JPS5911722A - Protecting system for power distribution circuit - 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 solves problems caused by short circuits in the system. This article relates to a protection force formula for a distribution system that uses a power-operated negative front switch that does not have current switching capability but has a constant overcurrent and switching impression of the rated current or higher. [Technical Background of the Invention] Fig. 1 shows an overview of the intermediary equipment arrangement system and its overall planning system. I￥. In l. 1 is from the breaker 2 on the transmission side of the power transmission system (7 not shown). Its primary (11Q r
In the variable I315 to which double voltage is applied, the secondary voltage is 2
Via the down side breaker 4. 11 wire 5 (shown in the diagram through two connected wires, wires, and disconnector 6). As for 3, use a disconnector (disconnector or) that has the opening/closing ability to open and close the rated ItI current, and the switching capacity of the device to the extent that it can open and close the rated ItI current, and its operation is done by hand. The protection method for this system is as follows. Transformation ζj: f j's internal failure detection relay 7, secondary side overload llL detection relay 8, and ground fault overflow detection relay 9 h. If that relay operates (-!l411f'hiTru logout relay-1
The operation signal of 0 is transferred to the power transmission side, and the
〇〇〇〇〇〇〇〇〇〇〇〇〇〇Technical Problems〕〕〇〇〇〇〇〇〇〇〇〇Technical Problems〕〕〇〇However, in the protection method mentioned above, despite Since the load switch breaker 2 is left open at Nt'l due to the inability to handle the problem, not only is it impossible to supply power to other healthy systems, but also manual operation of the load switch 3 due to maintenance personnel's judgment ν4u

[
2 Emergency C 2 Time-consuming 0 Still, if you try to protect on the reverse G 2 skewer side, the f of the power receiving circuit
Install a commercially available breaker for C2, which is very thick, in place of 3 for the previous opening/closing switch. [Objective of the Invention] The present invention was developed in view of the above-mentioned circumstances, and its purpose is to enable the receiving side to monitor accidents on the receiving side. ! 1111
Economical and economical mountain removal BFI+ +85
There is a need to provide a 1μ method to maintain a distribution system that can be set to y. [Summary of the Invention] In order to achieve the above object, the present invention transmits the force on the vomiting system side and receives it with a pressure regulator via a side breaker and a receiving piece i side listener, 1)) In the distribution system supplying the negative power supply group, the short-circuit current opening of the system as a 1411 lfl device on the above-mentioned side is not limited to the rated tonne m and above. 7J11Itj, the power-operated load switch LV'j, which has the ability to open and close, is used to remove the blockage Ii1, and this power-operated load switch]1lIJrω
Opening/closing f41? , 10 stages of detection for detecting flow exceeding the force, and 7 + it detection means for detecting excessive flow below the opening/closing ability. tM
I7j1. The feature is that when the detection means operates and the high overcurrent detection means is not activated, the force operated member switch is released 1314. [Embodiments of the Invention] Hereinafter, the present invention will be described with reference to Figures 1 and 1, (+
11 + two to escape from enlightenment. 4. Figure 2. An example of the system +lη of the four-system protection system according to the present invention is;
-J- and omit the explanation, here %jj1
In other words, the second switch 1 is used instead of the manually operated load switch 3 in FIG. , Iga, ?-Each of the small currents, I-H's 31.
) 3 to 4 times f) -1 suction ゛small flow)
[Do 1-on] Power (・〜5 Formation Negative A'r: Work switch (hereinafter referred to as +f-kit switch ■-) ll Use 1
1. If a current flow device 12 is installed in that circuit, both C2 and SER-1 = SOTONITCH-1! θ] H1'l lV
J Noh) 1 Thoughts and Tricks '14. )Aj T;Y' test t13
fru1 Mr. Jj ``F'i IA<, detection relay 13, li (+ 13Fl Excessive N, flow detection T filtration quotient insufficient', lAt detection relay 14 are installed, and 1 port / Sogeout relay 10I - Internal failure detection relay of scraping transformer I 2. Secondary side] 1. Ground fault, flow detection, relay 8. Ground fault overflow detection relay 9. +
Either 6 or 13 low-over military style tenchi start relay/ha! f!
+) In the case of 4 o'clock, a lockout relay 15 was installed in the output circuit of the C two-wheeled vehicle. 26 Overvoltage I
A'T l, :, i outputs a relay I4θ] The normally closed contact 14b is opened, and the circuit switcher 111i is opened. Next, there is a 4'N 6ft, R method (knee) of 11 to 100cm! 1-・be2]. Masun, ゛Ima System Q〕Change 11; Vessel! (Secondary A1111)
゛1゛゛゛゛゛゛゜゜゜゜゜゜゛゛゛゛゛1゜゜゜゛゛゛1゜゛゛゛゛゛゛゛゛゛゛゛゛1゜゛゛゛1゜, circuit switcher-IT and current transformer! The current passing through the second-class receiving circuit is an iE current that flows on the high side through the impedance of the gauze pressure (c)l, so its value is generally (3 to 4 borrows of one rated current). , is the size of the moth at point A.
6 and. Change't'A1. 2 pieces of vessel 12
Yamaji 4 protruding relay 13 operates to Mr. ifi'', and its ji
111 output relay 15 (2 outputs. Also, the small current flowing into the receiving circuit is less than 3 to 4 times the size of the commercial flow, so there is no possibility of heavy overload. Current detection relay I4 does not operate and is normally closed, θzzb is closed 11'i
~shi, -(iz) o Therefore, lockout relay 15
Output 4 city numbers, from 2. The accident was eliminated by opening →No-Kit Switcher II via contact 14b11). Also, secondary side 1 still outside tfl↑, detection relay 8. Earth fault, 1 inch width 1 Ilf 4 protruding relay 9. Gisho equipment internal failure 1;
If 91 detection relay 7 operates (second, Utsutsuji and interpolation r
Suspension force of 2-1 pull-out relay I5 (Nursing force is released from No. 2 t-. 10,000, variable fF, t:"s I
If a short circuit occurs at the point (-1, high fi
(Because 1 bit of power is received 1 (' 1 path C 2 j A is 1 person + t': 4 + 0)] 1 small unit 1 moxibustion output; 7
, 9, and 74 together! till i'i-. This Jl,
(From 2, 1 heat J overvoltage 1'+It detection relay 14'',
1f
The operating signal of the lt detection relay 3 causes the L7 output relay 15 to switch to OrU+ (even if it is lowered, its output signal is blocked by the normally closed contact 14b. As mentioned above, in the 5-two protection system, the transformer on the receiving side! Automatically removes ``Kotaga+'' function C2.Other θ] Supply of force to healthy system ￥ Interchange 1iiH7ic <
At the same time, the 7% range can be clearly distinguished from +flit 1- to make the strain lsGi, and it can also be easily protected by f2. Also. There is no need to use a circuit breaker to the Otani line to protect against faults on the power receiving side, so this is an extremely economically advantageous receiving system.
To', g'r'< 1lli I.
``It is a forest that can do things and has a high degree of autonomy in irises].In addition, in Joki' Real #Di 4γ11, it is a protective hand, jika (-
- When using a combination of switcher 1t and fuse 16'17, as shown in Figure 3 (binary switcher 1t only) The same goes for X6 (p).And in such a case, if a short-circuit accident occurs at #5. In addition, wooden inventions can be used to express their gist within a range of 1- to 1- to refresh the body. [Effects of the invention] As explained above, the present invention 1jll2 ft, ke 1 phrase - electric circuit f nizaki sotonui sochar jlij 11
Since I made C2 so that it would be +-4, I decided to use C2 to create an economical power-receiving system using J1 rule. 1- It is possible to provide a system with a power system of 11φ due to the power distribution.

[Brief explanation of the drawing]

・Figure 'I41 shows the conventional power distribution system and its protection method f
41! '), Factors, Figures 21, 1 and 3 are block diagrams showing one embodiment of the wooden invention, Go 6, and other embodiments, respectively. Power transmission side...[Vacuum, 4
．． 6...Shiya...R device, 2...Transformer internal failure output relay, 8...2 tih 〕1
Hakukushi:, iM + moxibustion'l L/, Ii・
・・Kit switcher. 1,? , I j-...low, high J(jjskew', i
M, +fA output L/-, 1s-...Lockout relay, 16...Fuse. Out 1i1! t1 agent Ben) + 1 person Suzu tl-Bu
Hiko Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In the distribution system where power from the transmission system side is supplied to the negative group through the transmission side circuit breaker and the power receiving side switch, As a switch, a power-operated load switch is used that does not have short-circuit (+ti) switching capability for the system, but has a certain overcurrent switching capability that is higher than the rated current. The commerce chamber M [detecting means and detecting means for detecting excess flow exceeding the switching capability]
Exceeded by Mr. 1, the silkworms and the detection means are described in 1 above.
1-A distribution system Q characterized in that the power operated load switch is opened when the overcurrent detection means is activated and the overcurrent detection means is not activated. ] Protection method.