LMGL2-250 4P 250A Panel-Mount Load Break Disconnector

Product Overview

The LMGL2 series load break switch-disconnector is a dedicated switching and isolation device for low-voltage power distribution systems. This 250A 4-pole model features a panel-mounted structure with an extended external operating handle, allowing operators to switch the circuit on and off directly from outside the switchgear cabinet without opening the door.

Rated for AC-23 utilization category, it is capable of making and breaking rated resistive-inductive loads at nominal voltage, and also provides a clear, safe isolation break point that complies with electrical safety standards for equipment maintenance. It is widely installed in industrial switchgear, low-voltage distribution panels, motor control centers (MCC) and power distribution boxes as main incoming switches or feeder isolation devices.

Key Product Features

✅ Front Panel External Operating Handle Extended front-mounted operating handle adapted to standard switchgear door thickness. Enables direct ON/OFF operation from outside the cabinet without opening the door, improving operation efficiency and maintenance safety. The handle has clear ON/OFF position marking and positioning structure to prevent misoperation.

✅ 4-Pole Full Circuit Isolation Switches all three phase conductors and the neutral line simultaneously to achieve complete galvanic isolation. Suitable for 3-phase 4-wire systems such as TN-S, meeting safety requirements for maintenance power-off and fault isolation.

✅ AC-23 Load Breaking Capability Complies with AC-23 utilization category, supports making and breaking rated resistive-inductive loads at nominal voltage. Serves both as an isolating device and for infrequent load switching operations.

✅ High Insulation & Safety Performance 690V rated insulation voltage, IP20 protection degree for the switch body. Reliable contact gap and insulated housing design ensure the electrical clearance and creepage distance in open state meet international safety standards.

✅ Standard Panel Mounting Dimensions Industry-standard mounting cutout dimensions and terminal spacing, compatible with mainstream low-voltage switchgear and distribution cabinets. Can directly replace same-specification disconnectors on the market without cabinet modification.

✅ IEC International Standard Compliance Designed and manufactured in strict accordance with IEC 60947-3 standard for low-voltage switchgear and controlgear switch-disconnectors. Passed full type test verification, suitable for global industrial distribution projects.

Technical Specifications

Application Scenarios

• Main power isolation for low-voltage switchgear and distribution panels
• Incoming and feeder isolation for motor control centers (MCC)
• Main switch for industrial plant power distribution boxes
• Maintenance isolation for commercial building and infrastructure distribution systems
• Infrequent switching of pumps, fans and other power equipment
• AC/DC side isolation for photovoltaic and energy storage systems

Our Advantages

1. Full specification stock availability Full current range from 63A to 630A with 3P/4P options in sufficient stock. Support mixed batch orders for panel builders and switchgear manufacturers, with fast bulk shipment available.
2. Reliable operation and isolation performance Mature contact system and operating mechanism with clear position locking, reliable isolation break point and uniform operating torque. Smooth operation after long-term use, ensuring on-site operation safety.
3. Strict factory quality inspection Each unit undergoes continuity test, dielectric withstand test and mechanical operation test before delivery to ensure stable out-of-box performance and ready-to-use on-site installation.
4. Standard size with high compatibility Universal mounting dimensions and terminal layout, can directly replace mainstream brands of same-specification load break disconnectors on the market without cabinet cutout modification.
5. Complete project technical support Provide dimension drawings, installation manuals, selection guides and test certificates to support project design, tender bidding and on-site commissioning guidance.

Custom Solution

We provide project-oriented custom solutions for LMGL2 series load break disconnectors:

• OEM Brand Customization: Custom silk-screen logo, model marking and parameter label on product body and handle for branded resale.
• Specification Customization: Custom current ratings, pole configurations, handle length and operation direction to match different cabinet depths and installation scenarios.
• Export-grade Custom Packing: Neutral carton, customer-branded packaging and seaworthy reinforced packing for long-distance sea transportation.
• Large-project Priority Delivery: Priority production and delivery schedule for large engineering project orders to guarantee project timeline.

Share your required current rating, pole configuration and application scenario, our engineers will recommend the most suitable disconnector solution within 24 working hours.

FAQ

Q1: What is the difference between load break disconnector and standard isolating switch?

A: A standard isolating switch is mainly for no-load isolation, operated only in de-energized state to provide a maintenance break point. A load break disconnector with AC-23 rating can directly make and break circuits at rated load, combining both isolation function and load switching capability.

Q2: Can this switch be operated under load?

A: Yes. This product complies with AC-23 utilization category, supporting infrequent making and breaking of resistive-inductive loads at rated voltage and current, while also meeting the safety requirements of an isolating device.

Q3: What is the purpose of the external operating handle?

A: The external panel handle allows operators to switch the disconnector on and off directly from outside the switchgear door, without opening the cabinet. It improves operation efficiency and avoids direct contact with internal live parts, ensuring operational safety.

Q4: What standard does this disconnector comply with?

A: It is designed and tested in strict accordance with IEC 60947-3 international standard for low-voltage switch-disconnectors, and meets relevant low-voltage switchgear safety specifications.

Q5: Do you support OEM private label service?

A: Yes, we provide custom logo and parameter label printing on the product. A certain MOQ applies for OEM service.

Q6: What pole and current options are available for this series?

A: The series offers 3P and 4P pole configurations, with current ratings covering 63A to 630A, which can be selected according to actual distribution requirements.

Q7: What is the installation method?

A: It adopts fixed panel mounting. The switch body is fixed inside the switchgear cabinet, and the operating handle extends through the door, adapted to standard thickness distribution cabinet doors.

Package Content

1 × LMGL2-250 Panel-Mount Load Break Disconnector 1 × Operating Handle Assembly 1 × Mounting Accessory Kit