Technical Specifications
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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
Main function:
1 differential protection function (standard or auto transformer) with additional stabilization
Up to 2 restricted ground-fault protection functions
Measuring Points:
5 x 3-phase current measuring points
3 x 1-phase current measuring points
3 x 3-phase voltage measuring points
Expandable to 3 sides
Inputs and Outputs:
2 predefined standard variants with 8 current transformers
7 to 19 binary inputs
7 to 23 binary outputs
Hardware Flexibility:
Expandable I/O structure within the SIPROTEC 5 modular system
Housing Width:
1/3 × 19 inches to 2/1 × 19 inches
Interoperability:
Compatible with SIPROTEC 5 and SIPROTEC 4 line protection devices
Applications:
Transformer protection with overload protection
Backup protection for downstream power systems
Ground-fault protection (REF)
Circuit-breaker failure protection
Protection Functions:
Distance protection with 6 measuring systems (21/21N)
High resistance earth-fault protection (50N, 51N, 67N)
Earth-fault detection for isolated and resonant-earthed networks
Tele (pilot) protection (85)
Fault locator (FL)
Power swing detection/tripping (68/68T)
Phase-overcurrent protection (50/51)
Switch-onto-fault protection (50HS)
STUB bus overcurrent protection (50STUB)
Overvoltage/undervoltage protection (59/27)
Over/underfrequency protection (81O/U)
Auto-reclosure (79)
Synchro-check (25)
Breaker failure protection (59BF)
Thermal overload protection (49)
Control Functions:
Commands for control of circuit breakers and isolators
Monitoring Functions:
Trip circuit supervision (74TC)
Relay self-supervision
Measured-value supervision
Event and fault logging
Oscillographic fault recording
Switching statistics
Front Design:
Easy operation with numeric keypad and function keys
LEDs for local alarm indication
PC front port for DIGSI 4 configuration
Communication Interfaces:
Front interface for PC connection
System interface for control system communication:
IEC 61850 Ethernet
IEC 60870-5-103
PROFIBUS-FMS / DP
DNP 3.0
1 serial protection data interface for teleprotection
Rear-side service/modem interface
Time synchronization via IRIG-B, DCF77, or system interface
