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L&T (d sine - DN3-400D) 400 AMP MCCB

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MOQ : 100 Pieces

L&T (d sine - DN3-400D) 400 AMP MCCB Specification

Rated Short Circuit Making Current
105 kA

Breaking Capacity
50 kA at 415V AC

Rated Short Circuit Breaking Current
50 kA

Phase
Three Phase

Mechanical Life
20,000 operations

Product Type
Moulded Case Circuit Breaker (MCCB)

Installation Options
Panel Mounting

Function
Overload and Short Circuit Protection

Poles Number
3 Pole

Rated Voltage
415V AC

Rated Current
400 Amp

Rated Frequency
50/60 Hz

Curves
Type D

Temperature Protection
Thermal-Magnetic Release

Weight
Approx 5.1 kg

Color
Grey & Black

Operating Voltage Range
AC 220-690V

Auxiliary Contact Provision
Optional

Mounting Orientation
Vertical / Horizontal

Protection Class
IP20

Trip Indication
Available

Dimensions (W x H x D)
140 x 260 x 110 mm

Rated Impulse Withstand Voltage
8 kV

Rated Service Short Circuit Breaking Capacity (Ics)
50 kA

Connection Type
Fixed

Frequency Tolerance
±5% of rated frequency

Operation Mode
Manual

Rated Insulation Voltage
690V

Adjustment Range
0.7 to 1 x In (Thermal), 5 to 10 x In (Magnetic)

Ambient Temperature
-5°C to +55°C

Utilization Category
A

L&T (d sine - DN3-400D) 400 AMP MCCB Trade Information

Minimum Order Quantity
100 Pieces

Supply Ability
100 Pieces Per Day

Delivery Time
2 Days

Sample Available
Yes

Main Domestic Market
All India

About L&T (d sine - DN3-400D) 400 AMP MCCB

MCCB stands forA Molded Case Circuit Breaker. It is another type of electrical protection device which is used when load current exceeds the limit of a miniature circuit breaker. The MCCB provides protection against overload, short circuit faults and is also used for switching the circuits.

Reliable Overload and Short Circuit Protection

The DN3-400D MCCB ensures safety by offering advanced thermal-magnetic release technology, which actively protects electrical circuits from overloads and short circuits. Its 50 kA breaking capacity at 415V AC supports use in high-demand installations, reducing downtime and enhancing operational security for your equipment and workforce.

Versatile and Easy Installation

Engineered for panel mounting, this MCCB accommodates both vertical and horizontal orientations, facilitating seamless integration into new or existing electrical systems. Its compact dimensions and flexible auxiliary contact provision make it adaptable to various industrial setups, ensuring both efficiency and space optimization.

Durable Construction and Performance

With an IP20 protection class and an operating ambient temperature range from -5C to +55C, the DN3-400D is built to withstand different environmental conditions. Its mechanical life of up to 20,000 operations assures long-term, trouble-free usage-delivering reliability and minimal maintenance to users.

FAQ's of L&T (d sine - DN3-400D) 400 AMP MCCB:

Q: How does the L&T DN3-400D MCCB provide protection to electrical systems?

A: The DN3-400D MCCB uses a thermal-magnetic release mechanism to interrupt electrical flow during overloads or short circuits. Its adjustable thermal (0.7-1 x In) and magnetic (5-10 x In) trip ranges ensure tailored protection, reducing the risk of circuit damage.

Q: What is the recommended installation process for this MCCB?

A: The MCCB is designed for fixed panel mounting and supports vertical or horizontal orientation. Proper panel integration ensures stability and optimal performance. Ensure all electrical connections comply with manufacturer guidelines and relevant safety standards during installation.

Q: When should the trip indication feature be used?

A: The trip indication becomes active immediately after the MCCB interrupts the circuit due to an overload or a short circuit event. This visual feature allows rapid identification and facilitates timely troubleshooting or reset processes.

Q: Where can this MCCB be applied for maximum benefit?

A: The DN3-400D is ideal for use in three-phase industrial panels, distribution boards, and other heavy-duty electrical infrastructure requiring high breaking capacity, reliability, and frequent operational cycles.

Q: What are the advantages of having auxiliary contact provisions?

A: Optional auxiliary contacts allow remote monitoring and integration with automation systems. They help provide feedback to control circuits or display systems, enhancing operational oversight and reducing the need for manual inspection.

Q: How does the MCCB maintain reliable operation across various temperatures?

A: The DN3-400D operates efficiently in environments ranging from -5C to +55C, making it suitable for a wide variety of industrial settings without compromise in protective performance.

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