Model 5PS Bulb
Solon Model 5PS SF6 Gas Density Switch
Bulb Design
The series 5PS density switches are rugged temperature compensated pressure switches designed for use on:
- High Voltage Circuit Breakers.
- Gas Insulated Substations
- Gas Insulated Bus Systems.
A remote bulb at the end of a capillary tube leading to the housing where the switching mechanism is located senses the temperature of the gas. The temperature compensation feature allows the pressure switch to ignore pressure changes of the gas due to changing temperature and operate only when a loss of gas is detected indicating a change in density. The switching mechanism is located in a rugged cast aluminum housing. This housing can be installed in a convenient location as temperature surrounding the housing does not affect the operation of the switch. One or two full size SPDT electric switches can be operated by the mechanism in the housing. The 5PS series density switches have been used to monitor gas density systems since 1975. All density switches are manufactured to customer specifications. Once installed, they require no maintenance or field calibration. Each device is factory tested at several temperatures that always include -40F. Constant refinement of design and components allows Solon to quickly develop new model variations to meet customer's changing specifications.
SPECIFICATIONS
Switching: 2 SPDT snap acting switches
Electrical Connection: Screw terminals standard, Pre-wired with 18" leads available
Switch Contact Ratings: 15A; 125, 480 VAC / 6A res.; 28 VDC std.
Setpoint Adjustment: Factory set per customer specifications
Temperature Range: -40°F to 140°F Ambient Standard, 0°F to 180°F available
Accuracy (Standard): ± 1.5 PSI at 70°F, ± 3 PSI at temperatures of 140°F to -40°F, Higher accuracy devices are available
Deadband (Switch Differential): Fixed; 1-6 PSI Typical (per Cust. requirements)
Pressure Sensing Element: Phosphor Bronze or Stainless Steel Bellows - 100% leak inspected with Helium mass spectrometry to 6 X 10 cc/sec.
Pressure Adjustment Range: Phosphor Bronze Bellows: 5-100 PSI; 150 PSI max., Stainless Stl. Bellows: 5-100 PSI; 300 PSI max., 150-500 PSI; 1000 PSI max.
Pressure Port:1/4 NPTF or 7/16-20 SAE are standard; Other port options are available.
Enclosure (optional): NEMA 1 standard, NEMA 4 available, Material 356 Cast Aluminum
Weight: Approximately 3-1/2 lbs (1.5 kg).
