DZ6 400Y 800V MCCB 3P

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Wide range of overload setting starting from 0.25In

Neutral overload protection

Short circuit setting with delay or instantaneous option

Inbuilt Earth fault Protection

Adjustable instantaneous Setting

Thermal Memory with option of Defeat

Provision for release testing

Separate LEDs each for Overload, Short Circuit, Instantaneous and Earth fault Indication

Additional information*

DZ6 400Y 800V MCCB 3P Moulded Case Circuit Breakers

Overview

The DZ6 400Y 800V MCCB 3P is a robust and versatile Moulded Case Circuit Breaker (MCCB) developed for specialized applications requiring reliable switching and isolation. Unlike traditional MCCBs, these units are characterized by the absence of protection trip units, making them ideal for use as isolators in various settings. They are engineered to meet the high standards of performance and safety demanded by contemporary electrical systems.

Key Features

1. Wide Range of Overload Setting

The DZ6 MCCBs offer a comprehensive range of overload settings starting from 0.25In. This flexibility ensures that the device can be tailored to specific circuit requirements, enhancing its adaptability and utility in different applications.

2. Neutral Overload Protection

This MCCB includes neutral overload protection, safeguarding the circuit against potential damage due to overloads in the neutral conductor, thus maintaining system stability and reliability.

3. Short Circuit Setting

With options for either a delay or instantaneous response, these MCCBs provide flexible short circuit protection. This feature ensures quick and appropriate action in case of short circuit events, preventing potential damage to the electrical system.

4. Inbuilt Earth Fault Protection

To offer enhanced protection, the DZ6 series incorporates inbuilt earth fault protection. This critical feature helps in detecting and isolating earth faults promptly, preventing potential hazards and ensuring the safety of personnel and equipment.

5. Adjustable Instantaneous Setting

The MCCBs come with an adjustable instantaneous setting, allowing for precise calibration according to the specific needs of the application. This adjustability ensures that the circuit breaker can respond appropriately to sudden current surges.

6. Thermal Memory with Option of Defeat

Incorporating thermal memory, these MCCBs remember the thermal state of the circuit to ensure accurate response to thermal overloads. An option to defeat this feature is also available for specific applications that require it.

7. Provision for Release Testing

The provision for release testing allows for periodic verification of the MCCB's operational readiness, ensuring that the breaker will function correctly when needed.

8. LED Indicators

Separate LEDs are provided for indicating overload, short circuit, instantaneous response, and earth fault conditions. This feature facilitates easy monitoring and troubleshooting, ensuring quick and accurate identification of issues.

Applications

The DZ6 400Y 800V MCCB 3P is designed to cater to a variety of isolation and switching needs:

• Local Isolation: Ideal for isolating specific sections like motor loads close to the motor.
• Sub-Distribution Systems: Useful for incoming isolation in sub-distribution boards.
• Bus Coupler Isolation: Effective as an isolator for bus coupling applications.
• Automatic Switching Applications: Suitable for use as an automatic switch in various applications.
• Motor Switching: Can be employed in switching operations of motors with Variable Frequency Drives (VFDs) or soft starters.

Technical Specifications

| Parameter | Details | |-----------------------------------|----------------------------------| | Model | DZ6 400Y 800V MCCB 3P | | Rated Current Range | Starting from 0.25In | | Voltage Rating | 800V | | Number of Poles | 3P | | Overload Protection | Neutral Overload Protection | | Short Circuit Protection | Delay/Instantaneous options | | Earth Fault Protection | Yes | | Adjustable Instantaneous Setting | Yes | | Thermal Memory | Yes, with defeat option | | LEDs for Indication | Overload, Short Circuit, Instantaneous, Earth fault | | Testing Provision | Yes |

Benefits

• Enhanced Safety: With features like inbuilt earth fault protection and neutral overload protection, these MCCBs offer superior safety for both equipment and personnel.
• Flexibility: Adjustable settings for overload and instantaneous response provide the flexibility to adapt to specific circuit requirements.
• Reliability: Robust construction and reliable performance make these MCCBs a dependable choice for critical applications.
• User-Friendly: LED indicators and provision for release testing make monitoring and maintenance straightforward and efficient.

Use Cases

1. Local Isolation

In applications where local isolation is essential, such as isolating motor loads close to the motor, the DZ6 MCCB excels. Its precise settings and protective features ensure safe and reliable isolation.

2. Sub-Distribution Boards

For incoming isolation in sub-distribution boards, these MCCBs offer the necessary protection and versatility. The wide range of overload settings and earth fault protection make them a practical choice for managing sub-distribution systems.

3. Bus Coupler Isolation

As an isolator for bus coupling applications, these MCCBs provide reliable