Protection Relay - Overcurrent & Differential Protection for Power Grid & New Energy
Protection Relay Original Genuine Overcurrent Differential Protection for Power Grid & New Energy
These genuine Siemens protection relays provide stable overcurrent and differential protection, widely used in power grids, new energy, industrial automation and infrastructure to ensure safe, reliable and long-term operation of your power system.
Industrial Protection Relays - Complete Model & Parameter List
SIPROTEC 4 Series (Medium & High Voltage Comprehensive Protection)
| Series | Complete Model | Key Parameters | Typical Applications |
|---|
| SIPROTEC 4 | 7SJ61, 7SJ62, 7SJ63, 7SJ64, 7SJ66, 7SJ68 | Overcurrent/directional overcurrent/feeder/motor/transformer protection; IEC 61850 supported, fault recording, DIGSI 4 configuration | Medium & high voltage power grids, substations, motor/transformer protection, industrial power distribution |
| SIPROTEC 4 | 7SA522, 7SA61, 7SA63, 7SA64 | Distance protection, long line/cable protection, power oscillation blocking | Transmission lines, long-distance cables, regional power grid protection |
| SIPROTEC 4 | 7SD52, 7SD53, 7SD610, 7SD680, 7SD686 | Line/transformer/generator-transformer differential protection, multi-terminal differential | Transformers, busbars, generator-transformer units, large industrial power supply systems |
| SIPROTEC 4 | 7UT612, 7UT613, 7UT633, 7UT635, 7UT682, 7UT683, 7UT686 | Transformer differential protection, ratio restraint, multi-winding adaptation | Power transformers, industrial main transformers, power substations |
| SIPROTEC 4 | 7UM61, 7UM62 | Generator-transformer comprehensive protection (loss of excitation/out-of-step/over-excitation) | Generator-transformer units, power plants, large industrial captive power plants |
| SIPROTEC 4 | 7SS52, 7SS60 | Busbar differential protection, circuit breaker failure protection | Substation busbars, complex wiring systems |
| SIPROTEC 4 | 7RW600, 7RW680 | Voltage/frequency/over-excitation protection, system splitting | Distribution networks, capacitor banks, voltage abnormality monitoring |
| SIPROTEC 4 | 7VK61 | Circuit breaker management, end fault protection | Circuit breaker control, substation automation |
SIPROTEC 5 Series (High-End Intelligent Protection)
| Series | Complete Model | Key Parameters | Typical Applications |
|---|
| SIPROTEC 5 | 7SJ81, 7SJ82, 7SJ85, 7SJ86 | Overcurrent/feeder/motor/capacitor protection, advanced fault analysis, digital twin | Smart grids, large industrial projects, new energy grid connection |
| SIPROTEC 5 | 7SL82, 7SL86, 7SL87 | Line differential + distance protection, high-speed action, PMU synchrophasor | Key transmission lines, smart substations |
| SIPROTEC 5 | 7SD80, 7SD82, 7SD86, 7SD87 | High-sensitivity line differential protection, multi-terminal differential | Cable lines, regional power grid differential protection |
| SIPROTEC 5 | 7UT85 | Transformer differential protection, multi-winding, advanced monitoring | Large power transformers, industrial main transformers |
| SIPROTEC 5 | 7UM85 | Generator-transformer comprehensive protection (loss of excitation/out-of-step/over-excitation) | Generator-transformer units, power plants |
| SIPROTEC 5 | 7SK82, 7SK85 | Busbar protection, circuit breaker failure protection | Smart substation busbars |
| SIPROTEC 5 | 7VE85 | Synchronizing device, grid connection control | Power plants, new energy station grid connection |
| SIPROTEC 5 | 7SX800, 7SX82, 7SX85 | Universal protection, automation & measurement integration | Medium & low voltage distribution, industrial automation |
| SIPROTEC 5 | 7SY82 | Universal protection, LPIT sensor compatible | Medium voltage grids, distribution automation |
SIPROTEC Compact Series (Cost-Effective Compact Protection)
| Series | Complete Model | Key Parameters | Typical Applications |
|---|
| SIPROTEC Compact | 7SJ80, 7SJ81, 7SJ82 | Overcurrent/feeder/motor/capacitor protection; compact size, easy installation, CFC programmable | Medium & low voltage distribution, small & medium industries, buildings, PV/wind power |
| SIPROTEC Compact | 7RW80 | Voltage/frequency/over-excitation protection, system splitting | Distribution networks, capacitor banks, voltage abnormality monitoring |
| SIPROTEC Compact | 7SX800 | Universal protection, automation & measurement integration | Compact scenarios, distribution panels |
SIRIUS Series (Low Voltage Motor Protection)
| Series | Complete Model | Key Parameters | Typical Applications |
|---|
| 3RU (Thermal Overload Relay) | 3RU11, 3RU16, 3RU21, 3RU51, 3RU61 | Thermal overload protection; 0.1-63A; trip class 10/20/30; thermal memory | Low voltage motors, fans, pumps, conveyors, OEM equipment |
| 3RB (Electronic Overload Relay) | 3RB20, 3RB21, 3RB30, 3RB31 | High-performance overload/short-circuit protection; 0.1-630A; matched with 3RT contactors | High-power motors, industrial production lines, equipment manufacturing |
| 3RV (Motor Starter/Circuit Breaker) | 3RV20, 3RV21, 3RV23, 3RV24, 3RV27, 3RV28 | Motor starter/circuit breaker; short-circuit quick break (13×In); S00-S3 size | Motor circuits, machine tools, pumps & valves, small industrial equipment, control panels |
P1J Series (Medium & Low Voltage Distribution Protection)
| Series | Complete Model | Key Parameters | Typical Applications |
|---|
| P1J | P1J1135619, P1J1212891, P1J130, P1J193355, P1J222596, P1J223373, P1J223717, P1J223753, P1J223878, P1J223948, P1J31055, P1J36573, P1J368959, P1J37800, P1J39808, P1J40150, P1J446433 | Digital overcurrent/feeder protection; 3-stage logic; easy installation | Medium & low voltage feeders, distribution panels, industrial plants, municipal power distribution |
Frequently Asked Questions
Q: Do you have stock for regular models?
A: There is a large quantity of goods in stock.
Q: Can I order small quantities?
A: Yes, small orders for project use are acceptable.
Q: What certifications do you have?
A: CE, IEC, UL, VDE, fully compliant with international standards.
Q: Can they replace other brands?
A: Yes, can replace ABB, Schneider, Alstom similar protection relays.
Q: How long is the lead time?
A: Normally 1 weeks; some hot models 1-2 weeks.
Q: Are they 100% original and new?
A: Yes, brand new original with traceable serial number.
Q: What's the MOQ?
A: No strict MOQ, order as per your project needs.
Q: What are the main applications?
A: Power grid, industrial automation, new energy, infrastructure, oil & gas.
Q: How long is the warranty?
A: 1-2 years under normal operation.