Control Box-Feeder Terminal Unit

The feeder terminal unit(FTU) is a new HV switch control device of control cabinet enclosures equipped with both the imported DSP high-speed sampling chips and the high-performance ARM chips, and can fast and stably finish the monitoring on the switch.

Industrial feeder remote terminal unit by our electric power equipment company has such functions as the protection, measuring, controlling, monitoring, communication, remote control, and so on and features high integration level, flexible configuration, and user-friendly interface. Electrical control cabinet are widely applied to the radiant and ring network power supply systems.

FTU outdoor control electrical control box can help the systems identify transient and permanent line faults. Outdoor electrical control box eliminate the impact of transient line faults automatically, isolate the permanent fault segments to avoid prolonged power failure in a large area, and automatically recover the power supply in fault-free areas, so as to realize the automation of power distribution network in an economical and practical way.

Control Box-feeder Remote Terminal Unit Key Functions

S/N Functions Remarks

1. Three section protection Each protection can be vote back independently

2. Over-current count protection Failure time count, output after meeting the number of

times, output mode is optional

3. Zero-sequence protection Output options: exit, alarm and tripping

4. Pre - voltage fault protection Protection can be accelerated when combined at fault

point

5. Post-reclosing acceleration Vote back independently

6. Constant time-lag The protection time is fixed

7. Inverse time limit Multiple protection curves optional

8. Ring network protection Hardware needs to configure double PT

9. Event Log The recording time is exactly millisecond

10. Status enquiry The main content is remote control and remote

metering

11. Remote programmable Remote input support programmable

Control Box-Feeder Terminal Unit Communication Protocols

S/N Protocols Remarks

1. IEC60870-5-101 balanced

2. IEC60870-5-101 unbalanced

3. IEC60870-5-104

4. DNP3.0 Now support level 3

5. Modbus

Control Box-feeder Remote Terminal Unit Technical Parameters

No. Items Rated value Remarks

1. Operating ambient temperature -40 ~ +85℃

2. Environmental relative humidity 10 ~ 100%

3. Maximum absolute humidity 35g/m3

4. Atmospheric pressure 66~ 108kPa

5. Working voltage AC220V±20%

6. Working voltage frequency 50HZ±5HZ

7. Power consumption ≤15W

8. Protective exit time <35ms Protect inherent action time at 1.5 times fixed value

9. Insulation impedance >100MΩ/ DC500V 1. External terminal to ground

2. Power circuit to ground

3. On-off input circuit to ground

4. Output circuit to ground

5. AC circuit to ground

6. AC circuit and power circuit

7. Between on-off input circuit and output circuit

10. Power frequency withstand voltage 2k Power circuit to ground

500 On-off input circuit to ground

500 Output circuit to ground

2k AC circuit to ground

2k AC circuit and power circuit

1500 Between on-off input circuit and output circuit

11. Impulse withstand voltage 5k Power circuit to ground

1k On-off input circuit to ground

1k Output circuit to ground

5k AC circuit to ground

5k AC circuit and power circuit

1k Between on-off input circuit and output circuit

Control Box-feeder Remote Terminal Unit Characteristic Functions

Feeder terminal unit is small in size and large in quantity. FTU electrical control cabinet is equipped with a transmitter for direct AC sampling. It is resistant to high temperature and cold and is suitable for outdoor harsh environments.

Unlike the scada remote terminal unit, the amount of data collected by FTU electronic control box is small, the requirement of communication rate is low, and the requirement of reliability is high.

FTU outdoor control box can be manufactured by a high-performance single-chip microcomputer. In order to adapt to the harsh environment, industrial chips that can work at 75 ℃ shall be selected, and they shall be protected against lightning, rain and moisture through appropriate structural design.

Control Box-feeder Remote Terminal Unit Application

At present, feeder terminal units power control box as one popular type of distribution electrical box have been widely deployed in column switches, ring network cabinets, switching stations, power control boxes, and other places on the distribution network line to realize the "three remote" automation functions of remote signaling, telemetry and remote control of remote primary equipment.

As an information and data communication tool, a computer network provides a powerful communication means for industrial electrical cabinet and provides a reliable basis for realizing the networked control of distribution automation system devices. Fieldbus technology and GPRS wireless communication technology inject new vitality into the implementation of feed automation. Driven by network, communication and other information technologies, distribution automation is developing from spontaneous Island automation to unified and systematic comprehensive automation.