Decentralized Distribution Automation Distribution Terminal Unit-ZT-D30F

Main functions and characteristics

1) Electrical parameter acquisition: Real-time collection of electrical parameters such as voltage, current, zero-sequence voltage, zero-sequence current, power, power factor, and frequency.

2) Switch status monitoring: Monitor the open and closed states of circuit breakers, load switches, isolating switches, and other equipment.

3) Short-circuit fault detection: Detect short-circuit and ground faults in the line, automatically isolate the faulty section, and reduce the scope of power outages.

4) Remote opening and closing: Control the opening and closing operations of circuit breakers or load switches via remote commands.

5) Data Processing: Analyze and process the collected data.

6) Self-Diagnosis and Maintenance: Automatically detect the equipment status, promptly identify faults, and support remote upgrades and maintenance.

7) Sequence of Events (SOE) recording: Record the precise time sequence of events such as switch position changes and protective actions.

8) Communication Function: Exchange data with the main station or other terminals, and support multiple communication protocols such as IEC60870-5-101/104, DNP3, etc.

9) Alarm function: Trigger local and remote alarms when abnormalities are detected (such as overcurrent, overvoltage, communication interruption,etc.).

10) Intelligent load management: Optimize load distribution based on load demand and price signals.

Technical parameter

1. Environmental Conditions

Operating temperature: -40°C - 70°C, relative humidity: 10% - 100%
2. Operating Power Supply

Common Unit: DC 24V
Bay Unit: DC 24V
3. Measurement and Control Capacity

1) Bay Unit: Each bay unit can collect 3 phase voltages, 1 zero-sequence voltage, 3 phase currents, and 1 zero-sequence current. It can also collect 7 telemetry signals and features one control circuit for remote operation of opening and closing, as well as one protection circuit for remote operation of opening and closing.
2) Common Unit: Capable of simultaneously forwarding data from up to 22 bay units, and also has the ability to collect 5 telemetry signals on its own.
4. Measurement Accuracy

Current,Voltage: Class 0.5
Power: Class 1
5. Communication Interface

The Bay Unit is equipped with 2 Ethernet ports and 1 RS-232 maintenance serial port, among other external interfaces.
The Common Unit is configured with a remote wireless communication module, and includes 3 Ethernet ports, 4 serial communication interfaces (3 RS-485, 1 RS-232), and 1 RS-232 maintenance serial port, among other external interfaces.
6. Communication Protocol

The device supports protocols such as IEC 60870-5-101, IEC 60870-5-104, CDT92, DNP 3.0, and MODBUS. It can also meet special requirements for dual IP and dual MAC addresses as requested. Additionally, it has the capability to access self-description information of bay units based on standards such as DL/T 860 (IEC 61850).
7. Terminal Power Consumption

When the Bay Unit is operating normally, the DC power consumption should preferably be ≤ 10W;
When the Common Unit is operating normally, the DC power consumption should preferably be ≤ 15W (excluding the power supply for the communication module and the power management module).
8. Backup Power Supply Method

48V Lead-Acid Battery / Supercapacitor
9. DTU Connection Method

Rectangular Connector
10. Mean Time Between Failures(MTBF)

≥50000h

Size Description

Bay Unit: Height 160 × Width 220 × Depth 90