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SERIES TR-7
SAFE-T-GROUND
Explosion-Proof, Intrinsically Safe, Ground Continuity Control
8-1/16 [204.77]
5-25/32
[146.91]
4-31/64
[113.79]
7/16
[11.11]
6-5/8 [168.28]
3/4 NPT CONDUIT
OPENING [TYP.]
PROCESS CONTROL
The Series TR-7 Safe-T-Ground provides continuous monitoring of a truck’s ground
connection throughout loading operations. The TR-7 instantly stops loading operations
if a tank truck loses its ground. To safeguard loading operations, the Safe-T-Ground
circuit can be wired into your pump control, and to an audible alarm or signal light.
BENEFITS/FEATURES
• Explosion-proof housing
• Audible alarm and LED status indicators
APPLICATIONS
• Chemical
• Oil and gas
MODEL CHART
Example TR-7 -X B L TR-7-XBL
Construction TR-7 Explosion-proof and intrinsically safe
Power Supply
Option
Cable Length -
Cable
Connection
Options L* Red and green indicating lights*
*Not available with 220/240 VAC power supply.
MODEL CHART
Model Description
TR-7
Safe-T-Ground
TR-7-L
Safe-T-Ground with integral pilot lights
U
X
120 VAC (standard)
220/240 VAC
36˝ coiled, extends to 16´ (standard)
72˝ coiled, extends to 32´
-
Stud (standard)
B
Battery (alligator) clamp
SPECIFICATIONS
Housing: 356-T6 cast aluminum alloy (copper-free), explosion-proof – Class I,
Group D.
Size: 6-5/8˝ W x 10-3/8˝ H x 5-5/8˝ D.
Temperature Limits: -13 to 104°F (-25 to 40°C).
Power Requirements: 105-125 VAC, 60 Hz. 7.75 watts - with light, 1.75 watts -
without lights. Optional 220-240 VAC, 50/60 Hz.
Electrical Rating, Relay: DPDT, 10 A, 125 VAC, 60 Hz contact rating.
Wiring: Terminal strip.
Conduit Connection: 3/4˝ NPT.
Installation: 7/16˝ mounting lugs, integrally cast.
Contactor: (Grounding clamp) molded polyethylene with beryllium copper contact
clips. 16-2 type SO coiled cable; retracts to 3´, extends to 16´.
Grounding Studs: 2 supplied. Order a pair for each truck.
Shipping Weight: 20 lb with contactor and cord.
Compliance: UL.
Safety
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