One, overview
1.1. the scope of products
Digital protection measurement controller NGP-700 series of intelligent 400V power distribution system is the introduction of our company iss control of its products, high performance ARM processor hardware platform and embedded real-time operating system based on, protection, control, measurement, communication, monitoring functions in one, is a low voltage power distribution intelligent, networked, digital control products.
Characteristics of 1.2. products
The safe and reliable: the use of the latest PHILIPS high-speed ARM processor, the main processor board adopts the design of electric four layer printed circuit board, high precision AD sampling, the main components are imported device, ensuring high reliability for the electrical design, product passed the type test and electromagnetic compatibility testing strictly, guarantee the products in the harsh environment adaptability and reliability.
The highly integrated digital protection: measuring controller for design of power supply and distribution 400V. In addition to having perfect protection function, measurement function also has the electric quantity of equipment and the equipment of the programmable control functions, at the same time with a variety of communication interface, can through the field bus data and information is sent to the host computer (monitoring, dispatching computer), and accept, closing PC control command.
Structure design of the compact: the product has the advantages of small volume, compact structure, convenient installation, low voltage control cabinet is installed directly in the terminal use. Because of using field bus, changed the traditional centralized installation way of the past, can be more flexible installation control room in a single, through on-site, shielded twisted pair network.
Communication interface configuration of the rich: RS-485 communication interface with 1 standard (built-in Modbus communication protocol), suitable for field control bus
Function of configuration of 1.3. products
Product function configuration table
The product model
Product function NGP-700
Short circuit protection (current quick break protection) V
Overload protection (timing and limiting current protection) V
Overload protection (inverse time current protection) V
Negative sequence current protection (unbalance protection) V
Under voltage protection system
Overvoltage protection system
Detection of TV breaking √
The zero sequence current protection √ note 2
Three phase current protection system
Switch input / Output Programmable √
Measuring the effective value of the three-phase current tick
Three phase to ground voltage effective value v
The phase to phase voltage RMS V
Active, no power, power factor V
Switch remote control, tick
Switch input 8
The 4-20mA output √ note 1
Relay output 4
RS485 interface name
CAN BUS interface √ note 3
Note the 1:4-20mA output;
Note 2: the zero sequence current protection function matching;
Note the 3:RS485 interface and CAN-BUS interface can only choose one, not compatible

Second, the main parameters and technical indicators
2.1 Power Supply
DC220V;
Power Consumption: Normal operation, no more than 5W;
When the device action, not more than 8W.
2.2 AC current input
Rating In: 200A/100A/50A/25A/5A; (greater than 200A with an external transformer to achieve the above programs)
Measuring range: 0 ~ 10In;
Measurement error: not more than 1%.
Overload: 2In continuous work;
10In allowed to work 10s;
40In allowed to work 1s;
Power consumption: less than 0.5VA.
2.3 AC input
Ratings Un: 380V;
Measuring range: 0 ~ 1.2Un;
Measurement error: less than 1%;
Overload: 1.2Un can work continuously;
Power consumption: less than 0.5VA.
2.4 switch input
Number of channels: 8;
Working voltage: DC24V;
Input: Empty contacts or active contacts;
Isolation: Optical Isolation, isolation voltage of 2500V.
2.5 contact output
Access points: 4;
Contact capacity: Rated current 5A; rated voltage 250Vac; exchange broken arc 2000VA;
Contact type: normally open (standard), normally closed (custom).
2.6 analog output (optional)
Number of channels: 1 channel;
Output: 4 ~ 20mA current;
Error: less than 2%;
Output: programmable output is disabled by default.
 
2.7 Communication Interface
Communication interface: RS485 (standard);
CAN2.0 (standard);
Debug Interface: RS232C (standard);
Isolation type: optical isolation, with lightning protection;
Baud Rate: 1.2bps ~ 9.6Kbps (RS485)
9.6Kbps (RS232C);
Communication protocol: RS485 (Modbus) / RS232C (Internal Statute) / CAN2.0B (internal statute);
Communication medium: shielded twisted pair;
Function: RS485/CAN2.0B automation and DCS systems to communicate with, RS232C as a debugging interface, communication and NGP-700.
2.8 Environment
Normal operating temperature: -10 ℃ ~ +55 ℃;
Limit working temperature: -25 ℃ ~ +70 ℃;
Relative humidity: 5% to 95%;
Atmospheric pressure: 60kPa ~ 106kPa;
Altitude: less than 4000 m;
Protection class: IP50;