7Um62

11 Generator Protection / 7UM62

SIPROTEC 4 7UM62 Multifunction Generator, Motor and Transformer Protection Relay
Function overview

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 protectionduring 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 Monitoring function • Trip circuit supervision • Fuse failure monitor • Operational measured values V,I, f, … • Energy metering values Wp, Wq • Time metering of operating hours • Self-supervision of relay • 8 oscillographic fault records Communication interfaces • System interface – IEC 61850 protocol – IEC 60870-5-103 protocol – PROFIBUS-DP – MODBUS RTU – DNP 3.0 Hardware • Analog inputs • 8 current transformers • 4 voltage transformers • 7/15 binary inputs • 12/20 output relays Front design •User-friendly local operation • 7/14 LEDs for local alarm • Function keys • Graphic display with 7UM623
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Fig. 11/34 SIPROTEC 4 7UM62 multifunction protection relay for generators, motors and transformers

Description The SIPROTEC 4 7UM62 protection relays can do more than just protect. They also offer numerous additional functions. Be it earth faults, short-circuits, overloads,overvoltage, overfrequency or underfrequency asynchronous conditions, protection relays assure continued operation of power stations. The SIPROTEC 4 7UM62 protection relay is a compact unit which has been specially developed and designed for the protection of small, medium-sized and large generators. They integrate all the necessary protection functions and are particularly suited for the protection of: −Hydro and pumped-storage generators − Co-generation stations − Private power stations using regenerative energy sources such as wind or biogases − Diesel generator stations − Gas-turbine power stations − Industrial power stations − Conventional steam power stations. The SIPROTEC 4 7UM62 includes all necessary protection functions for large synchronous and asynchronous motors and for transformers.The integrated programmable logic functions (continuous function chart CFC) offer the user high flexibility so that

adjustments can easily be made to the varying power station requirements on the basis of special system conditions. The flexible communication interfaces are open for modern communication architectures with the control system. The following basic functions are available for allversions: Current differential protection for generators, motors and transformers, stator earth-fault protection, sensitive earth-fault protection, stator overload protection, overcurrent- time protection (either definite time or inverse time), definite-time overcurrent protection with directionality, undervoltage and overvoltage protection, underfrequency and overfrequency protection, overexcitationand underexcitation protection, external trip coupling, forward-power and reversepower protection, negative-sequence protection, breaker failure protection, rotor earth-faults protection (fn, R-measuring), motor starting time supervision and restart inhibit for motors.

LSP2171-afpen.eps

11

Siemens SIP · 2008

11 Generator Protection / 7UM62

Application The 7UM6 protection relays ofthe SIPROTEC 4 family are compact multifunction units which have been developed for small to medium-sized power generation plants. They incorporate all the necessary protective functions and are especially suitable for the protection of:

Generator Basic One application concentrates on small and medium generators for which differential protection is required. The function mix is also suitable...