JPH0687605B2 - Closed switchboard - Google Patents
Closed switchboardInfo
- Publication number
- JPH0687605B2 JPH0687605B2 JP62082111A JP8211187A JPH0687605B2 JP H0687605 B2 JPH0687605 B2 JP H0687605B2 JP 62082111 A JP62082111 A JP 62082111A JP 8211187 A JP8211187 A JP 8211187A JP H0687605 B2 JPH0687605 B2 JP H0687605B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- control
- relay
- measurement
- transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Patch Boards (AREA)
- Emergency Protection Circuit Devices (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は閉鎖配電盤の計測及び保護回路に関するもの
である。The present invention relates to a measurement and protection circuit for a closed switchboard.
第２図は従来形の閉鎖配電盤に電子式計測装置及び電子
式複合保護リレーを使用した場合の回路図を示し、
（１）は閉鎖配電盤の主母線、（２）は遮断品、（３）
は計器用変流器、（４）は零相変流器、（５）は計器用
変圧器、（６）は計器用変圧器２次巻線、（７）は計器
用変圧器３次巻線を示す。（８）は制御電源母線、（4
0）は電子式複合保護リレー、（41）は計測・制御・表
示ユニツト、（29）は計器用変圧器２次巻線からの２次
電圧入力用配線、（30）は計器用変圧器３次巻線からの
零相電圧入力用の配線、（31）は電子式複合保護リレー
（40）による遮断器（２）の引外し指示回路、（32）は
計器用変流器（３）の２次電流回路、（33）は零相変流
器（４）からの零相電流入力回路、（34）は計測・制御
・表示ユニツト（41）からの遮断器（２）の開閉操作及
び遮断器（２）の開閉状態を計測・制御・表示ユニツト
（41）に表示する為の信号回路、（35）は制御電源母線
（８）より計測・制御・表示ユニツト（41）への制御電
源入力回路、（36）は電子式複合保護リレー（40）の動
作要素を計測・制御・表示ユニツトに表示する為の回
路、（37）は計器用変流器（３）の２次電流回路、（3
8）は電子式複合保護リレー（40）の動作要素の接点を
外部の用途用として引出す為の端子台、（39）はその引
出線を示す。FIG. 2 shows a circuit diagram when an electronic measuring device and an electronic compound protection relay are used in a conventional closed switchboard,
(1) is the main busbar of a closed switchboard, (2) is a barrier product, (3)
Is an instrument current transformer, (4) is a zero-phase current transformer, (5) is an instrument transformer, (6) is an instrument transformer secondary winding, and (7) is an instrument transformer tertiary winding. Shows a line. (8) is the control power bus, (4
0) is an electronic composite protection relay, (41) is a measurement / control / display unit, (29) is a wiring for secondary voltage input from the secondary winding of the instrument transformer, and (30) is a transformer 3 for the instrument. Wiring for zero-phase voltage input from the next winding, (31) is the trip instruction circuit of the circuit breaker (2) by the electronic compound protection relay (40), and (32) is the current transformer for instrument (3). Secondary current circuit, (33) Zero-phase current input circuit from zero-phase current transformer (4), (34) Opening and closing of circuit breaker (2) from measurement / control / display unit (41) Signal circuit for displaying the open / closed state of the instrument (2) on the measurement / control / display unit (41), and (35) is the control power input from the control power bus (8) to the measurement / control / display unit (41). Circuit, (36) is a circuit for displaying the operating elements of the electronic compound protection relay (40) on the measuring, controlling and displaying unit, (37) is a current transformer for instrument (3) Secondary current circuit of (3
8) shows a terminal block for drawing out the contact of the operating element of the electronic compound protection relay (40) for external use, and (39) shows the lead wire.
次に閉鎖配電盤の計測・制御及び保護回路構成について
説明する。計器用変流器（３）の２次電流回路（32），
（37）及び零相変流器（４）の２次電流回路（33），計
器用変圧器２次回路（29）及び３次回路（30）及び制御
電源回路（28），（35）の配線は1.25mm2或いは2.0mm2
のビニール電線によるものであり、電子式複合保護リレ
ー（40）及び計測・制御・表示ユニツト（41）への接続
部は端子台でのネジ締め方式である。計器用変流器
（３），零相変流器（４）及び計器用変圧器（５）の２
次回路（29）及び計器用変圧器３次回路（30）には2.0m
m2のビニール電線が使用され、遮断器（２）の制御回路
（31）及び電子式複合保護リレー（40）の動作表示回路
（36）には1.25mm2のビニール電線が使用されている。Next, the measurement / control and protection circuit configuration of the closed switchboard will be described. Secondary current circuit (32) of current transformer (3) for instrument,
(37) and the secondary current circuit (33) of the zero-phase current transformer (4), the instrument transformer secondary circuit (29) and the tertiary circuit (30) and the control power supply circuit (28), (35) Wiring is 1.25mm 2 or 2.0mm 2
The connection to the electronic compound protection relay (40) and the measurement / control / display unit (41) is a screw tightening method on the terminal block. Instrument current transformer (3), zero-phase current transformer (4) and instrument transformer (5) 2
2.0m for the secondary circuit (29) and the instrument transformer tertiary circuit (30)
A vinyl electric wire of m 2 is used, and a 1.25 mm 2 vinyl electric wire is used for the control circuit (31) of the circuit breaker (2) and the operation display circuit (36) of the electronic composite protection relay (40).
従来の方式は以上のように構成されているので、電子式
複合保護リレーを単体チエツク等の目的で実系統での運
転状態から取外したい場合、入出力の配線をネジ止め接
続部で外さねばならず、計器用変流器２次回路の配線を
外すと、計器用変流器２次オープンとなり機器及び配線
の絶縁を脅やかす過電圧が発生する。また、電子式複合
保護リレーを取外すと、計測・制御・表示ユニツトへの
入力は、電子式複合リレーを経由して、入つているの
で、その入力もなくなつてしまい、電流，電力等の電力
計測が出来なくなる。Since the conventional system is configured as described above, if you want to remove the electronic compound protection relay from the operating state of the actual system for the purpose of a single check, etc., you have to remove the input / output wiring with the screwed connection part. However, if the wiring of the secondary circuit of the current transformer for the instrument is removed, the secondary current transformer for the instrument is opened and overvoltage occurs that threatens the insulation of the device and the wiring. Also, when the electronic compound protection relay is removed, the input to the measurement / control / display unit goes in via the electronic compound relay, so that the input also disappears, and the power such as current and power is lost. It becomes impossible to measure.
この発明は上記のような問題点を解消する為になされた
もので、閉鎖配電盤内の電子式保護リレーを随時実系統
での運転状態から切離して、取外し出来、しかも計器用
変流器２次回路オープンとならず、また計測・制御・表
示ユニツトはこれと関係なく実系統上で運転を続けられ
るもので、電子式保護リレーはコネクターにて容易に着
脱できるような装置を得ることを目的とする。The present invention has been made to solve the above-mentioned problems, and the electronic protection relay in the closed switchboard can be detached by disconnecting it from the operating state of the actual system at any time. The circuit is not opened, and the measurement / control / display unit can continue to operate on the actual system regardless of this.The purpose is to obtain a device that allows the electronic protection relay to be easily attached and detached with the connector. To do.
この発明に係る閉鎖配電盤は、機器制御回路，計器用変
流器２次回路，零相変流器２次回路，計器用変圧器２次
回路及び制御電源回路等からなる閉鎖配電盤の制御回路
の中に、中継補助ユニットを設けることにより、制御回
路中の電子機器部分と従来からの一般制御回路を区分
し、計器用変流器２次回路には更に電流レベルを小さく
する為の補助計器用変流器を設け、この回路に抵抗を挿
入し、この電圧降下分を電子式複合リレーの入力とし、
コネクターで容易に接続，切離し出来るようにしたもの
である。The closed switchboard according to the present invention is a control circuit for a closed switchboard that includes a device control circuit, a current transformer secondary circuit for a meter, a zero-phase current transformer secondary circuit, a transformer secondary circuit for a meter, and a control power supply circuit. By installing a relay auxiliary unit inside, the electronic device part in the control circuit is divided from the conventional general control circuit, and the auxiliary current meter secondary circuit for the auxiliary current instrument is used to further reduce the current level. A current transformer is provided, a resistor is inserted in this circuit, and this voltage drop is used as the input of the electronic compound relay.
This is a connector that can be easily connected and disconnected.
この発明における閉鎖配電盤はその制御回路の中に、中
継補助ユニツトを設けることにより、制御回路の中で電
子機器部分と、それ以外の制御回路部分との区分，レベ
ル分けが可能となり、また中継補助ユニツトの中で計器
用変流器２次の電流を電圧に変換して電子式複合保護リ
レーへの入力とすることにより、随時コネクターにて着
脱可能であり、切離しても計器用変流器２次回路オープ
ンとならないようにしている。By providing a relay auxiliary unit in the control circuit of the closed switchboard according to the present invention, the electronic device part and the other control circuit parts in the control circuit can be classified and leveled. Current transformer for instrument in the unit By converting the secondary current into voltage and inputting it to the electronic composite protection relay, it can be attached and detached at any time by the connector. I try not to open the next circuit.
以下この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図において、（１）は閉鎖配電盤の主母線、（２）
は遮断器、（３）は計器用変流器、（４）は零相変流
器、（５）は計器用変圧器、（６）は計器用変圧器２次
巻線、（７）は計器用変圧器の３次巻線、（８）は制御
電源母線、（９）は中継補助ユニツト、（10）は電子式
複合保護リレー、（11）は電子式の計測・制御・表示ユ
ニツト、（12）は計器用変圧器２次巻線（６）からのPT
出力を電子式複合保護リレー（11）及び電子式の計測・
制御・表示ユニツト（12）に入力にするに当たり、電圧
レベルを下げる為の補助の計器用変圧器すなわち電圧レ
ベル低減手段である。（13）は計器用変圧器３次巻線
（７）からのPT出力を電子式複合保護リレー（10）に入
力するに当たり、電圧レベルを下げる為の補助の計器用
変圧器すなわち電圧レベル低減手段である。（14）は計
器用変流器（３）の出力を計測・制御・表示ユニット
（11）に入力するに当たり、電流レベルを下げる為の補
助計器用変流器、（15）は計器用変流器（３）の出力を
複合保護リレー（10）に入力する為に電流レベルを下げ
る為の補助計器用変流器、（16）は閉鎖配電盤内の制御
電源母線（８）からの制御電源を電子機器である電子式
複合保護リレー（10）及び計測・制御・表示ユニツト
（11）用の電子機器レベルの制御電源にする為のDC/DC
コンバーターである。（17）は補助計器用変流器（15）
の２次電流を電圧要素に変換して電子式複合保護リレー
（10）に伝達する為の抵抗すなわち電圧信号生成手段、
（18）は補助計器用変流器（14）の２次電流を電圧要素
に変換して計測・制御・表示ユニツト（11）に伝達する
為の抵抗すなわち電圧信号生成手段、（19）は零相変流
器（４）の２次電流を電圧要素に変換して電子式複合保
護リレー（10）に伝達する為の抵抗すなわち電圧信号生
成手段、（20）は電子式複合保護リレー（10）の保護リ
レー動作によるデジタル出力及び計測・制御・表示ユニ
ツト（11）からの遮断器の開閉制御，遠方−直接切替え
の為のデジタル出力を電子機器レベルから閉鎖配電盤収
納機器、或いは盤外機器の制御レベルに変換，増幅する
為の、或いは逆の方向の変換をする為の補助リレー群で
ある。（21）は補助リレー群（20）から外部への引出，
外よりの引込みの端子台、（22）は電子式複合保護リレ
ー（10）の動作出力，計測・制御・表示ユニツト（11）
からの制御出力、或いは遮断器（２）の開閉接点出力を
とり込んで、遮断器（２）の開閉制御回路を集約した制
御ユニット、（23）は中継補助ユニット（９）と電子式
複合保護リレー（10）間を結ぶコネクターの接続個所、
（24）はそのコネクターのケーブル、（25）は中継補助
ユニツト（９）と計測・制御・表示ユニツト（11）間を
結ぶコネクターの接続個所、（26）は電子式複合リレー
側のコネクター接続部、（27）は計測・制御・表示ユニ
ツト側のコネクター接続部、（28）は制御電源母線
（８）から中継補助ユニツト（９）への制御電源の引込
線、（29）は計器用変圧器２次巻線（６）から中継補助
ユニツト（９）への配線、（30）は計器用変圧器３次巻
線（７）から中継補助ユニツト（９）への配線、（31）
は遮断器（２）と中継補助ユニツト（９）を結ぶ遮断器
（２）の制御回路配線、（32）は計器用変流器（３）の
２次回路で、中継補助ユニツト（９）との間を結ぶ配
線、（33）は零相変流器（４）の２次回路で中継補助ユ
ニツト（９）との間を結ぶ配線、（34）は中継補助ユニ
ツト（９）と計器・制御・表示ユニツト（11）を結ぶコ
ネクターケーブルである。In Fig. 1, (1) is the main busbar of a closed switchboard, and (2)
Is a circuit breaker, (3) is an instrument current transformer, (4) is a zero-phase current transformer, (5) is an instrument transformer, (6) is an instrument transformer secondary winding, and (7) is Tertiary winding of instrument transformer, (8) control power bus, (9) relay auxiliary unit, (10) electronic compound protection relay, (11) electronic measuring, controlling and displaying unit, (12) is the PT from the transformer secondary winding (6)
Output is electronic composite protection relay (11) and electronic measurement
This is an auxiliary instrument transformer for lowering the voltage level when inputting to the control / display unit (12), that is, a voltage level reducing means. (13) is an auxiliary instrument transformer for reducing the voltage level when the PT output from the instrument transformer tertiary winding (7) is input to the electronic composite protection relay (10), that is, voltage level reduction means. Is. (14) is an auxiliary current transformer for lowering the current level when the output of the current transformer (3) is input to the measurement / control / display unit (11), and (15) is a current transformer for the instrument. A current transformer for auxiliary instrument for lowering the current level in order to input the output of the device (3) to the composite protection relay (10), (16) is the control power supply from the control power bus (8) in the closed switchboard. DC / DC to be used as electronic equipment level control power supply for electronic compound protection relay (10) and measurement / control / display unit (11)
It is a converter. (17) is a current transformer for auxiliary instrument (15)
Resistance for converting the secondary current of the above into a voltage element and transmitting it to the electronic composite protection relay (10), that is, voltage signal generating means
(18) is a resistance for converting the secondary current of the auxiliary current transformer (14) into a voltage element and transmitting it to the measurement / control / display unit (11), that is, a voltage signal generating means, and (19) is zero. A resistance or voltage signal generating means for converting the secondary current of the phase current transformer (4) into a voltage element and transmitting it to the electronic composite protection relay (10), and (20) an electronic composite protection relay (10). Output from the protective relay operation of the device and control of circuit breaker opening / closing from the measurement / control / display unit (11), digital output for remote / direct switching from the electronic equipment level to the closed equipment of the distribution panel or the equipment outside the panel It is a group of auxiliary relays for converting and amplifying to the level or for converting in the opposite direction. (21) is a lead out from the auxiliary relay group (20),
Terminal block that is pulled in from the outside, (22) is the operation output of the electronic compound protection relay (10), measurement / control / display unit (11)
A control unit that integrates the switching control circuit of the circuit breaker (2) by taking in the control output from the circuit breaker or the switching contact output of the circuit breaker (2), and (23) the relay auxiliary unit (9) and electronic composite protection. Connection point of the connector that connects between the relays (10),
(24) is the cable of the connector, (25) is the connection point of the connector that connects the relay auxiliary unit (9) and the measurement / control / display unit (11), and (26) is the connector connection part on the electronic composite relay side. , (27) is a connector connection part on the measurement / control / display unit side, (28) is a control power supply lead line from the control power supply busbar (8) to the auxiliary relay unit (9), and (29) is an instrument transformer 2 Wiring from the secondary winding (6) to the relay auxiliary unit (9), (30) wiring from the instrument transformer tertiary winding (7) to the relay auxiliary unit (9), (31)
Is a control circuit wiring of the circuit breaker (2) that connects the circuit breaker (2) and the relay auxiliary unit (9), and (32) is a secondary circuit of the current transformer (3) for the meter, which is the relay auxiliary unit (9). Wiring to connect between them, (33) is a secondary circuit of the zero-phase current transformer (4) and is connected to the relay auxiliary unit (9), (34) is the relay auxiliary unit (9) and the instrument / control -It is a connector cable that connects the display unit (11).
次に動作について説明する。Next, the operation will be described.
遮断器（２）の本体内制御回路は配線（31）により、中
継補助ユニツト（９）と接続され、中継補助ユニツト
（９）内の制御ユニツト（22）に集約された制御回路に
より、制御される。この制御ユニツト（22）には引込線
（28）によつて制御電源が引込まれるとともに、電子式
複合保護リレー（10）の動作時のデジタル出力信号及び
計測・制御・表示ユニツト（11）からの遮断器（２）の
開閉制御信号が伝達され、遮断器（２）の制御の中核機
能を果たす。また、遮断器（２）の開閉状態信号はこの
制御ユニツト（22）を経由して計測・制御・表示ユニツ
ト（11）に伝達され、このユニツト（11）上にてLED等
の表示灯（図示せず）で表示される。計器用変圧器２次
巻線（29）及び３次巻線回路（30）は中継補助ユニツト
（９）につなぎ込まれ、この中で、その出力は補助計器
用変圧器（12），（13）により電子機器（10），（11）
への入力レベルの小さな値にした後、電子式複合保護リ
レー（10）或いは計測・制御・表示ユニツト（11）にコ
ネクター及びコネクターケーブル（23），（24），（2
6），（25），（34），（27）により伝達される。ま
た、計器用変流器（３）の２次回路は中継補助ユニツト
（９）につなぎ込まれ、この中で、その出力は計器用補
助変流器（14），（15）により電子機器レベルの小さな
値にした後、この電流レベルの値を抵抗（17），（18）
により電圧レベルに変換して電子式複合保護リレー（1
0）及び計測・制御・表示ユニツト（11）にコネクター
及びコネクターケーブル（23），（24），（25），（2
6），（27），（34）により伝達される。零相変流器
（４）の２次回路は中継補助ユニツト（９）につなぎ込
まれ、この中で、電流レベルの出力を抵抗（19）により
電圧レベルに変換して電子式複合保護リレー（10）にコ
ネクター及びコネクターケーブル（23），（24），（2
5），（26），（27），（34）により伝達される。閉鎖
配電盤内の制御電源母線（８）より制御電源を引込み、
DC/DCコンバーター（16）により電子機器レベルの制御
電圧に変換した後、電子式複合保護リレー（10）及び計
測・制御・表示ユニツト（11）にコネクター及びコネク
ターケーブル（23），（24），（25），（26），（2
7），（34）により引込まれる。電子式複合保護リレー
（10）のリレー要素の動作のデジタル出力或いは計測・
制御・表示ユニツト（11）からのデジタル出力で外部の
用途に使用する場合は、補助リレー群（20）により外部
用途に使用できる接点出力として端子台（21）に配線出
力される。The control circuit in the main body of the circuit breaker (2) is connected to the relay auxiliary unit (9) by the wiring (31) and is controlled by the control circuit integrated in the control unit (22) in the relay auxiliary unit (9). It A control power source is drawn into the control unit (22) by a lead-in wire (28), and a digital output signal and a measurement / control / display unit (11) from the operation of the electronic composite protection relay (10). An opening / closing control signal of the circuit breaker (2) is transmitted to perform the core function of controlling the circuit breaker (2). Also, the open / closed state signal of the circuit breaker (2) is transmitted to the measurement / control / display unit (11) via this control unit (22), and an indicator light such as an LED (Fig. (Not shown) is displayed. The transformer secondary winding (29) and the tertiary winding circuit (30) are connected to the relay auxiliary unit (9), the output of which is the auxiliary transformers (12), (13). ) By electronic equipment (10), (11)
After reducing the input level to the electronic composite protection relay (10) or the measurement / control / display unit (11), the connectors and connector cables (23), (24), (2)
6), (25), (34), (27). In addition, the secondary circuit of the current transformer for meter (3) is connected to the relay auxiliary unit (9), and the output of the secondary circuit is connected to the electronic current level by the auxiliary current transformers for meters (14) and (15). After setting the value of this current level to a small value, the resistance (17), (18)
Convert to voltage level by using electronic compound protection relay (1
0) and the measurement / control / display unit (11) with connectors and connector cables (23), (24), (25), (2)
6), (27), (34). The secondary circuit of the zero-phase current transformer (4) is connected to the relay auxiliary unit (9), in which the output of the current level is converted into the voltage level by the resistor (19) and the electronic composite protection relay ( 10) Connector and connector cable (23), (24), (2
5), (26), (27), (34). Pull in the control power from the control power bus (8) in the closed switchboard,
After converting to the control voltage of the electronic equipment level by the DC / DC converter (16), the electronic composite protection relay (10) and the measurement / control / display unit (11) have connectors and connector cables (23), (24), (25), (26), (2
It is drawn in by 7) and (34). Digital output or measurement of operation of relay element of electronic compound protection relay (10)
When used for external purposes with the digital output from the control / display unit (11), the auxiliary relay group (20) outputs to the terminal block (21) as contact output that can be used for external purposes.
なお、上記変流器（４），（14），（15）の２次側出力
は抵抗（17），（18），（19）によつて電圧信号に変換
される。このような方式をとるためには、変流器（４）
と抵抗（19），変流器（14）と抵抗（18），変流器（1
5）と抵抗（17）はおのおの閉回路を構成する必要があ
る。このため、仮りに抵抗（17），（18），（19）の出
力側のうちどれが開放しても各変流器（４），（14），
（15）の２次側が開放することはない。このため、仮り
に電子式複合保護リレー（10）或いは計測・制御・表示
ユニツト（11）のどちらを取り外しても前記変流器
（４），（14），（15）の２次側が開放することはな
い。The secondary side outputs of the current transformers (4), (14) and (15) are converted into voltage signals by the resistors (17), (18) and (19). In order to take such a method, the current transformer (4)
And resistance (19), current transformer (14) and resistance (18), current transformer (1
Each of 5) and the resistor (17) must form a closed circuit. Therefore, even if any of the output sides of the resistors (17), (18), (19) is opened, the current transformers (4), (14),
The secondary side of (15) will not be opened. Therefore, even if either the electronic compound protection relay (10) or the measurement / control / display unit (11) is removed, the secondary side of the current transformers (4), (14), (15) is opened. There is no such thing.
なお、上記実施例では、閉鎖配電盤に遮断器（２）を収
納した場合について説明したが、遮断器でなくコンタク
タ等の開閉器や或いは断路器や他の開閉装置であつても
良く、上記実施例と同様の効果を奏する。In the above embodiment, the case where the circuit breaker (2) is housed in the closed switchboard has been described, but a switch such as a contactor or a disconnector or another switchgear may be used instead of the circuit breaker. It has the same effect as the example.
以上のようにこの発明によれば、閉鎖配電盤の計測・制
御・表示回路の中に中継補助ユニツトを設け、この中継
補助ユニツトの中で、計器用変流器２次回路の電流を電
圧要素に変換して保護リレー或いは表示装置に信号を供
給するため、保守点検が容易な閉鎖配電盤が得られる効
果がある。As described above, according to the present invention, the relay auxiliary unit is provided in the measurement / control / display circuit of the closed switchboard, and in this relay auxiliary unit, the current of the secondary circuit of the current transformer for the meter is used as the voltage element. Since the signal is converted and the signal is supplied to the protection relay or the display device, there is an effect that a closed switchboard which can be easily inspected is obtained.
第１図はこの発明の一実施例による閉鎖配電盤の計測・
制御・表示回路及びそれに関連する機器構成図を示す。
第２図は従来方式の閉鎖配電盤の計測・制御・表示回路
構成を示す。 図において、（１）は主母線、（２）は遮断器、（３）
は計器用変流器、（４）は零相変流器、（５）は計器用
変圧器、（８）は制御電源母線、（９）は中継補助ユニ
ツト、（10）は電子式複合保護リレー、（11）は計測・
制御・表示ユニツト、（24），（34）はケーブルであ
る。 なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 shows the measurement of a closed switchboard according to an embodiment of the present invention.
3 shows a control / display circuit and a device configuration diagram related thereto.
FIG. 2 shows a measurement, control, and display circuit configuration of a conventional closed switchboard. In the figure, (1) is a main bus, (2) is a circuit breaker, and (3)
Is an instrument current transformer, (4) is a zero-phase current transformer, (5) is an instrument transformer, (8) is a control power bus, (9) is a relay auxiliary unit, and (10) is electronic compound protection. Relay, (11) is measurement
The control / display unit (24) and (34) are cables. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
計器用変圧器と、主母線の電流に比例したCT信号を送出
する変流器と、前記PT信号およびCT信号を基に計測ある
いは制御を行う計測・制御ユニットとを備えた配電盤に
おいて、前記計器用変圧器および前記変流器と前記計測
・制御ユニットとの間に中継補助ユニットを設け、この
中継補助ユニット内に前記PT信号のレベルを低減し電子
機器レベルの電圧信号として出力する電圧レベル低減手
段と、前記CT信号を抵抗を介して電圧信号に変換し電子
機器レベルの電圧信号として出力する電圧信号生成手段
とを少なくとも有することを特徴とする閉鎖配電盤。1. A transformer for an instrument that sends a PT signal proportional to the voltage of the main bus, a current transformer that sends a CT signal proportional to the current of the main bus, and a measurement based on the PT signal and the CT signal. Alternatively, in a switchboard equipped with a measurement / control unit for controlling, a relay auxiliary unit is provided between the measuring transformer and the current transformer and the measurement / control unit, and the PT signal is provided in the relay auxiliary unit. At least, and a voltage signal generation means for converting the CT signal into a voltage signal via a resistor and outputting the voltage signal as an electronic device level voltage signal. A closed switchboard characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62082111A JPH0687605B2 (en) | 1987-04-02 | 1987-04-02 | Closed switchboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62082111A JPH0687605B2 (en) | 1987-04-02 | 1987-04-02 | Closed switchboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63249410A JPS63249410A (en) | 1988-10-17 |
| JPH0687605B2 true JPH0687605B2 (en) | 1994-11-02 |
Family
ID=13765290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62082111A Expired - Fee Related JPH0687605B2 (en) | 1987-04-02 | 1987-04-02 | Closed switchboard |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0687605B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59144305A (en) * | 1983-02-02 | 1984-08-18 | 三菱電機株式会社 | Switchboard |
-
1987
- 1987-04-02 JP JP62082111A patent/JPH0687605B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63249410A (en) | 1988-10-17 |
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