Siemens distribution recloser (SDR) controller
SDR distribution recloser controller description and features
The SDR controller constitutes the brains of the recloser. It comprises indicators and control elements, communication interfaces and a USB port for convenient connection of a laptop computer. Access to the user level menus and data is protected by multi-level password authentication.
Along with overcurrent time protection (49 preset curves and multiple userconfigurable curves), it is equipped for ground fault and sensitive ground fault detection. Inrush restraint and loadshedding are further protection functions that help prevent nuisance outages.
Operation
Relay protection
Local / remote control
Monitoring / SCADA of various protocols
Power metering
Event log
Multiple communication protocols
Input and output logic bits
Convenience
Fully withdrawable 7SR controller
Ease of maintenance
Complete system monitoring
Tri-color programmable LEDs
USB port (front of controller)
48-hour battery UPS
Loop automation
Fully programmable from front panel
Customizable and intuitive Human Machine Interface (HMI) with programmable buttons, indicators and logic
Optional docking station for remote programming
SDR distribution recloser controller protection, measuring and optional functions
Protection functions
27/59 | Under / overvoltage |
37 | Undercurrent |
46BC | Broken conductor / load unbalance |
46NPS | Negative phase sequence overcurrent |
47 | Negative phase sequence (NPS) voltage |
49 | Thermal overload |
50 | Instantaneous overcurrent |
50BF | Circuit breaker failure |
50G/N | Instantaneous ground fault |
51 | Time-delayed overcurrent |
51c | Cold load pickup |
51G/N | Time-delayed measured groundfault / SEF |
51V | Voltage controlled overcurrent |
59N | Neutral voltage displacement |
60CTS | CT supervision |
60VTS | VT supervision |
64H | High impedence REF (restricted earth fault) |
67/50 | Bi-directional instantaneous overcurrent |
67/50/G/N | Bi-directional instantaneous ground fault |
67/51 | Bi-directional time-delayed overcurrent |
67/51G/N | Bi-directional time-delayed ground fault |
67/51SEF | Directional time-delayed sensitive ground fault |
74TC | Trip circuit supervision |
79 | Auto reclose |
81HBL2 | 2nd harmonic block / inrush restraint |
81 | Under / overfrequency |
86 | Lockout |
Measuring functions
Primary current phase and ground
Secondary current phase and ground
Positive phase sequence (PPS) current
Negative phase sequence (NPS) current
Zero phase sequence (ZPS) current
Binary input / output status
Trip circuit healthy / failure
Time and date
Fault records
Event records
Frequency
Waveform records
Recloser trip counter
I2t summation for contact wear
Direction
Primary line and phase voltage
Secondary voltage
Apparent power and power factor
Real and reactive power
W Hr forward and reverse
VAr Hr forward and reverse
Historical demand record
Positive phase sequence (PPS) voltage
Negative phase sequence (NPS) voltage
Zero phase sequence (ZPS) voltage
SDR distribution recloser controller supported protocols, communication interfaces and data communication options
Supported protocols
IEC 60870-5-103
Modbus RTU
DNP 3.0
Communication interfaces
Front USB port
Rear RS485 port
Data communication options
SDR distribution recloser controller dimensions
Rated voltage Ur | 15 kV and 27.6 kV |
Dimensions: length x width x height (without pole mount brackets) in inches (mm) | 18.0 (457) x 14.0 (356) x 36.0 (914) |
Weight (without batteries) lbs (kg) | 150 (67) |