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| Current Range (A) | Phase-failure Protection Type | Standard Type |
| 220-300 | UKK-630 330 | UKH-630/3 330 |
| 300-500 | UKK-630 500 | UKH-630/3 500 |
| 380-630 | UKK-630 630 | UKH-630/3 630 |
UKH-630 Thermal Overload Relay 220-630A Contact Rating 3P 1NO + 1NC
UKH Thermal Overload Relay is designed for circuits up to 660V, 50/60Hz, with a maximum rated operational current of 800A at 380V under the AC-3 duty category.
It is used for the remote switching of circuits and, when combined with a suitable AC contactor or electronic protector, forms a reliable motor starter.
This setup provides effective protection against potential overloads and is well-suited for the frequent starting and control of AC motors. This product is manufactured in compliance with the GB/T 14048.4 standard.
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Key Features
- Direct Mounting with UK-9, 12, 18, and 22 series contactors for easy installation.
- Flexible Installation Options can be mounted on a standard DIN rail or via screws using the optional mounting support (AZ-22H).
- Compact Design with a slim width of only 44mm, saving valuable control panel space.
- 1NO + 1NC Tripping Contact provides reliable signalling for circuit status.
- Precise Tripping Characteristics with Class 10A tripping for the UKH-22 standard type and Class 20A for the UKK-22/L phase-failure protection type.
- Two Versions Available: the standard UKH model and the UKK model with built-in phase-failure protection.
- Wide Operating Temperature Range from -5°C to 40°C for reliable performance in various environments.
- Selectable Reset Mode allows configuration for either manual or automatic reset after tripping.
- Trip-Free Mechanism ensures the contacts remain open during an overload condition, even if the reset button is held, for maximum safety.
- Bimetal Element provides robust and reliable overload protection through a time-proven thermal operating principle.
Application
- Protects industrial motors (e.g., pumps, compressors, conveyors) from overload damage, ensuring continuous operation.
- Safeguards motors in machinery like stamping presses and injection molding machines, reducing downtime and maintenance costs.
- Ensures safe and reliable elevator operation by protecting drive motors from overload-related failures.
- Safeguards motors in generators and pumps at power plants, enhancing operational efficiency and reliability.
- Prevents overload-related failures in substations and distribution networks, ensuring grid stability and safety.
Specifications & Drawings
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UKH-630 Thermal Overload Relay 220-630A Contact Rating 3P 1NO + 1NC
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