JPH0122368Y2 - - Google Patents

Description

[Detailed description of the invention] The invention has a storage battery B that is charged in a charging circuit C connected to a commercial power source E, and is connected to the commercial power source E via the normally closed side a of the switching contact of the auxiliary relay R _Y. Connect the power failure detection relay R _S , and connect the timer relay R _T for setting the inspection time to the commercial power supply E via the normally open side b of the above switching contact _. Magnetic relay operated R _M
A load Z is connected in parallel to the storage battery B through the normally open contact i of the storage battery B, and a constant voltage relay R _Z for monitoring the voltage of the storage battery B, which operates at a voltage exceeding a specified voltage, is connected to the storage battery B.
A series circuit consisting of a reset switch S _R , a battery charge status check switch S _S , a normally closed time limit contact d of the timer relay R _T , and an auxiliary relay R _Y is connected in parallel to a storage battery B, A series circuit of normally open contact c of _Y and normally open contact e of timer relay R _T is connected in parallel to the battery charging state check switch S _S ,
A series circuit consisting of the normally closed contact g of the constant voltage relay R _Z for monitoring the storage battery B voltage and another auxiliary relay R _X is connected in parallel to _the auxiliary relay R _Y. Insert the normally open contact _h of another _auxiliary relay R _X between the joint between the closed contact _g and another auxiliary relay R The purpose of this device is to prevent the device from operating even if the battery charge status check switch is activated when the input voltage to the device is not applied due to a power outage or non-wiring. To provide a compact DC power supply device that can check the state of charge of a storage battery, etc. by operating the device only when the input voltage is applied and not operating, and can accurately check the state of charge of a storage battery, etc. There is something to do.

The present invention will be explained in detail with reference to the drawings. The attached figure shows an example of a circuit for implementing the present invention. E is a commercial power source, and the commercial power source E is connected in parallel with the primary winding of a power transformer T via a power breaker B _E. A rectifier D is connected to the secondary winding of this power transformer T.
A charging circuit C consisting of a constant voltage charging circuit section and a display circuit section is connected in parallel, and this charging circuit C charges the storage battery B via the output breaker B _O. In addition, a power breaker B _E is connected to the commercial power source E.
The normally closed side a of the switching contact of the auxiliary relay R _Y is on the output side of
A power failure detection relay R _S is connected in parallel with the relay R _S for detecting a power failure, and a timer relay R _T for setting an inspection time is further connected in parallel with the normally open side b of the switching contact of the auxiliary relay R Y. On the other hand, the storage battery B has a series circuit consisting of a reset switch S _R in a normally closed state, a battery charging state inspection switch S _S in a normally open state, a normally closed time limit contact d of a timer relay R _T , and an auxiliary relay R _Y. The normally closed contact f of the power failure detection relay R _S , the series circuit of the magnetic relay R _M , and the constant voltage relay R _Z for monitoring the voltage of the storage battery B are connected in parallel. Furthermore, another normally open contact c of the auxiliary relay R _Y and the timer relay
The series circuit with the normally open contact e of R _T is connected in parallel to the battery charge status check switch S _S , and the auxiliary relay R _Y has a light emitting diode for inspection display.
IED ₁ is connected in parallel. Further, a series circuit of the normally closed contact _g of _the constant voltage relay R _Z for monitoring the storage battery B voltage and another auxiliary relay _R is connected in parallel to _the above-mentioned _another auxiliary _{relay R} A normally open contact h of another auxiliary relay R _X is inserted between them. By the way, a load Z such as an emergency light is a load breaker B _Z
The normally open contact i of the magnetic relay _RM is inserted in series between the storage battery B and the load breaker _BZ . still,
The normally closed time limit contact d of the above timer relay _RT becomes normally closed when the timer relay _RT is set.
Normally open contact e of timer relay R _T is timer relay R _T
The constant voltage relay R _Z for monitoring battery B voltage is in the closed state only when the excitation current is flowing through the
18.6V) or less, the former normally closed contact g remains closed, the latter normally open contact i remains open, and when a certain voltage or more is applied, the respective relays R _Z , R _T is energized to maintain the respective contacts g and i in the open and closed states.

When the commercial power supply E is applied to the primary side of the power transformer T via the power supply breaker B _E , voltage is supplied to the charging circuit C via the rectifier D and the storage battery B is charged while the voltage of the storage battery B is monitored. A predetermined voltage is also applied to the constant voltage relay _RZ , the constant voltage relay _RZ is also excited, and its normally closed contact g is opened.
At the same time, the power failure detection relay R _S is also energized, its normally closed contact f is opened, and the magnetic relay is activated.
Since R _M is de-energized and the normally open contact i of the magnetic relay R _Z is open, power is not supplied to the load Z and the charging circuit C only charges the storage battery B via the output breaker B _O. The state of charge of storage battery B is determined by checking whether or not normal discharging occurs from charging circuit B for a predetermined period of time stipulated by law.
This is done by checking the voltage, and the predetermined time is the time during which the voltage must be maintained at a predetermined value or higher even if the storage battery B discharges and causes a voltage drop.
In this embodiment, it is performed as follows. That is, after keeping the charged state of storage battery B as described above for a sufficiently long time,
The timer relay R _T is set for a predetermined time, the normally closed time limit contact d is kept closed for a predetermined time, and then the battery charging state check switch S _S is closed. Then, the auxiliary relay R _Y is energized and the normally open contacts b and c are connected to each other.
is closed and the inspection display light emitting diode IED ₁ is lit, while the timer relay _RT is energized and the normally open contact e of the timer relay _RT is abruptly closed.
At the same time, power failure detection relay R _S becomes de-energized and its normally closed contact f closes, and therefore magnetic relay R _M also becomes energized and its normally open contact i closes, acting as an emergency light. Light up load Z. That is,
In this embodiment, if the commercial power source E is applied, the return spring built into the battery charging state check switch _{S S causes} the auxiliary relay _R Open contact c and normally open contact e of timer relay _RT continue to remain closed,
Reset switch S _R → Normally open contact c → Normally open contact e →
Since the excitation current continues to flow through the normally closed contact d and the auxiliary relay R _Y , the inspection display light emitting diode IED ₁ and the load Z, such as an emergency light, continue to light up. If the voltage of storage battery B does not fall below a certain voltage (18.6V) even after the predetermined time set in timer relay R _T has elapsed, normally closed time-limit contact d opens after the predetermined time of timer relay R _T has elapsed, and an inspection display is displayed. Light emitting diode LED for ₁
goes out, and the auxiliary relay R _Y is de-energized and the storage battery B returns to its charged state. Conversely, if the voltage of storage battery B falls below 18.6V within the time set in timer relay R _T , constant voltage relay R _Z for monitoring storage battery B becomes de-energized and its normally closed contact g
closes, _{another auxiliary} relay _R Even if the time limit contact d is opened, the lighting state continues. Also, at this time, the applied voltage of magnetic relay R _M becomes 18.6 V or less, and its normally open contact i opens, causing a load Z such as an emergency light to close.
The lights also go out. And reset switch
When S _R is opened, storage battery B abnormality display light emitting diode LED ₂ goes out.

Now, if commercial power source E is not applied due to an accident such as a power outage, and if timer relay R _T is set by mistake and battery charging status check switch S _S is closed, then auxiliary relay R _Y is energized and its normally open contacts b and c are closed, but no excitation current flows through timer relay R _T and normally open contact e of timer relay R _T remains open, so the battery is in a charged state. When the inspection switch S _S returns to the open state, the auxiliary relay R _Y becomes de-energized, and no operation is performed to check the state of charge of the storage battery B.

Therefore, the present invention has a storage battery that is charged by a charging circuit connected to a commercial power source, and a power failure detection relay is connected to the commercial power source via the normally closed side of the switching contact of the auxiliary relay, and inspection A timer relay for time setting is connected to the commercial power supply via the normally open side of the above switching contact, and a load is connected in parallel to the storage battery via the normally open contact of the magnetic relay, which is activated by the above power failure detection relay in the event of a power outage. A constant voltage relay for monitoring storage battery voltage that operates at a voltage exceeding a predetermined voltage is connected in parallel to the storage battery, and a reset switch, a switch for checking the battery state of charge, a normally closed time limit contact of the timer relay, and an auxiliary relay are connected in series. The circuit is connected in parallel to the storage battery, and the series circuit of the normally open contact of the auxiliary relay and the normally open contact of the timer relay is connected in parallel to the battery charging status check switch, and the normally closed contact of the constant voltage relay for monitoring the storage battery voltage is The series circuit with the auxiliary relay is connected in parallel with the auxiliary relay, and the junction between the normally closed contact of the constant voltage relay for monitoring storage battery voltage and another auxiliary relay, and the junction between the reset switch and the battery charge state check switch. Since the normally open contact of another auxiliary relay is inserted between the two, the power failure detection relay can detect power outages and non-power outages, and in the event of non-power outages, the charging circuit can always charge the storage battery, preventing power outages. It has the advantage that the normally closed contact of the power failure detection relay can sometimes be used to operate the magnetic relay to connect a storage battery and a load such as an emergency light to operate the load. By checking the state of charge of the storage battery, you can check whether the storage battery is discharging normally during a power outage. First, it has the advantage of being able to accurately check the battery state of charge.

[Brief explanation of the drawing]

The attached diagram is an example of a circuit for implementing the present invention. E is a commercial power supply, C is a charging circuit, B is a storage battery, R _Y is an auxiliary relay, and a and b are the normally closed side or normally open side of the switching point of the above relay. , c is the normally open contact of the above relay, R _S is the power failure detection relay, f is the normally closed switching contact of the above relay R _T is the timer relay, d is the normally closed time contact of the above relay, and e is the normally closed contact of the above relay. Normally open contact, R _M is magnetic relay, i is normally open contact of the above relay,
R _Z is a constant voltage relay for monitoring battery voltage, g is a normally closed contact of the above relay, R _X is another auxiliary relay, h is a normally open contact of the above relay, S _R is a reset switch,
S _S indicates a switch for checking battery charging status.

Claims (1)

[Scope of utility model registration request] It has a storage battery that is charged by a charging circuit connected to a commercial power source, a power failure detection relay is connected to the commercial power source via the normally closed side of the switching contact of the auxiliary relay, and a timer relay for setting the inspection time is connected to the commercial power source. It is connected to the commercial power supply through the normally open side of the switching contact, and in the event of a power outage, the load is connected in parallel to the storage battery through the normally open contact of the magnetic relay, which is operated by the power failure detection relay, and the voltage exceeds a specified voltage. A constant voltage relay for monitoring the voltage of a storage battery that operates at the same voltage is connected in parallel to the storage battery, and a series circuit consisting of a reset switch, a switch for checking the battery state of charge, a normally closed time limit contact of the timer relay, and an auxiliary relay is connected in parallel to the storage battery. , connect the series circuit of the normally open contact of the auxiliary relay and the normally open contact of the timer relay in parallel to the above-mentioned battery charging status check switch, and connect the normally closed contact of the constant voltage relay for storage battery voltage monitoring to the series circuit of the normally open contact of the storage battery voltage monitor and another auxiliary relay. Another auxiliary relay is connected in parallel to the auxiliary relay, and is connected between the junction between the normally closed contact of the constant voltage relay for monitoring storage battery voltage and another auxiliary relay, and the junction between the reset switch and the switch for checking the battery state of charge. A small DC power supply device consisting of a normally open contact of a relay.