Description Dual Power Manual Changeover Switch—63A, 400V AC TOMZN TO219G 63A 400V AC Manual Transfer Switch (MTS) – Best Price in Bangladesh In a country like Bangladesh where unexpected power outages, voltage fluctuations, and load shedding are still common realities, ensuring a stable and uninterrupted power supply is not just a convenience—it’s a necessity. Whether it’s for residential comfort, business continuity, or industrial productivity, having a reliable backup power management system is crucial. The TOMZN TO219G 63A 400V AC Dual Power Manual Changeover Switch is designed to meet exactly that need. Built with durability, safety, and efficiency in mind, this manual transfer switch (MTS) provides a seamless solution for switching between two power sources—typically the main grid and a generator. Technical Specifications Model: TOMZN TO219G Type: Dual Power Manual Transfer Switch Rated Current: 63 Amp Voltage: 400V AC Phase: Phase Neutral (2 Pole) Frequency: 50/60Hz Insulation Voltage: 690V Short Circuit Capacity: 10kA Mechanical Life: 8000 cycles Electrical Life: 1500 cycles Mounting: DIN Rail / Screw Material: Flame-retardant PC Copper contacts Protection Class: IP20 Key Features of TOMZN TO219G MTS High Current Rating: With a 63 Ampere capacity, it can safely manage significant electrical loads, suitable for various residential, commercial, and light industrial applications in Bangladesh. 2-Pole Design: Features a 2-pole configuration (phase neutral), making it ideal for 1-phase 220-400V AC systems common in many Bangladeshi installations, ensuring complete isolation of all lines. Dual Power Changeover: Facilitates manual switching between two separate power sources, providing flexibility and control during power transitions. Robust Construction: Manufactured with high-quality, flame-retardant PC plastic material, ensuring enhanced safety and durability even in challenging environments. Mechanical Interlock: Incorporates a mechanical interlock mechanism to prevent simultaneous connection of both power sources, eliminating the risk of short circuits and ensuring safe operation. Visible Contact Status: Clear indication of the switch position (Source 1 or Source 2) allows for easy monitoring and verification of the active power source. Easy Installation: Designed for convenient 35mm DIN rail mounting or screw fixing, allowing for flexible installation in most standard distribution boards and enclosures. High Breaking Capacity: Engineered to withstand high short-circuit currents, offering superior protection to your electrical system. Long Mechanical and Electrical Life: Built for longevity with a mechanical life of 8000 cycles and an electrical life of 1500 cycles, ensuring reliable performance over many years. Compact Design: Space-saving dimensions allow for efficient use of panel space, a crucial advantage in crowded electrical cabinets. What is a Dual Power Manual Changeover Switch? A manual changeover switch (also known as a manual transfer switch or MTS) is an electrical device that allows users to safely switch power supply from one source to another. Example: Source 1 → National Grid Source 2 → Generator / Backup Power Instead of directly connecting both sources (which is extremely dangerous), the switch ensures: Only one source is active at a time No backflow or short circuit occurs Safe power transition is maintained The TOMZN TO219G is specifically engineered for single-phase systems, making it perfect for: Homes with heavy load Offices Shops & commercial buildings Light industrial setups Installation and Usage Guide Installing the TOMZN TO219G Manual Transfer Switch should always be performed by a qualified and certified electrician to ensure safety and compliance with local electrical codes in Bangladesh. Here’s a general overview: Mounting: Securely mount the switch inside a suitable electrical enclosure or distribution board using its 35mm DIN rail clip or screw mounting holes. Wiring: Connect the primary power source (e.g., utility grid) to one input terminal set and the secondary power source (e.g., generator) to the other input terminal set. Ensure the load wires are connected to the output terminals. Always follow the provided wiring diagram carefully. Grounding: Ensure proper grounding for both the switch and the entire electrical system. Testing: Once installed, conduct thorough testing to verify correct operation and safety before putting the system into full service. Operation: To switch power sources, simply toggle the robust handle to the desired position (Source 1 or Source 2). The mechanical interlock prevents both sources from being active simultaneously. Always ensure all critical loads are off before switching to minimize transient spikes.
