of the normally-closed contact of auxiliary relay K2; Any of the 3rd group of switching point of SA1 switch a bit is connected with switch S A4's, a bit with a bit being connected of the normally-closed contact of auxiliary relay K1, K2, a bit with a bit being connected of the normally-closed contact of auxiliary relay K0, first group of switching point of SA2 switch a bit with a bit being connected of the normally-closed contact of auxiliary relay K0, in addition 2 respectively with the linking to each other of two groups of switching points of SA1 switch.

The utility model main body form mainly by: two outdoor casees and an in-house operation case are formed.

In two outdoor casees vacuum contactor is housed.Its mode of connection is: two vacuum contactors are connected on the high-pressure side of No. 1 transformer, No. 2 transformers respectively.The in-house operation case is formed and is connected by control cable with two outdoor casees, and the power supply of the low-pressure side of No. 1 transformer, No. 2 transformers is connected with the in-house operation case respectively.

The utility model has been avoided rain, and bad weathers such as snow carry out the danger of outdoor operation.Outdoor case is controlled two transformers and is come into operation based on two vacuum contactors.Make it to be in cold standby state when the vacuum contactor disconnects transformer, two transformers also can be worked simultaneously.

When the user need drop into or excise operation to transformer, only need to operate, thereby avoided 10 (6) KV circuits are carried out manual operation at the indoor button of pressing.

The working method of two transformers (drop into or excision) is relevant with deciliter state of bus connection switch: if bus connection switch in a minute position, two transformers can drop into or drop into wherein any one simultaneously.If bus connection switch and the position, two transformers can only drop into wherein one, can not two drop into simultaneously.

Be illustrated in figure 3 as the utility model installation diagram.

1---the original fuse switch of user.

2---the original lead of user, transformer end of incoming cables reconfiguration is in the end of incoming cables of outdoor box again.

3---outdoor box of the present utility model, be installed on the side of electric pole, i.e. the opposite side of transformer upper fuel tank, So that connect lead (sequence number 4). The height a little more than transformer,, mounting means is looked concrete condition by the user And decide.

4---connect lead, identical with sequence number 2 leads, provided by the user.

5---the original electric pole of user.

6---low pressure 6 cores (6*1.5 square) control cable, 3 cores (3*1.5 square) shielded type cable, the one end feeds sequence number 3 bottoms, and the other end enters sequence number 9,7---user transformers by trench.

8---switchboard.

9---the indoor control box of the utility model, the installation site is determined by the user.

10---power distribution station.

11---draw power supply respectively from two transformer 220V of user.

Claims

1, a kind of pair of distribution power control, it is characterized in that: two outdoor casees and an in-house operation case are formed, in two outdoor casees vacuum contactor is housed, its mode of connection is: two vacuum contactors are connected on the high-pressure side of No. 1 transformer, No. 2 transformers respectively, the in-house operation case is formed and is connected by control cable with two outdoor casees, and the power supply of the low-pressure side of No. 1 transformer, No. 2 transformers is connected with the in-house operation case respectively.

2, a kind of pair of distribution power control according to claim 1, it is characterized in that: the in-house operation case has exclusive circuit, exclusive circuit is by control switch SA1, it is that bus connection switch deciliter state is selected that SA2 forms SA1, its deciliter is according to deciliter state of bus connection switch, SA2 is a bus connection switch when closing, select one of them input of vacuum contactor KM1 or empty contactor KM2, a bit being connected in first group of switching point of SA1 switch with the coil of vacuum contactor KM1, a bit with a bit the linking to each other of switch S A2, any and the auxiliary normally opened contact of KM1, a bit of the normally opened contact of auxiliary relay K1, a bit being connected of the normally-closed contact of auxiliary relay K1; A bit being connected of second group of switching point of SA1 switch with the coil of vacuum contactor KM2, a bit with a bit the linking to each other of switch S A2, a bit with the normally opened contact of the auxiliary normally opened contact of KM2, auxiliary relay K2 a bit, a bit being connected of the normally-closed contact of auxiliary relay K2; Any of the 3rd group of switching point of SA1 switch a bit is connected with switch S A4's, a bit with a bit being connected of the normally-closed contact of auxiliary relay K1, K2, a bit with a bit being connected of the normally-closed contact of auxiliary relay K0, first group of switching point of SA2 switch a bit with a bit being connected of the normally-closed contact of auxiliary relay K0, in addition 2 respectively with the linking to each other of two groups of switching points of SA1 switch.