3P + 3P Dual Power Manual Transfer Switch (MTS) – Lets you manually switch between two three-phase AC power sources (e.g., grid and generator/backup), ensuring continuous supply when one source fails.
Integrated Circuit Breaker (MCB) Protection – Combines transfer switch functionality with overload, short-circuit, under-voltage, and phase-loss protection in one unit for safer operation.
Three-Phase Compatibility (3P + 3P) – Designed for balanced switching of all three phases between two input sources, suitable for industrial, commercial, and large-load three-phase systems.
Wide Voltage & Frequency Support – Compatible with 230 V / 400 V AC and works on both 50 Hz and 60 Hz networks.
Manual Operation – User-controlled changeover without automation, giving direct control over which source is supplying power.
Wide Current Range – Available in various current ratings (e.g., 6 A up to 63 A), allowing selection based on load requirements.
High Breaking Capacity (~6 kA) – Built to safely interrupt fault currents and protect the circuit during overloads and short-circuit events.
DIN-Rail Mountable Design – Easy installation in electrical panels and distribution boards with standard DIN-rail mounting.
₨ 3,799 ₨ 4,099
The TOMZN 3P+3P AC Dual Power Manual Transfer Switch with Integrated MCB is a manual changeover device designed for three‑phase AC dual power systems. It lets you manually switch between two power sources (such as the main utility/grid and a backup generator or reserve supply) to maintain continuous electrical supply when one source fails. The unit supports 230 V/400 V AC at 50/60 Hz and incorporates overload, under‑voltage, short‑circuit, and phase‑loss protection functions for improved safety and reliability. Built for industrial, commercial, and residential applications where power continuity is critical, this switch ensures balanced three‑phase power transfer and secure operation under various load conditions.
| Specification | Details |
|---|---|
| Model | TOB1‑63H 3P+3P MTS AC Dual Power Manual Transfer Switch with MCB |
| Type | Manual Transfer Switch (MTS) with integrated Circuit Breaker (MCB) |
| Pole Configuration | 3P + 3P (three‑phase dual power input) |
| Rated Voltage | 230 V ~ / 240 V ~ to 400 V AC (AC 50 Hz/60 Hz) |
| Frequency | 50 Hz / 60 Hz |
| Rated Current Options | 6 A, 10 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A |
| Breaking Capacity | 6 kA (typical) |
| Protection Functions | Overload protection, under‑voltage protection, short‑circuit protection, phase‑loss protection |
| Operation | Manual switching between two three‑phase AC power sources (grid ↔ backup/generator) |
| Safety Features | Prevents both sources from being connected at the same time (interlocking concept) |
| Mounting | Standard DIN‑Rail installation |
| Applications | Industrial, commercial & residential three‑phase power backup/changeover systems |
Single‑Pole AC Miniature Circuit Breaker (MCB) – Protects a single phase in AC electrical circuits.
Rated Voltage: 230/400 V AC at 50/60 Hz — suitable for standard household and industrial AC systems.
C‑Type Trip Curve – Trips on moderate overcurrents (≈5–10× rated current), ideal for circuits with moderate inrush like lighting and small motors.
Overload & Short‑Circuit Protection – Automatically disconnects the circuit when current exceeds safe limits to prevent wiring or device damage.
Multiple Current Ratings Available: Often offered in 2 A, 4 A, 6 A, 10 A, 16 A, 20 A, 32 A, 63 A to match different circuits.
Compact, DIN‑Rail Mountable Design – Easy to install in standard distribution boards and electrical panels.
1‑Pole Configuration: Single‑pole fuse holder for one DC circuit/string in a PV system.
Wide Fuse Compatibility: Works with 10×38 mm PV fuse links rated from around 3 A up to 30 A (varies by model and application).
Robust Construction: Made from high‑temperature resistant plastic with good insulation for safer DC operation.
DIN‑Rail Mountable: Standard 35 mm DIN rail mounting allows easy installation in PV combiner boxes and DC panels.
Essential PV Protection: Acts as a base for fuse links that protect against overcurrent, overloads, and short‑circuit faults in solar strings.
Adjustable Over‑Voltage Protection — Cuts power when phase voltage exceeds the set safe level to protect equipment from high‑voltage damage.
Adjustable Under‑Voltage Protection — Disconnects supply if phase voltage drops below the set threshold to avoid brown‑out damage.
Over‑Current Protection — Protects circuits from over‑current conditions with adjustable current limits.
Three‑Phase Balance & Asymmetry Protection — Detects phase imbalance (asymmetry) and trips to prevent damage to motors and other loads.
Phase Sequence Protection — Ensures correct phase order and prevents reversal faults that can damage three‑phase equipment.
Adjustable Timing Controls — Active time, reconnect delay, and power‑on delay are adjustable to fine‑tune protection response.
Manual Voltage & Current Calibration — Allows precise calibration of measurement ranges to match specific system requirements.
DIN‑Rail Mountable Design — Standard 35 mm DIN‑rail installation for easy panel mounting.
Wide Use Cases — Suitable for industrial, commercial, and residential three‑phase systems to protect motors, compressors, HVAC units, and other loads.
Adjustable Over-Voltage Protection – Cuts off power if voltage rises above your set safe level (e.g., 230–300 V range).
Adjustable Under-Voltage Protection – Disconnects supply when voltage falls below the safe limit (e.g., 140–210 V range).
Adjustable Over-Current Protection – Protects against excessive current with adjustable current range up to 63 A.
Real-Time Monitoring – Built-in voltage meter, ammeter, and energy (kWh) meter for live electrical data.
Delay & Reconnect Settings – Adjustable delay times before protection kicks in and automatic power reconnection after normal conditions return.
Memory of Fault Values – Saves recorded values for over-voltage, under-voltage, and over-current events even after power is off.
LED Indicators – Flashing LEDs show voltage or current protection status when triggered.
DIN-Rail Mountable – Fits easily into electrical panels using a standard DIN rail.
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