JPS5832467Y2 - Self-check circuit for automatic startup board for engine generator - Google Patents

Description

[Detailed description of the invention] This invention relates to a self-check circuit for an automatic starting board for an engine generator, which can check the quality of the engine starting board without starting the engine.

Conventionally, engine generators, which are used during power outages, need to be regularly inspected to ensure that they always operate normally even in the event of an unexpected power outage, but with conventional automatic start panels, it is necessary to check the generator by actually starting the engine. It is necessary to check whether the circuit is working properly, which has the disadvantage that inspection work is complicated.

This invention was made for the purpose of eliminating such drawbacks, and it provides a self-check circuit for an automatic starting board for engine generators that allows checking the quality of the starting board without starting the engine, thereby simplifying inspection work. It was designed to be easy to do.

This invention will be described in detail below with reference to an illustrated embodiment.

The drawing shows a starting circuit that constitutes an automatic starting panel for a generator engine (not shown). The normally closed contact 5s-ic of the switch SS is connected in series with the normally closed contact +13-i of the auxiliary relay +B and the auxiliary relay +A between the lines P and N, and the normally open contact 88-2Kl of the selector switch SS.
d. The normally closed contact ΦA-1 of the auxiliary relay ΦA and the auxiliary relay ΦB are connected in series between each line P and N.

+Cr: i A timer for power failure confirmation, connected in series with the normally open contact ΦI-1 of the auxiliary relay for interlock (not shown), and via the normally open contact +A-2 of the 1-N and auxiliary relay #A. It is provided between the line V connected between the auxiliary relay +A and the normally closed contact +B-1, and the contact of the timer +C +C-1id, the normally closed contact +J-1 of the interlock auxiliary relay (not shown), It is connected in series with +, -1, +L-1 and starting auxiliary relay ΦD, and is provided between lines P' and N.

Also, contact +C-1 of timer +C and normally closed contact Φ of auxiliary relay
between J-1 and the above auxiliary relay +B and normally closed contact +A-1
Between line P// K[, start pushbutton switch P connected via normally open contact #B-2 of auxiliary relay "1!'B
S and the normally open contact "B-3" of the auxiliary relay ΦB are connected in series, and the contact #C- of the timer +C is connected in series.
1 and the normally closed contact J-1 of the auxiliary relay and the line P are connected in series to the normally open contact DD1 of the starting auxiliary relay +D. A normally open contact +F-1 and a normally closed contact +G-1 are provided for the check auxiliary relays +F and ΦG, which constitute the auxiliary check relay #G, and a normally open contact +G-2 of the check auxiliary relay #G is provided in parallel with this series circuit. is connected.

Ota ΦE is the engine starting auxiliary relay that should be checked in the above check circuit, the normally closed contact "ll" M-1 of the checking auxiliary relay +M and the normally open contact #D of the starting auxiliary relay +D.
-2 is connected in series with Rhino P and N, and the normally open contact of the above-mentioned check auxiliary relay +A is the normally open contact of the auxiliary relay +A, and the normally closed contact of the starting auxiliary relay +D. +D-3, the normally closed contact #E- of the engine starting auxiliary relay +E (and the normally open contact #D-4 of the starting auxiliary relay +D are connected in series, and the line P.

It is provided between N.

Normally open contact #A-3 of the above series circuit is connected to normally open contact +B-4 of auxiliary relay 4PB, and normally closed contacts +D-3 and +E-
IK [Normally open contact ΦF-2 of check auxiliary relay #F is
The normally closed contact +rD-4K of the starting auxiliary relay +D, the normally closed contact +E-2 of the engine starting auxiliary relay ΦE, and the normally closed contact +G-3 of the checking auxiliary relay +G are connected in parallel.

One side check auxiliary relay ΦGd check auxiliary relay +H
The normally closed contact ΦH-1 of the check relay 41=F and the normally open contacts ΦF-3, 4PG-4 of #G are connected in parallel to the circuit vci column, and the line N and the above-mentioned normally open contact ΦA- 3 and the normally closed contact ΦD-3, and in parallel with this circuit, the normally open contact +D-5 of the check auxiliary relay +H and the starting auxiliary relay +D, and the normally open contact +D-5 of the engine starting auxiliary relay +E. Open contact +E-3, normally closed contact 4PF-4 of check auxiliary relay ΦF, and check auxiliary relay #
A series circuit consisting of the normally open contact of G + G-5 is connected in parallel with the normally open contact of check auxiliary relay + normally open contact #H of H.
-2 is connected, and the check auxiliary relay +H
An indicator light SL for indicating quality is connected in parallel with ILri.

And normally open contact #F-5 of the above check auxiliary relay +F
The normally closed contact ΦG-6 of #G and the normally open contact #E-4 of the engine starting auxiliary relay #E are connected in series to an engine starting circuit (not shown).

However, when the selector switch SS is switched from the automatic position to the manual position in order to check the automatic start panel for the engine generator (not shown), the normally closed contact 5s-1 of the selector switch SS in the first row turns OFF and the auxiliary Lillet+A is OF
F, and at this time it is 1. Since the normally open contact 88-2UONt of the selector switch SS is not open, the auxiliary relay +B is also OFF.
Furthermore, check auxiliary relays #F, +G, ΦH and indicator light SL are also OFF, and since the engine is not started, also turn OFF the timer #C5 starting auxiliary relay +D and engine starting auxiliary relay ΦE. .

Next, when the normally open contact 5S-2 of the selector switch SS is turned ON, the auxiliary relay 4FB is turned ON, and the normally open contacts +B-2 and ``B4'' of the 4th and 14th columns are both ONL, 13th row and 14th column. The check auxiliary relay #F is turned ON and self-maintained through the normally closed contacts +D-3, +E-1, +D-4 of the starting auxiliary relays ΦD and +E in the row.

Due to the self-holding of the auxiliary check relay #F, the normally open contact ΦF-3 in the 15th row is turned ON, and the auxiliary check relay #G is turned ON via the normally closed contact ΦH-1 of the auxiliary check relay +H. Be self-reliant.

Due to this self-holding of the check auxiliary relay ΦG, the normally open contact 4PG-2 of 9/11 is turned ON, and the interlock auxiliary relay (not shown) which is OFF when the engine is stopped.
J or +L normally closed contact ΦJ -1, 4PK-1.

The starting auxiliary relay +D is turned on via +L-1, and as a result, the normally open contact +D-2 in the first O row is turned on, and the engine starting auxiliary relay ΦE is turned on.

13th by turning on the above-mentioned engine starting aid +E.
．． Normally closed contact +E-1゜+E-2゜OF
F, and the check auxiliary relay + F turns OFF.
Normally open contacts +D-5, ΦE-3 in the 17th row, normally closed contacts ΦF-4 of check auxiliary relay #F, and normally open contacts +G-5 of check auxiliary relay +G are turned on, and the check auxiliary relay +HLriON and be self-retaining.

At the same time, the indicator light SL should be lit.

While the above indicator light SL is on, the check auxiliary relay #H is self-held, and the normally closed contact #Hl in the 5th row is turned OFF, and the check auxiliary relay +G is turned OFF → the engine starting auxiliary relay #H is turned OFF. is OFF → The engine starting auxiliary relay + is OFF, and the normally closed contact +D in the 13th and 14th rows is turned OFF.
3. +D-4. +E-2 is ONL, and the check auxiliary relay ΦF is self-held.

The indicator light SL, which was lit at 1 due to nl/C, goes out once due to the switching of the selector switch SS, and then neglects due to the self-holding of the check auxiliary relay +H, so the indicator light 5Lr1 turns on → goes out → Flashes in the order of lighting.

Indicates that there is no abnormality in the circuit. If this flashes outside of the above range, for example, if the tail does not light up at all, then the starting auxiliary relay + D and engine starting auxiliary relay + El or the check circuit (inside the frame line of the drawing) necessary for starting the engine are detected. Since it is defective, these relays and circuits need to be inspected and repaired.

In other words, the circuit can be inspected without starting the engine.

If there is no abnormality in the circuit, set the selector switch SSf/Auto and press the button.

This allows the auxiliary relay +E to start the engine in the event of a power outage, etc.
The starting auxiliary relay ΦD and the checking auxiliary relay +F act as axes, and the normally open contacts #E-4 and Relay +G of the engine starting auxiliary relay +E are connected in series to the engine starting circuit.
A starting signal is output to the engine through the normally closed contact ΦG-6 of the relay +F and the normally open contact ΦF-5 of the relay +F, and the engine is automatically started.

In addition, even if the engine does not start during a power outage, if you switch the selector switch SS from the automatic side to the manual side,
The indicator light SL blinks due to the function of the self-check circuit described above, and the operation of the engine starting relay #E can be checked.

In other words, if the indicator light SL turns on → goes out for one breath, the engine starting relay +E is normal, so the reason why the engine does not start is on the engine side, and if the indicator light SL goes out, it will start automatically. Since it can be determined that the cause of the failure is on the panel side, it is possible to take immediate action.

On the other hand, when the select switch SS is changed from manual 7Jh to automatic, the normally open contacts of the select switches S and S become FF and the second row The auxiliary relay fB is turned OFF, and the auxiliary relay +A in the first column also becomes Ql·F.

(At this time, select switch SSM') Normally closed contact 5S
-1 is not ON) Next, select switch S S OJ normally closed class point SSt is O
When it is N, auxiliary relay #A is turned on and the 3rd
The normally open contacts +A-2 and +A-3 of the tears are turned ON, and from then on, the 12th. i 4th row normally closed contact ΦD-3. Fyo D-2
, ΦE-2 are ONL, and the check auxiliary relay #F is self-holding.

Due to the self-holding of the auxiliary check relay +F, the normally open contact ΦF-3 in the 15th row turns ON, and the auxiliary check relay +
G turns ON and is self-maintained.

Due to this self-holding of the check auxiliary relay +G, the normally open contact ΦG-2 of the 9-day relay is turned ON, and the interlock auxiliary relay #J (not shown) is turned OFF when the engine is stopped.
The starting auxiliary relay #D75IJ)N is connected to the normally closed contacts ΦJ-1, + of #L through 11L-1, and thereby the normally open contact ``ll'D-2 of the 10th night 1 tears is turned ON. The engine starting auxiliary relay +E turns on.

13th from the ONK of the engine starting auxiliary relay ΦE.
On the 14th, the normally closed contacts ΦE-t and +E-2 of 1 tears turn OFF, and the check auxiliary relay +F turns OFF, and the normally open contact +D-5゜ΦE-3 in the 17th row, the check auxiliary relay # Normally closed contact of F + F-4. Chi 4. The normally open contact +G-5 of the check +Q turns ON, and the auxiliary check relay #H
Be self-reliant by riON.

At the same time, the indicator light SL is lit.

While the above indicator light SL is on, the normally closed contact #H-1 of the 15th evening I tears is turned OFF due to the self-holding of the check auxiliary relay +H.
F, the check auxiliary IJLJG is OFF → the engine starting auxiliary relay ΦD is OFF → the engine starting auxiliary relay Φ is OFF, and the normally closed contact in the 13th and 14th rows +
D-3, '#D-4, +E-2 are ONL, and the check auxiliary relay ΦF is self-held.

As a result, the indicator light SL, which was lit in one turn, will be turned off once by switching the selector switch SS, and then will be lit by the self-holding of the check auxiliary relay +H, so the indicator light 5Lri will turn on → go out → light up in the order It flashes to indicate that there is no abnormality in the circuit.

If there is no flashing other than this, for example, if there is no tail light or the light does not light at all, it is because the starting auxiliary relay ΦD and engine starting auxiliary relay +E necessary for starting the engine or the check circuit (within the frame of the drawing) are defective. , it is necessary to inspect and repair these relays and circuits.

In other words, the circuit can be inspected without starting the engine, similar to when switching from automatic to manual mode.

As described in detail above, this idea is based on the automatic start panel, which can be activated by simply operating the select switch from automatic to manual or vice versa without starting the engine of the engine generator, regardless of whether or not the circuit is checked. Since the engine start circuit can be checked automatically, inspection work can be done quickly and easily.

In particular, if you install a self-check circuit so that the engine is always ready to start, you will be able to avoid situations such as the engine not starting in the event of a power outage. In addition to preventing the risk of a catastrophic failure due to failure to use the engine, if the engine does not start in the event of a power outage, a self-check circuit can be installed by switching the selector switch from the automatic side to the manual side. The operation of the engine starting auxiliary relay can be confirmed by the flashing indicator light.

In other words, if the indicator light flashes, the cause of the failure is on the engine side, and if the indicator light continues, the cause of the failure is on the automatic start panel side, so the cause of the failure can be quickly discovered and disasters can be minimized. If adopted as an emergency engine generator, it would be extremely effective.

[Brief explanation of drawings]

The drawing is a circuit diagram showing one embodiment of this invention. A to H1d auxiliary relay, SSa selector switch, S
L' is an indicator light.

Claims (1)

[Scope of utility model registration request] An engine starting selector switch SS that selects the engine starting method, an auxiliary relay ΦA that is turned on when the selector switch SS is switched to the automatic side, and the selector switch S
Auxiliary relay ΦB that is turned on when S is switched to manual side, tire #C for power failure confirmation that is turned on at the time of power outage and turned off after a certain period of time, timer contact +C-1 and interlock auxiliary relay ΦJ when the above-mentioned timer +C is turned on. , +, auxiliary starting relay #D is turned on via the normally closed contacts ΦJ-1, Φ-1, +L-1 of ``L, and the auxiliary starting relay #D is turned on when the auxiliary starting relay +D is turned on, and the engine is started. An automatic start board consisting of an auxiliary relay #E for starting the engine is installed, and when the selector switch SS is switched, the normally open contact #A-3 of the auxiliary relay #A (or the normally open contact of the auxiliary relay ΦB) is switched. +13
-4) and normally closed contacts of starting auxiliary relays #D and +E +D-
3°+D-4. The check auxiliary relay ffF is turned on via +E-1, the normally open contact of the check auxiliary relay #F, the normally closed contact of the check auxiliary relay #F, and the normally closed contact of the check auxiliary relay H.
-1, and the above-mentioned check auxiliary relay #
Normally open contact +G- connected in parallel with F normally open contact #F-3
4, a normally open contact +G-2 connected to the relay +DK in order to turn on the starting auxiliary relay ΦD when the checking auxiliary relay #G is turned on, and the normally open contact +G-2, which is connected to the starting auxiliary relay Normally open contact of auxiliary relay #D +D-
5. It is turned on via the normally open contact +E-3 of the starting auxiliary relay #E, the normally closed contact ΦF-4 of the check auxiliary relay ΦF, and the normally open contact #G-5 of the check auxiliary relay #G, and By turning on the normally open contact #H-2 of the check auxiliary relay +H, which is self-held by the normally open contact ΦH-2 connected in parallel with these contacts "D-5゜+E-3, +F-4, +G-5" A self-check circuit for an automatic starting board for an engine generator, which is equipped with an indicator light SL that should be lit.