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ST-47 Groundhog Static Ground Proving Control Unit

Brand: Scully Signal Company
Don't let unsure grounding methods leave you guessing. Transport vehicles should be properly tied to ground before and during the loading operation. There should never be any doubt that the grounding systems at your terminals are performing their proper function. Many systems give you little assurance of their operation. The Scully Groundhog gives you complete assurance that a proper static ground tie-in is present. 

The Groundhog is a self-proving ground verification system for maximum safety in loading operations. It can operate in conjunction with your existing Scully Overfill Prevention System or as an independent unit. Scully Signal Company has over 30 years of electronic liquid handling experience providing the ultimate dependability, service and safety. 

The Scully Groundhog ground verification system can be used for a wide variety of loading applications for use with tank trucks, rail cars, and aircraft refuelers.

IMPORTANT 
Static grounding is used to dissipate any static charges which can build up as a result of product flow or other vehicle movement. These charges over time may build up and exceed the ratings of the ST-47. Some applications such as rail lines and pipelines may also have stray currents present. In these situations the vehicle, rail, and pipeline must be bonded to ground independently from the Scully system. 

Local codes should be consulted regarding wire gauges and number of conductors. Refer to American Petroleum Institute (API) Recommended Practice 2003 “Protection Against Ignitions Arising out of Static, Lightning, and Stray Currents”, and NFPA 77, s Arising out of Static, Lightning, and Stra. for accepted earth bonding practices.
Features
  • Self-Proving, the Groundhog continuously monitors the grounding connection throughout the loading operation
  • Can be used in conjunction with your Scully Overfill Prevention System offering one quick connection for overfill protection and grounding verification
  • Can also be used as a completely independent* ground verification system with a special quick-release plug for grounding to a specially designed, vehicle mounted, electronic ball
  • Direct earthing tie point at loading rack available
  • Immediately shuts down the loading operation if proper static grounding is not present
  • FM approved 
  • No manual checks are needed
Don't let unsure grounding methods leave you guessing. Transport vehicles should be properly tied to ground before and during the loading operation. There should never be any doubt that the grounding systems at your terminals are performing their proper function. Many systems give you little assurance of their operation. The Scully Groundhog gives you complete assurance that a proper static ground tie-in is present. 

The Groundhog is a self-proving ground verification system for maximum safety in loading operations. It can operate in conjunction with your existing Scully Overfill Prevention System or as an independent unit. Scully Signal Company has over 30 years of electronic liquid handling experience providing the ultimate dependability, service and safety. 

The Scully Groundhog ground verification system can be used for a wide variety of loading applications for use with tank trucks, rail cars, and aircraft refuelers.

IMPORTANT 
Static grounding is used to dissipate any static charges which can build up as a result of product flow or other vehicle movement. These charges over time may build up and exceed the ratings of the ST-47. Some applications such as rail lines and pipelines may also have stray currents present. In these situations the vehicle, rail, and pipeline must be bonded to ground independently from the Scully system. 

Local codes should be consulted regarding wire gauges and number of conductors. Refer to American Petroleum Institute (API) Recommended Practice 2003 “Protection Against Ignitions Arising out of Static, Lightning, and Stray Currents”, and NFPA 77, s Arising out of Static, Lightning, and Stra. for accepted earth bonding practices.
Features
  • Self-Proving, the Groundhog continuously monitors the grounding connection throughout the loading operation
  • Can be used in conjunction with your Scully Overfill Prevention System offering one quick connection for overfill protection and grounding verification
  • Can also be used as a completely independent* ground verification system with a special quick-release plug for grounding to a specially designed, vehicle mounted, electronic ball
  • Direct earthing tie point at loading rack available
  • Immediately shuts down the loading operation if proper static grounding is not present
  • FM approved 
  • No manual checks are needed
Models matching criteria: 20
ST-47-115 EL Control Monitor with Lamps (115 VAC operation)
ST-47-115 ELK Control Monitor with Lamps and Key Protected Bypass Switch (115 VAC operation)
ST-47-115 ELK/D Control Monitor with Lamps and Key Protected Bypass Switch (115 VAC operation) With Deadman Switch
ST-47-240 EL Control Monitor with Lamps (240 VAC operation)
ST-47-240 ELK Control Monitor with Lamps and Key Protected Bypass Switch (240 VAC operation)
SC-47 Rack Mounted Heavy Duty Junction Box with 20' Straight Cable and Ground Proving Plug for Connection to Vehicle Mounted Ground Proving Ball (Independent System)
SC-47CC Rack Mounted Heavy Duty Junction Box with 32' Coiled Cable and Ground Proving Plug for Connection to Vehicle Mounted Ground Proving Ball (Independent System)
SC-47CC/D Same as SC-47-CC with Additional Circuitry for the Deadman Switch for Aviation Applications
Replacement Parts - Ground Ball Truck Mounted Electronic Ground Proving Ball for Independent Grounding System
Replacement Parts - Ground Bolt Truck Mounted Electronic Ground Proving Bolt for Wiring to Overll Prevention Socket
Replacement Parts - Coiled Cable Replacement Plug and 32' Coiled Cable Assembly for SC-47
Replacement Parts - Straight Cable Replacement Plug and 20' Straight Cable Assembly for SC-47
Replacement Parts - Plug Replacement Plug only for SC-47
Replacement Parts - Module 115 Replacement Module for 115 VAC Models
Replacement Parts - Bulb, 135V Replacement Indicator Lamp Bulb for 115 VAC Older Models
Replacement Parts - LED Bulb Red LED Candelabra for 120 V
Replacement Parts - Module 240 Replacement Module for 240 VAC Models
Replacement Parts - Bulb, 250 V Replacement Indicator Lamp Bulb for 240 VAC Models
Replacement Parts - LED Bulb Green LED Candelabra for 120 V
Replacement Parts - Deadman Control Deadman Switch with Coiled Cable

Specifications

Enclosure

  • Explosion-Proof Weather-Proof Housing

Indication

  • Green−Grounded/Permit
  • Red−Not Grounded/Non-Permit

Response Time

  • 0.5 s Max.

Operating Temperature

  • -40° to +60° C (-40° to +140° F)

Power Requirement

  • ST-47-115 Models: 105-125 Vac, 50/60 Hz, 0.25 A Max.
  • ST-47-240 Models: 208-240 Vac, 50/60 Hz, 0.125 A Max.

Certifications & Approvals

  • cFMus