SIEMENS 7SA86 Numerical Distance Protection Relay

Jun.2026 12

SIEMENS 7SA86 Numerical Distance Protection Relay - P1B305211

Introduction

The SIEMENS 7SA86 Distance Protection Relay, model P1B305211, is a sophisticated numerical protection device engineered to deliver secure, selective, and high-speed protection for high-voltage transmission lines, cables, and critical power feeders in both utility and industrial electrical networks.

Details

‌1. Product Name‌

SIEMENS 7SA86 Numerical Distance Protection Relay - P1B305211

‌2. Product Introduction‌

‌3. Product Description‌

The SIEMENS 7SA86 (Model P1B305211) is a key component within the established SIPROTEC 5 series, utilizing advanced numerical technology to provide highly accurate multi-zone distance protection. Its primary function is the rapid detection, precise location, and reliable isolation of faults such as short circuits on overhead lines and underground cables. This swift and selective fault clearance is critical for maintaining grid stability, minimizing the spread and impact of outages, and protecting valuable electrical infrastructure from damage.

The relay features an intuitive user interface with a high-resolution graphical display for convenient local monitoring and control. All configuration and management tasks are streamlined through the comprehensive DIGSI 5 engineering software, supporting the implementation of complex protection schemes including distance protection with multiple zones, directional overcurrent protection, auto-reclosing, and detailed disturbance recording. A key advantage is its full support for modern digital communication standards, particularly IEC 61850, enabling seamless integration into digital substation automation (SA) and SCADA systems for efficient remote supervision and data exchange. Built with robust, industrial-grade components, the P1B305211 is designed for dependable, long-term operation in the harsh conditions typical of electrical substations, which are characterized by wide temperature fluctuations and significant electromagnetic interference.

In industrial power distribution systems, this relay serves as a vital upstream protective element. By quickly and selectively isolating faults on main incoming feeders or key distribution circuits, it prevents damaging fault currents and voltage sags from propagating downstream. This is essential for shielding sensitive and high-value production assets from network disturbances. It ensures a stable and high-quality power supply for critical loads throughout a plant, including heavy-duty rotating machinery. This upstream protection strategy is crucial for preventing costly production downtime and equipment stress by mitigating voltage disturbances that could affect sophisticated drive systems. For facilities utilizing components like ‌SIEMENS MOTOR‌ products, such a reliable upstream protection relay contributes to the overall system reliability, safeguarding motors and drives from the effects of upstream electrical faults. It is designed to coordinate effectively with other protective devices, such as motor protection relays, as part of a comprehensive, plant-wide defense strategy.

‌4. Product Model‌

P1B305211	P1G607605	P1L18249
P1B305228	P1G607797	P1L182605
P1B30542	P1G607810	P1L182641
P1B305556	P1G607889	P1L182650
P1B305747	P1G608190	P1L182669
P1B30588	P1G608206	P1L182702
P1B30597	P1G608220	P1L182827
P1B305976	P1G608237	P1L182906
P1B306256	P1G608411	P1L183020
P1B306492	P1G608428	P1L18319
P1B306669	P1G608503	P1L183215
P1B306706	P1G608510	P1L183321
P1B306744	P1G608534	P1L183677
P1B306874	P1G608749	P1L183686
P1B307017	P1G608763	P1L18373
P1B307192	P1G608794	P1L18382
P1B307284	P1G609036	P1L183835
P1B30755	P1G609043	P1L183905
P1B307635	P1G609098	P1L183914
P1B30782	P1G609135	P1L183941
P1B307956	P1G609180	P1L184047
P1B307963	P1G609234	P1L184065
P1B308120	P1G609289	P1L184135
P1B308137	P1G609319	P1L184162
P1B308168	P1G609418	P1L184205
P1B30825	P1G609432	P1L184296
P1B308403	P1G609548	P1L184302
P1B30852	P1G609586	P1L184409
P1B308588	P1G609593	P1L184737
P1B30861	P1G609623	P1L184773
P1B308830	P1G609807	P1L184807
P1B308892	P1G609821	P1L184825
P1B30904	P1G609852	P1L184843
P1B309103	P1G610001	P1L184852
P1B30913	P1G610056	P1L184913
P1B309172	P1G610063	P1L1850
P1B30922	P1G610070	P1L18513
P1B309783	P1G610094	P1L185259
P1B309790	P1G610117	P1L185338
P1B309813	P1G610131	P1L185356
P1B309851	P1G610155	P1L185365
P1B309936	P1G610162	P1L185392
P1B310451	P1G610254	P1L185408
P1B310499	P1G610261	P1L185569
P1B310581	P1G610278	P1L185587
P1B31064	P1G610391	P1L18559
P1B310680	P1G610599	P1L185602
P1B310734	P1G610636	P1L185620
P1B310758	P1G610643	P1L185806
P1B310833	P1G610650	P1L185824
P1B310925	P1G610742	P1L185833
P1B311007	P1G610780	P1L185842
P1B311014	P1G610810	P1L185976
P1B311151	P1G610865	P1L185985
P1B311335	P1G611053	P1L186133
P1B311373	P1G611077	P1L186142
P1B311502	P1G611121	P1L186151
P1B311731	P1G611138	P1L186179
P1B312004	P1G611206	P1L186230
P1B312011	P1G611237	P1L186249
P1B312066	P1G611251	P1L186258
P1B312196	P1G611282	P1L186328
P1B312349	P1G611312	P1L186373
P1B312356	P1G611343	P1L186443
P1B312400	P1G611572	P1L186540
P1B312417	P1G611589	P1L186559
P1B312462	P1G611602	P1L186726
P1B312622	P1G611626	P1L186771
P1B312691	P1G611640	P1L186805
P1B312868	P1G611657	P1L186966
P1B312936	P1G611664	P1L187099
P1B312998	P1G611718	P1L187114
P1B313001	P1G611732	P1L187211
P1B313285	P1G611749	P1L187257
P1B313476	P1G611756	P1L187266
P1B313568	P1G611770	P1L187433
P1B313582	P1G611831	P1L187521
P1B31392	P1G611893	P1L187594
P1B31462	P1G611916	P1L187770
P1B315197	P1G611923	P1L18780
P1B31620	P1G611930	P1L187965
P1B31648	P1G611947	P1L188070
P1B31666	P1G611954	P1L188177
P1B31693	P1G612005	P1L188201
P1B31709	P1G612029	P1L188247
P1B31745	P1G612036	P1L188353
P1B31754	P1G612043	P1L188405
P1B31763	P1G612050	P1L18841
P1B32018	P1G612067	P1L188423
P1B320542	P1G612074	P1L188487
P1B320658	P1G612142	P1L18850
P1B320672	P1G612203	P1L188520
P1B320757	P1G612234	P1L188593
P1B320962	P1G612258	P1L188609
P1B321044	P1G612333	P1L188645
P1B321129	P1G612814	P1L188654
P1B321181	P1G612876	P1L188672
P1B321198	P1G612890	P1L188724
P1B321235	P1G612982	P1L188812
P1B32160	P1G613002	P1L188964
P1B321617	P1G613064	P1L189015
P1B321808	P1G613088	P1L189228
P1B321815	P1G613224	P1L189459
P1B32197	P1G613361	P1L189608
P1B322072	P1G613378	P1L189848
P1B322089	P1G613385	P1L189884
P1B322324	P1G613422	P1L189945
P1B322348	P1G613606	P1L190057
P1B322423	P1G613712	P1L190109
P1B32249	P1G613828	P1L190163
P1B322553	P1G613897	P1L190190
P1B322782	P1G613989	P1L19026
P1B322874	P1G614153	P1L190419
P1B32319	P1G614238	P1L19053
P1B323291	P1G614528	P1L190604
P1B323321	P1G614573	P1L19196
P1B323338	P1G614597	P1L192091
P1B323352	P1G614672	P1L192107
P1B323451	P1G614696	P1L192116
P1B323574	P1G614702	P1L192189
P1B323703	P1G614825	P1L192222
P1B323789	P1G615136	P1L192231
P1B323901	P1G615327	P1L192301
P1B323918	P1G615358	P1L192417
P1B324113	P1G615464	P1L192541
P1B324151	P1G615563	P1L192684
P1B324175	P1G615709	P1L192790
P1B324281	P1G615853	P1L192949
P1B324328	P1G615860	P1L192994
P1B324441	P1G615969	P1L193124
P1B324595	P1G616003	P1L193188
P1B324601	P1G616478	P1L193267
P1B324687	P1G616652	P1L193276
P1B324717	P1G616690	P1L193355
P1B324809	P1G616966	P1L193373
P1B324816	P1G617468	P1L193391
P1B324861	P1G618069	P1L193452
P1B324892	P1G618359	P1L193559
P1B325042	P1G618410	P1L193568
P1B325196	P1G618533	P1L193647
P1B32531	P1G618540	P1L193665
P1B325325	P1G618564	P1L193717
P1B325332	P1G618625	P1L19372
P1B325400	P1G618649	P1L193735
P1B325417	P1G618656	P1L193799
P1B325431	P1G618694	P1L193878
P1B325493	P1G618700	P1L1939
P1B325714	P1G618717	P1L193920
P1B32577	P1G618748	P1L193975
P1B325813	P1G618755	P1L194284
P1B325820	P1G618762	P1L194433
P1B326049	P1G618779	P1L194442
P1B326117	P1G618823	P1L194585
P1B326124	P1G618847	P1L194886
P1B326278	P1G618953	P1L194965
P1B326636	P1G619110	P1L194992
P1B326650	P1G619226	P1L195043
P1B326681	P1G619349	P1L195052
P1B326704	P1G619592	P1L195140
P1B326759	P1G619684	P1L195159
P1B326797	P1G619837	P1L195177
P1B326841	P1G619950	P1L195186
P1B326902	P1G620208	P1L195195
P1B326926	P1G620482	P1L195265
P1B327077	P1G620512	P1L195283
P1B327084	P1G620741	P1L195362
P1B327268	P1G620789	P1L195423
P1B327282	P1G620888	P1L195469
P1B327299	P1G621137	P1L195520
P1B32762	P1G621212	P1L195548
P1B327671	P1G621229	P1L195575
P1B327831	P1G621243	P1L195584
P1B327961	P1G621250	P1L195618
P1B327978	P1G621304	P1L195627
P1B327985	P1G621656	P1L195654
P1B328210	P1G621663	P1L1957
P1B328319	P1G621717	P1L195715
P1B328326	P1G621762	P1L195733
P1B328333	P1G621854	P1L195742
P1B328555	P1G621885	P1L195779
P1B328609	P1G621915	P1L195797
P1B328715	P1G622172	P1L195919
P1B32887	P1G622189	P1L195980
P1B32920	P1G622202	P1L196093
P1B329262	P1G622257	P1L196109
P1B329309	P1G622271	P1L196215
P1B329316	P1G622288	P1L196307
P1B32939	P1G622462	P1L196314
P1B329453	P1G622776	P1L196321
P1B329590	P1G622783	P1L196345
P1B329637	P1G622790	P1L196499
P1B329651	P1G622882	P1L196604
P1B32975	P1G622899	P1L196666
P1B329859	P1G622981	P1L196734
P1B32993	P1G623506	P1L197007
P1B329989	P1G623520	P1L197144
P1B33008	P1G623605	P1L197311
P1B330145	P1G623612	P1L197359
P1B330176	P1G623735	P1L197403
P1B330206	P1G623766	P1L197526
P1B330275	P1G623797	P1L197588
P1B330343	P1G623827	P1L197601
P1B330381	P1G624183	P1L197779
P1B330411	P1G624350	P1L197793
P1B330749	P1G624442	P1L197854
P1B330770	P1G624497	P1L197953
P1B330817	P1G624527	P1L198059
P1B330824	P1G624589	P1L198073
P1B330831	P1G624596	P1L198172
P1B330855	P1G624633	P1L198202
P1B330886	P1G624831	P1L198219
P1B330923	P1G624916	P1L198240
P1B331159	P1G624978	P1L198295
P1B331180	P1G625012	P1L198325
P1B331203	P1G625029	P1L19840
P1B331265	P1G625036	P1L198431
P1B33132	P1G625043	P1L198462
P1B331333	P1G625074	P1L198486
P1B331418	P1G625098	P1L198714
P1B331449	P1G625135	P1L198769
P1B331531	P1G625142	P1L198837
P1B331685	P1G625234	P1L198912
P1B331692	P1G625302	P1L198936
P1B33187	P1G625333	P1L19895
P1B33196	P1G625715	P1L198950
P1B331968	P1G625814	P1L19901
P1B332026	P1G625913	P1L199056
P1B332132	P1G625975	P1L199230
P1B332170	P1G626002	P1L199261
P1B332279	P1G626071	P1L19929
P1B332378	P1G626200	P1L1993
P1B332477	P1G626255	P1L199346
P1B332507	P1G626286	P1L199568
P1B332552	P1G626446	P1L199612
P1B332705	P1G626507	P1L19965
P1B333085	P1G626552	P1L199698
P1B333238	P1G626866	P1L199865
P1B333344	P1G626965	P1L199872
P1B333399	P1G627023	P1L199889
P1B333405	P1G627092	P1L199902

‌5. Product Advantages‌

‌Fast and Selective Protection:‌ Delivers ultra-fast, highly accurate, and selective fault clearance based on precise impedance measurement, maximizing system uptime and reliability.
‌Effortless Digital Integration:‌ Full native support for industry-standard protocols like IEC 61850 ensures easy, future-proof integration into modern digital substation and smart grid environments, facilitating advanced data management and remote control.
‌Unified Lifecycle Management:‌ The integrated DIGSI 5 software suite provides a single, user-friendly platform for all device lifecycle tasks—configuration, commissioning, diagnostics, and maintenance—significantly reducing engineering effort and total cost of ownership.
‌Robust and Durable Design:‌ Engineered for high reliability in demanding conditions, featuring excellent electromagnetic compatibility (EMC) and a wide operating temperature range.
‌Comprehensive Functionality:‌ Combines core distance protection with a suite of integrated features, including advanced fault location, power quality monitoring, and extensive event logging, simplifying overall system architecture in a single device.
‌Optimal System Coordination:‌ Facilitates precise setting adjustments and seamless coordination with other protective devices in the network, creating a harmonized and effective plant-wide protection strategy that safeguards both the power infrastructure and critical industrial loads.

‌6. Analysis of Wheat Automation Technology's Website (www.wheat-auto.com)‌

Based on the provided website content, Changzhou Wheat Automation Technology Co., Ltd. explicitly identifies itself as a ‌"外贸独立站" (Foreign Trade Independent Site)‌ and a high-tech company established in May 2012. Its primary business is clearly that of an ‌international B2B distributor and supplier of industrial automation components and electrical equipment‌.

‌Business Insights:‌

‌Core Model:‌ The company operates a multilingual (English, Chinese, Russian) e-commerce portal that aggregates and sells products from a wide range of leading global manufacturers. The homepage lists major brands, including ‌SIEMENS, ABB, DeWalt, Endress&Hauser, Krohne, Honeywell, OMRON, Schneider‌, and ‌Allen-Bradley/Rockwell‌.
‌Strategic Focus:‌ The homepage places significant and repeated emphasis on products from the SIEMENS brand. Specific product listings heavily feature various "SIEMENS 7SA82/7SA86/7SA87 Distance..." protection relay models. Additionally, it includes a specific call-out for ‌SIEMENS MOTOR‌ products. This demonstrates a ‌clear strategic focus on selling SIEMENS power protection/control equipment and SIEMENS motor/drive components‌.
‌Product Categories:‌ Its portfolio spans:
1. ‌Power Protection & Control:‌ The SIEMENS distance protection relays are highlighted as a key category.
2. ‌Motor and Drive Systems:‌ Specifically mentions ‌SIEMENS MOTOR‌ products.
3. ‌Measurement & Instrumentation:‌ Brands like Endress&Hauser and Krohne.
4. ‌Professional Tools:‌ DeWalt automotive tools.
5. ‌General Automation Components:‌ Products from various other manufacturers.
‌Target Audience & Operations:‌ The website is designed as a catalog for a global audience of engineers, procurement specialists, and system integrators. It serves as a digital showroom and lead-generation tool. The company emphasizes "strict quality guarantee," "long-term friendly business relationship[s]," and encourages direct contact via ‌WhatsApp (+86 15951219765)‌ and ‌email (info@wheat-auto.com)‌.

‌Summary:‌ Wheat Automation Technology is an international B2B distributor specializing in industrial automation products, with a particularly strong and evident strategic emphasis on distributing SIEMENS power protection relays and motors.

‌7. Use Scenarios‌

‌Utility Transmission & Distribution Networks:‌ Serving as primary or backup protection for high-voltage overhead transmission lines, underground cables, and substation busbars within public utility grids.
‌Industrial Power Distribution Systems:‌ Protection of main incoming feeders, tie-lines, and critical internal distribution circuits in large manufacturing plants, mining operations, steel mills, and petrochemical facilities. This is essential for ensuring stable and high-quality power for sensitive production processes and heavy rotating equipment, including systems utilizing drive components like ‌SIEMENS MOTOR‌ products.
‌Renewable Energy Interconnections:‌ Securing the grid connection feeders between large-scale renewable energy installations (wind/solar farms) and the main utility grid.
‌Critical Infrastructure:‌ Providing reliable electrical protection for facilities where power continuity is paramount, such as data centers, hospitals, airports, and railway electrification systems.
‌Cogeneration & Industrial Power Plants:‌ Implementing comprehensive protection schemes for both internal power distribution networks and the grid interconnection points in facilities with on-site power generation capacity.

Language

Currency

‌1. Product Name‌

‌2. Product Introduction‌

‌3. Product Description‌

‌4. Product Model‌

‌5. Product Advantages‌

‌6. Analysis of Wheat Automation Technology's Website (www.wheat-auto.com)‌

‌7. Use Scenarios‌

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Language

Currency

‌1. Product Name‌

‌2. Product Introduction‌

‌3. Product Description‌

‌4. Product Model‌

‌5. Product Advantages‌

‌6. Analysis of Wheat Automation Technology's Website (www.wheat-auto.com)‌

‌7. Use Scenarios‌