CN201504084U

CN201504084U - Portable digital protection and monitoring device

Info

Publication number: CN201504084U
Application number: CN2009200988383U
Authority: CN
Inventors: 武英; 陈岳; 宋朝晖
Original assignee: MUDANJIANG POWER BUREAU
Current assignee: MUDANJIANG POWER BUREAU
Priority date: 2009-01-06
Filing date: 2009-01-06
Publication date: 2010-06-09
Anticipated expiration: 2019-01-06

Abstract

The utility model relates to a portable digital protection and monitoring device which can achieve the function of overcurrent protection in the complex voltage locking direction and the real-time online monitoring function. A power-supply plug-in unit, an alternating current measurement plug-in unit, a CPU plug-in unit and a logic plug-in unit are respectively embedded in an aluminum alloy case; and a current terminal and a voltage terminal on the back side of the device are only required to be connected with a CT secondary output terminal and a PT secondary output terminal of a protected device by the operator, the device is provided with DC220 V, an operational power supply switch is turned on, the protection setting value is input to the device by using a panel key, and an I-section protection input pressure plate or an II-section protection input pressure plate and a protection trip pressure plate are put into service. The real-time parameters and the operating conditions of the device can be monitored from a liquid crystal display screen and a panel indicating lamp, and when the device is out of service or an open circuit or short circuit happens to the device, the device gives an abnormal information indication; when the device to protected fails during the power transmission process, protection is carried out with rapidity, and an action information indication is given; and the parts in contact with the operator are not provided with exposed charged terminals.

Description

Portable digital protection measure and control device

Technical field

The utility model belongs to field of relay protection in power, specially refers to a kind of portable digital protection measure and control device; When can be applicable to the power equipment operation, before new throwing main protection equipment does not carry out the on-load test, as the temporary protection device; But the real-time watch device state that puts into operation also simultaneously.

Background technology

At present, known temporary protection device is installed three current relays and a collateral and is protected the tripping operation pressing plate, draws three-phase electricity streamline and outlet tripping operation line and simple construction forms on an insulated electro keevil.There are four big shortcoming and potential safety hazards in this protective device: the one, when the temporary protection device inserts, owing to do not have measurement function and information indicating, can't guarantee whether to exist the open circuit problem that causes owing to human factor, thereby can not guarantee that temporary protection really drops into success; The 2nd, in temporary protection device demolishing process,, can't definitely guarantee the personnel's of removing personal safety because the loop is charged; The 3rd, all parts and the binding post of electric keevil temporary protection device all expose outside, in frequent handling process, cause each superstructure loosening easily, so inspection is fastening before use comprehensively, in the process of putting into operation, also cause personnel's false touch mistake to bump live terminal in addition easily; The 4th, electromagnetic relay is long than the digital protecting logic outlet time intrinsic operate time, and the accuracy of adjusting is low than digital protecting, and the ability of quick and precisely excising fault is poor than the protection of word formula.

Summary of the invention

In order to overcome the more and immeasurable deficiency of existing temporary protection device unsafe factor; the utility model provides a kind of portable digital protection measure and control device; this device can not only be protected the safety in the power equipment transmission process; the protection action more quick and precisely; and the state and send information indicating of can monitoring equipment putting into operation, and use small volume and less weight, simple to operate, safe and reliable.

The technical solution adopted in the utility model is: be≤400 * 300 * 300mm an overall dimension, divide in the aluminium alloy carrying case of adjustable four sole seats; embed four digital printing circuit boards; be respectively power insert, AC measurment plug-in unit, CPU card, logica board, can realize two-period form composite voltage locking direction overcurrent protection function.Top, cabinet front is embedded with big screen LCD, can show parameter and protection self check information such as real-time current, voltage magnitude, phase angle, protect operating conditions such as action message, protection exception information, and can utilize button to lock; The below key combination can realize the human-computer dialogue function, carries out operations such as definite value input, protection transmission, report extraction; Each color indicator light of left side can be pointed out various states such as operation, tripping operation, combined floodgate, advance notice, fault; Device reset button is used for recovering operate as normal automatically by self-resetting circuit when dead causing program to walk because of interference; Also be furnished with a data input/output interface, realize linking to each other with notebook computer.There is the working power switch at the cabinet back side; the direct current input jack is used for the input protection direct current; electric current, voltage terminal can be thrown main protection terminal board at interval in advance with protected equipment respectively and link to each other; be used to gather current and voltage quantities; rely on the throwing of four pressing plates such as " I segment protect input ", " II segment protect input ", " protection tripping operation ", " standby tripping operation " to move back, can realize the temporary protection function.

The beneficial effect that the utility model reached is:

1. outward appearance: adopt the embedded printed circuit board (PCB) of totally-enclosed cabinet, backboard flexible conductor plug-in type connected mode, integral panels is inlayed greatly, screen liquid crystal display screen, indicator light, touch key-press, and base is adjustable, and structure is attractive in appearance, and is easy to carry.

2. function: integrate protection and observing and controlling function, and extendible a plurality of CPU module, realizing more defencive functions, the scope of application is more extensive.

3. operation: friendly man-machine interface, utilize button to carry out operations such as definite value input, protection transmission, report extraction; Perfect event message is handled, and can preserve action report continuously, prints the Chinese report; Chinese character shows operating condition information, protection action message, protection self check and protection exception information in real time.

4. reliability: digital module samples precision height, the error of calculation is little, and the logic muzzle velocity is fast, and the antijamming capability of device also improves greatly.

5. fail safe: digital module samples precision height, the error of calculation is little, and the logic muzzle velocity is fast, and the antijamming capability of device also improves greatly.

Description of drawings

Fig. 1 is the utility model appearance structural representation.

Fig. 2 is the utility model device hardware principle block diagram.

Fig. 3 is the utility model back side layout plan.

Specific implementation method

Cabinet (1) is a rectangle framework and is provided with one and carries hand (8), with screw rectangle cabinet and front panel (2) are fixed together, front panel is upper left to be LCDs (4), the liquid crystal display screen downside is provided with involution button (3), panel is provided with six touch key-presss (6), front panel middle part is provided with five light emitting diode lamps (7), is respectively from top to bottom: operation, standby, tripping operation, advance notice and fault, the bottom is provided with an ISO communication port (5).

In the layout plan of this device back side, 3.1 is the ac terminal input module, specifies as follows:

A) Ia, Ian: protective current A phase input, Ia is a polar end;

B) Ib, Ibn: protective current B phase input, Ib is a polar end;

C) Ic, Icn: protective current C phase input, Ic is a polar end;

D) terminal Ua, Ub, Uc: busbar voltage A phase, B phase, C import polar end mutually;

E) terminal Un: busbar voltage input common port.

3.2 be port of export submodule, specify as follows:

A) protection tripping operation pressing plate: when pressing plate dropped into, protection tripping operation action effectively; When pressing plate withdraws from, protection tripping operation action locking;

B) standby tripping operation pressing plate: when pressing plate dropped into, standby tripping operation action effectively; When pressing plate withdraws from, standby tripping operation action locking;

C) protection tripping operation outlet: output protection tripping operation action;

D) standby tripping operation outlet: export standby tripping operation action;

3.3 be the power supply terminal module, specify as follows:

A) C45N: working power toggle switch.

B) DC220V: dc supply input section, "+" connects positive source, and "-" connects power cathode.

C) earth terminal: chassics earth.

Claims

1. a portable digital is protected measure and control device; it is characterized in that: comprise an overall dimension for≤400 * 300 * 300mm, divide into the aluminium alloy cabinet of adjustable four sole seats; case is embedded in four digital printing circuit boards, is respectively power insert, AC measurment plug-in unit, CPU card, logica board.

2. a kind of portable digital protection measure and control device according to claim 1, it is characterized in that: top, cabinet front is embedded with big screen LCD, can show real-time monitoring information and protection self check information, protection action message, protection exception information.

3. a kind of portable digital protection measure and control device according to claim 1, it is characterized in that: this device front panel left side is provided with each color indicator light and can points out operation, tripping operation, combined floodgate, advance notice and fault; A device reset button; A data input/output interface is realized linking to each other with notebook computer.

4. a kind of portable digital protection measure and control device according to claim 1, it is characterized in that: the cabinet back side is provided with this device working power switch; The direct current input jack; Electric current, voltage terminal; Four control protections are thrown and are moved back pressing plate.