SDR distribution reclosers and controllers

Type SDR three-phase recloser

15-38 kV
  • Rated short-time withstand current up to 16 kA

  • Rated continuous current up to 800 A

  • Lightning impulse (BIL) up to 170 kV

SDR distribution reclosers

Combining the latest technology in vacuum switching and electronic control, the type SDR distribution recloser is based on decades of experience in circuit breaker design. Customizable control platforms based on either the Siemens or SEL recloser relays contribute to the best operational fit possible.

Application:

Advanced feeder protection and FLISR schemes.

 

Features include:

  • Single-phase, three-phase, and triple-single operation 
  • Vacuum interruption 
  • Stainless steel tank 
  • Hydrophobic, cycloaliphaticepoxy poles 
  • Mechanical trip and lockout.

Options:

  • Siemens or SEL protective relays 
  • Customized cubicles.

Technical data and ratings:

  • Voltage ratings of 15 kV, 27 kV, or 38 kV
  • Rated short-time withstand currents of 12.5 kA or 16 kA
  • Rated continuous currents of 630 A or 800 A
  • Lightning impulses (BIL) of 110 kV, 150 kV, or 170 kV
  • Recloser sequence of O - T - CO - T - CO - T - CO - lockout T (dead time) individually settable
  • Opening time of 30 ms
  • Closing time of 60 ms
  • 10,000 switching cycles
  • Up to 200 short-circuit operations; 116 according to ANSI/IEEE C37.60 duty cycle.
1 Three-phase only
Rated voltage (kV)
Interrupting current (kA) (sym)
Lightning impulse– withstand voltage (kV)
Continuous current
15.5
12.5
110
630 A; 800 A
15.5
16
110
630 A; 800 A
27
12.5
125
630 A; 800 A
27
12.5
150
630 A; 800 A1
27
16
150
630 A; 800 A1
38
12.5
170
630 A; 800 A1
38
16
170
630 A; 800 A1
Dead time
Unit
Time range
Rated maximum voltage Ur
kV
15.5
27.0
27.0
38.0
Rated lightning impulse-withstand voltage Up
kV
110
125
150
170
Dead time after first open
s
0.2 to 14,400
0.2 to 14,400
0.2 to 14,400
0.2 to 14,400
Dead time after second and third open
s
2 to 14,400
2 to 14,400
3 to 14,400
3 to 14,400
Dead time after fourth open
s
30 to 14,400
30 to 14,400
30 to 14,400
30 to 14,400

Three-phase recloser:

  • Dimensions: 46.2 (1,173) x 20.5 (521) x 37.9 (962)
  • Weight in lbs (kg): 309 (139)

SDR distribution recloser controllers

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 (up to 49 preset curves and multiple user-configurable curves), it is equipped for ground fault and sensitive ground-fault detection. Inrush restraint and load shedding are further protection functions that help prevent nuisance outages.

Convenience:

  • Fully withdrawable type 7SR control and protection relay 
  • Ease of maintenance
  • Complete system monitoring
  • Tri-color programmable LEDs
  • USB port (front of controller)
  • 48-hour battery UPS
  • Loop automation
  • Integrated current transformers (CTs) and optional resistive voltage sensors in recloser switch unit
  • Single-phase, three-phase and triple-single reclosers available
  • Fully programmable from front panel
  • Customizable and intuitive Human Machine Interface (HMI) with programmable buttons, indicators and logic
  • Optional docking station for remote programming.

Operation:

  • Relay protection
  • Local/remote control
  • Monitoring/SCADA of various protocols
  • Power metering
  • Event log
  • Multiple communication protocols
  • Input and output logic bits.
Protection functions
Description
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 ground fault/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
-----
User-programmable logic via HMI
-----
Eight settings groups with two levels of password access (four on single-phase model)
-----

Self-monitoring

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 
  • I 2t 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.

 

Supported protocols
Communication interfaces
IEC 60870-5-103
 Front USB port
Modbus RTU 
Rear RS485 port 
DNP 3.0  
Rear RS485 port 
IEC 60870-5-101 (optional with Ethernet port)
Rear RS485 port 
IEC 61850 (optional with Ethernet port)
Rear RS485 port 

Additional data communication ports (optional) (three-phase and triple-single models only):

  • Two rear standard fiber-optic ports and IRIG-B port 
  • Additional rear RS232 port and IRIG-B port 
  • Additional rear RS485 port and IRIG-B port 
  • Additional rear electrical Ethernet port RJ45 (quantity of two)
  • Additional rear optical Ethernet duplex (quantity of two).

Optional functions (three-phase and triple-single models only):

  • Triple-single - fault locator
  • 25 synchronism check - triple-single/single-phase auto-reclose

Loop automation by loss of voltage uses an additional set of resistive voltage sensors and has the added functions:

  • 27/59 - second under/ overvoltage
  • 60VTS - second VT supervision

The SDR controller is available with optional SEL® control relays for use with type SDR reclosers.

 

The type SEL-351R option utilizes the relay outputs to signal the type SDR controller 48 Vdc switch unit driver (PCB2) electronics and capacitors (PCB3) to control the three-phase type SDR recloser. The four 12 Vdc batteries are charged and monitored by the uninterruptible power supply (UPS) charge controller. Two additional 12 Vdc batteries provide the 24 Vdc control power for the type SEL-351R relay.

 

Both the SEL-351RS Kestrel and SEL-651R options are equipped with internal power supply modules. These modules utilize their own internal electronics and capacitors which directly control the type SDR recloser operation. Two 12 Vdc batteries provide the control power for each of these options.

 

All SDR controllers are available with customized accessories and device-mounting provisions upon request. 

 

Type SEL-351R:

  • Three-phase trip and reclose operation
  • Vertical relay orientation
  • One or four secondary voltage inputs 300 Vac maximum
  • Painted ANSI 61 steel control enclosure standard, 304 brushed stainless steel optional
  • Three-point latch standard
  • Ground fault circuit interrupter (GFCI) duplex outlet provided for laptop power.

Type SEL-651R:

  • Three-phase or triple-single trip and reclose operation
  • Vertical relay orientation standard; horizontal relay orientation optional
  • Available secondary voltage input options:

- Six 300 Vac maximum

- Three 1M Lindsey SVMI LEA and three Siemens type SDR recloser LEA

- Three 300 Vac maximum and three Siemens type SDR recloser LEA

- Three 300 Vac maximum and three 1M Lindsey SVMI LEA.

  • Painted ANSI 61 steel control enclosure standard, 304 brushed stainless steel optional
  • Three-point latch standard
  • GFCI duplex outlet provided for laptop power.

Type SEL-351RS Kestrel:

  • Single-phase trip and reclose operation
  • Vertical relay orientation
  • Secondary voltage input 300 Vac maximum
  • Painted ANSI 61 steel control enclosure standard, 304 brushed stainless steel optional
  • Three-point latch standard
  • GFCI duplex outlet provided for laptop power.

Mailing address

Siemens Industry, Inc.

99 Bolton Sullivan Drive

Heber Springs, Arkansas 72543

United States