CN2098039U

CN2098039U - High-voltage test safety control chest

Info

Publication number: CN2098039U
Application number: CN 91220675
Authority: CN
Inventors: 李仁善
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-08-12
Filing date: 1991-08-12
Publication date: 1992-03-04

Abstract

Disclosed is a high-voltage test safety control box, wherein, a box body is provided with a voltage regulator, a servo motor, an operation control device and an indicating instrument which is arranged on the top surface of the box body. The utility model is provided with a safety switch or a safety stool method for controlling the on-off of a circuit. The circuit is provided with a low-voltage return circuit, a starting return circuit for emergency, sound and light alarm, and a sound and light prompt. The utility model which only starts when a worker is in a safe position and automatically cuts off power supply under the emergency can thus guarantee the personal safety of the worker who changes and connects the circuit. The high-voltage test safety control box which can provide performance tests for alternating current and direct current can be matched with the existing high-voltage test transformer.

Description

High-voltage test safety control chest

High-voltage test security personnel control box.The proving installation that belongs to electrical property.

During the high-voltage test operation,, carelessness is arranged slightly because operation and reconfiguration line are frequent, the time accident generation that jeopardizes personal safety arranged.The reason of accident can reduce three aspects, and the first is deenergization not, hot line job; It two is that high pressure is not got rid of, reconfiguration informant person false touch charging equipment; It three is when making DC high potential test, has forgotten first discharge, back reconfiguration line.In case personal injury occurred, will cause serious consequence undoubtedly.

The purpose of this utility model provides a kind of reconfiguration informant person must be at home, control box could start, after control box starts, if reconfiguration informant person leaves home, can cut off the electricity supply automatically, when making DC high potential test, behind the deenergization, but alert is discharge earlier, the high-voltage test security personnel control box of back reconfiguration line.

Solution of the present utility model is to adopt low-voltage control major loop, the switch of low-voltage is installed in below the safe stool or the foot-switch the inside, walk about with the random pinching switch of hand for fear of operating personnel, the unlatching of switch must just be moved under certain pressure, therefore the microswitch of two series connection is set, in order to ensure reconfiguration informant person's personal safety, pressure regulator is established the two kinds of programs of zero-sum servomotor self-zeroing of manually returning.After finishing as DC high potential test, with sound, light (discharge word board) alert discharge earlier, back reconfiguration line.

The utility model has the acousto-optic circuit of alarm on circuit design, have fast automatic time zero electric utility under the emergency situation, adopt low-voltage control major loop, and microswitch to could open under certain pressure, so can guarantee reconfiguration informant person's personal safety.This device can with the supporting use of existing HT testing transformer.

Accompanying drawing 1 is a shape assumption diagram of the present utility model.Accompanying drawing 2 is circuit theory diagrams of the present utility model.

The end face of shape case shell (1) divides two partly, and surface level has ground connection binding post (10) for operation control part, pressure regulator capstan (11), and reverser (15), zero load disconnecting link (16), the band lamp starts knob (17), and the band lamp stops knob (18).The dip plane is for showing partly; the binding post (2) that the external voltage table is arranged; AC/DC voltage table (3); critical demonstration red light (4); static " discharge " pilot lamp (5); electric time-keeping calculates device (6), reometer indication knob (7), alternating current ammeter (8) and panel board protection baffle plate (9).There is overcurrent relay (20) in the front of shell, disk indicating type thermometer (19), and there is the power supply multipurpose socket at the back side, and there is handle (13) two sides, there is AC servo motor SM(12 the control box the inside), pressure regulator TY(14).Electric time-keeping calculates device and disk indicating type thermometer needs to be provided with separately for adequacy test, does not include in the hierarchy of control.Seven shunt circuits are arranged between major loop 101,102.Article one, the loop is a Multi-purpose power socket, and this socket is installed in the box-type shell back side; The second loop is the touch controls loop, is in series with the normally opened contact 2KV of auxiliary reclay 2KV on this loop successively ₁, starting knob ST, the normally opened contact of auxiliary reclay 1KV stops knob 1STP, the normally closed contact 3KV of auxiliary reclay 3KV ₁, a normally closed contact KA of overcurrent relay, contactor KM, start button adds self-holding circuit; Article three, the loop is a relay control circuit, is in series with a zero-bit switch 1SET on this loop, auxiliary reclay 1KV; Article four, the loop is a low-voltage control circuit, by transformer-coupled low-pressure side two branches are arranged, exchange the microswitch startup auxiliary reclay 2KV of branch by series connection, traffic light signal is by the break-make control of contactor KM, direct current branch is by locking knob SLA control break-make, energy storage capacitor C ₁, light emitting diode VL, buzzer 2B is connected in parallel; Article five, the loop is critical startup loop, is in series with two normally closed contacts of auxiliary reclay 2KV, 1KV on this loop successively, servomotor SM, and high-voltage device 2TC is in parallel with servomotor, and low-pressure side has critical sound and light signal alarm; Article six, the loop is a DC control circuit, and the current-limiting resistance R of two series connection is arranged before and after the rectification ₄, R ₅, with resistance R ₆Capacitor C ₃Be parallel with by auxiliary reclay 3KV the loop that the normally opened contact of auxiliary reclay 1KV is formed, R ₆With R ₅Series connection; Article seven, the loop is the pressure regulator loop, is coupled to measurand by pressure regulator, is existing AC and DC HT testing transformer circuit in the frame of broken lines, and zero load disconnecting link QR is the master switch of major loop.DC control circuit, the break-make in pressure regulator loop is by KM ₅, KM ₆Two normally opened contact controls only could be worked after contactor KM adhesive.

Among the embodiment of the present utility model, the low-pressure side in low-voltage control circuit and critical startup loop is 12V, foot-switch (21) has non-slip rubber (22) with the long shielding line of a 10M below low-voltage control circuit is connected foot-switch, the shielding line joint (23) of outwarding winding then can be used safe stool instead, the minimum pressure that foot-switch or safe stool are opened is 5～7Kg, servomotor (14) only allows to rotate to the zeroing direction after repacking.High-voltage test security personnel control box adopts 220 volts of alternating voltages.Operating process is as follows: first step reconfiguration informant person stands on the foot-switch, and 2SET, 3SET connect, the zero load disconnecting link QR that closes, and green light GN is bright, and this moment, if pressure regulator TY should not in zero-bit, then manually return zero (1SET is closed on the top) in zero-bit, could start shooting.In second step, take startup knob ST(2KV off ₁, 1KV ₁Logical) the KM adhesive, KM ₅, KM ₆Connect major loop, green light GN goes out, and red light 1RD is bright, and pressure regulator is risen to the required voltage value.In the 3rd step, test finishes, and pressure regulator is depressurized to the zero-bit top closes 1SET, 1KV adhesive, 1KV ₃Logical, C ₃Pass through R ₆To 3KV discharge, the instantaneous adhesive of 3KV, 3KV ₁Disconnect KM decompression, KM ₅, KM ₆QR is drawn back in automatic cutout, sends the command of execution of reconfiguration line.When making DC high potential test, take locking knob SLA off and get final product, work as KM ₅, KM ₆After the automatic cutout, KM ₄Logical, energy storage capacitor C ₁Pass through R ₃To light emitting diode VL and buzzer 2B discharge, send sound, light " discharge " demonstration, continued for 5 seconds, alert is discharge earlier, back reconfiguration line.If reconfiguration informant person under the charged situation of testing equipment, leaves home, 2KV decompression, 2KV ₂(1KV ₂At on position), send sound (1B) light (2RD) alarm, AC servo motor (SM) promptly drives pressure regulator (TY) fly back (in 2 seconds), and cuts off major loop automatically, thereby has guaranteed reconfiguration informant person's personal safety.

Claims

1, a kind of high-voltage test security personnel control box, the proving installation of genus electrical property is characterized in that

(1) this high-voltage test security personnel control box, a box-shaped enclosure (1) is arranged, the end face of shell divides two partly, surface level is operation control part, pressure regulator capstan (11) is installed, reverser (15), zero load disconnecting link (16), the band lamp starts knob (17), the band lamp stops knob (18), the dip plane is that instrument shows that part is equipped with AC/DC voltage table (3), critical demonstration red light (4), static " discharge " pilot lamp (5), electric time-keeping calculates device (6), reometer indication knob (7), alternating current ammeter (8) and panel board protection baffle plate (9), there is overcurrent relay (20) in the front of shell, disk indicating type thermometer (19), there is Multi-purpose power socket at the back side, there is handle (13) two sides, and pressure regulator (14) is arranged in the casing, AC servo motor (12);

(2) this high-voltage test security personnel control box is parallel with low-voltage control circuit, critical startup loop between two major loops, the contactor control loop, relay control circuit, DC control circuit and pressure regulator loop, relay control circuit, two branches are arranged, exchange in the branch and microswitch 2SET, the 3SET that is connected in series arranged, auxiliary reclay 2KV, and red, green pilot lamp, locking knob SLA is arranged, energy storage capacitor C on the direct current branch ₁Light emitting diode VL, buzzer 2B, the three is connected in parallel, whole loop is by transformer 1TC coupling, microswitch 2SET, 3SET is installed in series below foot-switch or safe stool, AC servo motor (SM) and the transformer (2TC) in parallel with it are arranged on critical startup loop, transformer is paid the limit critical sound, the light alarm, auxiliary reclay 1KV, the break-make of two normally closed contact control loops of 2KV, the startup knob ST that mutual series connection is arranged on the contactor loop, auxiliary reclay 1KV, two normally opened contacts of 2KV, stop knob 1STP, the normally closed contact of auxiliary reclay 3KV and a normally closed contact of overcurrent relay, be in series with zero-bit switch 1SET and auxiliary reclay 1KV on the relay control circuit, DC control circuit and pressure regulator loop are in series with two current-limiting resistance R at the opposite side of contactor KM normally opened contact on the DC control circuit ₄, R ₅, with resistance R ₆, capacitor C ₃Be parallel with normally opened contact and the auxiliary reclay 3KV of auxiliary reclay 1KV.

2, according to the high-voltage test security personnel control box of claim 1, it is characterized in that the minimum pressure that foot-switch or safe stool are opened is 5～7Kg.

3,, it is characterized in that AC servo motor (SM) is only to the direction rotation of returning to zero according to the high-voltage test security personnel control box of claim 1.