Siemens 175V - User Manual
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Table of Contents:
- Page 2 – Application; Function diagram
- Page 3 – IEC
- Page 4 – haracteristics acc. to; Reset characteristics
- Page 6 – Function; cos; Settable dropout delay times; Flexible protection functions
- Page 7 – Motor statistics
- Page 9 – CB switching cycle diagram; Currents I; EE; Voltages V
- Page 11 – Communication; System solution/communication
- Page 14 – Type of network
- Page 15 – Technical Data page 1; Technical data
- Page 16 – Technical Data page 2; type tests
- Page 17 – Technical Data page 3; Unit design
- Page 18 – Technical Data page 4
- Page 19 – Technical Data page 5; Voltage protection
- Page 20 – Technical Data page 6
- Page 21 – Technical Data page 7
- Page 22 – Technical Data page 8; for all types of ground faults
- Page 23 – Technical Data page 9
- Page 24 – Technical Data page 10; P > limit value of active power
- Page 25 – Technical Data page 11; Clock
- Page 26 – Selection and ordering data; Description; SK80 motor protection device; Housing, binary inputs and outputs; Rated auxiliary voltage
- Page 27 – SK80 motor protection device; No port
- Page 29 – Sample order; H D; DIGSI 4
- Page 30 – Connection diagram
- Page 34 – is connected directly to the shield cap.
- Page 36 – Dimension drawings in mm / inch
Function overview
Description
Siemens SIP · 2008
12 Motor Protection / 7SK80
12
12
/9
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 PLC logic with CFC
(e.g. interl.)
Monitoring functions
•
Operational measured values V, I, f
•
Energy metering values W
p
, W
q
•
Circuit-breaker wear monitoring
•
Minimum and maximum values
•
Trip circuit supervision
•
Fuse failure monitor
•
8 oscillographic fault records
•
Motor statistics
Communication interfaces
•
System/service interface
– IEC 61850
– IEC 60870-5-103
– PROFIBUS-DP
– DNP 3.0
– MODBUS RTU
•
Ethernet interface for DIGSI 4
•
USB front interface for DIGSI 4
Hardware
•
4 current transformers
•
0/3 voltage transformers
•
3/7 binary inputs (thresholds
configurable using software)
•
5/8 binary outputs (2 changeover/
Form C contacts)
•
0/5 RTD inputs
•
1 live-status contact
•
Pluggable current and voltage terminals
SIPROTEC Compact 7SK80
Motor Protection Relay
The SIPROTEC Compact 7SK80 is a multi-
functional motor protection relay. It is de-
signed 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 7SK80 features “flexible protection
functions”. 20 additional protection func-
tions can be created by the user. For exam-
ple, a rate of change of frequency function
or a reverse power function can be created.
The relay provides circuit-breaker control,
additional primary switching devices
(grounding switches, transfer switches and
isolating switches) can also be controlled
from the relay. Automation or PLC logic
functionality is also implemented in the
relay. The integrated programmable logic
(CFC) allows the user to add own func-
tions, e.g. for the automation of switch-
gear (including: low voltage starting, auto-
matic restart, interlocking, transfer and
load shedding schemes). The user is also
allowed to generate user-defined messages.
The communication module is independ-
ent from the protection. It can easily be
exchanged or upgraded to future commu-
nication protocols.
Fig. 12/6
SIPROTEC 7SK80
motor protection relay
LS
P
2
874.t
if
Highlights
Removable current and voltage terminals
provide the ideal solution for fast and
secure replacement of relays.
Binary input thresholds and current taps
are software settings. There is thus no need
to ever open the relay to adapt the hardware
configuration to a specific application.
The relay provides 9 programmable func-
tion keys that can be used to replace push-
buttons, select switches and control switches.
The battery for event and fault recording
memory can be exchanged from the front
of the relay.
The relay is available with IEC 61850 for
incredible cost savings in applications (e.g.
transfer schemes with synch-check, bus
interlocking and load shedding schemes).
This compact relay provides protection,
control, metering and PLC logic functional-
ity. Secure and easy to use one page matrix
IO programming is now a standard feature.
The housing creates a sealed dust proof
environment for the relay internal elec-
tronics. Heat build up is dissipated through
the surface area of the steel enclosure. No
dusty or corrosive air can be circulated
over the electronic components. The relay
thus will maintain its tested insulation
characteristic standards per IEC, IEEE,
even if deployed in harsh environment.
Revised Oct. 2008
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Summary
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-...
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 ...
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...
