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KYMTS-125A 4P Manual Transfer Switch
The manual transfer switches 125A 4P provide full isolation of L1/L2/L3/N during changeover.
Ergonomic I–0–II handle, copper contacts, DIN-rail or panel mounting.
IEC 60947-3 compliant; ideal for commercial, industrial, and PV/ESS systems.
Overview
The manual transfer switches (KYMTS-125A 4P) are designed for three-phase + neutral AC systems that require reliable source changeover. The 4-pole configuration provides full isolation of L1/L2/L3/N during I–0–II switching between utility, generator, or PV inverter, ensuring maximum safety and compliance.
To compare full KYMTS series, see the Manual Transfer Switch landing page. In PV and ESS setups, the 4P unit integrates with PV combiner boxes, upstream circuit breakers, and DC fuses. Refer to IEC and CE certification for standards compliance.
Key Features
- 125A, 4P manual changeover with L1/L2/L3/N isolation.
- Manual handle with I / 0 / II positions for safe operation.
- High-conductivity copper contacts with low temperature rise.
- Compact body suitable for DIN-rail / panel installation.
- Ideal for generator transfer, inverter bypass, and commercial distribution boards.
- Meets IEC 60947-3 switch-disconnector standards.
Specifications
| Model | KYMTS-125A 4P |
|---|---|
| Poles | 4P (L1/L2/L3/N) |
| Rated Current (In) | 125A |
| Rated Operational Voltage (Ue) | 400V AC |
| Frequency | 50/60Hz |
| Insulation Voltage (Ui) | 690V |
| Mounting | DIN-rail / Panel |
| Reference Standard | IEC 60947-3 |
Wiring & Dimensions
Applications
- Commercial generator changeover with neutral isolation
- Industrial feeders and MCC boards
- PV/ESS inverter bypass with full pole switching
- Microgrid and backup power systems
FAQ
What are manual transfer switches used for?
Manual transfer switches safely changeover loads between two power sources such as utility and generator or inverter, with full L1/L2/L3/N isolation.
When should I choose a 4P instead of 3P?
A 4P unit is required when neutral switching is needed, ensuring compliance with codes and safe system operation.
Where can I compare KYMTS models?
Visit the Manual Transfer Switch landing page for all 1P/2P/3P/4P options.
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Looking for durable manual transfer switches? Contact us today for datasheets, pricing, and support.
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