Inputs: 4xI
Protection Functions: Overall differential protection (87/50G), Restricted Earth Fault (87REF), Earth Fault (50G)
Supervision Functions: CT Supervision (CT50), Fault Clearance Monitor (87/50BF)
Monitoring Functions: Instrumentation
Additional Functions: IEC 61850 option, Eight setting groups, Password protection, Self-monitoring, Fault/event/waveform records
Housings: E6 or E8
Applications: Distribution networks, industrial plants, and high-impedance protection systems
Main function: Typical generator and motor protection functions
Certification: ATEX Category 5, EN 60079-14
Inputs/Outputs:
5 predefined variants
Up to 16 current transformers (CT)
Up to 8 voltage transformers (VT)
7–15 binary inputs
9–20 binary outputs
4 fast measuring transducer inputs (10 V or 20 mA)
Hardware flexibility: Expandable/modular SIPROTEC 5 system; 1/6 expansion modules possible; large, small, or no display
Width of housing: 1/3 × 19” to 2 × 19”
Application:
Protection of generators in unit connection of different power
Protection of power plant units per protection group
Generator-transformer variant: protection of generator and transformer
Complex units: additional SIPROTEC 5 devices such as 7UT8x, 7SJ82/85, 7SA/SD/SL86
Motor and generator protection functions including underexcitation protection
Local availability in Mumbai for quick support and delivery
Key Features & Benefits:
Complete motor protection: short-circuit, overload, earth fault, abnormal conditions
Enhanced monitoring: real-time measurement and fault logging
Flexible application: LV and MV motor protection for industrial and utility setups
User-friendly design: easy SCADA/automation integration
Operational efficiency: reduces downtime, improves energy efficiency, extends motor life
Ideal for industries in Mumbai and India: manufacturing plants, utilities, process industries, heavy machinery
Application:
Protects motors during all starting and running sequences
Thermal algorithm optimized for motor characteristics
Thermal monitoring via plant temperature sensors
Standard Functionality:
14 Locked rotor protection
37/37G Undercurrent protection – phase/earth
46BC Broken conductor detection
46PR Phase-rotation reversal
46UB Phase unbalance
50BCL Break capacity limit
86 Lockout
Optional Functionality (7SR57):
27/27Vx Undervoltage protection
32 Power protection
47 Sequence protection
55 Power factor
59/59Vx Overvoltage protection
81R Frequency protection – “df/dt“
Monitoring Functions:
Primary, secondary, and phase sequence current & voltage
Frequency, power, and energy
Fault data, event, and records
Motor start data log
Communication: IEC 60870-5-103, MODBUS-RTU, DNP3, IEC 61850
