CN207074378U - A kind of PLC failures based on PLC transformer cooler control systems are met an urgent need module - Google Patents

Abstract

A kind of PLC failures based on PLC transformer cooler control systems are met an urgent need module, including module major loop, input circuit and output loop；Described module major loop includes the common port XT1 being sequentially connected, put into operation the auxiliary contact of handle, auxiliary reclay KA01 normally opened contact, auxiliary reclay KP01 normally-closed contact, run indicator LR, common port XT2 and the auxiliary reclay KA02 branch road in parallel with run indicator LR, time relay KT01 branch roads, time relay KT01 timing closings contact concatenates branch road with time relay KT02 ..., and the timing closing contacts of time relay KT0n 1 concatenate branch road with time relay KT0n；Advantage is when solving PLC failures or dead electricity, the problem of cooler full cut-off, avoids the risk of transformer forced outage.

Description

A kind of PLC failures based on PLC transformer cooler control systems are met an urgent need module

Technical field

It the utility model is related to some control field, more particularly to transformer cooler control field, in particular to one kind PLC failures based on PLC transformer cooler control systems are met an urgent need module.

Background technology

With the extensive use of PLC Programmable logical controllers, transformer cooler control system is also largely controlled using PLC Device controls the operating of whole system as the core of system.Although the reliability of present PLC is very high, but still Faulty possibility, secondary circuit failure causes the possibility of its dead electricity higher, once failure, will cause cooler control system Failure, cooler full cut-off.And if important transformer upper strata oil temperature in cooler full cut-off is not up to 75 DEG C and can run one Hour, operation 20 minutes is only capable of after reaching 75 DEG C, if transformer forced outage will be caused by being unable to timely processing failure.

At present, most cooler Control System Design thinkings based on PLC are by input circuit collection main transformer operation shape The information such as state, oil temperature, bypass temperature, corresponding contact is exported after CPU internal logic computings and starts or stops cooler and sends alarm Etc. information, shortcoming is once PLC failures or dead electricity, without corresponding output, cooler is stopped, it is impossible to alarm and tripping operation. If fail to find expensive damage equipment in time.

Utility model content

The purpose of this utility model is the shortcomings that overcoming above-mentioned prior art, there is provided a kind of PLC of module and normal operation Controller output loop is in parallel, after PLC failures or dead electricity, can start cooler by module and run, recover normal in PLC The emergent module of PLC failures of automatic switchback original loop operation afterwards.

The utility model is achieved through the following technical solutions：

A kind of PLC failures based on PLC transformer cooler control systems are met an urgent need module, including module major loop, input Loop and output loop；Described module major loop include the common port XD1 being sequentially connected, the handle that puts into operation auxiliary contact, in Between relay KA01 normally opened contact, auxiliary reclay KP01 normally-closed contact, run indicator LR, common port XD2 and with fortune The auxiliary reclay KA02 branch roads of row indicator lamp LR parallel connections, time relay KT01 branch roads, time relay KT01 timing closings Contact concatenates branch road with time relay KT02 ..., and time relay KT0n-1 timing closings contact is gone here and there with time relay KT0n Connect branch road；Described common port XD1, XD2 is connected with power supply common port positive pole, negative pole respectively；Described input circuit includes becoming Depressor running status loop and PLC running statuses loop, described running state of transformer loop include the terminal being sequentially connected In XR1, auxiliary reclay KA01, terminal XR2, described terminal XR1, XR2 access transformer running monitoring loop；Described PLC running statuses loop includes being sequentially connected terminal XR3, auxiliary reclay KP01 and terminal XR4；Described terminal XR3, XR4 It is respectively connected to the PLC running statuses output cathode of PLC output modules and described power supply common port negative pole；Described output loop It is cold including first group of cooler starting-up later time, second group of cooler starting-up later time, the 3rd group of cooler starting-up later time ... N group But device starting-up later time；First group of described cooler starting-up later time is normally opened including being sequentially connected terminal XT1, auxiliary reclay KA02 Contact, terminal XT01；Described terminal XT01 is connected with described power supply common port positive pole, described terminal XT1 with it is middle after Electrical equipment KM1, normally opened contact closure corresponds to respectively after described auxiliary reclay KM1 excitations starts cooler M1；Described second Group cooler starting-up later time includes being sequentially connected terminal XT2, time relay KT01 timing closings contact, terminal XT02；It is described Terminal XT02 be connected with described power supply common port positive pole, described terminal XT2 and auxiliary reclay KM2, described centre Normally opened contact closure corresponds to respectively after relay KM2 excitations starts cooler M2；N+1 group coolers starting-up later time is included successively Connection terminal XTn, time relay KT0n-1 timing closings contact, terminal XT0n；Described terminal XT0n and described power supply Common port positive pole connects, described terminal XTn and auxiliary reclay KMn, normally opened contact after described auxiliary reclay KM2 excitations Closure corresponds to respectively starts cooler Mn.

As the improvement of such scheme, described time relay KT01, KT02, KT03 ... KT0n time delay interval is 3-10S。

As the improvement of such scheme, the auxiliary contact of the described handle that puts into operation include input state, exit state, described Input state representation auxiliary contact connect.

" put into operation handle " connects in " input " state representation Loop Contacts in major loop in such scheme, KA01 normally opened contacts Indication transformer is closed in the state of putting into operation, KP01 normally-closed contacts, which are connected, represents PLC failure, and indicator lamp branch road is used to indicate Loop is connected, and KA02 branch roads are used to start first group of cooler not being delayed, and KT01 branch roads, which are used for second group of startup, to be needed to be delayed Cooler, the branch road that KT01 timing closings contact is connected with KT02 is used to starting the cooler of the 3rd group of needs delay, and (it prolongs When be KT01 delay on the basis of be delayed again) ... the branch road that KT0n-1 timing closings contact connect with KT0n for startup n-th Group needs the cooler being delayed (it, which is delayed, is delayed again on the basis of KT0n-1 delays).Running state of transformer loop is used for Judge that transformer normally opened contact after the state of putting into operation, KA01 excitations closes.In PLC normal operations, one is taken in output module Terminal persistently exports positive electricity, makes auxiliary reclay KA01 excitations, and KA01 normally-closed contacts are maintained at open mode；Once PLC failures Or dead electricity, output module can not export positive electricity, KA01 losss of excitation, KA01 normally-closed contacts are maintained at closure state.

The utility model has the advantages that：

When the 1st, solving PLC failures or dead electricity, the problem of cooler full cut-off, the risk of transformer forced outage is avoided.

2nd, modularization, it is simple in construction, make to install and use more convenient, simple operation.

3rd, cost is low：The redundancy of PLC control system or handoff functionality, this programme are realized relative to one CPU of increase Reduce improvement expenses and workload.

Brief description of the drawings

Fig. 1 is the structural representation of the emergent module of PLC failures of the present utility model.

Fig. 2 is the using state structure diagram of the emergent module of PLC failures of the present utility model.

Embodiment

Embodiment

As shown in Figure 1 and Figure 2, the emergent module of a kind of PLC failures based on PLC transformer cooler control systems, including mould Block major loop, input circuit and output loop；Described module major loop include be sequentially connected common port XD1, put into operation handle Auxiliary contact, auxiliary reclay KA01 normally opened contact, auxiliary reclay KP01 normally-closed contact, run indicator LR, public affairs XD2 and the auxiliary reclay KA02 branch road in parallel with run indicator LR, time relay KT01 branch roads, the time relay are held altogether KT01 timing closings contact concatenates branch road with time relay KT02 ... time relay KT0n-1 timing closings contact and time Relay KT0n concatenates branch road；Described common port XD1, XD2 power supply common port positive pole, negative poles with PLC control system respectively Connection；Described input circuit includes running state of transformer loop and PLC running statuses loop, described transformer station high-voltage side bus shape State loop includes the terminal XR1, auxiliary reclay KA01, terminal XR2, described terminal XR1, XR2 access transformation being sequentially connected In device operation monitoring loop；Described PLC running statuses loop includes being sequentially connected terminal XR3, auxiliary reclay KP01 and end Sub- XR4；Described terminal XR3, XR4 is respectively connected to the PLC running statuses output cathode and described power supply public affairs of PLC output modules Negative pole is held altogether；Described output loop include first group of cooler starting-up later time, second group of cooler starting-up later time, the 3rd group it is cold But device starting-up later time ... N groups cooler starting-up later time；First group of described cooler starting-up later time includes being sequentially connected terminal XT1, auxiliary reclay KA02 normally opened contacts, terminal XT01；Described terminal XT01 is connected with described power supply common port positive pole, Described terminal XT1 and auxiliary reclay KM1, normally opened contact closure corresponds to respectively after described auxiliary reclay KM1 excitations opens Dynamic cooler M1；Second group of described cooler starting-up later time closes including being sequentially connected terminal XT2, the time relay KT01 delay Conjunction contact, terminal XT02；Described terminal XT02 is connected with described power supply common port positive pole, described terminal XT2 and centre Relay KM2, normally opened contact closure corresponds to respectively after described auxiliary reclay KM2 excitations starts cooler M2；N+1 groups are cold But device starting-up later time includes being sequentially connected terminal XTn, time relay KT0n-1 timing closings contact, terminal XT0n；Described Terminal XT0n is connected with described power supply common port positive pole, described terminal XTn and auxiliary reclay KMn, described centre after Normally opened contact closure corresponds to respectively after electrical equipment KMn excitations starts cooler Mn.Described time relay KT01, KT02, KT03 ... KT0n time delay interval is 3-10S.The auxiliary contact of the described handle that puts into operation include input state, exit state, Described input state representation auxiliary contact are connected.

Above-listed detailed description is illustrating for the utility model possible embodiments, and the embodiment simultaneously is not used to limit The scope of the claims of the present utility model, all equivalence enforcements or change without departing from carried out by the utility model, it is intended to be limited solely by this case In the scope of the claims.

Claims (3)

1. The module 1. a kind of PLC failures based on PLC transformer cooler control systems are met an urgent need, it is characterised in that including module master Loop, input circuit and output loop；Described module major loop include the common port XD1 being sequentially connected, the handle that puts into operation it is auxiliary Help contact, auxiliary reclay KA01 normally opened contact, auxiliary reclay KP01 normally-closed contact, run indicator LR, common port XD2 and the auxiliary reclay KA02 branch road in parallel with run indicator LR, time relay KT01 branch roads, time relay KT01 Timing closing contact concatenates branch road with time relay KT02 ... time relay KT0n-1 timing closings contact and time relay Device KT0n concatenates branch road；Described common port XD1, XD2 is connected with power supply common port positive pole, negative pole respectively；

   Described input circuit includes running state of transformer loop and PLC running statuses loop, described transformer station high-voltage side bus shape State loop includes the terminal XR1, auxiliary reclay KA01, terminal XR2, described terminal XR1, XR2 access transformation being sequentially connected In device operation monitoring loop；Described PLC running statuses loop includes being sequentially connected terminal XR3, auxiliary reclay KP01 and end Sub- XR4；Described terminal XR3, XR4 is respectively connected to the PLC running statuses output cathode and described power supply public affairs of PLC output modules Negative pole is held altogether；

   Described output loop includes first group of cooler starting-up later time, second group of cooler starting-up later time, the 3rd group of cooler Starting-up later time ... N group cooler starting-up later times；First group of described cooler starting-up later time include be sequentially connected terminal XT1, Auxiliary reclay KA02 normally opened contacts, terminal XT01；Described terminal XT01 is connected with described power supply common port positive pole, described Terminal XT1 and auxiliary reclay KM1, after described auxiliary reclay KM1 excitations normally opened contact closure correspond to respectively start it is cold But device M1；Second group of described cooler starting-up later time is including being sequentially connected terminal XT2, time relay KT01 timing closings are touched Point, terminal XT02；Described terminal XT02 is connected with described power supply common port positive pole, described terminal XT2 and middle relay Device KM2, normally opened contact closure corresponds to respectively after described auxiliary reclay KM2 excitations starts cooler M2；N+1 group coolers Starting-up later time includes being sequentially connected terminal XTn, time relay KT0n-1 timing closings contact, terminal XT0n；Described terminal XT0n is connected with described power supply common port positive pole, described terminal XTn and auxiliary reclay KMn, described auxiliary reclay Normally opened contact closure corresponds to respectively after KMn excitations starts cooler Mn.
2. The module 2. a kind of PLC failures based on PLC transformer cooler control systems according to claim 1 are met an urgent need, its Be characterised by, described time relay KT01, KT02, KT03 ... KT0n time delay interval is 3-10S.
3. The module 3. a kind of PLC failures based on PLC transformer cooler control systems according to claim 1 are met an urgent need, its It is characterised by, the auxiliary contact of the described handle that puts into operation include input state, exit state, described input state representation auxiliary Contacting.