VES-U 69-230kV Capacitor Switches
Ideally suited for capacitor switching on 69kV to 230kV systems.
Vesco VES-U® Capacitor Switches
- Vacuum interruption and solid dielectric insulation provide completely oil-free operation, and explosive or combustible materials won’t compromise the safety of personnel or equipment
- Modular design — change voltage rating simply by adding or removing vacuum contact modules
- Completely sealed construction for long, virtually maintenance-free service life, with no heaters or routine exercise required
- Wide choice of control options ensures dependable switching of magnetizing current, cable or line charging current or load current of any power factor
- Available Zero Voltage Closing (ZVC) Control closes three switch poles independently, synchronized with the occurrence of zero voltage in each phase, eliminating overvoltage duty on capacitors and system overvoltage disturbances
- Direct replacement for Joslyn Hi-Voltage VBU style switches of similar design
- Replacement parts are readily available for existing installations including full mechanisms, controls, interrupter modules, and others.
Vesco VES-U® Capacitor Switches are sealed against the environment, immune to ice and contamination and designed to withstand system voltage continuously in the open position. The completely sealed operating mechanism requires neither heaters nor routine exercise.
Suitable for all loads, the reliable vacuum interrupters in the VES-U capacitor switches ensure dependable switching of magnetizing current, cable or line charging current or load current of any power factor. VES-U capacitor switches are ideally suited for capacitor switching.
Vesco VES-U capacitor switches can be applied on 69kV to 230kV systems. The flexibility of their modular design makes a change in the voltage rating of VBU capacitor switches as simple as adding or subtracting the appropriate number of vacuum contact modules.
VES-U capacitor switches are free of explosive or combustible materials and are designed to be virtually maintenance-free. Normal operation inspections should be conducted every 5–10 years or 10,000 operations. Testing, when required, is fast and easy.
Vesco VES-U capacitor switches ship completely assembled and adjusted. They are lightweight and easy to install, requiring a minimum of structural support and space. Less expensive to purchase and install than circuit breakers, they are often mounted on potential transformer stands and offer quiet yet high-speed operation.
Specifications and Ratings
The VES-U capacitor switch yields a very long service life with a modular design including vacuum interrupter modules connected electrically in series and mechanically in parallel. The VBU system is supplied with the appropriate number of modules determined by recovery voltage considerations for specific applications (refer to VES-U Ratings table). Order by fully describing the application, options and accessories.
Specifications
- Standard Control Features Include:
- Electrical Operations Counter, Heater, Anti-Single Phasing Circuit
- Voltage Class: 69kV–230kV
- Continuous Current (Amperes): 600
- Fault Interrupting Current (Amperes, Symmetrical): 4,000
- Momentary Current (Amperes, Asymmetric): 40,000
- Two-Second Current (Amperes): 10,000
- Three-Second Current (Amperes): 8,000
- Four-Second Current (Amperes): 7,000
- Closing Time: 55 milliseconds
- Max. Interrupt Time: 2 cycles
- Control Current Close: 1A peak at 48VDC or 125VDC
- Control Current Trip: 18A at 125VDC; 54A at 48VDC
Ratings
| Rated Maximum Voltage (kV) |
L-G BIL (kV) | Term. to Term. BIL (kV) |
Interrupter Modules per Phase |
A | B | Weight per Phase (lbs.) |
Primary Application* |
| 72 | 350 | 400 | 4 | 8′ 7 1⁄4″ | 30″ | 710 | T G U |
| 121 | 550 | 550 | 5 | 11′ 1 1/4″ | 48″ | 860 | T G |
| 121 | 550 | 750 | 7 | 13′ 1 1/4″ | 48″ | 940 | U |
| 145 | 750 | 650 | 6 | 13′ 1 1/4″ | 60″ | 950 | T |
| 145 | 750 | 750 | 7 | 14′ 1 1/4″ | 60″ | 990 | G |
| 145 | 750 | 850 | 8 | 15′ 1 1/4″ | 60″ | 1,030 | U |
| 169 | 750 | 750 | 7 | 14′ 1 1/4″ | 60″ | 990 | T |
| 169 | 750 | 850 | 8 | 15′ 1 1/4″ | 60″ | 1,030 | G |
| 169 | 750 | 950 | 9 | 16′ 1 1/4″ | 60″ | 1,070 | U |
| 242 | 900 | 950 | 9 | 17′ 7 1/4″ | 78″ | 1,180 | T G |
* Primary Application Codes:
T = Transformer Switching & Fault Protection — Grounded or Ungrounded
G = Shunt Capacitor or Reactor Switching — Solidly Grounded Source & Load
U = Shunt Capacitor or Reactor Switching — Ungrounded Source or Load
Please contact Vesco Application Engineering staff for recommended inrush current-limiting reactor size if applied for back-to-back capacitor banks.
