DEIF DLQ144-PC-NB

Description

Introduction to the DEIF DLQ144-PC-NB

Product Description

The DEIF DLQ144-PC-NB is a sophisticated control and protection module from DEIF’s robust lineup of marine, power generation, and industrial control solutions. This device is specifically a part of DEIF’s SynchroPower or multi-line controller series, designed to manage synchronizing, load sharing, and protection for multiple generator sets or power sources in a paralleled system. The DEIF DLQ144-PC-NB integrates advanced measurement, protection, and control logic to ensure the safe and efficient operation of gensets in island mode or when connecting to the grid. It typically handles functions such as automatic start/stop, voltage and frequency control, protection (under/over voltage, under/over frequency, reverse power), and precise synchronization. The suffix “PC-NB” indicates specific hardware options, likely relating to the communication interface or input power supply.

Product Parameters

• Product Series: DEIF DLQ / SynchroPower Series

• Model: DLQ144-PC-NB

• Device Type: Generator Control Module / Multi-Function Protection Relay for Paralleling

• Inputs: Accepts voltage and current signals (via external CTs and VTs) for multiple phases, along with binary inputs for status and commands.

• Measurement Functions: Measures and displays voltage, current, frequency, power (kW, kVAR, kVA), power factor, and energy.

• Control Functions: Automatic start/stop sequencing, synchronizer (for paralleling gensets or to the grid), load sharing (isochronous and droop control), and power management.

• Protection Functions: Comprehensive generator and system protection including over/under voltage, over/under frequency, overcurrent, reverse power, and phase sequence.

• Outputs: Relay outputs for controlling circuit breakers (close/trip), engine start/stop, and alarm annunciation.

• Communication: Typically includes serial communication ports (RS-485) for Modbus RTU or other protocols for integration into SCADA systems.

• Display: Features an integrated display (LCD or LED) for local monitoring and parameter setting.

Advantages and Features

The primary advantage of the DEIF DLQ144-PC-NB is its all-in-one, integrated design that consolidates multiple functions (metering, protection, control) into a single, compact device, simplifying system design and reducing wiring. It offers extremely precise and reliable synchronization and load sharing, which is critical for stable parallel operation of generator sets. The module is known for its user-friendly configuration software, which provides clear parameterization and commissioning tools. Its robust construction ensures reliable operation in harsh environments like marine engine rooms or industrial power plants. The DLQ144-PC-NB helps optimize fuel efficiency and extends engine life through its advanced control algorithms.

Application Cases in Industry

This controller is essential in applications where multiple generators operate in parallel. In marine vessels, the DEIF DLQ144-PC-NB manages the ship’s main and auxiliary generator sets to ensure continuous and stable power for propulsion and hotel loads. In land-based power plants (diesel/gas), it controls multiple gensets in island mode for industrial facilities, mines, or remote communities. For emergency standby power systems in hospitals, data centers, and commercial complexes, it controls and synchronizes backup generators. It is also used in renewable energy hybrid systems to manage gensets in combination with solar or wind power.

Comparison with Competing Products

Competing products include multi-function generator controllers from Deep Sea Electronics (DSE 8000/9000 series), Woodward (GCP/ES), and ComAp (InteliGen). The DEIF DLQ144-PC-NB competes through its strong reputation in the marine sector and its focus on precise paralleling control. Compared to simpler generator controllers, it offers a higher degree of integrated functionality for complex multi-genset applications. Its software and user interface are often considered highly intuitive by engineers and technicians. The choice depends on specific application requirements, brand preference, and the level of integration needed with other vessel or plant systems.

Selection Suggestions and Precautions

Selecting the DEIF DLQ144-PC-NB requires a clear definition of the power system architecture: the number of generators to be paralleled, the need for grid connection (island or utility paralleling), and the specific protection functions required. The voltage and current transformer ratios must be correctly specified to match the generator’s output. The required communication protocol (e.g., Modbus) must be confirmed. Consider if any optional I/O expansion modules are needed.

Precautions:

• Installation, configuration, and commissioning must be performed by qualified personnel trained in electrical power systems and generator control.

• High Voltage/Current Hazard: Wiring to voltage and current transformers involves connections to live generator outputs. Proper safety procedures and PPE are mandatory.

• CT (Current Transformer) circuits must never be opened while the generator is running, as this creates a dangerous high voltage.

• Protection settings (trip levels, time delays) must be carefully calculated and set based on the generator and system characteristics to ensure proper coordination and avoid nuisance trips.

• After installation, thorough testing of all control sequences (start, synchronize, load share, stop) and protection trips is essential before placing the system into full operation.

3BSC610066R1 ABB
3BSC610068R1 ABB
5SHY35L4520 ABB
GJR5253100R3260 ABB
GJR5253100R0270 ABB