JP5599066B2 - Distribution board with current management function - Google Patents

Description

  The present invention relates to a distribution board with a current management function suitable for an apartment house such as an apartment.

When a power system that supplies power to an apartment house such as a condominium fails, it is normal that all power sources of each dwelling unit cannot be used. In this state, security devices such as fire alarms will not function. For this reason, as shown in Patent Document 1, it has been proposed to provide a storage battery inside the distribution board of each dwelling unit to ensure the power supply of the fire alarm even when a power failure occurs.
However, power is supplied only to a specific load (fire alarm) inside the distribution board, and power cannot be supplied to other loads. Moreover, when a power outage lasts for a long time and the load is large, it is not possible to secure power for a long time.

  In addition, in recent years, collective power is received in apartment buildings such as condominiums, and an emergency power supply is installed in the common area in preparation for a power outage. It is considered to continue power supply including each dwelling unit which is a dedicated section.

  Examples of the emergency power source include a storage battery and a diesel generator. In order to supply all the loads of each dwelling unit at the time of a power failure, a large facility is required. In addition, the storage battery has a battery capacity, and the D-cell generator has a fuel limitation, so it cannot continue to supply power to each dwelling unit for a long time. For this reason, there is no problem when the power is restored in a short time, but if the power failure lasts for a long time, the power supply from the emergency power supply is also stopped, and there is a possibility that safety cannot be ensured. In addition, in order to stably supply power to all dwelling units over a long period of time, a large-capacity emergency power supply is required, and there is a problem that equipment costs and maintenance costs are also expensive.

JP 2000-287315 A

  Therefore, the object of the present invention is to solve the above-mentioned conventional problems, and supply power to a necessary specific load even in the event of a power failure while stopping power supply to a general load other than the specific load. The purpose is to provide a distribution board with a current management function that can continue to supply power from an emergency power supply to a specific load even for a long time.

The present invention, on the secondary side of the main breaker of emergency power supply is connected to the connected trunk, a general circuit switching device having a switching control section which is opened and closed controlled by the power failure power recovery signal input from the outside And a branch circuit is provided on the secondary side of the general circuit switch, an emergency circuit is connected in parallel with the general circuit switch, and a battery for driving is connected to the general circuit switch. When the power is restored, the switching control unit confirms that the amount of charge of the battery has reached a predetermined level and then causes the general circuit switch to perform a closing operation .

  The present invention is a distribution board with a current management function described above, wherein a main circuit breaker is arranged in a space on one side of a branch circuit in the distribution board housing with a current management function described above, and a general circuit is arranged in a space on the opposite side. It is characterized by arranging a switch for use.

  The present invention is a distribution board with a current management function described above, wherein the general circuit switch described above is a latch relay having a self-holding function.

  In the distribution board with current management function of the present invention, when a power failure signal is input from the outside, the switching control unit turns off the general circuit switch and power is supplied to the branch circuit connected to the secondary side. Do not. On the other hand, the emergency circuit connected in parallel with the general circuit switch can be supplied with power from the emergency power supply. Therefore, the capacity of the emergency circuit should be set sufficiently smaller than the rated capacity of the main breaker. As a result, the capacity of the emergency power supply can be reduced, and the power supply from the emergency power supply to the specific load can be continued for a long time. For this reason, even when a power failure lasts for a long time, it is possible to secure the minimum necessary power for a long time.

Further, since the switching control section in the power recovery is assumed to charge amount of the battery for driving perform closing operation generally the circuit switching device after confirming that has reached a predetermined level, and a power failure then again Even in this case, the general circuit switch can be reliably turned off by the battery power.

  Also, if the main circuit breaker is arranged in the space on one side of the branch circuit in the distribution board housing and the general circuit switch is arranged in the space on the opposite side, the general circuit switch is installed in the existing distribution board. Since the wiring from the general circuit switch to the bus bar is easy when the is installed, it is easy to modify the distribution board with a current management function.

It is a whole explanatory view of a feed system provided with an emergency power supply. It is explanatory drawing of the distribution board with a current management function of this invention. It is the whole electric power feeding system at the time of a power failure. It is the whole electric power feeding system at the time of power recovery.

Hereinafter, preferred embodiments of the present invention will be described.
FIG. 1 is a diagram illustrating an entire power supply system installed in an apartment house such as a condominium. In collective housing, there are cases where the management company contracts the power in a lump and supplies power to each dwelling unit. In FIG. 1, a branch line 1 of a high-voltage electric wire of a power system is drawn through a transformer 2 and connected to a main line 4 via a main line switch 3 of an apartment house. The main line 4 is branched into a plurality of branches to supply power to each dwelling unit and stored in the main distribution board 19, and the distribution board 18 with a current management function of the present invention is arranged in each dwelling unit.

  In this embodiment, in addition to the emergency power source 5, a gas cogeneration device 6, a solar power generation device 7, and the like are connected in parallel to the main line 4. The emergency power source 5 is composed of a storage battery 8 and a fuel cell 9, and is installed in a common part in common with each dwelling unit. As the storage battery 8, for example, a lithium ion battery or a NaS battery for power storage using sodium and sulfur as active materials can be used. The fuel cell 9 is a power generation device that generates electricity by chemically reacting hydrogen, which is a negative electrode active material, and oxygen, which is a positive electrode active material. 10 is disconnected once when a power failure is detected, but is connected to a storage battery as a power source. It is desirable that the storage battery 8 always secures a necessary amount of electricity stored during a power failure so that these emergency power supplies 5 can sufficiently perform their power supply function during a power failure.

  The gas cogeneration apparatus 6 is always operated using city gas or the like as fuel, and supplies generated electric power to the main line 4 and simultaneously supplies generated hot water to each dwelling unit. The solar power generation device 7 is also always operated and supplies generated power to the main line 4. These power generation means are used in combination with an electric power system, and use the thermal energy at the time of power generation for efficient operation of energy.

As shown in FIG. 3, when the power failure detection device 10 detects a power failure in the power system and a power failure signal is output, the trunk power supply controller 11 turns off the trunk switch 3 by a motor drive or the like, Disconnect from the power system. This is to prevent the power of the emergency power supply 5 from flowing out through the power system. Further, the main power supply control unit 11 that has received the power failure signal drives the fuel cell 9 once disconnected as the emergency power source 5 by performing a linked operation using the storage battery 8 as a power source. Since the fuel cell 9 requires time until its output is stabilized, the storage battery 8 becomes the main power supply during that time.
As shown in FIG. 4, when the power failure detection device 10 detects a power recovery of the power system and a power recovery signal is output, the main power supply control unit 11 turns on the main switch 3 by a motor drive or the like. 4 is connected to the power system. As a result, the fuel cell 9 is connected to the power system.

Next, the configuration of the distribution board with a current management function of the present invention will be described with reference to FIG.
In FIG. 2, reference numeral 12 denotes a main breaker connected to the main line 4. The capacity is, for example, about 60A. The secondary side of the main breaker 12 is branched, and one of them is an emergency circuit 13 to which a specific load requiring power supply is connected even during a power failure, and includes a circuit breaker 20 that protects the emergency circuit. . The other is connected to a general circuit switch 14. On the secondary side of this general circuit switch 14, a branch circuit 16 for supplying power to a general load is provided via a bus bar 21. The specific load is the minimum necessary load such as lighting or fire alarm, and its capacity is extremely small with respect to the rated capacity of the main breaker 12, and is preferably about 3A, for example. The specific load may be installed as an emergency outlet in each dwelling unit so that the resident can freely use it, or the equipment used by the management company may be specified and wired.
Note that the main breaker 12 and the breaker 20 are normally used breakers that are cut off when an overcurrent flows, and are normally connected regardless of a signal at the time of power failure / recovery.

  The general circuit switch 14 is preferably a latch relay having a self-holding function, and can be turned on and off by a short time energization. Therefore, the general circuit switch 14 is more suitable for open / close control during a power failure than a general relay requiring constant energization. . Also, no humming noise is generated by energization. The general circuit switch 14 is controlled to be opened and closed by a management unit which is an opening / closing control unit 15. The management unit includes a battery 17, and when a power failure signal is input from the external main line power supply control unit 11, the latch relay is driven to disconnect the branch circuit 16 from the main line 4. The battery 17 can be a capacitor, but may be a small battery provided outside the management unit.

  When the general circuit switch 14 is turned off at the time of a power failure, all the power supply to the general load is cut off, but the emergency circuit 13 connected in parallel with the general circuit switch 14 is continuously supplied with power. . However, since the capacity of the specific load connected to the emergency circuit 13 is small as described above, the power supply can be continued for a long time without installing the large-capacity emergency power source 5, and the power failure can be continued for a long time. The minimum necessary power can be supplied. Since a large-capacity emergency power supply 5 is not required, the cost burden of the resident on the introduction of equipment can be suppressed.

  When the power system recovers, as shown in FIG. 4, a power recovery signal from the power failure detection device 10 is input to the management unit that is the open / close control unit 15 via the main power supply control unit 11, and the management unit is generally Prior to turning on the circuit switch 14, the state of charge of the battery 17 is confirmed. As shown in FIG. 4, if it can be confirmed that the amount of charge of the battery 17 has reached a predetermined level, for example, it is in a fully charged state, the general circuit switch 14 is turned on. However, when the charge amount is not sufficient, the general circuit switch 14 is turned off and the standby is performed. After the charge amount of the battery 17 is recovered, the general circuit switch 14 is turned on. The reason is that the power failure may occur again immediately after the power recovery, and the general circuit switch 14 must be turned off by the battery 17 in the power failure state. This is because it is preferable to put As a result, even when a power failure occurs again immediately after power recovery, the power supply to the general load can be reliably cut off.

  In the above-described embodiment, the latch relay having a self-holding function is used as the general circuit switch 14, but a breaker driven by an external signal can also be used. However, in that case, it is necessary to dispose an external loading device adjacent to the breaker for recharging the breaker.

  As shown in FIG. 2, in the above-described embodiment, the main circuit breaker 12 is arranged in the space on one side of the branch circuit 16 in the distribution board casing 18 a, and the general circuit switch 14 is placed in the space on the opposite side. The bus bar 21 to which the branch circuit 16 is connected is connected from the opposite side of the main breaker 12. Since the positional relationship between the main circuit breaker 12 and the branch circuit 16 is the same as that of a general distribution board, this arrangement allows the general circuit switch 14 and the switching control unit 15 to be added to the existing distribution board. Since the wiring from the general circuit switch 14 to the bus bar 21 is easy when assembled, there is an advantage that it is possible to easily modify the distribution board with a current management function of the present invention.

  As described above, according to the present invention, an emergency power source is provided by supplying necessary power to a specific load connected to the emergency circuit 13 even in the event of a power failure, while stopping power supply to a general load. The power supply from the emergency power source 5 can be continued even when the power outage lasts for a long time. The distribution board with a current management function of the present invention is particularly suitable for an apartment house, but it goes without saying that it can be widely applied to facilities equipped with emergency power supplies such as hotels, hospitals and factories. It can also be applied to a detached house with an emergency power supply.

DESCRIPTION OF SYMBOLS 1 Branch line of high voltage electric wire 2 Transformer 3 Trunk line switch 4 Trunk line 5 Emergency power supply 6 Gas cogeneration device 7 Solar power generation device 8 Storage battery 9 Fuel cell 10 Power failure detection device 11 Trunk power source control part 12 Trunk breaker 13 Emergency circuit 14 General circuit switch 15 Open / close control unit 16 Branch circuit 17 Battery 18 Distribution board 18a Distribution board casing 19 Trunk distribution board 20 Breaker 21 Bus bar

Claims (3)

Connected to the secondary side of the main breaker connected to the main line to which the emergency power supply is connected, a general circuit switch having an open / close control unit that is controlled to open / close by a power failure recovery signal input from the outside, A branch circuit is provided on the secondary side of the general circuit switch, and an emergency circuit is connected in parallel with the general circuit switch, and a driving battery is connected to the general circuit switch. A distribution board with a current management function , wherein the switching control unit confirms that the amount of charge of the battery has reached a predetermined level when power is restored, and then causes the general circuit switch to perform a closing operation . 2. The distribution board with a current management function according to claim 1, wherein a main circuit breaker is arranged in a space on one side of the branch circuit in the distribution board casing, and a general circuit switch is arranged in the space on the opposite side. 2. A distribution board with a current management function according to claim 1, wherein the general circuit switch is a latch relay having a self-holding function.

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