Overview
The ABB RET316*4 (HESG448750M2) is a digital transformer differential protection relay engineered for medium- and high-voltage power systems. It delivers rapid and selective protection for two- or three-winding transformers, including autotransformers and generator step-up units.
This relay incorporates 87T differential, overcurrent, thermal overload, and voltage protection functions to safeguard transformers against internal faults and abnormal operating conditions. Its numerical logic, programmable I/O, and robust fault supervision help ensure grid stability and rapid fault clearance.
Designed for reliability, the RET316*4 is widely used in both utility substations and industrial distribution networks. Its compact module format makes it suitable for new installations and modernization projects with limited panel space.
Technical Data
| Parameter | Specification |
|---|---|
| Product Type | Transformer Differential Protection Relay |
| Model Number | RET316*4 |
| ABB Code | HESG448750M2 |
| Operating Temperature | –10°C to +55°C |
| Dimensions (H × W × D) | 192 mm × 96 mm × 175 mm* |
| Weight | 1.5 kg |
Typical Applications
The RET316*4 is utilized for transformer and generator-transformer protection in:
-
Power transmission & distribution substations
-
Hydroelectric and thermal power plants
-
Petrochemical and heavy industrial networks
-
Renewable energy systems (wind/solar substations)
Engineers rely on it for:
-
Fast internal fault clearing to prevent transformer damage
-
Stable operation during inrush, energization, and external faults
-
Enhanced asset integrity through thermal monitoring and trip supervision
This relay plays a key role in minimizing downtime, maintaining network reliability, and reducing catastrophic transformer failures.
FAQ
Q: What is the primary protection function?
A: High-speed 87T transformer differential protection with restraint for inrush and CT saturation.
Q: Which transformer configurations are supported?
A: Two-winding, three-winding, autotransformer, and GSU applications.
Q: Does it support control and supervision?
A: Yes — breaker control, alarm supervision, and event logging are included.
Q: Is it suitable for retrofit projects?
A: Yes — compact design and flexible mounting facilitate panel upgrades.
Q: Communication protocol?
A: Varies by relay firmware/model; serial protocols are typical in this generation.
| Brze ponude | Primite cijenu i dostupnost BRZO od našeg posvećenog tima za korisničku podršku. |
|---|---|
| Dostava | Dostupna je ubrzana, teretna i međunarodna dostava. |
| Stanje | 100% Novo s originalnom ambalažom |
| Plaćanje | Prihvaćamo American Express, Discover, MasterCard, PayPal i Visa. Naša stranica je osigurana RapidSSL-om. |
| Luka za otpremu | ShangHai, Xiamen |
| Jamstvo | 12 mjeseci |
| Q: Jesu li naše cijene konkurentne? |
| A: Da, surađujemo s više od 50 zemalja širom svijeta. Kao vodeći dobavljač u Kini, nudimo značajne popuste temeljem tržišnih trendova. |
| Q: Koje je jamstveno razdoblje? |
| A: Svi naši novi i originalni proizvodi dolaze sa standardnim jamstvom od jedne godine. |
| Q: Koje metode plaćanja prihvaćamo? |
| A: Zahtijevamo 100% T/T (telegrafski transfer) uplatu prije otpreme. Za artikle s rokom isporuke, potrebno je unaprijed uplatiti 30% depozita, a preostalih 70% prije otpreme. Ako imate predstavnika u Kini, možete preko njega dogovoriti prijenos RMB. |
| Q: Koje metode dostave koristimo? |
| A: Uglavnom koristimo FedEx, DHL, UPS i BRE za dostavu. Ako imate račun kod bilo kojeg od ovih prijevoznika, možete sami obaviti otpremu. Također nudimo besplatnu dostavu za špeditere sa sjedištem u Kini. |
| Q: Koje je naše vrijeme isporuke? |
| A: Dostava obično traje 1-3 dana nakon primitka početne uplate. Za artikle s rokom isporuke, otprema će se izvršiti prema navedenom rasporedu. |
| Q: Kako pakiramo robu? |
| A: Osiguravamo sigurno pakiranje s višestrukim slojevima zaštite. Proizvodi se prvo stavljaju u njihove originalne kutije i zatvaraju naljepnicama. Zatim se dodaje sloj mjehurićaste folije za zaštitu od udaraca tijekom transporta. Na kraju, predmeti se sigurno pakuju u čvrste kutije. |
| Q: Kako nas kupci mogu kontaktirati i zatražiti ponudu? |
| A: Možete nas kontaktirati putem e-pošte, WhatsAppa, WeChata, Skypea ili vaše omiljene komunikacijske platforme. Obratite nam se sa svojim potrebama, a mi ćemo vam pružiti brzu, prilagođenu ponudu. |
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