Five, the equipment
( I) DW01 power supply, instrument control screen
The control screen is an iron double-layer matte dense grain spray-painted structure and an aluminum panel. Provide AC power, high-voltage DC power, low-voltage DC power and various test instruments for experiments. The specific functions are as follows:
1.Main control function board
(1) Three-phase four-wire power input, after the leakage protector, through the main switch, the contactor operates through the start and stop buttons;
(2) Three 450V pointer AC voltmeters are provided to indicate the three-phase voltage of the power input;
(3) Timer and alarm recorder (service manager), usually used as a clock, with functions such as setting experimental time, timing alarm, cutting off power, etc .; can also automatically record leakage alarms and meters caused by wiring or operation errors The total number of over-range alarms provides a uniform standard for the assessment of students' practical skills.
2. AC and DC power supply
(1) Excitation power: DC 220V / 0.5A, with short circuit protection.
(2) Armature power supply: DC 0 ～ 220V / 2A continuous adjustable power supply with short circuit protection.
(3) DC stabilized power supply: ± 12V / 0.5A two ways, + 5V / 0.5A one way, with short-circuit soft-cut auto-recovery protection function.
(4) AC power: ① There is a set of transformers. The primary side of the transformer can be added with 220V or 380V AC power according to different wiring. After closing the switch, the secondary side of the transformer can output 36V, 110V, 20V, 20V. AC voltage of 12V, 6.3V; ② A set of single-phase voltage regulator can get AC 0 ～ 250V adjustable voltage; ③ The control panel is provided with single-phase three-pole 220V power socket and three-phase four-pole 380V Power outlet.
3, AC and DC instruments
(1) AC voltmeter: 0 to 500V One AC voltmeter with mirror, accuracy class 1.0.
(2) AC voltmeter: 0 to 5A A mirrored AC ammeter with accuracy class 1.0, with functions such as over-range alarm, indication, and cut off of the main power supply.
(3) Power and power factor meter: It consists of microcomputer, high-precision A / D conversion chip and full digital display circuit. Man-machine dialogue function control mode is realized through key control and digital display window. In order to improve the measurement range and test accuracy, the eight gear zones are equally divided on the hardware and software, and the gears are automatically determined and shifted. Power measurement accuracy is 1.0 grade, voltage and current ranges are 450V and 5A respectively. When measuring the power factor, it can also automatically determine the nature of the load (inductive display "L", capacitive display "C", pure resistance is not displayed), 15 groups can be stored Data for review at any time.
(4) DC voltmeter: 1 DC digital voltmeter, measuring range 0 ～ 300V, three and a half digital display, input impedance is 10MΩ, accuracy class 0.5.
(5) DC ammeter: 1 DC digital ammeter, measuring range is 0 to 5A, three and a half digital display, accuracy class 0.5, with functions such as over-range alarm, indication, cut off the total power and so on.
4, rectifier diode: IN5408 four
(II) Experimental table <br /> The experimental table is an iron double-layer matte dense-grain spray-painted structure, and the table top is fireproof and waterproof, while it is made of high-density board, with a solid structure and beautiful appearance. There are two drawers (with locks) on the left and right of the table.
(Three) experimental components
1 . DW-01 Maintenance Electrician Training Module (1)
The hanging box is equipped with thermal relay, AC contactor 380V, button indicator light (6.3V), terminal block and so on.
2 . DW-02 Maintenance electrician training components (2)
The hanging box is equipped with spiral fuses, in-line fuses, low voltage circuit breakers, time relays, AC contactors, terminal blocks, etc.
3． DW-03 Maintenance electrician training components (3)
The hanging box is equipped with spiral fuses, transfer switches, solenoid valves, cross switches, and travel switches.
4. DW-04 Maintenance electrician training components (5)
The hanging box is equipped with an AC overcurrent relay, a DC overcurrent relay, a rectifier, a fluorescent tube, and a terminal block.
5. DW-05 Electrical Skills Training Module (4)
Provide two sets of 90Ω × 2 / 1.3A disk resistance; one set of 900Ω × 2 / 0.41A disk resistance.
6. PLC host box <br /> /> With Mitsubishi FX1N-40mR host, integrated digital I / O (24 digital inputs, 16 digital outputs), RS-422 communication port, SC-09 communication programming cable and transfer I / O ports, switches, etc. Random configuration simulation teaching software and industrial control configuration software.