JPS59144305A - Switchboard - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power distribution board in which all the functions of all the devices in the panel are integrated into a unit, and the wiring is rationalized.

Conventionally, this type of switchboard has been constructed as shown in FIGS. 1 and 2. FIG. 1 is a diagram showing the main circuit configuration for measurement, control, and protection of a single high/low voltage circuit, and FIG. 2 is a block diagram showing the entire circuit configuration in FIG. 1 as a specific equipment configuration.

In the figure, fi+ is '#IL flowmeter, (2) is wattmeter,
(3) is a power factor meter, (4) is a voltmeter, )5) is a wattmeter,
(61 is a signal light, (7) C-operated switch, +81 is a ground fault relay, +91 rl'i overcurrent relay o+ ii
L, disconnector, αnu transformer (PT), (lZi current transformer (C
T), (13 is zero-phase current transformer (ZCT), α41c control terminal block, us ij: monitoring panel (door) side of closed switchboard, 00
is the main wire, α power is the power supply side branch conductor, and Q81 is the load side branch conductor.

In the switchboard configured as above, for each transformation, current transformer D, secondary output voltage of zero-phase current transformer u3, current 'km flow; 1 (II, 'vL meter (2), power factor meter (3), voltmeter (4), and electricity meter 151 to measure and display the state of the single main circuit, and at the same time, the above voltage, current, overcurrent relay (9), and ground fault relay are input. (8) are also input, and when the value reaches an abnormal value, each protective relay displays its operating state, and a contact signal is input to the breaker 1101K to trip the breaker (10).

On the other hand, when the operation switch (7) sends the breaker t101 K contact signal, the breaker (101 opens,
Is the closed signal light (6) in that state? indicate.

Each of these measuring instruments, control instruments, and specialized protection equipment has a display function such as a display, a pointer, etc., and a detection drive Isokita r.

Since the measurement, control, and protection mechanisms of conventional switchboards are configured as described above, each device must be connected with electric wires according to the necessary devices for each related circuit. Moreover, the monitoring panel (door) surface of the closed switchboard has many drawbacks, such as the need for extensive machining and installation depending on the number and shape of the required equipment.

This invention was made in order to eliminate the drawbacks of the conventional ones as mentioned above. If several units are divided by function, the wiring can be simplified by wiring between each unit and other devices using multi-core wires and connectors, for example.
At the same time, we aim to reduce the number of installation parts by combining a large number of measurement, control, and protection devices into a small number of units. Switchboard that can be reduced? What to offer? The purpose is

The following is a switchboard in one embodiment of this invention? This will be explained based on FIG. In the figure, 7 and disconnectors (101, transformer α, current transformer ■, zero-phase current transformer side, control terminal block -, monitoring panel, main bus αG, power supply side branch conductor αη, and load side branch conductor Q& is similar to the conventional one in Figs. 1 and 2. q9 is the signal input from transformer αB and current transformer C121. All these calculations are performed, and the values required for each measurement are calculated at once. If the calculated value becomes an abnormal value during calculation, a trip signal is sent to the breaker (lO)?The calculation element to output, the display of each cutting value calculated by this calculation element, and the status of the breaker (10) Display t Display elements that are performed at once? Integrated display/calculation unit, 4 is display/calculation unit) (1 (between 1 and transformer (1111, current transformer α2, and several books! level conversion element that performs level conversion 7 at once, and a level conversion/power supply unit integrated with the power supply required for each element), el
) is a multicore wire, and (a) is a connector.

Next, an embodiment of the present invention configured as described above will be described in detail.

Monitoring panels (doors) of closed switchboards are used to monitor the measured values of conventional measuring instruments and the parts that indicate their numerical values, the operation switches of control equipment, the status display of circuit breakers, and the operation display of protective relays. ) Items that need to be displayed on the stamp 7 are digitized all at once and put together as one display element, such as current transformer ports and transformers (1
By detecting all the magnitudes of the secondary power voltage of 11 etc. as input and performing all these calculations, the values necessary for measuring stain power, power factor, electric energy, etc. are obtained. At the same time as taking it out as a signal, if the value becomes an abnormal value, a trip signal is sent to the breaker (10) to protect the main circuit. (11, and current transformer 0z
, the secondary output from each metamorphosis? display/calculation unit) (1
``j), the operation signal from the display/computation unit, the signal to the circuit breaker? Level conversion to the optimal signal for each, the power supply required for each element such as display/computation, and the level □ Consists of two units: conversion/power supply unit, each unit (II, (7), current transformer port, transformer a, zero phase current transformer side, breaker (lO), control terminal block, etc. Wiring is done between devices (multi-core T wire + 21) and a connector@.In the above example, between each unit acid (7) and other devices?multi-core electric soap recess) and a connector @ are used for wiring. However, it is also possible to use a combination of a single core electric wire and a terminal block, a 1i original fiber, an original fiber and an FjL wire, etc.

Dad, I showed an example of applying it to a single main circuit in the example, but M% multiple times? It is also possible to perform multiple processing with two units) O'J and C4, producing the same effect.

As described above, according to the present invention, all these calculations are performed as the signal input from the means for detecting voltage and current.
What value is required for 1I? Each :)-L A calculation element that calculates all at once and outputs a trip signal to the breaker if the above calculation value becomes abnormal, and a display and breaker of each calculation value calculated by the above calculation element. What are the display elements for displaying the status of the equipment, the level conversion elements between the calculation elements, the means and the breaker, and the power supply elements required for each element? A power distribution board that can reduce the number of parts to be installed on the panel and simplify wiring? can be provided.

[Brief explanation of the drawing]

Figure 1 shows high and low voltage - main circuit measurement, control and protection relay vL equipment? A schematic diagram of a circuit configured with a conventional equipment configuration, Figure 2 is a block diagram of a specific equipment configuration based on the circuit configuration of Figure 1,
Figure 3 shows the fruit of this invention: What is the specific unit configuration according to an example? ! - In the diagram, (L9 is the display/calculation unit, @)ldl
, 'Bell conversion/power supply unit, etl) is a multi-core wire, @
represents a connector association. In addition, the same reference numerals in the drawings indicate the same or corresponding parts. Agent Tsukuda Tameno - Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] All these signals are input from the voltage and current sound detection means, and all of these are calculated, and the values necessary for each measurement are calculated at once. If the above calculated value becomes an abnormal value, a trip signal is issued to the circuit breaker. display of each measurement value calculated by the calculation element and the calculation element described above, and the status display of the breaker
Level conversion elements, display, calculation, etc., which are performed all at once, respectively, with integrated calculation/display units, and level conversion between the elements, the means, and the breaker, respectively Are you equipped with a level conversion/power supply unit that is integrated with the power supply required for the elements? Features a switchboard.