Scully ST-47 Groundhog Static Ground Proving Control Unit

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Scully ST-47 Groundhog Static Ground Proving Control Unit

Vehicle Static Ground Verification System

Self-proving technology based on Scully’s original patented design
Can operate in conjunction with your Scully Overfill Prevention System (ST-35® or ST-15) or as an independent ground verification unit
Immediately shuts down the loading operation if proper static grounding is not detected

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Description
Brand
Features
Variants
Tech Specs

The system consists of a rack mounted control housing with two installation methods. 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 system experience along with the dependability, service and safety Scully is known for. The Scully Groundhog™ grounding system can be used for a wide variety of loading applications for use with tank trucks, rail cars, and aircraft refuelers.

AYTC is an authorized full service distributor of Scully products. Scully is the market leader in overfill prevention systems, retained product monitoring, vehicle grounding, level alert notification and vehicle to terminal communications.

Can be used with a variety of loading operations including tank trucks, rail tank cars, aircraft refuelers and tanks to ensure that transport vehicles are properly tied to ground before and during the loading operation
The ST-47 Static Grounding system continuously monitors the ground connection and if that connection is lost, the ST47 will non-permit
For stand-alone grounding without overfill prevention, choose the junction box with choice of Scully ground-proving plug or grounding clamp
For static ground verification in conjunction with your Scully Overfill Prevention system, wire the ST-47 through your Overfill Prevention Control Monitor and plug and cable for one quick overfill protection and static grounding/earthing connection
Direct earthing tie-in point at loading rack is available

CONTROL UNITS

PART#	MODEL#	DESCRIPTION
08508	ST-47-115 EL	Groundhog Control Monitor with Lamps (115 VAC)
08220	ST-47-115 ELK	Groundhog Control Monitor with Lamps and Key Bypass Switch (115 VAC)
08675	ST-47-240 EL	Groundhog Control Monitor with Lamps (240 VAC)
08502	ST-47-240 ELK	Groundhog Control Monitor with Key Bypass Switch (240 VAC)

SCULCON JUNCTION BOX w/ SCULLY GROUNDING PLUG

PART#	MODEL#	DESCRIPTION
08249	SC-47	Heavy-Duty Junction Box, with 20′ straight cable and ground proving plug for connection to vehicle-mounted ground proving ball (independent system)
08567	SC-47CC	Heavy-Duty Junction Box, with 32′ coiled cable and ground proving plug for connection to vehicle-mounted ground proving ball (independent system)
08653	SC-47CC/D	Heavy-Duty Junction Box, with 32’ coiled cable and ground proving plug with additional circuitry for deadman switch; aviation applications

SCULCON JUNCTION BOX W/SCULLY GROUNDING VERIFICATION CLAMP

PART#	MODEL#	DESCRIPTION
08815NV	ST-47CC/CLMP	Sculcon Junction Box, with grounding clamp and 32’ coiled cable
09333	ST-47/CLMP	Sculcon Junction Box, with grounding clamp and 20’ straight cable

ACCESSORIES & REPLACEMENT PARTS

Part#	Description
08274	Ground Ball, truck-mounted electronic ground proving ball for independent grounding system
08560	Ground Bolt, truck-mounted electronic ground proving bolt for wiring to overfill prevention socket
08566	Coiled Cable, replacement plug and 32′ coiled cable assembly for SC-47
08219	Straight Cable Replacement Plug and 20′ Straight Cable Assembly for SC-47
08565	Plug, replacement plug only for SC-47
09511	Module 115, replacement module for 115 VAC models
27005	Bulb, 135V, replacement indicator lamp bulb for 115 VAC older models
09384	LED Bulb- Red LED Candelabra for 120V
09512	Module 240- Replacement Module for 240 VAC Models
27006	Bulb, 250V- Replacement Indicator Lamp Bulb for 240 VAC Models
09385	LED Bulb- Green LED Candelabra for 120V
08863	Deadman Control- Deadman Switch with Coiled Cable

Some applications such as rail lines and pipelines may also have stray currents present. In these situations, the rail or pipeline must be bonded to ground independently from the Scully ST-47 system.

Operation Temperature:	-40˚ to +140˚ F (-40˚ to +60˚ C)
Enclosure:	Explosion-Proof Weather-Proof Housing, suffix “E”
Indicators:	Red−not grounded/non-permit. Green−grounded/permit.
Response Time:	0.5 seconds maximum.
Electrical Connections:	Internal terminal strips, identified for easy installation.
Bypass Switch:	Key lockable off-on bypass switch for ELK model only.
Output Control:	One normally open user contact rated 250, 5A resistive load.
Power Requirements:	ST-47–115 Models: 105–125 VAC, 50/60 Hz. 0.250 Amperes maximum.
	ST-47–240 Models: 208–240 VAC, 50/60 Hz.0.125 Amperes maximum.
Shipping Weights:	ST-47 ELK; 26 lbs (12 kgs)
	ST-47 EL; 26 lbs (12 kgs)
	SC-47; 9 lbs (4 kgs)
Approvals:	Explosion-proof with intrinsically safe ground connection outputs. Rated for Class I, Division 1, Groups C & D Hazardous (Classified) Locations, by FM Global (FM) to Canadian and United States standards.