Page 2 - Application; Function diagram
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /10 Application Fig. 12/7 Function diagram The SIPROTEC Compact 7SK80 unit is anumerical protection relay that can performcontrol and monitoring functions andtherefore provide the user with a cost-effec-tive platform for asset protection, monitor-...
Page 3 - IEC
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /11 Application ANSI No. IEC Protection functions 50, 50N I>, I>>, I>>>, I E >, I E >>, I E >>> Instantaneous and definite time-overcurrent protection (phase/neutral) 51, 51N I p , I Ep Inverse time-overcurrent ...
Page 4 - haracteristics acc. to; Reset characteristics
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /12 Protection functions Available inverse-time characteristics C haracteristics acc. to ANSI/IEEE IEC 60255-3 Inverse • • Short inverse • Long inverse • • Moderately inverse • Very inverse • • Extremely inverse • • Time-overcurrent protection(ANS...
Page 6 - Function; cos; Settable dropout delay times; Flexible protection functions
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /14 Protection functions Flexible protection functions The 7SK80 enables the user to easily addup to 20 additional protective functions.Parameter definitions are used to linkstandard protection logic with any chosencharacteristic quantity (measure...
Page 7 - Motor statistics
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /15 Protection functions Fig. 12/11 n Motor protection Restart inhibit (ANSI 66/86) If a motor is subjected to many successivestarts, the rotor windings or rotor bars canbe heated up to a point were the electricalconnections between the rotor bars...
Page 9 - CB switching cycle diagram; Currents I; EE; Voltages V
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /17 Chatter disable The chatter disable feature evaluateswhether, in a set period of time, the num-ber of status changes of indication inputexceeds a specified number. If exceeded,the indication input is blocked for a certainperiod, so that the ev...
Page 11 - Communication; System solution/communication
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /19 DNP 3.0 protocol Power utilities use the serial DNP 3.0 (Dis-tributed Network Protocol) for the stationand network control levels. SIPROTECunits function as DNP slaves, supplyingtheir information to a master system orreceiving information from...
Page 14 - Type of network
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /22 Typical applications Overview of connection types Type of network Function Current connection Voltage connection (Low-resistance) grounded network Time-overcurrent protectionphase/ground non-directional Residual circuit, with 3 phase-currenttr...
Page 15 - Technical Data page 1; Technical data
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 1 Technical data General unit data Analog current inputs Rated frequency f N 50 or 60 Hz (adjustable) Rated current I nom 1 or 5 A Ground current, sensitive I Ns w 1.6 · I nom linear range 1) Burden per phase and ground path at I ...
Page 16 - Technical Data page 2; type tests
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 2 Technical data Insulation tests (cont'd) Impulse voltage test (type test) All process circuits (except commu-nication interfaces) against eachother and against the productiveconductor terminal class III 5 kV (peak value); 1.2/50...
Page 17 - Technical Data page 3; Unit design
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 3 Technical data Unit design (cont'd) Degree of protectionacc. to EN 60529 For equipment in thesurface-mounting housing For equipment in theflush-mounting housing For operator protection Degree of pollution, IEC 60255-27 IP 50 Fro...
Page 18 - Technical Data page 4
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 4 Technical data System interface (cont'd) Transmission rate Up to 19200 baud Bridgeable distance Max. 1 km/3300 ft Fiber optic Connection fiber-optic cable ST connector transmitter/receiver Terminal At the bottom part of the hous...
Page 19 - Technical Data page 5; Voltage protection
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 5 Technical data Cold-load pickup/dynamic setting change Controllable functions Time-overcurrent protection(separated acc. to phases and ground) Initiation criteria Current criterion “BkrClosed/MIN”CB position via aux. contacts,bi...
Page 20 - Technical Data page 6
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 6 Technical data Negative-sequence protection (ANSI 46) Definite-time characteristic (ANSI 46-1 and 46-2) Setting ranges Unbalanced load tripping element46-1, 46-2 (I 2 >, I 2 >>) Delay times 46-1, 46-2 (T I2 >, T I2 &...
Page 21 - Technical Data page 7
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 7 Technical data Restart inhibit for motors (ANSI 66) Setting ranges Motor starting current relativeto rated motor currentI MOTOR START /I Motor Nom Rated motor current I Motor Nom Max. permissible starting timeT Start Max. Equili...
Page 22 - Technical Data page 8; for all types of ground faults
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 8 Technical data (Sensitive) ground-fault protection (ANSI 64, 50Ns, 51Ns, 67Ns) (cont'd) Ground-fault pickup for all types of ground faults Definite-time characteristic (ANSI 50Ns) Setting ranges Pickup current 50Ns-2 Pickup,50Ns...
Page 23 - Technical Data page 9
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 9 Technical data Flexible protection functions (e.g. ANSI 27, 32, 37, 47, 50, 55, 59, 81R) (cont'd) Times Pickup timesCurrent, voltage(phase quantities) With 2 times the setting valueWith 10 times the setting value Current, voltag...
Page 24 - Technical Data page 10; P > limit value of active power
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 10 Technical data Long-term averages Time window 5, 15, 30 or 60 minutes Frequency of updates Adjustable Long-term averages of currents of active powerof reactive powerof apparent power I Admd , I Bdmd , I Cdmd (I L1dmd , I L2dmd ...
Page 25 - Technical Data page 11; Clock
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 Technical Data page 11 Technical data Clock Time synchronization Binary input,communication Setting group switchover of the function parameters Number of available setting groupsSwitchover performed 4 (parameter group A, B, C and D)Via keypad, DIGSI ...
Page 26 - Selection and ordering data; Description; SK80 motor protection device; Housing, binary inputs and outputs; Rated auxiliary voltage
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /23 Selection and ordering data Description Order No. 7SK80 motor protection device 7SK80 oo – ooooo – oooo Housing, binary inputs and outputs Housing 1/6 19’’, 4 x I, 3 BI, 5 BO (2 changeover/Form C),1 live status contact 1 Housing 1/6 19’’, 4 x ...
Page 27 - SK80 motor protection device; No port
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /24 seefollowingpage Selection and ordering data Description Order No. Ordercode 7 SK80 motor protection device 7SK80 oo – ooooo – o H oo L 0 o Port B (at bottom of device, rear) No port 0 IEC 60870-5-103 or DIGSI 4/modem, electrical RS232 1 IEC 6...
Page 29 - Sample order; H D; DIGSI 4
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /26 Sample order Position Order No. + Order code 7 S K 8 0 5 1 - 5 E C 9 6 - 3 H D 0 + L 0 G 6 I/O’s: 3 BI/5 BO, 1 live status contact, 5 RTD inputs 5 7 Current transformer: I ph = 1 A / 5 A, I e = 1 A / 5 A 1 8 Power supply: 60 to 250 V DC, 115 V...
Page 30 - Connection diagram
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /27 Connection diagram Fig. 12/24 7SK801 connection diagram
Page 34 - is connected directly to the shield cap.
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /31 Connection diagram Fig. 12/28 7SK805 connection diagram *) The shielding of the connecting cable is connected directly to the shield cap.
Page 36 - Dimension drawings in mm / inch
Siemens SIP · 2008 12 Motor Protection / 7SK80 12 12 /33 Dimension drawings in mm / inch Front view Side view Rear view Fig. 17/22 7SJ80/7SK80 protection unitfor panel flush mounting/cubicle mounting Side view Fig. 17/23 7SJ80/7SK80 protection unitfor panel-surface mounting Panel cutout Front view