Digital control system for EKG-8I, EKG-10, EKG-15 mine excavators
Low-voltage complete switchgear LVS EG-RC-U2 is a digital control system for open-pit excavators: EKG-8I; EKG-10; EKG-15.
Single-bucket open-pit excavators are the main machines used in coal and ore mines as the most satisfactory machines for operation in the most severe mining, geological and climatic conditions. Digital control system (LVS EG-RC-U2) is designed for microprocessor control via digital information network of main and auxiliary electric drives of shovel excavators with bucket capacity from 8 to 18 m³. It provides:
- regulated DC voltage of excitation circuits of generators according to the system "thyristor converter-generator-motor" (TV-G-D) with a two-circuit parameter slave control system and intensity setter at the system output;
- supply of stabilized current to excitation circuits of the main electric drives motors;
- pre-acceleration of four-machine converter unit to the sub-synchronous speed by the system "thyristor converter-motor" (ТP-D);
- supply of excitation current to the synchronous motor (PM) as a function of time, with subsequent automatic excitation control, depending on the value of the active component of the PM stator current;
- control of the ladle bottom opening motor by TP-D system;
- control of auxiliary mechanisms electric drives;
- required static and dynamic characteristics of main electric drives;
- feeding of light informational signals to the operator's desk in case of electric drives switched on, and also light and sound signals in case of an emergency condition of the electric equipment;
- control of relay-contactor circuit;
- diagnostics and automatic control of thyristor converters with microprocessor control.
№ | Product name | For EKG-8I | For EKG-10 | For EKG-15 | Dimensions | Масса, кг | ||
---|---|---|---|---|---|---|---|---|
Width, mm | Depth, mm | Height, mm | ||||||
1 | Main drive control cabinet | 1 | 1 | 1 | 1400 | 550 | 1900 | 550 |
2 | Static transducer cabinet | 1 | 1 | 1 | 1000 | 550 | 1900 | 400 |
3 | Contactor cabinet | 1 | 1 | 1 | 700 | 550 | 1900 | 330 |
4 | Auxiliary drives cabinet | 1 | 1 | 1 | 1300 | 550 | 1900 | 390 |
5 | Remote control chair | 1 | 1 | 1 | 760 | 815 | 1315 | 90 |
6 | Mounted cabinet | 1 | – | – | 412 | 137 | 450 | 8 |
7 | Instrument box | 1 | 1 | 1 | 250 | 92,5 | 160 | 3 |
8 | Insulation monitoring device | 1 | 1 | 1 | 265 | 68 | 250 | 2,1 |
9 | Leak relay RUP 380 RUP 220 |
1 1 |
– | 1 1 |
120 120 |
90 90 |
250 250 |
4 4 |
10 | Leak relay RUP 380 RUP 220 |
– | 1 1 |
– | 260 260 |
142 142 |
370 370 |
10 10 |
11 | Stand for PTEM adjustment* | 1 | 1 | 1 | 220 | 170 | 120 | 2,5 |
12 | Stand for TK adjustment* | 1 | 1 | 1 | 220 | 170 | 120 | 2,5 |
13 | PTEM Setting Panel* | 1 | 1 | 1 | 100 | 50 | 180 | 0,37 |
* – after-sales service.
The switchgear and controlgear assembly is designed as four main cabinets. All cabinets are single-sided. On the front side the cabinets have doors equipped with special locks. On the roofs of the cabinets there are eye bolts. When installed on site the bolts can be removed, and the holes freed are used for additional attachment of cabinets to the walls of the excavator body. Inside the cabinets are control and protection equipment. Gauges and light signaling lamps are installed on cabinet doors and rotary panels. It is possible to combine the control panel, joysticks with the operator's seat. In the bottom part of cabinets there are terminal blocks for connection of external installation cables. Cables are led through the open apertures of lower frames. Grounding of cabinets is performed through external and internal grounding clamps, located in the right or left bottom part of cabinets. Upon agreement with the customer, transformers are included in the package of low-voltage switchgear and controlgear assemblies.
№ | Parameter | Usage in LVS | ||||
---|---|---|---|---|---|---|
Generator exciters | Engine exciters | Acceleration – bucket opening | SD exciter | Цепи управления | ||
1 | Control circuits | TSZM-16-74.ОМ5 | TSZM-16-74.ОМ5 | TSZM-16-074.ОМ5 | TSZM-16-074.ОМ5 | TSZI-2,5 |
2 | Rated power, kVA | 16 | 16 | 16 | 16 | 2,5 |
3 | Primary winding voltage, V | 380 | 380 | 380 | 380 | 380 |
4 | Secondary winding voltage, V | 220 | 220 | 220 | 36 | 72 |
5 | Rated secondary current, V | 40,8 | 40,8 | 40,8 | 245 | 19,3 |
6 | Схема соединений обмотки | Y/Y o | Y/Y | Y/Y | Y/Δ | Y/Δ |
7 | Quantity, pcs | 3 | 1 | 1 | 1 | 1 |
8 | Mass, kg | 145 | 145 | 145 | 145 | 31 |
The control circuit transformer S=2.5 kVA is included in the delivery. The following may be included in the scope of supply at the customer's request:
- A set of high-voltage and low-voltage cable products.
- High-voltage switchgear-6R-U2 cell (mounted on excavator platform).
- Switching unit KRU-6RPP-U1 (YaKNO).