SIPROTEC Compact 7SK80 Motor Protection Relay with Local Control
The SIPROTEC Compact 7SK80 is a multifunctional motor protection relay. It is
designed for asynchronous induction type motors of all sizes. The relays have
all the functionality to be applied as a backup relay to a transformer differential
relay. The SIPROTEC Compact 7SK80 offers highest reliability at major functionality
by the synergy of reliable algorithms with newly developed hardware. The reliability
is proven by the experience in the field of almost 1,000,000 SIPROTEC devices.
The relay provides numerous functions to respond flexibly to the system requirements
and to deploy the invested capital economically. Examples for this are: exchangeable interfaces, flexible protection
functions and the integrated automation level (CFC).
Highlights
• Removable current and voltage terminal blocks
• Binary input thresholds settable using DIGSI (3 stages)
• Current taps (1A/5A) settable using DIGSI
• 9 programmable function keys
• 6-line display
• Buffer battery exchangeable from the front
• USB front port
• 2 additional communication ports
• IEC 61850 with integrated redundancy (electrical or optical)
• Relay-to-relay communication through Ethernet with IEC 61850 GOOSE
• Millisecond-accurate time synchronization through Ethernet with SNTP
Protection functions
• Time-overcurrent protection (50, 50N, 51, 51N)
• Directional overcurrent protection, ground (67N)
• Sensitive dir./non-dir. ground-fault detection (50Ns, 67Ns)
• Displacement voltage (64)
• Inrush restraint
• Motor protection
– Undercurrent monitoring (37)
– Starting time supervision (48)
– Restart inhibit (66/86)
– Locked rotor (14)
– Load jam protection (51M)
• Overload protection (49)
• Temperature monitoring
• Under-/overvoltage protection (27/59)
• Under-/overfrequency protection (81O/U)
• Breaker failure protection (50BF)
• Phase unbalance or negative-sequence protection (46)
• Phase-sequence monitoring (47)
• Lockout (86)
Control functions/programmable logic
• Commands for the ctrl. of CB, disconnect switches (isolators/isolating switches)
• Control through keyboard, binary inputs, DIGSI 4 or SCADA system
• User-defined logic with CFC (e.g. interl.)
designed for asynchronous induction type motors of all sizes. The relays have
all the functionality to be applied as a backup relay to a transformer differential
relay. The SIPROTEC Compact 7SK80 offers highest reliability at major functionality
by the synergy of reliable algorithms with newly developed hardware. The reliability
is proven by the experience in the field of almost 1,000,000 SIPROTEC devices.
The relay provides numerous functions to respond flexibly to the system requirements
and to deploy the invested capital economically. Examples for this are: exchangeable interfaces, flexible protection
functions and the integrated automation level (CFC).
Highlights
• Removable current and voltage terminal blocks
• Binary input thresholds settable using DIGSI (3 stages)
• Current taps (1A/5A) settable using DIGSI
• 9 programmable function keys
• 6-line display
• Buffer battery exchangeable from the front
• USB front port
• 2 additional communication ports
• IEC 61850 with integrated redundancy (electrical or optical)
• Relay-to-relay communication through Ethernet with IEC 61850 GOOSE
• Millisecond-accurate time synchronization through Ethernet with SNTP
Protection functions
• Time-overcurrent protection (50, 50N, 51, 51N)
• Directional overcurrent protection, ground (67N)
• Sensitive dir./non-dir. ground-fault detection (50Ns, 67Ns)
• Displacement voltage (64)
• Inrush restraint
• Motor protection
– Undercurrent monitoring (37)
– Starting time supervision (48)
– Restart inhibit (66/86)
– Locked rotor (14)
– Load jam protection (51M)
• Overload protection (49)
• Temperature monitoring
• Under-/overvoltage protection (27/59)
• Under-/overfrequency protection (81O/U)
• Breaker failure protection (50BF)
• Phase unbalance or negative-sequence protection (46)
• Phase-sequence monitoring (47)
• Lockout (86)
Control functions/programmable logic
• Commands for the ctrl. of CB, disconnect switches (isolators/isolating switches)
• Control through keyboard, binary inputs, DIGSI 4 or SCADA system
• User-defined logic with CFC (e.g. interl.)
