Recloser 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 electrical distribution cabinet systems identify transient and permanent line faults. Outdoor 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.

Recloser 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 recloser controller and remote

metering

11 Remote programmable Remote input support programmable

Recloser 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

Recloser 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 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

Recloser 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 recloser controller box is small, the requirement of communication rate is low, and the requirement of reliability is high.