KYGD-1140V (690V, 380V) mine general type low voltage switch cabinet

1, product uses

KYGD ordinary mine low voltage vacuum switch cabinet is mainly used in low gassy mine shaftbottom and total air inlet duct and the main wind tunnel, the electromechanical cave room as substation low pressure side of the line, feeder and hoist (low pressure) control.

2, the use of the environment

A. elevation of not more than 1000 meters (more than 1000 meters insulation level required by the provisions of the GB311.1 amendment);

B. ambient temperature: -5 to +40;

The relative humidity around C. is not more than 95% (+25 C);

D. coal mine without gas;

E. where there is no significant shake and shock vibration;

F. can prevent dripping places;

The g. level is not more than 15 degrees.

3, product model meaning

3.1 product type

Switch cabinet for mine general type, marked "KY".

4, the main technical parameters

A. rated voltage: 1140V, 660V

B. rated current: 100A, 150A, 200A, 315A, 400A, 500A, 630A, 800A, 1250A,, 1600A,

C. rated frequency: 50Hz

D. rated short circuit breaking capacity: 1140V:12.5KA

E. one time limit through breaking capacity: 1140V:25KA

F. shell protection class: IP21

5, the main technical performance

The main technical performance of the switchgear conforms to the provisions of the GB12173 ordinary mine electric equipment, electric clearance, climb distance and resistance to heat and humidity are in line with the provisions 3-2000 gb3836.1. Power distribution cabinet by 22 different route scheme. Can be flexible combination, main components are the new technology products and the introduction of technology for the production of products, with high breaking capacity, safe and reliable, suitable for coal mine with rated voltage 1140V and 660V Power supply system requirements.

According to the needs of the user can supply CKZ series vacuum circuit breaker. WCW1 universal breaker, WCWM1 molded case circuit breaker and CKJ series vacuum contactor. Also the switch cabinet selection the mine feeder switch dedicated ZLDB-3X (T) intelligent Chinese display comprehensive protector. It adopts the advanced microprocessor and infrared remote control technology and high precision data processing and advanced protection algorithm, with protection of high precision, fast reaction speed, etc.. Can achieve total switch protection and switch selective leakage protection, earth leakage lockout, overload and short circuit, three-phase unbalance, less pressure and various protecting functions.

At the same time with the communication interface and control system connection, according to the needs of users can be equipped with RS-485 communication interface.

6, electrical principle: by the electrical schematic diagram of a knowledge power transformer once the circuit breaker once side 1140V or 660V, two times 36V, 220V, 40V, respectively, as a comprehensive protector and circuit breaker power.

Overcurrent protection circuit signal by the current to voltage converter (TA1~3) provided flow signal (rated primary current / secondary to 5V) leakage protection for external DC, AC 50V integrated access converter terminal 5,6, again after being rectified one ground, another by the sampling resistance, terminal 12 -- reactor BL2, BL1 -- through a three-phase reactor sk connected to the grid. If any phase of the electric network to ground leakage, leakage resistance smaller is leakage detection current more, on the sampling resistance pressure drop is increased, when the leakage action setting value protect action.

7, product structure

The upper part of the front door is the instrument room, the middle is the isolating switch, and the lower part is the circuit breaker chamber and the cable in and out.

8, installation and use

Power distribution cabinet before installation, first of all, we should check the packaging is intact, electrical components is damaged or loose, and check the random file, distribution cabinet is consistent with the drawings; the position of installation is selected, you must check according to the drawings, technical data, size whether matched with the load and according to the actual tuning range adjustment to give; power distribution cabinet before the operation, the cabinet should leave of more than 800mm maintenance channel.