CapSwitcher®

A Revolutionary Solution for a Changing Industry

Southern States CapSwitcher® is the first high voltage capacitor switching device specifically designed to meet the power quality needs of today's electrical systems. This special purpose SF6 capacitor switch is available for application on single bank or back-to-back banks whether grounded or ungrounded. Its closing resistors provide transient suppression to minimize the detrimental effects of voltage transients on sensitive equipment such as computers, CNC machines, and variable speed drives and to minimize the detrimental effects of current transients on utility equipment such as circuit breaker contacts, power transformer cores and coils, etc. Other key features of this device include circuit making in SF6 rather than in air, single mechanism spring operator for reliable long-life operation, and single gap per phase puffer interrupters having long contact life and multi-time fault closing capability. In addition, the device reduces the inrush current thus eliminating the need for inrush current reactors that are used with breakers and other devices

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Cap1

CapSwitcher® 138kV

  • Cap1
  • Picturesque_full_front_view_of_161_kv_capswitcher
  • Close_up_reverse_angle_profile_view_of_38_kv_rack_mounted_capswitcher
  • Pictureque_reverse_angle_front_view_of_161_kv_capswitcher
  • Picturesque_angled_profile_view_of_four_38_kv_size_rack_mounted_capswitchers
  • Still_another_close_up_angled_view_looking_upward_at_38_kv_rack_mounted_capswitcher
  • 38kv_capswitcher
  • Cap2
  • Render04

CapSwitcher Family Overview

Maximum Voltage 15.5 kV - 27 kV 15.5 kV - 38 kV 38 kV - 72.5 kV 123 kV - 170 kV
Capacitive Current Switching 400 A 600 A 600 A 630 A
Fault Interrupting Capability NA NA 25 kA To 40 kA
Rack or Pole Mount Yes Yes No No
Support Columns Included No No Yes Yes

 

  • Closing resistors provide the most reliable and consistently repeatable voltage and current transient suppression available in the market.
  • Designed and tested for restrike-free performance
  • Makes and breaks circuit in SF6 gas rather than in air
  • Simple. cost effective, mechanical design provides repeatability
  • Eliminates the need for inrush reactors
  • Long Life (10,000 operations)
  • Availability of multiple resistor sizes allows performance optimization
  • Each unit is completely assembled and tested at the factory with only the disassembly required to accommodate shipment restrictions being performed.
27 kV - CAP27M
  • Gas system with density switch switch on each interrupter with low gas alarm and lockout contacts.  Integrated gauge and density switch is available as an option.
  • Available with integrated capacitor control (VAR, Voltage, Current, TOD, Temp, SCADA).
38 kV - CAP38M
  • Gas system with density switch on each interrupter with low gas alarm and lockout contacts. Integrated gauge and density switch is available as an option.
  • Directly retrofits into installations which previously used vacuum capacitor switches or oil capacitor switches.
38 kV - 170 kV
  • Gas system with pressure gauge, density switch, low pressure alarm and lockout contacts.
  • Simple, easy erection minimizes field installation time required.

Ratings

Maximum Voltage 15.5 kV 27 kV 38 kV
BIL 110 kV 150 kV 200 kV
Rated Power Frequency 50/60 Hz
Continuous Current 600 A
Capacitive Switching Current 600 A
Short-Time Symmentrical Withstand 40 kA RMS (2 sec)
Rated High-Frequency Transient-Making Current 42 kA peak at 8100 Hz
Endurance Life 10,000 operations
Ambient Temperature Rating -50o C to +50o C 
Capacitor Switching Ratings (IEEE C37.09a-2005)
Capacitive Switching Current 600 A
High Frequency Transient Making Current 23 kA peak at 5400 Hz
Closing Resistor Value 6 Ω, 10 Ω, or 20 Ω 12 Ω, 20 Ω, or 30 Ω 12 Ω, 30 Ω, or 90 Ω

Ratings

Maximum Voltage 38 kV 48.3 kV 72.5 kV 123 kV 145 kV 170 kV
BIL 200 kV 250 kV 350 kV 550 kV 650 kV 750 kV
Continuous Current 600 A 650 A
Primary Fault Interrupting Rating 25 kA RMS (standard and -50o C) 40 kA RMS (standard)
25 kA RMS (optional -50o C)
Short-Time Symmentrical Withstand 40 kA RMS 40 kA RMS (1 sec)
63 kA RMS (18 cycles)
Endurance Life 10,000 operations 10,000 operations
Ambient Temperature Rating -40o C to +50o C (standard)
-50o C to +50o C (optional)
-40o C to +50o C (standard)
-50o C to +50o C (optional)
Capacitor Switching Ratings (IEEE C37.09a-2005)
Capacitive Switching Current 600 A 650 A
High Frequency Transient Making Current 18 kA peak at 4630 Hz 20 kA peak at 4600 Hz
Closing Resistor Value 12 Ω, 30 Ω, or 90 Ω 40 Ω or 20 Ω 40 Ω, or 80 Ω 37.5 Ω, 75 Ω, or 150 Ω 37.5 Ω, 75 Ω, 150 Ω, or 300 Ω 75 Ω, 150 Ω, or 300 Ω

Ratings

Maximum Voltage Rating (kV) 245 / 362
Rated Power Frequency Withstand Voltage  555 kV
Rated Lightning Impulse Withstand Voltage (BIL)  1300 kV
Rated Chopped Wave Voltage (Optional) 1680 kV
Rated Power Frequency 50/60 Hz
Rated Continuous Current 810 A
Rated Short-Time Withstand Current 40 kA RMS 1 sec (63 kA 18 cy) 
Rated Peak Withstand Current 40 kA rms - 104 kA peak
Rated Interrupting Time 3 cycles
Rated Duty Cycle 0 - CO

Capacitor Switching Ratings

Shunt Capacitor Bank Switching Current  810 A
Back to Back Capacitor Bank Breaking Current 810 A
Peak Capacitive Inrush Current  4250 Hz 25 kA
Resistor Value

TBD

Pre-insertion time 6-10 ms

Environmental Ratings Standard -30º C to +50º C
Gas Fill Pressure 96 psig NOM / 76 psig MIN

 

Above service ratings are for the following service conditions:

  • The maximum altitude is (3280 ft) 1000 m.
  • The maximum wind velocity should not exceed 90mph (40 m/s)
  • The seismic performance is Low Performance  Level as defined in IEEE 693

Higher service conditions are available and will be stated in other documents associated with the specific switcher purchase.

Ratings

Maximum Voltage 15.5 kV 27 kV
BIL 110 kV 150 kV
Rated Power Frequency 50/60 Hz
Continuous Current 400 A
Capacitive Switching Current 400 A
Short-Time Symmentrical Withstand 25 kA RMS (1 sec)
Endurance Life 10,000 operations
Ambient Temperature Rating -35o C to +50o C 
Capacitor Switching Ratings (IEEE C37.09a-2005)
Capacitive Switching Current 400 A
High Frequency Transient Making Current 25 kA peak at 4400 Hz
Closing Resistor Value Matched to bank size for optimum performance

Single Capacitor Bank

Back-to-Back Capacitor Banks

Grounded or Ungrounded Banks

Wind Farm & Renewable Generation Collector Stations

SVC and dynamic reactive power compensation systems

Transformer Switching and Protection

Capacitor Bank

Single Capacitor Bank

Back-to-Back Capacitor Banks

Grounded or Ungrounded Banks

Wind Farm & Renewable Generation Collector Stations

SVC and dynamic reactive power compensation systems

Transformer Switching and Protection

Capacitor Bank