Moving the Safety Curve from Cables and Basic Clamps

In facilities where combustible and flammable products are processed, the generation of static electricity as a result of the movement of gases, liquids and solids is extremely likely. The discharge of static electricity in an EX/HAZLOC area is associated with a high probability of causing a fire or explosion, therefore ensuring the protection of workers and company assets from the ignitions caused by static electricity are of a crucial importance. In fact, North American and European legislation classifies static electricity as a potential source of ignition in potentially inflammable and combustible atmospheres. The grounding and bonding of equipment has been shown to be the most effective and reliable method to ensure that company personnel and equipment are protected from the hazards of static electricity generation.

Current Methods of Controlling Industrial Generation of Static Electricity

The most important method of maintaining the proper protection of personnel and related assets in the industrial setting involves ensuring that an electrical resistance of 10 ohms or less exists between the electrically conductive plant equipment, of which can include but is not limited to mobile plant, people and vehicles, and the true earth grounding point. This point, which is also referred to as a “ground source,” will typically have a low resistance connection to the general mass of the earth and will transmit an electrostatic charge, which subsequently allows for the removal of the risk of static electricity ignition from occurring at the processing location.

Traditional plier type basic clamp.

Figure 1. Traditional plier type basic clamp.

Grounding equipment, such as drums, vessels and vehicles like trucks and railcars, has traditionally been achieved through the use of basic clamps that were assumed to make a direct connection to the equipment. Since issues such as product build-up and protective coatings have been shown to impede the integrity of these grounding clamp connections, as well as rusted and degraded cable connections, industrial workers looked to other types of protective grounding equipment.

Traditional wall mounted ground status indicator system

Figure 2. Traditional wall mounted ground status indicator system with internal output contacts. Note the green for ‘SAFE TO GO’ indication method.

Newer types of ground status indicators, which are also referred to as static grounding systems, are capable of monitoring the connection to the equipment that is at risk of static charge accumulation while simultaneously providing a visual reference to workers. These visual references allow workers to recognize when they have a secure ground connection, which is demonstrated by a green light, thereby informing them to proceed with the process. Additionally, most currently used static grounding system contain output contacts that can be interlocked with the process, thereby ensuring that the equipment is grounded before any process that could possibly generate static electricity is initiated.

Since most solution specifiers would prefer multiple layers of protection over electrostatic ignition, it is often too expensive and therefore not feasible to implement multiple static grounding systems. Additionally, there is a lack of automatic systems that can control processes that have a high risk of generating static electricity.

Bond-Rites

Figure 3. Bond-Rites provide operators with ‘SAFE TO GO’ visual indicators.

Bond-Rite ® Products

The Bone-Rite ® family of products allow product specifiers to control their electrostatic ignition hazards at a much more reliable manner as compared to traditional clamps and cables while simultaneously limiting the burden of justifying the purchases associated with interlocking grounding systems.

ond-Rite ® Products

Bond-Rites continuously monitor the connection of the equipment until the clamp is removed, thereby providing users with simple operation. To indicate that a specified equipment has a resistance of 10 ohms or less, Bond-Rites utilize a pulsing green LED signal. As long as the green LED signal is visible and pulsing, the operator of the equipment is aware that they are working in a safe condition. Bond-Rite products also come in a variety of configurations that can complement the ignition control requirements of numerous products, thereby providing users with a flexible installation and engagement when during their use. Additionally, as compared to traditional static grounding systems, Bond-Rite products provide 2.3 of the level of protection over controlling potential static ignition hazards at ½ of the cost.

The Bond-Rite REMOTE EP

Figure 5. The Bond-Rite REMOTE EP power supply can power up to 10 Bond-Rite REMOTEs simultaneously.

Bond-Rite products are offered as Bond-Rite CLAMP or REMOTE. Bond-Rite CLAMP is ideal for applications in which the operator requires an immediate visual verification of a secure 10 ohms or less regarding the connection to the equipment being at risk of accumulating electrostatic charges. If the visual indicator may be obscured during the operation process, such as during coatings mixing operations, the Bond-Rite REMOTE is more appropriate. The Bond-Rite REMOTE configuration enables and LED and circuit electronics to be wall mounted. Both the Bond-Rite CLAMP and REMOTE are powered by a 9 V battery that can be easily replaced when required. The Bond-Rite EZ is a portable device that bonds equipment to determine that it is at the same electrical potential, or that it can be used to directly ground objects to a verified earth. The Bond-Rite EZ product consists of a Bond-Rite CLAMP that is attached to a standard or large stainless steel heavy duty clamp with 2 pole Cen-Stat™ cable.

In this example the truck has a verified ground ® connection with the Earth-Rite RTR static grounding system. The gravity fed metal IBC (tote) is grounded via the truck with the portable Bond-Rite EZ.

Figure 6. In this example the truck has a verified ground ® connection with the Earth-Rite RTR static grounding system. The gravity fed metal IBC (tote) is grounded via the truck with the portable Bond-Rite EZ.

Bond-Rite ® CLAMP

Bond-Rite ® CLAMP

  • Equipped with a green LED indicator and grounding circuit mounted in a rugged stainless steel clamp
  • Equipped with a replaceable 9V battery
  • Simple installation
  • Can be operated in all EX and HAZLOC areas

Bond-Rite ® REMOTE

Bond-Rite ® REMOTE

  • Equipped with a wall mounted indictor station with heavy-duty stainless steel 2 pole standard and large sized grounding clamps. Station can be available in static dissipative GRP and stainless steel.
  • Ideal for processes where the pulsing green LED may be obscured during the process
  • Can be utilized by a 9V battery that can run for up to an hour
  • Can be operated in all EX and HAZLOC areas

Bond-Rite ® REMOTE (EP)

Bond-Rite ® REMOTE (EP)

  • Equipped with a wall mounted indictor station with heavy-duty stainless steel 2 pole standard and large sized grounding clamps. Station can be available in static dissipative GRP and stainless steel.
  • 230 V AC / 115 V AC power supply
  • Can be mounted in Zone 2/21 and Class I, II, III/Div. 2 atmospheres
  • Can power up to 10 individual pieces of plant equipment with simultaneous grounding
  • Ideal for intensive production processes and where the equipment requires continuous grounding verification, particularly processes lasting longer than 6 hours per day.
  • Can be operated in all EX and HAZLOC areas

Bond-Rite ® EZ

Bond-Rite ® EZ

  • Portable bonding verification device
  • Consists of a Bond-Rite ® Clamp that is attached to a standard or large stainless steel heavy-duty clamp with 2 pole Cen-State cable.
  • Ideal for bonding portable equipment
  • Equipped with continuously pulsing LED light.
  • Equipped with a replaceable 9V battery
  • Can be operated in all EX and HAZLOC areas

Two Pole Clamps and Cables

Two Pole Clamps and Cables

  • FM / ATEX certified static grounding clamps
  • Compatible with all Bond-Rite ® REMOTE and Bond-Rite ® EZ
  • VESX90-IP large clamp is ideal for connecting to large objects (e.g., railcars and IBCS)
  • VESX45-IP standard clamp is ideal for clamping onto 205 liters (1 gallon) drums and smaller containers

This information has been sourced, reviewed and adapted from materials provided by Newson Gale.

For more information on this source, please visit Newson Gale.

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