Low-Voltage Protection Box

Mine & Mobile Transformer Substation, Explosionproof, Low-Voltage,Protection Box,It adopts blue-backlight Chinese LCD display

 

Mine & Mobile Transformer Substation Explosionproof Low-Voltage Protection Box

Applications

The low-voltage protection box is suitable to support the high-voltage vacuum switch produced by our factory and dry transformer with the capacity of 1600kVA under the coal well with methane, other explosive dangerous gases and coal soot. Its also suitable for protection of the power supply circuit and electric appliances in case of electricity leakage, leakage lockout, short circuit, overload, undervoltage and other failures. Besides, it can be used in the 660V electrical voltage system. In order to satisfy the need of customers, the protection box is fixed with quadruple-circuit outgoing lines on its both sides.The protection box is supported by the micro-computer integrated protector based on advanced technology, which can improve reliability of the whole system.The operation mode of high-voltage bounce in the low-voltage side can not only solve many problems during mobile and transforming operation, but also solve the dead-zone problem of leakage in the circuit from the transformer low-voltage winding to the low-voltage feeding switch and failure of breaking fault points.As a result, its widely welcomed by customers.

 

Features

1. The advanced CPU technology is adopted in the protector, which has enhanced function independence of individual parts and practicability of the system.Besides, the high-resolution A/D converter and the detection method of single measuring range are also used in the device, which has greatly enhanced the accuracy of data collection;

2. It adopts blue-backlight Chinese LCD display, which enables data display and all operations more intuitive;

3. It has the function of detection and display of the power factor and degree of imbalance between the phases as well as display of electricity consumption(active component) and real-time clock and so on;

4. It can provide protection in such cases as overload, short circuit, electricity leakage, insulation monitoring, overvoltage, undervoltage, three-phase imbalance etc.;

5. It has the RS485 communication function, which can network 2~999 protectors into the LAN or Internet with connectors.

 

Main technical parameters

Rated working voltage (Ue), V	1140660
Highest working voltage, V	1200      690        33001200690
Rated working frequency, Hz	50             50
Rate current in the major loop, (Ie), A	800            630           800
Rate current in the branch loop, A	400            315           400