Description

ALSTOM DAP232 digital distribution automation and protection relay

Overview

ALSTOM DAP232 (full order No. 590.043150) is a highly integrated and powerful digital protection relay in the VAMP series of ALSTOM (whose grid business has now been merged into Hitachi Energy). This device is specially designed for medium-voltage distribution networks (typically ranging from 6kV to 36kV), integrating protection, control, measurement and monitoring functions. It is a key equipment for building intelligent and automated distribution networks.

The core role of DAP232 is to act as an “intelligent guardian” for distribution lines, cables, transformers and busbars. It can not only quickly isolate faults and protect power equipment from damage, but also significantly improve power supply reliability and fault recovery efficiency through its advanced automation functions, such as automatic reclosing and fault location, reducing the duration and scope of power outages.

Core features and advantages

1. Comprehensive protection function package
Overcurrent protection: It offers multi-stage overcurrent protection including instantaneous, time-limited, and inverse-time (in accordance with standard IEC and IEEE characteristic curves) to deal with various short-circuit faults.

Directional overcurrent protection (optional) : It can be used in ring network systems to accurately determine the direction of fault current, achieve selective protection, and prevent over-level tripping.

◦ Ground fault protection: It provides sensitive protection based on residual current (zero sequence current) or directional ground faults, effectively dealing with single-phase ground faults.

Automatic reclosing: Equipped with a powerful automatic reclosing logic (supporting up to 4 reclosing operations), it can effectively eliminate transient faults and is a core function for enhancing the reliability of power supply in distribution networks.

Circuit breaker failure protection: When the circuit breaker fails to operate, the backup trip is activated to prevent the fault from expanding.

2. Advanced distribution network automation functions:
◦ Fault Detection, Location and Isolation (FDIR) : In conjunction with the superior master station or other relays, it can automatically locate and isolate the faulty section and restore power supply to the non-faulty section.

Voltage/frequency protection: It provides under-voltage, over-voltage, under-frequency and over-frequency protection, and is suitable for distribution networks with distributed energy access.

DAP232-590.043150

3. Powerful measurement and diagnostic capabilities:
High-precision measurement of all basic electrical parameters, including phase/line current, voltage, frequency, active/reactive power, power factor, energy, etc.

Built-in fault recording and sequential event recording (SOE) functions with time scales provide irreplaceable data support for accident analysis and system performance evaluation.

Monitor the operation frequency and health status of circuit breakers to support predictive maintenance.

4. Flexible communication and integration
It supports multiple standard communication protocols, such as IEC 60870-5-101/104, DNP3.0, and Modbus (via serial port or Ethernet port), enabling seamless integration into various distribution automation (DA) systems and SCADA systems.

It provides rich programmable digital input and output for receiving remote commands, status signals, and controlling devices such as circuit breakers and disconnectors.

5. User-friendly operation and configuration
The front panel is equipped with a clear LCD display and navigation buttons, facilitating on-site viewing of real-time data, alarm information and basic operations.

With the dedicated VAMPSET configuration software, complex protection function configuration, logic programming and value management can be easily completed through a graphical interface, greatly simplifying engineering debugging and maintenance work.

Typical application fields

DAP232 is an ideal choice for distribution network automation and is widely used in:

• Public utility power grid: Protection and control of 10kV/35kV overhead lines and cable feeders, used for substation outgoing lines, pole-mounted switches, and ring main units (RMUs).

• Industrial field: Protection of main power distribution systems in factories, power distribution lines in workshops, incoming lines and tie switches.

• Infrastructure: Protection and automation of distribution networks for key facilities such as airports, railways, hospitals, and data centers.

• Renewable energy: Protection of collection lines for wind farms and photovoltaic power stations.

Summary of Technical Specifications

• Manufacturer: ALSTOM (VAMP series, now part of the Hitachi Energy product line)

Model: DAP232

• Order Number: 590.043150 (Indicating specific hardware/software configuration)

• Type: Digital distribution automation protection relay

• Main protections: overcurrent, ground fault, automatic reclosing, direction protection (optional)

• Automation functions: Automatic reclosing, fault location and isolation

• Communication protocols: IEC 60870-5-101/104, DNP3.0, Modbus

• Installation method: Panel installation or rack installation

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