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Description
RM17TT00Main Range of product Zelio Control Product or component type Modular measurement and control relays Relay type Multifunction control relay Product specific application For 3 phase supply Relay name RM17TT Relay monitored parameters Phase failure detection Phase sequence Time delay Without Switching capacity in VA 1250 VA Measurement range 208 480 V voltage AC Complementary Reset time 1500 ms time delay Maximum switching voltage 250 V AC 250 V DC
Main
| Range of product | Zelio Control |
| Product or component type | Modular measurement and control relays |
| Relay type | Multifunction control relay |
| Product specific application | For 3-phase supply |
| Relay name | RM17TT |
| Relay monitored parameters | Phase failure detection Phase sequence |
| Time delay | Without |
| Switching capacity in VA | 1250 VA |
| Measurement range | 208...480 V voltage AC |
Complementary
| Reset time | 1500 ms time delay |
| Maximum switching voltage | 250 V AC 250 V DC |
| Minimum switching current | 10 mA at 5 V DC |
| Maximum switching current | 5 A AC 5 A DC |
| Supply voltage limits | 183…528 V AC |
| Control circuit voltage limits | - 12 % + 10 % Un |
| Power consumption in VA | 0…22 VA at 400 V AC 50 Hz |
| Control circuit frequency | 50...60 Hz +/- 10 % |
| Output contacts | 1 C/O |
| Nominal output current | 5 A |
| Measurement voltage limits | 183…528 V AC |
| Hysteresis | 2 % |
| Delay at power up | 650 ms |
| Maximum measuring cycle | 150 ms measurement cycle as true rms value |
| Threshold adjustment voltage | -2...-17 % in the range 220 V AC 2...20 % of Un selected +2...+17 % in the range 480 V AC -2...-12 % in the range 208 V AC |
| Voltage range | 208...480 V phase to phase |
| Adjustment of asymmetry threshold | 5...15 % of Un selected |
| Repeat accuracy | 0.5 % for input and measurement circuit 3 % for time delay |
| Measurement error | < 0.05 %/°C with temperature variation < 1 % over the whole range with voltage variation |
| Phase failure sensitivity | 0.7 Un |
| Response time | < 200 ms (in the event of a fault) |
| Marking | CE |
| Overvoltage category | III conforming to IEC 60664-1 |
| Insulation resistance | > 500 MOhm at 500 V DC conforming to IEC 60255-5 > 500 MOhm at 500 V DC conforming to IEC 60664-1 |
| [Ui] rated insulation voltage | 400 V conforming to IEC 60664-1 |
| Supply frequency | 50/60 Hz +/- 10 % |
| Operating position | Any position without |
| Connections - terminals | Screw terminals, 1 x 0.5...1 x 4 mm² (AWG 20...AWG 11) solid without cable end Screw terminals, 2 x 0.5...2 x 2.5 mm² (AWG 20...AWG 14) solid without cable end Screw terminals, 1 x 0.2...1 x 2.5 mm² (AWG 24...AWG 12) flexible with cable end Screw terminals, 2 x 0.2...2 x 1.5 mm² (AWG 24...AWG 16) flexible with cable end |
| Tightening torque | 0.6…1 N.m conforming to IEC 60947-1 |
| Housing material | Self-extinguishing plastic |
| Local signalling | LED (green)power ON: LED (yellow)relay ON: |
| Mounting support | 35 mm symmetrical DIN rail conforming to EN/IEC 60715 |
| Electrical durability | 100000 cycles |
| Mechanical durability | 30000000 cycles |
| Operating rate | <= 360 operations/hour full load |
| Utilisation category | AC-12 conforming to IEC 60947-5-1 AC-13 conforming to IEC 60947-5-1 AC-14 conforming to IEC 60947-5-1 AC-15 conforming to IEC 60947-5-1 DC-12 conforming to IEC 60947-5-1 DC-13 conforming to IEC 60947-5-1 |
| Safety reliability data | MTTFd = 502.2 years B10d = 470000 |
| Width | 17.5 mm |
| Net weight | 0.13 kg |
Environment
| Electromagnetic compatibility | Emission standard for industrial environments conforming to EN/IEC 61000-6-4 Emission standard for residential, commercial and light-industrial environments conforming to EN/IEC 61000-6-3 Immunity for industrial environments conforming to EN/IEC 61000-6-2 |
| Standards | EN/IEC 60255-1 |
| Product certifications | UL GL C-Tick GOST CSA |
| Directives | 73/23/EEC - low voltage directive 89/336/EEC - electromagnetic compatibility |
| Ambient air temperature for storage | -40…70 °C |
| Ambient air temperature for operation | -20…50 °C |
| Relative humidity | 95 % at 55 °C conforming to IEC 60068-2-30 |
| Vibration resistance | 0.35 mm (f= 5…57.6 Hz) conforming to IEC 60068-2-6 1 gn (f= 57.6…150 Hz) conforming to IEC 60255-21-1 |
| Shock resistance | 15 gn for 11 ms conforming to IEC 60255-21-1 |
| IP degree of protection | IP20 (terminals) conforming to IEC 60529 IP30 (casing) conforming to IEC 60529 |
| Pollution degree | 3 conforming to IEC 60664-1 |
| Dielectric test voltage | 2 kV, 1 min AC 50 Hz conforming to IEC 60255-5 2 kV, 1 min AC 50 Hz conforming to IEC 60664-1 |
| Non-dissipating shock wave | 4 kV conforming to IEC 60255-5 4 kV conforming to IEC 60664-1 4 kV conforming to IEC 61000-4-5 |
Offer Sustainability
| Sustainable offer status | Green Premium product |
| REACh Regulation | REACh Declaration |
| EU RoHS Directive | Pro-active compliance (Product out of EU RoHS legal scope) EU RoHS Declaration |
| Mercury free | Yes |
| RoHS exemption information | Yes |
| China RoHS Regulation | China RoHS declaration |
| Environmental Disclosure | Product Environmental Profile |
| Circularity Profile | End of Life Information |
| WEEE | The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins |
Contractual warranty
| Warranty | 18 months |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
A Must if you have Fiber internet!!!
Size: 10FT
I recently got fiber internet installed and decided to upgrade my Ethernet cable from Cat 7 to this UGREEN Cat 8 cable—mostly just because I wanted to make sure my network setup was fully up to date. I honestly wasn't expecting much of a difference, but I was surprised to see over a 20% increase in speed after swapping out the cable.
The cable itself is extremely high quality. The braided exterior feels durable and premium, and the connectors are solid and well-made. Everything about it gives the impression of a quality product designed to last.
Whether the speed improvement was due to my previous cable or not, I'm very happy with the results. For anyone upgrading their network, especially with fiber internet, this was a worthwhile upgrade and well worth the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
★★★★★ 5
UGREEN Cat 8 6FT Braided – Finally a short cable that actually hits 40 Gbps in real life
Size: 6FT
⭐⭐⭐⭐⭐
UGREEN Cat 8 6FT Braided – Finally a short cable that actually hits 40 Gbps in real life
I have a 10 Gbit NAS (Synology DS1823xs+) sitting right behind my gaming PC, and every “Cat8” cable I tried before this one was either stiff boat-anchor thick or straight-up lied about speed. This UGREEN 6 ft braided version is the first one that actually delivers.
Real-world tested speeds
iperf3 PC ↔ NAS: sustained 39.4 Gbps bidirectional (that’s ~4.9 GB/s)
Large 4K/8K file transfers: 4.7–4.8 GB/s steady, no drops
Zero packet errors after 48 hours of torture testing
Build quality & practicality
Flat braided jacket is super flexible, looks premium, and doesn’t turn into a tangled mess like round Cat8 cables
Gold-plated contacts, double shielding, and it passes a Fluke DSX-8000 Cat8 Channel test (yes, I’m that guy)
Perfect 6 ft length, no excess coil behind the desk causing signal reflections
Snagless boot actually works, no more broken clips
Why I love it for desktop use
Runs cool even at full 40 Gbps load (barely warm)
Way less stiff than the usual shielded Cat8 firehoses, easy to route under a desk or through a cable sleeve
Latency is stupid low: 0.22 ms average to my NAS vs 0.45 ms on my old Cat6a round cable
Only “con” (and it’s tiny): it’s flat, so if you’re one of those people who religiously wants perfectly round cables for aesthetics, you might not like it. Everyone else on planet Earth will think it looks cleaner anyway.
For $14, this is the best short-hop 40 Gbps cable on Amazon, bar none. Already replaced every 1–10 ft run in my office with these. If you have 10G+ gear sitting close together and you’re still using Cat6 or stiff Cat8, do yourself a favor and grab a couple. You’ll instantly feel the difference.
10/10 – UGREEN absolutely crushed it with this one.
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Reviewed in the United States on December 12, 2025
★★★★★ 5
Still the best ethernet cable out there right now
Size: 6FT
I ordered several of these cables a couple years ago and they are still the best cables I have ever purchased. The Cat8 speed rating is great. These are very well built with the outer covering and the quality connectors and covers over them. Fast data transfer wtih Cat8. I am ordering more tonight to replace some other cables as these just look, feel and work premium.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
★★★★★ 4
Great Cable!
Size: 10FT
Cable is great. Ive always been happy with UGREEN products. Only gave it a four star because I ordered a new cable and received a used one. Works just fine and its not an issue with the product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 5
Great Cable
Size: 10FT
I’m really impressed with this cable. The braided design makes it feel extremely durable compared to standard rubber cables, and it gives me confidence that it’ll hold up well over time without fraying or breaking. The 10-foot length is perfect—long enough to reach where I need without creating extra clutter.
Performance-wise, it delivers exactly what it promises. The connection is fast and stable, making it great for gaming, streaming, or anything that needs a reliable high-speed connection. Overall, it’s a high-quality cable that combines durability, performance, and a convenient length. Definitely a great buy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
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