CN102646955A - Comprehensive protecting device for coal mine power center - Google Patents

Abstract

The invention relates to a comprehensive protecting device for a coal mine power center, which belongs to the technical field of coal mine power center protecting devices, and aims to realize low-voltage-side detection and high-voltage-side tripping projection. The technical scheme includes that a three-phase incoming line end of an isolation reversing switch SW1 is connected with one end of each of a mutual reactor L1, a mutual reactor L2 and a mutual reactor L3, the other ends of the mutual reactor L1, the mutual reactor L2 and the mutual reactor L3 are parallelly connected to be connected with an input end of an electricity leakage protecting module, a current transformer CT01 and a current transformer CT02 are respectively serially connected in an optional two-phase line of a ligature between a mining explosion-proof dry-type transformer T1 and the isolation reversing switch SW1, a signal output end of each of the current transformer CT01 and the current transformer CT02 is connected with an input end of an overcurrent protector, and a failure signal port of the overcurrent protector is connected with a failure signal port of a high-voltage comprehensive protector. The comprehensive protecting device is applicable to the field of coal mines.

Description

Power center (PC), colliery comprehensive protector

Technical field

Power center (PC), colliery of the present invention comprehensive protector belongs to power center (PC), colliery protective device technical field.

Background technology

The power center (PC) of using under the mine at present comprises: high voltage distribution installation, mine explosion-suppression dry-type transformer and low tension switch control device, and traditional safeguard measure thinking is: low pressure detects, the low-voltage tripping protection; High pressure detects, the high-voltage trip protection; High high voltage distribution installation and low tension switch work alone separately, organically do not connect, and on high-tension side protection action is not controlled by low-pressure side; Simultaneously, the various fault-signals of low-pressure side can not be transferred to the high-pressure side, the action of control high-pressure vacuum breaker.

It is independent separately that the whole design idea of power center (PC), colliery also rests on high voltage power distribution, transformer, low-voltage distribution; Original thinking of compartment; Just be integrated into one the three in form; Be unfavorable for that the power center (PC) as an integral device reliable work, is prone to cause equipment fault, cause the equipment integral reliability to reduce.

Summary of the invention

Power center (PC), colliery of the present invention comprehensive protector, technical problem to be solved is: provide a kind of low-pressure side that can realize to detect power center (PC), the colliery comprehensive protector of high-pressure side trip protection.

For solving the problems of the technologies described above; The technical scheme that adopts is: power center (PC), colliery comprehensive protector, and the power center (PC), colliery is by being installed in high-voltage vacuum distribution equipment in the mining high-voltage vacuum distribution box, being installed in the mine explosion-suppression dry-type transformer T1 in the mine anti-explosion transformer tank and the low tension switch control device that is installed in the low tension switch control cabinet of mine anti-explosion power center (PC) constitutes; Said high-voltage vacuum distribution equipment is made up of with the high pressure comprehensive protection device of the control high-pressure vacuum breaker GD1 break-make that links to each other with high-pressure vacuum breaker GD1 high-pressure vacuum breaker GD1, and said low tension switch control device includes the PLC that isolates reversing switch SW1 and the control isolation reversing switch SW1 that links to each other with isolation reversing switch SW1;

The input of said mine explosion-suppression dry-type transformer T1 links to each other with the leading-out terminal of high-pressure vacuum breaker GD1; The output of mine explosion-suppression dry-type transformer T1 links to each other with the end of incoming cables that isolates reversing switch SW1; The leading-out terminal of isolating reversing switch SW1 links to each other with the end of incoming cables of relay K M1; Be serially connected with current transducer CT11, CT12 and CT13 respectively in the three-phase outlet line of relay K M1, the signal output part of said current transducer CT11, CT12 and CT13 all links to each other with the input of PLC;

The three-phase end of incoming cables of said isolation reversing switch SW1 links to each other with the end of mutual reactor L1, L2 and L3 respectively; The other end of said mutual reactor L1, L2 and L3 and connect the back link to each other with the input of leakage protection module, said leakage protection module links to each other with PLC;

Said low tension switch control device also includes overcurrent protector, current transformer CT01 and CT02; Said current transformer CT01 and CT02 are serially connected in mine explosion-suppression dry-type transformer T1 respectively and isolate any two mutually in the circuit of line between the reversing switch SW1, and the signal output part of current transformer CT01 and CT02 all links to each other with the input of overcurrent protector;

Said low tension switch control device is provided with fault contact K1, and the fault-signal port of said overcurrent protector links to each other with the fault-signal port of high pressure comprehensive protection device, and fault contact K1 is serially connected between the fault-signal port of overcurrent protector.

Said low tension switch control device also includes DC power supply, and the power port of said overcurrent protector and PLC all links to each other with the output port of power source of DC power supply.

The casing of said mine anti-explosion power center (PC) low tension switch control cabinet is provided with the explosion-proof type cable connector, and said relay K M1 links to each other with colliery power consumption equipment motor through the explosion-proof type cable connector.

The beneficial effect that the present invention compared with prior art has is: the present invention realizes that low pressure detects, the high-voltage trip protection through on the control circuit of mine anti-explosion power center (PC), installing above-mentioned safeguard measure additional; Aforesaid way and traditional low pressure detect, and the mode of low-voltage tripping relatively has reliablely, can effectively protect advantages such as low-voltage device and transformer.

Description of drawings

Do further detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention:

Fig. 1 is an electrical block diagram of the present invention;

Among the figure: 1 is that mining high-voltage vacuum distribution box, 2 is that mine anti-explosion transformer tank, 3 is that mine anti-explosion power center (PC) low tension switch control cabinet, 4 is that high pressure comprehensive protection device, 5 is that DC power supply, 6 is that overcurrent protector, 7 is that PLC, 8 is that leakage protection module, 9 is that explosion-proof type cable connector, 10 is a colliery power consumption equipment motor.

Embodiment

As shown in Figure 1; Power center (PC), colliery of the present invention comprehensive protector, the power center (PC), colliery is by being installed in high-voltage vacuum distribution equipment in the mining high-voltagevacuum distribution box 1, being installed in the mine explosion-suppression dry-type transformer T1 in the mine anti-explosion transformer tank 2 and the low tension switch control device that is installed in the mine anti-explosion power center (PC) low tension switch control cabinet 3 constitutes; Said high-voltage vacuum distribution equipment is made up of with the high pressure comprehensive protection device 4 of the control high-pressure vacuum breaker GD1 break-make that links to each other with high-pressure vacuum breaker GD1 high-pressure vacuum breaker GD1, and said low tension switch control device includes the PLC7 that isolates reversing switch SW1 and the control isolation reversing switch SW1 that links to each other with isolation reversing switch SW1.

The input of said mine explosion-suppression dry-type transformer T1 links to each other with the leading-out terminal of high-pressure vacuum breaker GD1; The output of mine explosion-suppression dry-type transformer T1 links to each other with the end of incoming cables that isolates reversing switch SW1; The leading-out terminal of isolating reversing switch SW1 links to each other with the end of incoming cables of relay K M1; Be serially connected with current transducer CT11, CT12 and CT13 respectively in the three-phase outlet line of relay K M1, the signal output part of said current transducer CT11, CT12 and CT13 all links to each other with the input of PLC7.

The three-phase end of incoming cables of said isolation reversing switch SW1 links to each other with the end of mutual reactor L1, L2 and L3 respectively; The other end of said mutual reactor L1, L2 and L3 and connect the back link to each other with the input ofleakage protection module 8, saidleakage protection module 8 links to each other with PLC7.

Said low tension switch control device also includes overcurrent protector 6, current transformer CT01 and CT02; Said current transformer CT01 and CT02 are serially connected in mine explosion-suppression dry-type transformer T1 respectively and isolate any two mutually in the circuit of line between the reversing switch SW1; A kind of mode wherein that Fig. 1 adopts; Current transformer CT01 and CT02 be connected in series respectively A mutually with the C circuitry phase in, the signal output part of current transformer CT01 and CT02 all links to each other with the input of overcurrent protector 6; Said low tension switch control device is provided with fault contact K1, and the fault-signal port of said overcurrent protector 6 links to each other with the fault-signal port of high pressure comprehensive protection device 4, and fault contact K1 is serially connected between the fault-signal port of overcurrent protector 6.

Said low tension switch control device also includesDC power supply 5, and the power port of said overcurrent protector 6 and PLC7 all links to each other with the output port of power source ofDC power supply 5.

The casing of said mine anti-explosion power center (PC) low tension switch control cabinet 3 is provided with explosion-prooftype cable connector 9, and said relay K M1 links to each other with colliery powerconsumption equipment motor 10 through explosion-prooftype cable connector 9.

The present invention is after power center (PC) low pressure inlet wire side installs current transformer CT01, CT02 and overcurrent protector 6 additional; Inlet wire side total current is realized monitoring; When over current fault occurring and reaching set point, overcurrent protector 6 is delivered to high pressure comprehensive protection device 4 with fault-signal, 4 actions of high pressure comprehensive protection device; Break off high-pressure vacuum breaker GD1, the power supply of cutoff high main circuit; Main circuit mutual reactor L1, L2, L3 through to low pressure inlet wire side carry out leakage current detect to main circuit; When leak current fault occurring,leakage protection module 8 is delivered to PLC7 with fault-signal, PLC7 control fault contact K1 action; The guard signal line is delivered to high pressure comprehensive protection device 4 with switching signal; 4 actions of high pressure comprehensive protection device are broken off high-pressure vacuum breaker GD1, the power supply of cutoff high main circuit.

The present invention is every all equipped mutually current transducer on the circuit of power center (PC), colliery load-side; By the current conditions of the real-time monitoring load of PLC7, during as if faults such as appearance event short circuit, overload, three-phase imbalances, PLC7 control fault contact K1 action; The guard signal line is delivered to high pressure comprehensive protection device 4 with switching signal; 4 actions of high pressure comprehensive protection device are broken off high-pressure vacuum breaker GD1, the power supply of cutoff high main circuit.

Above-mentioned high pressure comprehensive protection device 4 selects to use the high pressure comprehensive protection device of model as GZBD-1 according to the side circuit needs; This high pressure comprehensive protection device adopts advanced single-chip microcomputer and control circuit thereof; Can accurately judge high and low pressure fault and safety detection sampled signal; Output in time drives the vacuum circuit-breaker signal, guarantees the reliability of protective device.

The present invention through the signal protection line, realizes that with the fault-signal of low-pressure side low pressure detects, the high-voltage trip protection through on the control circuit of mine anti-explosion power center (PC), installing above-mentioned safeguard measure additional; Aforesaid way and traditional low pressure detect, and the mode of low-voltage tripping relatively has reliablely, can effectively protect low-voltage device and transformer, guarantees advantages such as load equipment Electrical Safety.

Claims (3)

1. power center (PC), colliery comprehensive protector, the power center (PC), colliery by be installed in the high-voltage vacuum distribution equipment in the mining high-voltage vacuum distribution box (1), the mine explosion-suppression dry-type transformer T1 that is installed in the mine anti-explosion transformer tank (2) constitutes with the low tension switch control device that is installed in the mine anti-explosion power center (PC) low tension switch control cabinet (3); Said high-voltage vacuum distribution equipment is made up of the high pressure comprehensive protection device (4) of high-pressure vacuum breaker GD1 and the control high-pressure vacuum breaker GD1 break-make that links to each other with high-pressure vacuum breaker GD1, and said low tension switch control device includes the PLC (7) that isolates reversing switch SW1 and the control isolation reversing switch SW1 that links to each other with isolation reversing switch SW1;

It is characterized in that: the input of said mine explosion-suppression dry-type transformer T1 links to each other with the leading-out terminal of high-pressure vacuum breaker GD1; The output of mine explosion-suppression dry-type transformer T1 links to each other with the end of incoming cables that isolates reversing switch SW1; The leading-out terminal of isolating reversing switch SW1 links to each other with the end of incoming cables of relay K M1; Be serially connected with current transducer CT11, CT12 and CT13 respectively in the three-phase outlet line of relay K M1, the signal output part of said current transducer CT11, CT12 and CT13 all links to each other with the input of PLC (7);

The three-phase end of incoming cables of said isolation reversing switch SW1 links to each other with the end of mutual reactor L1, L2 and L3 respectively; The other end of said mutual reactor L1, L2 and L3 and connect the back link to each other with the input of leakage protection module (8), said leakage protection module (8) links to each other with PLC (7);

Said low tension switch control device also includes overcurrent protector (6), current transformer CT01 and CT02; Said current transformer CT01 and CT02 are serially connected in mine explosion-suppression dry-type transformer T1 respectively and isolate any two mutually in the circuit of line between the reversing switch SW1, and the signal output part of current transformer CT01 and CT02 all links to each other with the input of overcurrent protector (6);

Said low tension switch control device is provided with fault contact K1; The fault-signal port of said overcurrent protector (6) links to each other with the fault-signal port of high pressure comprehensive protection device (4), and fault contact K1 is serially connected between the fault-signal port of overcurrent protector (6).

2. power center (PC), colliery according to claim 1 comprehensive protector; It is characterized in that: said low tension switch control device also includes DC power supply (5), and the power port of said overcurrent protector (6) and PLC (7) all links to each other with the output port of power source of DC power supply (5).

3. power center (PC), colliery according to claim 1 and 2 comprehensive protector; It is characterized in that: the casing of said mine anti-explosion power center (PC) low tension switch control cabinet (3) is provided with explosion-proof type cable connector (9), and said relay K M1 links to each other with colliery power consumption equipment motor (10) through explosion-proof type cable connector (9).

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