The generator protection device is especially designed for the protection of generators and power units.

Application

• Protection of generators of various power ratings in busbar connections with directional stator ground fault protection
• Protection of generators of various power ratings in unit connections (use of the 100% stator ground fault (20 Hz)) for larger generators
• Protection of power units with one device per protection group. In generator and unit transformer plant design, the 7UM85 realizes both generator as well as transformer protection
• Protection of synchronous motors through the use of motor and generator protection functions (e.g. underexcitation protection

Features

• Short-circuit protection (overcurrent protection, impedance protection, differential protection)
• Stator ground fault protection (90% non-directional or directional; 100% with 3rd Harmonic, real 100% protection with 20 Hz voltage injection)
• Rotor ground fault protection with various measuring methods (earth current and earth resistance monitoring)
• High-precision reverse-power protection and universal power protection
• Underexcitation and overexcitation protection
• Unbalanced load protection
• Overload protection up to the 50th harmonic and temperature monitoring via Thermo box (e.g. with PT 100)
• Out-of-step protection
• Shaft current protection (especially in hydropower applications)
• Universal overvoltage and undervoltage protection with various measuring methods
• Over- and underfrequency protection and rate of change of frequency protection
• Protection functions for grid decoupling (voltage/ frequency protection and reactive power direction undervoltage protection (QU protection)
• Additional protection for detecting faulty closing of the circuit breaker

• ATEX Certification for installing in explosive environment according the standard EN 60079-14 or the standard VDE 0165, part 1 (electric equipment for hazardous areas)

• Ruggedized design and conformal coated electronical boards for high electric strength and installations in harsh environments - as standard

• Redundant power supply optional
• High density of inputs and outputs using expansion modules for up to 2x19” rack device

• Optional arc protection with a tripping time of 3-4 ms for protection of assets and personal – Safety first
• Easy integration and retrofit of arc protection, transient ground-fault detection, transformer control, PMU and process bus for efficient network operation
• Single-Line representation selectable in small or large display
• Graphical logic editor to create powerful automation functions and switching sequences in the device according IEC 61131-3 standard
• Detection of current and voltage signals up to the 50th harmonic with high accuracy for selected protection functions and operational measured values
• Integrated electrical Ethernet RJ45 for Engineering PC and IEC 61850 (reporting and GOOSE)
• Two slots for optional plug-in modules for serial and/or Ethernet-based protocols
• Optional communication module with further 3 slots plug-in modules for serial and/or Ethernet-based protocols and full availability of the communication ring when the switchgear is enabled for servicing operations by means of separate auxiliary power supply of the communication module
• Large number of serial and Ethernet-based protocols: IEC 60870-5-103, DNP3 serial and TCP, Modbus TCP, IEC 60870-5-104, PROFINET, and IEC 61850 Ed1 and Ed2.1
• Reliable data transmission via Ethernet redundancy protocols PRP and HSR, for process bus and high-availability station communication
• IoT interface for integration in cloud based systems
• Serial protection data communication via optical fibers, two- wire connections and communication networks (SDH networks, MPLS electrical power systems, for example using IEEE C37.94, and others), including automatic switchover between ring and chain topology.
• Powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)
• Easy, fast and secure access to device via Web-Browser from the device: Download of logs as files according IEEE C37.239 COMFEDE with https connection
  Fault recording: Download, delete and triggering of fault records
  Displaying of Single line diagrams and device display pages, indications, vector diagrams of energizing quantities
  Parameterization: Change of settings within an active setting-group
• Optional Phasor Measurement Unit (PMU) for detection of Synchrophasor measured values and transmission with standard IEEE C37.118 protocol
• Time Synchronization with IEEE 1558v2/PTP, PPS, IRIG-B
• Role-based Access Control (RBAC) with central user management in RADIUS/Active Directory
• Protection against unauthorized access to device through inbuilt RADIUS authentication and authorization option
• Standard roles and rights in adherence to standards and guidelines such as IEC 62351-8, IEEE 1686 and BDEW White paper
• Syslog support for central recording and logging of security-relevant events and alarms in accordance with the requirements and regulations such as IEEE 1686, IEC 62443 and BDEW Whitepaper
• Individual Assignment of write and read permission for each device port
• Auxiliary functions for simple tests and commissioning

Housing

Robust hardware in the form of a closed housing for maximum strength in terms of voltage, EMC, climate and mechanical stress in accordance with the IEC 60255 product standard and an extended temperature range of -25°C to + 70°C.

Additional conformal coating of the electronic components for maximum availability even under extreme environmental conditions.

Housing width 1/3 x 19 inches to 2/1 x 19 inches with large, small or without display. Flexible adjustable and expandable I/O quantity structure within the scope of the system with 1/6 expansion modules.

ATEX Certification:

Certification for installing in explosive environment according the standard EN 60079-14 or the standard VDE 0165, part 1 (electric equipment for hazardous areas)

O without

x with Certification

Type of housing:

X Flush mounting

O Surface mounting

Power Supply:

X Standard

O Redundant

Operation panel:

X Integrated

O Detached HMI, only for surface mounting housing

Type of display:

O No display

X Small Display

O Large Display

Key switch:

X without

O with, only for flush mounting housing

LEDs/Push buttons:

X 16 LEDs

O 32 LED

O 48 LED

O 64 LED

O 80 LED

O 8 Push buttons + LEDs

Binary inputs and outputs / measuring inputs

The number of inputs and outputs is flexible and expandable with 1/6 expansion modules plugged on the 1/3 base unit of a modular system.

O 11 BI, 9 BO, 4 CT, 4 VT, 1/3 x 19 inches

X 7 BI, 14 BO, 4 CT, 4 VT, 1/3 x 19 inches

O 15 BI, 20 BO, 8 CT, 8 VT, 1/2 x 19 inches

O 11 BI, 16 BO, 8 CT, 7 VT, 4 TD, 1/2 x 19 inches

O 15 BI, 20 BO, 14 CT, 7 VT, 4 TD, 2/3 x 19 inches

Rated auxiliary voltage

O DC 60 to 125 V DC

X DC 110 V-250 V, AC 100V - 230 V

Communication

The base unit has two free slots on the rear for plug-in modules for communication or special applications. The base unit is expandable with a communication module with up to three further slots for plug-in modules.

• USB operator interface on the front for notebook or PC
• D-Sub 9-interface, rear for time synchronization
• Integrated Ethernet interface
  X for Engineering Tool
  O for Engineering Tool and IEC 61850 Reporting and GOOSE
  O for Engineering Tool and IEC 61850 Reporting
• Communication module, max 1 for each device with additional 3 slots plug-in modules for serial and/or Ethernet-based protocols and full availability of the communication ring when the switchgear is enabled for servicing operations by means of separate auxiliary power supply of the communication module
  X without
  O with one communication module for up to three additional plug-in modules
• Serial Plug-In modules for asynchronous serial protocols like IEC 60870-5-103, DNP for system port
  X Without
  O electrical, 1 interface
  O electrical, 2 interface
  O optical 820 nm, 1.5 to 2km ,1 interface
  O optical 820 nm, 1.5 km to 2km, 2 interface
• Serial Plug-in modules for protection interface for unidirectional data exchange

X without

O optical 1300 nm, max. 24 km via 2 single mode optical fibers or max. 4 km via 2 multimode optical fibers, 1 interface

O optical 1300 nm, max. 24 km via 2 single mode optical fibers or max. 4 km via 2 multimode optical fibers, 2 interface

O optical 1300 nm, max. 60 km via single mode optical fiber, 1 interface

O optical 1300 nm, 60 km via single mode optical fiber, 2 interfaces

O optical 1550nm, 100 km via single mode optical fiber, 1 interface

O optical 1550nm, 100 km via single mode optical fiber , 2 interfaces

• Serial Plug-in modules for protection interface for bidirectional data exchange

O without

O optical 1300 nm, max. 40 km via one single- mode optical fiber (with integrated fiber-optic multiplexer, 1 interface)

O optical 1300 nm, max. 40 km via one single- mode optical fiber (with integrated fiber-optic multiplexer, 2 interfaces)

O optical 1550 nm, max. 40 km via one single- mode optical fiber (with integrated fiber-optic multiplexer, 1 interface)

O optical 1550 nm, max. 40 km via one single- mode optical fiber (with integrated fiber-optic multiplexer, 2 interfaces)

• Plug-in Modules for Ethernet

O Without

O 2x RJ45 electrical, configurable with or without integrated switch with max. distance of 20 meters

O 2x optical duplex LC 1300 nm interface, configurable with or without integrated switch. The maximum optically permitted distance via 50/125 µm or 62.5/125 µm multimode optical fibers is 2 km.

O 2x optical for process bus, duplex LC 1300 nm interface, configurable with or without integrated switch. The maximum optically permitted distance via 50/125 µm or 62.5/125 µm multimode optical fibers for up to 2 km.

O 2x optical for process bus, duplex LC 1300 nm interface, configurable with or without integrated switch. The maximum optically permitted distance via 50/125 µm or 62.5/125 µm multimode optical fibers for up to 24 km.

The optical transmission and receiving level are measured in the module and can be displayed.

In accordance with the selected communication interface the required communication protocol should be easily activated via the engineering tool depending on the selected type of serial or Ethernet plug-in module

• Serial protocols
  IEC 60870-5-103
  DNP3 serial
• Ethernet protocols
  IEC 61850 Edition 2.1
  IEC 61850-8-1 Client-Sever Communication
  IEC 61850-8-1 GOOSE
  IEC 61850-9-2 Merging Unit
  IEC 61850-9-2 Process-Bus Client
  IEC 60870-5-104
  DNP3 TCP
  Modbus TCP
  PROFINET IO
  IEEE C37.118 protocol (Synchrophasor, PMU)
• Additional Ethernet protocols and services
  DHCP, DCP (with automatic IP configuration)
  Line mode
  RSTP, PRP, HSR Ethernet ring redundancy
  SNTP time synchronization via Ethernet
  SNMP V3 network management protocol
  IEEE 1588v2 PTP protocol via Ethernet

Plug-in modules for various applications

O Measuring-transducer module with four 20-mA analog inputs

O Arc protection module with up to 3 optical point or line sensors per arc protection plug-in module, up to max. 15 sensors for modular devices
X Point sensors with line lengths from 3 m to 35 m.
O Line sensors detect arcs along the entire sensor length.
  Lengths from 5 m to 40 m are available.
  Line sensors are connected via a line to the arc protection module.

Functionality

The protection device is equipped with the following protection functions:

X Basic functions

• Overexcitation protection (24)
• Undervoltage protection: "3-phase" or "positive-sequence V1” or “universal Vx” (27)
• Undervoltage protection: "3-phase" or “universal Vx” (27)
• Reverse power protection (32R)

• Undercurrent (37)
• Temperature supervision (38)
• Negative-sequences overcurrent protection(46)
• Unbalanced-load protection (thermal) (46)
• Overvoltage protection, negative-sequence system (47)
• Overvoltage protection, "negative-sequence system V2" or "negativ-sequence V2/positive-sequence V1" (47)

• Thermal overload protection (49)
• Thermal overload rotor protection (motor) (49R)
• Overcurrent protection, phase (50/51 TD)
• Instantaneous high-current protection (50Hs)
• Overcurrent protection with positive-sequence current I1 (50/51 TD)
• Overcurrent protection, ground (50N/51N TD)
• Overcurrent protection, 1-phase (50N/51N TD)
• Overcurrent protection, voltage depndent (51V)
• Overvoltage protection, "3-phase" or "zero-sequence system V0" or
  "universal Vx" (59, 59N)
• Stator ground-fault protection (non-directional, directional) (59N,67Ns)
• Rotor ground-fault protection 64F, frated

• Trip-circuit supervision (74TC)
• Closed-circuit supervision supervision (74CC)
• Frequency protection "f>" or "f<" or "df/dt" (1x) (81)
• Lockout (86)
• Measured values
• Basic PQ measurements: THD and harmonics
• Switching-statistic counters
• Logic editor
• Inrush-current detection
• External trip initiation
• Control
• Monitoring and supervision
• Fault recording of analog and binary signals
• Frequency tracking groups
• Temperature acquisition via communication

Optional functions

O Immpedance protection for transformer(21T)

O Synchrocheck, synchronizing function (25)

O Synchronizing function with balancing commands (25)

O Rate-of-voltage-change protection (27R/59R)

O Undervoltage-controlled reactive power protection

O Power protection active/reactive power (32, 37)

O Power-plant disconnection protection (37)

O Underexcitation protection (40)

O Negative-sequence system overcurrent protection with direction (46)

O Starting time supervision for motors (48)

O Hot spot calculation (49H)

O Field-winding overload protection (49F)

O Stator overload protection with cold-gas consideration (49S, CG)

O Rotor overload protection with cold-gas consideration (49R, CG)

O Instantaneous tripping at switch onto fault SOTF

O Sensitive ground-current protection n for systems with resonant or isolated neutral a)3I0>, b)admittance Y0>, c)3I0-harm> (50Ns/51Ns)

O Sensitive ground-current protection for systems with resonant or isolated neutral systems (50Ns/51Ns)

O Intermittent ground-fault protection

O Shaft-current protectioni (50GN)

O Inadvertent energization protection (50/27)

O Direct-current/direct voltage protection (50N DC, 27,59F DC)

O Startup overcurrent protection (50)

O Circuit breaker failure protection (50BF)

O Circuit breaker restrike protection (50RS)

O Load jam protetction (50L)

O Stator ground-fault protection with 3rd harmonic (27TH, 59TH, 59THD)

O Turn-to-turn fault protection (59N IT)

O Voltage comparison supervision

O Stator ground-fault protection 100% (20Hz) (64S)

O Rotor ground-fault protection RRG< (64 (1-3Hz)

O Restart inhibit for motors (66)

O Directional time-overcurrent protection for ground-faults (67N)

O Directional sensitive ground-fault detection for systems with resonant or isolated neutral incl. a) 3I0>, b) V0>, c) Cos-/SinPhi, d) Transient ground fault fct, e)Phi(V,I), f)admittance (67Ns)

O Directional stage with a harmonic
Note: This stage additionally requires the function 50Ns/71Ns or 67Ns
"Sensitive ground-fault detection for systems with resonant or isolated neutral"

O Direct Intermittent ground-fault protection

O Power-swing blocking (68)

O Out-of-step protection (78)

O Frequency protection "f>" or "f<" or "df/dt" (81)

O Abnormal frequency protection (81AF)

O Under Frequency Load Shedding (81U)

O Vector-jump protection

O Busbar differential protection for maschine protection (87B)

O TRansformer differential prtoection (87T)

O Restricted ground-fault protection (87N T)

O Motor differential protection (87M)

O Genrator differential protection (87G)

O Automatic Voltage controller (90V)

O Fault locator, single-sided

O Point-in-Wave Switching (PoW)

O Synchrophaser measurement PMU

O Process Bus Client Protocol (PB Client)
Note: Dedicated Ethernet plug-in module for process bus required

O Additional IEC 61850-9-2 Merging Unit stream (1x) (MU)
Note: Dedicated Ethernet plug-in module for process bus required

O Circuit breaker wear monitoring

O Cyber Security: Role Base Access Control (RBAC)

O Cyber Security: IEEE 802.1x based network authentication