SIEMENS Siprotec 4 Protection Relay

The SIPROTEC 7SA64 distance protection relay is a universal relay for protection, control and automation with a graphic display on the basis of the SIPROTEC 4 system. Its high level of flexibility makes it suitable to be implemented at all voltage levels. With this relay you are ideally equipped for the future: it offers security of investment and also saves on operating costs. High-speed tripping time

• Impedance setting range allows very small settings for the protection of very short lines
• Self-setting detection for power swing frequencies up to 7 Hz
• Current transformer saturation detector prevents non-selective tripping by distance protection in the event of CT saturation.
• Phase-segregated teleprotection for improved selectivity and availability
• Digital relay-to-relay communication by means of an integrated serial protection data interface
• Adaptive auto-reclosure (ADT)

Protection Functions

• Non-switched distance protection with 6 measuring systems (21/21N)
• High resistance earth-fault protection for single and three-phase tripping (50N, 51N, 67N)
• Earth-fault detection in 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 (50BF)
• Thermal overload protection (49)

Control Functions

• Commands for control of c.b. and isolators

Monitoring Functions

• Trip circuit supervision (74TC)
• Self-supervision of the relay
• Measured-value supervision
• Event logging
• Fault logging
• Oscillographic fault recording
• Switching statistics

Front design

• Easy operation with numeric keys
• Function keys
• LEDs for local alarm
• PC front port for convenient relay setting

Communication Interfaces

• Front interface for connecting a PC
• System interface for connecting to a control system via various protocols
• IEC 60870-5-103 protocol
• PROFIBUS-FMS/-DP
• DNP 3.0
• IEC 61850 Ethernet
• 1 serial protection data interface for teleprotection
• Rear-side service/modem interface
• Time synchronization via - IRIG-B or DCF 77 or - System interface

• Non-switched distance protection with 6 measuring systems (21/21N)
• High resistance earth-fault protection for single and three-phase tripping (50N, 51N, 67N)
• Earth-fault detection in 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 (50BF)
• Thermal overload protection (49)

• Commands for control of c.b. and isolators

• Trip circuit supervision (74TC)
• Self-supervision of the relay
• Measured-value supervision
• Event logging
• Fault logging
• Oscillographic fault recording
• Switching statistics

• Easy operation with numeric keys
• Function keys
• LEDs for local alarm
• PC front port for convenient relay setting

• Front interface for connecting a PC

• System interface for connecting to a control system via various protocols
  - IEC 60870-5-103 protocol
  - PROFIBUS-FMS/-DP
  - DNP 3.0
  - IEC 61850 Ethernet

• 1 serial protection data interface for teleprotection

• Rear-side service/modem interface

• Time synchronization via - IRIG-B or DCF 77 or - System interface

The SIPROTEC 4 7SJ61 relays can be used for line protection of high and medium voltage networks with earthed (grounded), low-resistance earthed, isolated or compensated neutral point. When protecting motors, the SIPROTEC 4 7SJ61 is suitable for asynchronous machines of all sizes. The relay performs all functions of backup protection supplementary to transformer differential protection ???

The relay provides control of the circuit breaker, further switching devices and automation functions. The integrated programmable logic (CFC) allows the user to implement their own functions, e. g. for the automation of switchgear (interlocking). The user is also allowed to generate user-defined messages. The flexible communication interfaces are open for modern communication architectures with control systems.

Protection functions

• Overcurrent protection (definite-time/inverse-time/user-def.)
• Sensitive earth-fault detection
• Intermittent earth-fault protection
• High-impedance restricted earth fault
• Inrush - Current detection
• Motor protection
  • Undercurrent monitoring
  • Starting time supervision
  • Restart inhibit
  • Locked rotor
  • Load jam protection
• Overload protection
• Temperature monitoring
• Breaker failure protection
• Negative-sequence protection
• Auto-reclosure
• Lockout

• Differential protection for 2- up to 3-winding transformers up to 5 ends (3-/1-phase)
• Differential protection for motors and generators
• Differential protection for short 2 up to 5 terminal lines
• Differential protection for busbars up to 12 feeders (phase-segregated or with summation CT)

Protection functions:

• Differential protection with phase-segregated measurement
• Sensitive measuring for low-fault currents
• Fast tripping for high-fault currents
• Restraint against inrush of transformer
• Phase /ground overcurrent protection
• Overload protection with or without temperature measurement
• Negative-sequence protection
• Breaker failure protection
• Low/high-impedance restricted ground fault (REF)
• Voltage protection functions

Control functions:

• Commands for control of circuit-breakers and isolators
• 7UT63x: Graphic display shows position of switching elements, local/remote switching by key-operated switch
• Control via keyboard, binary inputs, DIGSI 4 or SCADA system
• User-defined logic with CFC

Monitoring functions:

• Self-supervision of the relay
• Trip circuit supervision
• Oscillographic fault recording
• Permanent differential and restraint current measurement, extensive scope of operational values

Communication interfaces:

• PC front port for setting with DIGSI 4
• System interface IEC 61850 Ethernet - IEC 60870-5-103 protocol, - PROFIBUS-FMS/-DP, MODBUS or DNP 3.0
• Service interface for DIGSI 4 (modem)/ temperature monitoring (thermo-box)
• Time synchronization via IRIG-B/DCF 77

Standard version
Scope of basic version plus:

• Inadvertent energization protection
• 100 %-stator earth-fault protection with 3rd harmonic
• Impedance protection

Full version
Scope of standard version plus:

• DC voltage protection
• Overcurrent protection during start-ups
• Earth-current differential protection
• Out-of-step protection

Additional version
Available for each version:

• Sensitive rotor earth-fault protection (1-3 Hz method)
• Stator earth-fault protection with 20 Hz voltage
• Rate-of-frequency-change protection
• Vector jump supervision

• Trip circuit supervision
• Fuse failure monitor
• Operational measured values V, I, f,…
• Every metering value Wp,Wq
• Time metering of operation hours
• Self-supervision of relay
• 8 oscillographic fault records

• System interface
  – IEC 61850 protocol
  – IEC 60870-5-103 protocol
  – PROFIBUS-DP
  –MODBUS RTU
  – DNP 3.0

• Analog inputs
• 8 current transformers
• 4 voltage transformers
• 7/15 binary inputs
• 12/20 output relays

• User-friendly local operation
• 7/14 LEDs for local alarm
• Function keys
• Graphic display with 7UM623

The 7SD5 relay provides full scheme differential protection and incorporates all functions usually required for the protection of power lines. It is designed for all power and distribution levels and protects lines with two up to six line ends. The relay is designed to provide high-speed and phase-selective fault clearance. The relay uses fiber-optic cables or digital communication networks to exchange telegrams and includes special features for the use in multiplexed communication networks. Also, pilot wires connections can be used with an external converter. This contributes toward improved reliability and availability of the electrical power system. The relay is suitable for single and three-phase tripping applications for two up to six line ends.

The 7SD5 has the following features:

• 2 full-scheme main protections in one unit (differential and distance protection)
• High-speed tripping 10 – 15 ms
• The serial protection interfaces (R2R interfaces) of the relays can flexibly be adapted to the requirements of all communication media available.
• If the communication method is changed, flexible retrofitting of communication modules to the existing configuration is possible.
• Tolerates loss of one data connection in a ring topology (routing in 120 ms). The differential protection scheme is fully available in a chain topology.
• Tolerates loss of one data connection in a ring topology (routing in 120 ms). The differential protection scheme is fully available in a chain topology.
• Browser-based commissioning tool.
• Fault locator for one and two terminal measurements for high accuracy on long lines with high load and high fault resistance.
• Capacitive charge current compensation increases the sensitivity of the differential protection on cables and long lines.

Protection Functions

• Differential protection with phase segregated measurement (87L, 87T)
• Restricted ground-fault protection (87N) if a transformer is within the protection zone
• Sensitive measuring stage for high-resistance faults
• Non-switched distance protection with 6 measuring systems (21/21N)
• High resistance ground (earth)-fault protection for single and three-pole tripping (50N/51N/67N)
• Phase-selective inter-tripping (85)
• Ground-fault detection in isolated and resonant-grounded networks
• Tele (pilot) protection (85/21, 85/67N)
• Weak-infeed protection (27WI)
• Fault locator (FL)
• Power swing detection/tripping (68/68T)
• 3-stage overcurrent protection (50, 50N, 51, 51N)
• STUB bus protection (50 STUB)
• Switch-onto-fault protection (50HS)
• Over/under voltage protection (59/27)
• Over/under frequency protection (81O/U)
• Auto-reclosure (79), Synchro-check (25)
• Breaker failure protection (50BF)
• Overload protection (49)
• Lockout function (86)

Control functions

• Commands for control of circuit-breakers (isolators)

Monitoring functions

• Self-supervision of relay and protection data (R2R) communication
• Trip circuit supervision (74TC)
• Measured-value supervision
• Time metering of operating hours
• Oscillographic fault recording
• Event logging/fault logging
• Switching Statistics

Front design

• User-friendly local operation
• PC front port for relay setting
• Function keys and 14 LEDs f. local alarm

• Differential protection for two-winding transformers (3-/1-phase)
• Differential protection for motors and generators
• Differential protection for short lines
• Differential protection for busbars up to 7 feeders (phase-segregated or with summation CT)

• Differential protection with phase-segregated measurement
• Sensitive measuring stage for low-fault currents
• Fast tripping for high-fault currents
• Restraint against inrush of the transformer
• Phase/ground-overcurrent protection
• Overload protection with or without temperature measurement
• Negative-sequence protection
• Breaker failure protection
• Low-or high-impedance restricted earth fault (REF)

• Commands for control of c.b. and isolators
• Control via keyboard, binary inputs, DIGSI 4 or SCADA system
• User-defined logic with CFC

• Self-supervision of the relay
• Trip circuit supervision
• Oscillographic fault recording
• Permanent differential and restraint current measurement, extensive scope of operational values

• PC front port for setting with DIGSI 4
• System interface IEC 61850 Ethernet - IEC 60870-5-103 protocol - PROFIBUS-FMS - PROFIBUS-DP - MODBUS - DNP 3.0
• Service interface for DIGSI 4 (modem)/temperature monitoring (thermo-box)
• Time synchronization via IRIG-B/DCF 77

Siemens SIPROTEC 7SJ66 Multifunction Protection Relay is a numerical protection, control, and monitoring device. SIPROTEC 7SJ66 is featuring the "flexible protection functions". Up to 20 protection functions can be added to Siprotec 7SJ66 multifunction relay according to individual requirements. Thus, for example, a rate-of-frequency-change protection or reverse power protection can be implemented. The relay provides control of the circuit-breaker, further switching devices and automation functions. The integrated Graphical logic editor (CFC) allows the user to implement its own functions, e. g. for the automation of switchgear (interlocking). The communication interfaces support the easy integration into modern communication networks.

 SIPROTEC 7SJ66 Multifunction protection:

• Overcurrent protection
• Directional overcurrent protection
• Sensitive directional ground-fault detection
• Displacement voltage
• Intermittent ground-fault protection
• Directional intermittent ground fault protect
• High-impedance restricted ground fault
• Inrush restraint
• Motor protection
• Overload protection
• Temperature monitoring
• Under-/overvoltage protection
• Under-/overfrequency protection
• Rate-of-frequency-change protection
• Power protection (e.g. reverse, factor)
• Undervoltage controlled reactive power protection
• Breaker failure protection
• Negative-sequence protection
• Phase-sequence monitoring
• Synchro-check
• Fault locator
• Lockout
• Auto-reclosure

Control functions/programmable logic

• Commands for control of CB and of isolators
• Graphical visualization of switch positions
• Control via keyboard, binary inputs, DIGSI 4 or SCADA system
• User-defined logic with CFC (e.g. interlocking)

Monitoring functions

• Operational measured values V, I, f
• Energy metering values Wp, Wq
• Circuit-breaker wear monitoring
• Slave pointer
• Trip circuit supervision
• Fuse failure monitor
• 8 oscillographic fault records
• Motor statistics

Languages

• English, Spanish, Russian, Polish and Turkish

Communication interfaces

• System interface protocols: IEC 60870-5-103, IEC 61850, Modbus RTU, DNP3
• Electrical and optical interface
• RSTP (Redundancy Protocol for Ethernet)
• Service interface for DIGSI 4 or RTD-Box
• Front USB interface for DIGSI 4
• Time synchronization via IRIG B, DCF77

Hardware

• Spring-type terminals
• 4 current transformers
• 4 voltage transformers
• 16/22/36 binary inputs
• 7/10/23 output relays
• Graphic or 8 line display

SIPROTEC 4 leads the way in integrating protection, control, measurement, and automation functions in one device. The homogenous system platform, the unique DIGSI 4 engineering program, and extensive experience of more than a million successfully operating devices in the field worldwide – thanks to these unique advantages, SIPROTEC 4 enjoys top recognition among users worldwide. SIPROTEC 4 is the industry standard for digital protection technology today in all fields of application.

• Differential protection with phase segregated measurement (87L, 87T)
• Restricted ground-fault protection (87N) if a transformer is within the protection zone
• Sensitive measuring stage for high-resistance faults
• Non-switched distance protection with 6 measuring systems (21/21N)
• High resistance ground (earth)-fault protection for single and three-pole tripping (50N/51N/67N)
• Phase-selective intertripping (85)
• Ground-fault detection in isolated and resonant-grounded networks
• Tele (pilot) protection (85/21, 85/67N)
• Weak-infeed protection (27WI)
• Fault locator (FL)
• Power swing detection/tripping (68/68T)
• 3-stage overcurrent protection (50, 50N, 51, 51N)
• STUB bus protection (50 STUB)
• Switch-onto-fault protection (50HS)
• Over/undervoltage protection (59/27)
• Over/underfrequency protection (81O/U)
• Auto-reclosure (79), Synchro-check (25)
• Breaker failure protection (50BF)
• Overload protection (49)
• Lockout function (86)

• Commands for control of circuit-breakers (isolators)

• Self-supervision of relay and protection data (R2R) communication
• Trip circuit supervision (74TC)
• Measured-value supervision
• Oscillographic fault recording
• Event logging/fault logging
• Switching statistics

• User-friendly local operation
• PC front port for relay setting
• Function keys and 14 LEDs f. local alarm

• 2 serial protection data (R2R) interfaces for ring and chain topology

• Front interface for connecting a PC

• System interface for connection to a control system via various protocols
  – IEC 61850 Ethernet
  – IEC 60870-5-103
  – PROFIBUS-FMS/-DP and DNP 3.0

• Rear-side service/modem interface

• Time synchronization via IRIG-B or DCF77 or system interface