Generator Protection

7UM512 Generator protection relay (Version V3)

Scope of functions 51 32

51/37

32 VAR

64 DC

46

59

64

27

64 R

81

Fig. 1 7UM512 generator protection relay (V3)

Application The 7UM512 unit is a numerical generator protection relay that provides a practical combination of protection functions for generators. The unit contains all the protection functions required for small generators, such as emergency generators or private power plants. The unit is also a module in comprehensive protection systems for large generators based on the 7UM51 range. The 7UM51 is supplemented by 7UT51 differential protection relays. Construction The unit is of compact construction and comprises all components for: D Measured value acquisition and evaluation D Operation and display D Indication and command output D Acquisition of binary signals D Serial data transmission D Auxiliary voltage supply The unit is supplied with housings for flush and surface mounting. The model for panel flush mounting or cubicle mounting has rear connection terminals and can be supplied with or without a glass cover. The model for panel surface mounting has 100 screw terminals accessible from the front.

Functions The unit contains the following integrated protection functions: D Overcurrenttime protection (with undervoltage seal-in) D Over/undercurrent protection D DC voltage protection D Single-phase overvoltage protection D Single-phase undervoltage protection D Overfrequency protection D Underfrequency protection D Active power protection D Reactive power protection D Unbalancedload protection D Stator earth-fault (directional) protection D Direct coupling (for separate protection equipment) D Tripping circuit monitoring Measurement method The influences of superimposed harmonics, high-frequency transients, transient DC current components and differing CT saturation levels is suppressed to a large degree by the use of a powerful microprocessor and complete digital signal processing (measured value acquisition, measured value conditioning and measured value processing). Precise measurement of the current and voltage over a wide frequency range of 10 to 68 Hz is achieved by adapting the sampling rate.

Some protection functions make use of the symmetrical current component. A change in the phase sequence, which can occur when the direction of rotation is reversed in a pumped-storage power plant, is taken into account by the protection relay. The phase sequence is also signalled to the protection relay as a binary indication. Serial interfaces The relay is equipped with two serial interfaces. The interface at the front is suitable for connection of an AT-compatible personal computer. An operating and analysis software program DIGSI is available for convenient and clear setting, evaluation of fault records and data, as well as for commissioning. The interface on the rear of the unit is either an isolated V.24 interface or an 820-nm fibreoptic interface. It is used either as a system interface for connecting to the SINAUT LSA substation control and protection, i.e. to a protection data master unit (protocol acc. to VDEW/ZVEI recommendation, company-specific), or as an operating interface for connecting a PC. Settings All setting parameters can be input either via the integrated operator and display panel or via a personal computer. The operator is guided through the setting process. The parameters are written into nonvolatile memories so that the settings remain secure even during interruption of the supply voltage.

Siemens LSA 2.5.3 . February 1997

1 e Siemens AG 1997

Generator Protection

7UM512 Generator protection relay (Version V3)

Selfmonitoring All important hardware and software components are monitored continuously. Any irregularities in the hardware or in the program sequence are immediately detected and alarmed. This significantly improves the security and the availability of the protection system. Overcurrenttime protection (ANSI 51) This stage is for use as short-circuit and standby protection for protection gear connected upstream, such as differential protection or distance protection. An undervoltage stage provides the option of maintaining the overcurrent excitation if the current returns below the starting threshold and at the same time the voltage drops because the excitation system cannot be powered sufficiently. Over/undercurrent protection (ANSI 51/37) The undercurrent protection is versatile. It detects disconnected and interrupted lines or, when used as protection for large motors, mechanical faults in the driven machine that can cause the motor to be off-loaded. With this function, it is also possible to implement simple circuitbreaker protection. The protection function can be ANDed or ORed with an input binary signal. DC voltage protection (64 DC) The protection function is designed for generators that are started with a frequency converter. It protects the generators (and the parts of the station that are galvanically connected with them) from DC voltage. The function can respond to violation either of an upper or a lower limit value. Overvoltage protection (ANSI 59) The protection prevents insulation faults due to an excessive voltage. The protection function evaluates a phase-to-phase voltage. It provides two stages.

c=5 c=4

c=6

V (V)
160 150 140

c=3

130 120

c=2

110 100 90 80

c=1 70 60 c=0

f (Hz)
44 45 46 47 48 49 51 52 53 54 55

fN = 50Hz

Fig. 2 Frequency-dependent undervoltage function (Vset < 60 V)

Undervoltage protection (ANSI 27) Undervoltage protection compares a phase-to-phase voltage with a lower limit value. This function is used for asynchronous motors and pumpedstorage motorgenerators and prevents instability due to voltage. To stabilize the voltage during a power deficiency, the undervoltage protection function can be used for load shedding. A further criterion for power deficiency in networks is a drop in the frequency below the nominal frequency. To combine the two criteria in a protection function, the response value of the undervoltage function can be made to depend on the frequency. If the network frequency then deviates from the nominal frequency, the undervoltage threshold is raised. Frequency time protection (ANSI 81) The 7UM512 protection relay contains two-stage frequency protection. Each stage can be used as either an overfrequency or underfrequency protection. The algorithm filters out the fundamental reliably even from distorted voltages and performs a fast and precise frequency calculation.

Active power protection (ANSI 32) The protection relay can utilize as protection criterion either exceeding of the power output of a generator or exceeding of the power input (reverse power). The power is calculated by the 7UM512 protection relay from a phase-to-phase voltage and a phase current. The monitoring of the power output of a generator can be useful for starting and shutting down generators. As reverse power protection, the function protects the driving steam turbines and is also used for service shutdown of the generator. Reactive power protection (ANSI 32 VAR) This protection function can be used as a single-stage underexcitation protection. It protects the generator from falling out of step because of underexcitation. The reactive power is calculated from a phase-to-phase voltage and a phase current.

Siemens LSA 2.5.3 . February 1997

Generator Protection

7UM512 Generator protection relay (Version V3)

Unbalancedload protection (ANSI 46) Asymmetrical current loads of the three phases of a generator cause heating of the rotor because of the reverse field that arises. This protection function detects an asymmetrical load on three-phase generators. It works on the principle of the symmetrical components and evaluates the negative system of phase currents. The heating in the generator is calculated in the protection relay. Separately settable warning and tripping stages compare the calculated overtemperature with the corresponding threshold values. Moreover, the unbalanced load of an independent stage to which a delay element has been added is evaluated. Stator earth-fault protection (ANSI 64) On generators operated in isolation, an earth fault results in the occurrence of a displacement voltage in the generator neutral point. In a unit connection, a displacement voltage is a sufficient, selective protection criterion. If a generator is galvanically connected with a busbar, the direction of the earth current flowing must also be evaluated for selective earthfault detection. A directional earth fault protection function is required. The 7UM512 protection relay measures the displacement voltage with a special input on a voltage transformer at the generator neutral point or at the open delta winding of a voltage transformer. In this way, earthfault protection for up to 95% of the stator winding of a generator operated in a unit connection is possible. For the earth current, a separate current measuring input is also available. The stator earthfault protection function can thus also function as a directional earthfault protection. It is possible to switch between the two modes with a coupled external binary signal (circuit-breaker position).

t TALARM

Unbalanced load alarm stage I2>

Thermal trip stage

Thermal alarm stage

Unbalanced load trip stage I2>>

T>>TRIP
I2perm Fig. 3 Trip range of the unbalancedload protection I2>> I2

IL

I< 0.05 IN

& 60 s &

Trip command

BI Generator breaker closed Interlocking by excitation breaker at start up BI

Fig. 4 Example: Automatic shutdown of idling generator

IL

I> 1.1 IN

& 0.5 s &

Trip of surrounding breaker

BI Start by protection trip command (doubled for safety reasons)

BI

Fig. 5 Example: Circuit-breaker failure protection

Siemens LSA 2.5.3 . February 1997

Generator Protection

7UM512 Generator protection relay (Version V3)

Rotor earthfault protection (ANSI 64R) This function is designed to detect earth faults in the exciter and uses an auxiliary AC voltage of approx. 45 V. The protection calculates the resistive component of the complex earth impedance from this auxiliary voltage and from the earth current flowing. This protection provides two stages. The high-impedance measuring stage can be used as an alarm, whereas the low-impedance measuring stage can be used to disconnect the generator. Interruptions in the measuring circuit are detected by the 7UM512 and can be signalled if required. Direct coupling Direct coupling functions are functions of the 7UM512 that are used for acquisition of binary information. This binary information is entered in the fault indication memory. Such information can actuate LEDs, alarm relays and command relays. Each direct coupling can delay the effect of the binary information by an individual timer. The direct coupling function is used for processing of information from the Buchholz relay or generator commands. Tripping circuit monitoring The 7UM512 protection relay is able to monitor two tripping circuits (circuitbreaker coils including incoming cables) for correct functioning. Operational measurement The values acquired and calculated by the unit can be displayed on the LD display or on a PC. These include: Conductor currents and voltages (both primary and secondary), earth current, neutral voltage, current positive-sequence component, frequency, active and reactive power, power factor, current-voltage angle, excitation voltage, negative-sequence component of the conductor currents overtemperature due to unbalanced load. Fault recording In the protection relay, instantaneous or rms values are implemented depending on your selection. The recording duration is up to 5 s for instantaneous values and up to 60 s for rms values. In the 7UM512 protection relay, primary values of up to eight faults can be stored. The total number depends on the duration of each fault and the parameterized longest recording duration. Setting a leading and trailing time and the start event (start on activation or on trip) permits adaptation to different requirements. The fault data can be transferred to the SINAUT LSA substation control and protection or to a PC and evaluated there. Trip matrix/trip circuits The unit is equipped with five trip relays. These can be arbitrarily assigned to the above mentioned protection functions by parameterization (software matrix). Furthermore, each protection function can be switched On or Off via the operator panel. A third Blocked mode permits commissioning of the unit with the local annunciations and the alarm relay circuits operative, but without tripping of the circuit-breakers. With the many parameterizing possibilities provided, testing of and alterations to the circuit-breaker operation can be performed during commissioning, as well as during normal operation without the need for rewiring. Indication memory The unit provides detailed data for the analysis of faults and for checking states during operation. All the indication fault memories listed below are protected against power supply failure. D Time The unit has a battery-backed clock that can be synchronized with a binary signal or via the system interface. All indications are assigned a time and date. D Fault indications The indications of the last three faults can be retrieved at any time. D Operational indications All indications that are not directly associated with a fault are stored in the operational indication buffer. Assignable alarm relays, LEDs and binary inputs The alarm relays and LEDs can be freely assigned for user-specific output and display of indications. The storable LED displays are protected against power supply failure. All binary inputs can be operated either as make circuits or as break circuits. They can also be assigned as defined by the user. The signal input at a binary input can be logically combined with several protection functions.

Siemens LSA 2.5.3 . February 1997

Generator Protection

7UM512 Generator protection relay (Version V3)

Technical data
Input circuits Rated current Rated voltage, can be parameterized Rated frequency, can be parameterized Thermal overload capability in voltage path, continuous in current path, continuous 1s 10 s in earth current path, continuous 1s 10 s DC voltage inputs, continuous Power consumption in voltage path at VN = 100 V in current path at IN = 1 A at IN = 5 A Rated auxiliary voltage Vaux 1 or 5 A 100 to 125 V AC 50/60 Hz 140 V AC 4 x IN 100 x IN 20 x IN 15 A 300 A 100 A 60 V DC < 0.3 VA < 0.1 VA < 0.5 VA 24, 48 V DC or 60, 110, 125 V DC or 220, 250 V DC 20 to + 15 % max. 16 W 0.1 x IN to 8 x IN 0 to 32 s 0.9 to 0.99 Approx. 40 ms 20 to 100 V 0 to 32 s 1.05 0.05 to 8 A 0 to 32 s 0.95 1.05 Approx. 40 ms 0.1 to 8.5 V 0 to 32 s Approx. 0.98 1.1 <60 ms <200 ms

Voltage supply via integrated DC/DC converter

Setting ranges Overcurrent time protection (ANSI 51) Current I> Trip delay, resetting delay Reset ratio (settable) Response time Undervoltage seal-in V< Excitation hold time during undervoltage Reset ratio Over/undercurrent protection (ANSI 51/37) Current I>< Trip delay, resetting delay Reset ratio for I> for I< Response time DC voltage protection (V = ><) (ANSI 64 DC) Voltage V = >< Trip delay, resetting delay Reset ratio V=> V=< Response time for operating state 1 0 Voltage V>, V>> Trip delay, resetting delay Reset ratio Response time Overvoltage protection (ANSI 59) (single phase) 30 to 180 V 0 to 32 s Approx. 0.98 Approx. 50 ms Undervoltage protection (ANSI 27) (single phase, or optionally frequencydependent) Voltage V< Trip delay, reset delay Reset threshold (function of Vf characteristic) Response time Number of steps Frequency f1, f2 Trip delay, reset delay Reset difference Response time Undervoltage blocking V< Reset ratio of the blocking 20 to 140 V 0 to 32 s 2 to 6 V above response value Approx. 50 ms 2 40 to 65 Hz 0 to 32 s 0.1 Hz Approx. 120 ms 40 to 100 V 1.05 Frequency protection (ANSI 81) Active power protection (ANSI 32) (reverse power protection) Active power | P |> (with reference to SN) Trip delay, reset delay Reset ratio Response time 1 to 120 % 0 to 32 s 0.9 or 0.5 % of SN v 190 ms 1 to 120 % 0 to 32 s 0.9 or 0.5 % of SN v 190 ms Reactive power protection (ANSI 32 VAR) (underexcitation protection) Reactive power | Q |> (with reference to SN) Trip delay, reset delay Reset ratio Response time Siemens LSA 2.5.3 . February 1997

Permissible tolerance of rated auxiliary voltage Power consumption

Generator Protection

7UM512 Generator protection relay (Version V3)

Technical data (continued)
Setting ranges (continued) Unbalancedload protection (ANSI 46) Alarm stage I2> (with reference to IN) Delay of warning Thermal time constant Thermal alarm stage (with reference to the tripping overtemperature) Tripping stage I2>> (with reference to IN) Reset ratio Trip delay, reset delay Response time of the independent characteristic 3 to 30 % 0 to 32 s 100 to 2 500 s 70 to 99 % 10 to 80 % 0.95 0 to 32 s v60 ms Stator earth-fault protection (ANSI 64) Displacement voltage Vearth> Current Iearth> Angle of the directional straight line Reset ratio Vearth / Iearth Trip delay, reset delay Response time 5 to 120 V 2 to 100 mA 0 to 360 0.7/0.95 0 to 32 s v60 ms 3 to 30 kW 1 to 5 kW 1.25 0 to 32 s v80 ms 0.15 to 3 mF 4 0 to 32 s 0 to 32 s <15 ms Rotor earth-fault protection (ANSI 64R) Alarm stage RAlarm< Tripping stage RTRIP< Reset ratio Trip delay, reset delay Response time Permissible rotor-earth capacitance Number Trip delay t1, t2, t3, t4 Reset delay t1, t2, t3, t4 Response time Response time Current Voltage Power Times Direct coupling Switchover of the rotating field direction Response tolerances under nominal conditions 200 ms (requirements: I < 0.1 x IN and V < 0.1 x VN) 3 % of the setting value 3 % of the setting value 0.3 % of SN or 3 % of the setting value 10 ms Operational measured values Voltage Current Power Power factor Phase angle Unbalanced load DC voltage Frequency Reverse current Overtemperature

VPH1 PH2, V0 IPH1, IPH2, IPH3, Ipos., I0 P/SN, Q/SN cos F F I2 I2TH V= f

Fault data acquisition Contacts

Either instantaneous values (12 values per cycle) Or calculated values (one value per cycle) Potential-free trip contacts Switching capacity

vPH1, vPH2, vPH3, iPH1, iPH2, iPH3, VErr Vpos., Ipos., IPH1, IPH2, IPH3, IE, cos F, f fN
3 x 2 NO, 2 x 1 NO (total of 5 trip relays) 1000 W/VA 30 W/VA 5A 30 A 250 V DC 13 20 W/VA 1A 250 V DC 16 8 approx. 2.5 mA

Permissible current Switching voltage Alarm contacts Switching capacity Permissible current Switching voltage

make break continuous 0.5 s

make/break

Displays Inputs

LED displays on the front of the unit Optocoupler, for 24 to 250 V DC Current consumption independent of voltage For panel surface mounting Weight approx. For panel flush mounting, cubicle mounting Weight approx. Degree of protection acc. to EN 60 529

Construction

in housing 7XP20 401 12 kg in housing 7XP20 402 10.5 kg IP 51

Siemens LSA 2.5.3 . February 1997

Generator Protection

7UM512 Generator protection relay (Version V3)

Technical data (continued)
Serial interfaces Operating interface On the front, not isolated, suitable for connection to serial interface of a personal computer, 25-pole socket Isolated, suitable for coupling to central equipment Siemens-specific or acc. to VDEW/ZVEI recommendation Hamming distance d = 4 4800, 9600 or 19200 Bd Asynchronous Similar to V.24/V.28 to CCITT or RS232C to EIA, 2 kV isolation Up to 1000 m Two integrated FSMA plug connectors for FO connection 820 nm Max. 8 dB for glass-fibre 62.5/125 mm Max. 2 km Conformity is proved by tests performed by Siemens AG in line with article 10 of the Council Directives in accordance with the generic standards EN 50081 and EN 50082 for the EMC directive 89/336/EEC and standard 602556 for the low voltage directive.

System interface Protocol Error detection Transfer rate Procedure Connection electrical Distance Connection fibre-optic cable Optical wavelength Permissible line attenuation Distance CEconformity, standards This product is in conformity with the directives of the Council of the European Communities on the approximation of the laws of the Member States relating to the electromagnetic compatibility (EMC Council Directive 89/336/EEC) and concerning electrical equipment for use within specified voltage limits (low voltage directive 73/23/EEC). The product conforms with the international standard IEC 255 and the national standard DIN 57 435 part 303 (corresponding to VDE 0435 part 303). The relay is designed for use in an industrial environment, for installation in standard relay rooms and compartments so that with proper installation electromagnetic compatibility (EMC) is ensured. Voltage test (routine test) all circuits except the auxiliary voltage Voltage test (routine test), for auxiliary voltage only Impulse voltage test (type test), all circuits, class III

Insulation tests IEC 255-5, VDE 0435 Part 303

2 kV (rms value), 50 Hz DC 2.8 kV 5 kV (peak value), 1.2/50 ms, 0.5 J, 3 positive and 3 negative impulses at intervals of 5 s 2.5 kV (peak), 1 MHz, t = 15 ms, 400 shots/s, duration 2 s 4 / 6 kV contact discharge, 8 kV air discharge, both polarities, 150 pF, Rl = 330 W 10 V/m, 27 to 500 MHz 10 V/m, 80 to 1 000 MHz, AM 80 %, 1 kHz, 10 V/m, 900 MHz, repetition frequency 200 Hz, duty cycle 50 % 2 kV, 5/50 ns, 5 kHz, burst length = 15 ms, repetition rate 300 ms, both polarities, Rl = 50 W, duration 1 min 10 V, 150 kHz to 80 MHz, AM 80 %, 1 kHz

EMCtests; immunity (type test) Standards: IEC 2556, IEC 25522 (international product standard) EN 500822 (generic standard) VDE 0435 part 303 (German product standard)

High frequency test with 1 MHz interference IEC 255221, class III and VDE 0435 part 303, class III Electrostatic discharge IEC 255222, class III and IEC 100042, class III Radiofrequency electromagnetic field, nonmodulated report IEC 255223, class III Radiofrequency electromagnetic field, amplitude modulated IEC 100043, class III Radiofrequency electromagnetic field, puls modulated ENV 50204, class III Fast transients IEC 255224 class III, IEC 100044 class III Conducted disturbances induced by radiofrequency fields, amplitude modulated IEC 100046, class III Power frequency magnetic field IEC 100048, class IV IEC 2556

30 A /m, continuous, 300 A /m for 3 s, 50 Hz 0.5 mT; 50 Hz 150 kHz to 30 MHz, group 1 class A 30 to 1 000 MHz, group 1 class A 5_ to + 55_C 20_ to + 70_C 25_ to + 55_C 25_ to + 70_C Annual average v75 % relative humidity; on 30 days/year up to 95 % relative humidity; condensation not permissible 10 Hz to 60 Hz: 0.035 mm amplitude 60 Hz to 500 Hz: 0.5 g acceleration 5 Hz to 8 Hz: 7.5 mm amplitude 8 Hz to 500 Hz: 2 g acceleration

EMCtests; emission (type test) Standard: EN 500812 (European generic standard for use in industrial environment) Climatic conditions

Conducted interference voltage, auxiliary voltage CISPR 11, EN 55011 and VDE 0875 part 11 Interference field strength CISPR 11, EN 55011 and VDE 0875 part 11 Permissible ambient temperature during service limit operating temperature during storage during transport

Humidity class

Mechanical stress tests IEC 255211, IEC 682

Permissible mechanical stress

during service during transport

Siemens LSA 2.5.3 . February 1997

Generator Protection

7UM512 Generator protection relay (Version V3)

Selection and ordering data
7UM512 Generator protection relay (version V3) Rated current at 50 to 60 Hz, 100 to 125 V AC 1A 5A Rated auxiliary voltage 24 V, 48 V DC 60 V, 110 V, 125 V DC 220 V, 250 V DC Construction for panel flush mounting or cubicle mounting for panel surface mounting for panel flush mounting or cubicle mounting without glass cover Rear serial interface (suitable for station control and DIGSI operating program) electrical optical Order No. 7UM512 j j j B 0 1 0 j B 0 1 5 2 4 5 C D E B C

Accessories Rotor earth-fault protection Series transformer 100/45 V AC Coupling device 2 x 4 mF Series resistor Stator earth-fault protection Voltage divider 500/100 V DC voltage protection Voltage divider 1 : 20 and 1 : 10 (W x H x D in mm) 135 x 170 x 85 196 x 300 x 110 196 x 300 x 146 196 x 300 x 146 196 x 300 x 110 7XR85000 7XR6000 3PP13360DZ013002 3PP13361CZ0113001 3PP13260BZ012009

Operation software DIGSI program (suitable for all protection relays 7UM..., 7UT..., 7SJ..., 7SA..., ...) German English Test version: German English Connecting cables for protection relays (25-pin) PC (9-pin); (other variations supplied on request) 7XS50200AA00 7XS50201AA00 7XS50210AA00 7XS50211AA00 7XV51002

Documentation German Katalogblatt LSA 2.5.3: Handbuch: English Catalog LSA 2.5.3: Manual: Maschinenschutz 7UM512 (Version V3) Maschinenschutz 7UM512 (Version V3) 7UM512 Generator protection (Version V3) 7UM512 Generator protection (Version V3) E50001K5752A131A2 C53000G1100C1101 E50001K5752A131A27600 C53000G1176C1101

Siemens LSA 2.5.3 . February 1997

Network Version for panel flush mounting/cubicle mounting

Version for panel surface mounting

V L1
9 13 2B1 10 3B2 Alarm relay 1 Over/undercurrent trip I > < Stator earthfault trip V E > Rotor earthfault trip R E > Rotor earthfault warning Under / Overvoltage trip External command trip DC voltage V > < Unbalanced load ( I2 >; I2TH ) Unblanced load alarm stage Alarm relay 2 7UM512 Alarm relay 3 Alarm relay 4 Alarm relay 5 Alarm relay 6 Alarm relay 7 Binary input 1 Alarm relay 9 Alarm relay 10 Alarm relay 11 Alarm relay 12 Unit malfunction alarm Binary input 2 Binary input 3 Binary input 4 Binary input 5 Binary input 6 Trip relay 1 Binary input 7 Binary input 8 Trip relay 2 Alarm relay 8 Overcurrent trip I > 3B1

L1 L2 L3

V L2 V RE VE
I L1 I L2 I L3 N a LED reset Block I > < Block V > < L+ Unbalanced load block Direct coupling Coupling I > < 1 Coupling I > < 2 Block f > < k i IE 81 7D1 82 7D4 79 8D3 80 7D2 62 8D1 78 8D4 L 6A3 19 6A1 18 6A2 17 58 7A1 59 7A4 7A3 61 8D2 54 55 56 57 8A1 8A4 8A3 7A2 b I RE 28 1C2 53 8A2 7 1A2 27 1C1

Siemens LSA 2.5.3 . February 1997 14 11 31 1 2B2 3B3 2B3 3A1 5 2 6 3 3A2 2A1 2A2 1A1

RL

100 V ~

45 V ~

7UM512 Generator protection relay (Version V3)

f 1 < TRIP; f 2 >TRIP

Rotor earthfault protection inoperative L+(M2)

Exitation system

7B1 8B1 6B1 7B2 8B2 6B2 7B3 8B3 6B3 7B4 8B4 6B4 3D1 4D1 3D2 4D2 3D3 4D3 3D4 4D4 3C1 4C1 3C2 4C2 3C3 4C3 3C4 4C4

65 64 63 68 67 66 71 70 69 86 85 84 87 88 89 90 91 92 93 94 95 96 43 44 45 46 47 48

L+(M1) Internal failure L+ Trip command 1 L L+ Trip command 2 L L+

I load

I L1

isec load

I L2

Fig. 6 Connection diagram for the 7UM512 generator protection relay (Version V2), from state of development EE 83 4 8 37 7D3 1D1 1D2 2C1 Trip relay 3 Trip command 3

I L3

Binary inputs 1 to 8, alarm relays, trip relays and LEDs are marshallable

V = > < 38 2C2 15 4B1 L+

Power supply 51 4A1 RxD MR 52 4A2 16 4B2 L

Trip relay 4

V.24 interface, 2-kV isolated coupling to control unit Fibreoptic interface coupling to control unit

5B1 5B3 5B4 5B2 5A1 5A3 5A4 5A2 6D1 6D3 6D4 6D2 5D1 5D2 5D3 5D4 4A3 4A4

74 99 100 75 72 97 98 73 20 22 23 21 24 25 49 50 76 77

L L+ Trip command 4 L+ Trip command 5 TxD MT Optional fibreoptic or V.24 serial interface

Generator Protection

26

Generator Protection

Dimension drawings in mm

220

30

172

29.5

7.3 13.2

206.5 180 5.4 Diam. 5 or M4 255.8 Diam. 6 221 Panel cutout 266 Fibreoptic interface Detail Z: Siemens LSA 2.5.3 . February 1997

244

266

Fibreoptic interface 10

1.5

225

231.5

Front view

Side view

Fig. 7 7XP20402 housing (for panel flush mounting and cubicle mounting) 234 7.5
51 76

27

29.5

..... .....

75

100

Cutout 20 x 60 (without paint)

280

344

40

39

1.5

1 26

..... ..... 219 Front view

25 50

71 260 Side view

Fig. 8 7XP20401 housing (for panel surface mounting)

10

245

Generator Protection

Conditions of Sale and Delivery S Export Regulations S Trademarks S Dimensions

Conditions of Sale and Delivery Subject to the General Conditions of Supply and Delivery for Products and Services of the Electrical and Electronic Industry and to any other conditions agreed upon with the recipients of catalogs.

The technical data, dimensions and weights are subject to change unless otherwise stated on the individual pages of this catalog. The illustrations are for reference only.

We reserve the right to adjust the prices and shall charge the price applying on the date of delivery.

A 9.91 a

Export Regulations In accordance with present provisions of the German Export List and the US Commercial Control List, export licences are not required for the products listed in this catalog.

An export licence may however be required due to countryspecific application of the products.

Relevant are the criteria stated in the delivery note and the invoice. Subject to change without notice.

Trademarks All product designations used are trademarks or product names of Siemens AG or of other suppliers.

Dimensions All dimensions in this catalog are given in mm.

Siemens online! The Power Transmission and Distribution Group can also be found in the Internet: http://www.ev.siemens.de

Responsible for Technical contents: Dr. HansJoachim Hermann, Siemens AG, EV S V13, Nrnberg General editing: Roland Reichel/Claudia KhnSutiono, Siemens AG, EV S SUP22, Nrnberg/EV BK T, Erlangen
Siemens LSA 2.5.3 . February 1997

11

Generator Protection

Bereich Energiebertragung und -verteilung Geschftsgebiet Sekundrsysteme P. O. Box 48 06 D-90026 Nrnberg 12 Siemens Aktiengesellschaft

Power Transmission and Distribution

Order No.:Siemens E50001-K5752A131-A27600 LSA 2.5.3 . February 1997 Printed in Germany KG K 0297 2.0 SD 12 En 321515 6101/U527