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RF381800 Lovato RF38 overload relay 13-18 amp dol 7.5kw star/delta at 15kw
MPN: RF381800
Special Price
£49.48
£41.23
Regular Price
£82.46
Why Choose the RF381800?
Lovato RF381800 is a phase failure/single‑phase sensitive thermal overload relay designed for reliable motor protection in three‑phase systems. Covering a 13…18 A operational range, it offers manual or automatic resetting and a 3‑pole configuration. The unit mounts directly onto BF09…BF38 contactors, streamlining panel assembly and maintenance while maintaining IP20 frontal protection for safer handling.
Built for demanding environments, the relay carries Ui 690 V and Uimp 6 kV insulation ratings, Pollution Degree 3, and a frontal IP20 degree. It operates from −25 to 60 °C, stores from −50 to 70 °C, and is rated for altitudes up to 3000 m. Terminal tightening torque is 2 to 2.5 Nm. Conforms to IEC/EN 60947‑1/‑4‑1, UL508 and CSA C22.2 n° 14.
Key Benefits
- Phase failure/single‑phase sensitive protection enhances three‑phase motor reliability.
- Adjustable 13…18 A setting adapts to application load requirements.
- Manual or automatic reset offers flexible restart and maintenance options.
- Direct mounting on BF09…BF38 contactors speeds installation and saves space.
- 3‑pole design suited to three‑phase circuits and motor feeders.
- Robust insulation: Ui 690 V and Uimp 6 kV withstand surges.
- IP20 frontal protection and Pollution Degree 3 for safer handling.
Technical Specification
- Number of poles: 3
- Pollution degree: 3
- IP degree (frontal): IP20
- Rated insulation voltage Ui (IEC/EN): 690 V
- Rated impulse withstand voltage Uimp: 6 kV
- Terminal tightening torque: 2 to 2.5 Nm
- Ith (IEC): 10 A
- Operating temperature: -25 to 60 °C
- Storage temperature: -50 to 70 °C
- Max altitude: 3000 m
- Weight: 160 g
What’s Included
- Lovato RF381800 thermal overload relay
- Installation and operation instructions
- Protective packaging for transit
Applications
- Three‑phase motor protection within 13…18 A operational range
- Direct‑mounted assemblies using BF09…BF38 contactors
- Control panels requiring phase failure/single‑phase sensitive protection
- Industrial environments aligning with Pollution Degree 3 and IP20 frontal areas
Frequently Asked Questions
What current range does the Lovato RF381800 cover?
It has an operational current range of 13...18 A. Set the relay to match your motor’s requirements.
Can I choose between manual and automatic reset?
Yes. The RF381800 supports manual or automatic resetting to suit your application.
How is this relay mounted?
It mounts directly on BF09… BF38… contactors for a compact, streamlined assembly.
What are its key electrical and protection ratings?
Frontal IP20 degree, Ui 690 V and Uimp 6 kV. The device is 3‑pole and phase failure/single‑phase sensitive.
Which standards does it conform to?
It conforms to IEC/EN 60947-1 and IEC/EN 60947-4-1, plus UL508 and CSA C22.2 n° 14.
Safety note: Only qualified personnel should install and adjust this device. Isolate power before work, set the trip within 13...18 A, and operate within the stated ratings and environmental limits.
| Manufacturer Part Number | RF381800 |
|---|---|
| KW Rating | 7.5kW |
| Amp Range | 13A - 18A |
| Manufacturer | Lovato |
| Barcode | 8013975169889 |
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