Earth Interlocking System along with Weather Protection Enclosure

Model No.: EILS – 0621
Use: for Loading/Unloading of Tankers by Pumping

ESD Control Systems has been manufacturing Earth Interlock Systems for solvent tanker over last 9-years. considering ease of utility and without changing the entity parameters. The working of new model is as follows.

We have observed that majority of installations the pumps used serve dual purpose of pumping in words in to storage tanks, and also to pump to utility areas, therefore it is necessary to keep all the pumps of the solvent loading area in working condition when there is no tanker present for unloading.

To achieve this purpose, the instrument when not in use, stands at standby mode where all the concerned pumps keep working normal.

When a tanker arrives at bay for unloading, the instrument can be switched on by simple ON-OFF push buttons provided on the instrument. The middle yellow colour LED which lights during standby mode turns off taking the instrument into interlock mode all the pumps turn off.

The Red LED glows and buzzer gives Bip Bip signal while the clamp is hooked on to tanker body, The earth loop checks earthing resistance of tanker body to earth pit and if it is less than 9.5-Ohms (value preset at factory as peer IS/IES to less than 10 Ohms). green LED turns on, switching the Red LED off and also turning off the biping buzzer.

Read more

Now the setup is ready for starting the unloading operation. Since the earth loop is ok for the electro-static discharge all the pumps in solvent inlet areas become normal for operation and if there is no earth fault, will continue till all the unloading is done.

Now to return to standby mode push the red colour off switch, the instrument resumes standby mode the clamp and other hose pipes can be removed.

For clarity on installation work, two drawings are enclosed in the manual.

Schematic system block diagram depicting all the inter unit wiring and earth pit connections.

The System comes with a weather protection metallic cabinet which is floor mounted

Material pre requisition list is also given in the manual.

Introduction to the Subject

Explosive atmospheres in the workplace can be caused by flammable gases, mists or vapours or by combustible dusts. Explosions can cause loss of life and serious injuries as well as significant damage.

Background

Explosive atmospheres can be caused by flammable gases, mists or by combustible dusts. If there is enough of the substance, mixed with air, then all it needs is a source of ignition to cause an explosion. Accumulated static charges on equipments and tanker while solvents are handled, readily provides this third parameter.

Explosion can cause loss of life and serious injuries as well as significant damage. Preventing releases of dangerous substances, which can create explosive atmospheres, and preventing sources of ignition are two widely used ways of reducing the risk. Using the correct equipment can greatly help this.

The Dangerous Substances and Explosive Atmospheres Regulation 2002 (DSEAR) place duties on employers to eliminate or control the risks from explosive atmospheres in the workplace. A summary of those requirements can be found below.

This page does not deal with intentional explosives such as those used in demolition work or blasting in quarries.

What is an explosive atmosphere?

An explosive atmosphere is defined as a mixture of dangerous substances with air, under atmospheric condition, in the form of gases, vapours, mist or dust in which, after ignition has occurred, combustion spreads to the entire unburned mixture. An explosive atmosphere is an accumulation of gas, mist, dust or vapor, mixed with air, which has the potential to catch fire or Explosion. An explosive atmosphere does not always result in an explosion, but if it caught fire the flames would quickly travel though it and if this happens in a confined space (e.g., in plant or equipment) the rapid spread of the flames or rise in pressure could also cause explosion atmospheric conditions are commonly referred to as ambient temperatures and pressures. That is to say temperatures of – 200C to 400C and pressures of 0.8 to 1.1 bar…

Where can explosive atmospheres be found?

Many workplaces may contain, or have activities that produce, explosive or potentially explosive atmospheres. Examples include places where work activities create or release flammable gases or vapours, such as vehicle paint spraying, or in workplaces handling fine organic dusts such as grain flour or wood, classified as Zone-1.

Liquids 

Liquids (such as petrol and other fuels) and solvents in industrial products (such as paint, ink, adhesives and cleaning fluids) give off flammable vapour which, when mixed with air, can ignite or explode. Flammable liquids are classed as:

Extremely flammable

Liquids which have a flash point lower than 00C and a boiling point (or, in the case of a boiling range, the initial boiling point) lower than or equal to 350C.

Highly flammable

Liquids which have a flash point below 210C but which are extremely flammable.

Flammable Dusts 

Dusts can be produced from many everyday materials such as coal, wood, grain, sugar, certain metals and synthetic organic chemicals. A cloud of combustible dust in the air can explode violently if ignited.

Gases 

Gases such as liquefied petroleum gas or methane. These are usually stored under pressure in cylinders and bulk containers. Uncontrolled releases can readily ignite or cause the cylinder to become a missile.

Solids 

Solids include materials such as plastic foam, packaging, and textiles which can burn fiercely and give off dense black smoke, sometimes poisonous.

SCOPE OF THIS MANUAL

This manual provides complete information of installation, operation and maintenance procedures and instructions for operating Advanced Earth Interlocking System. Read this manual before attempting to install and operate EILS – 0621.

 Each EILS–0621 System consists of the following sub components or equipment:

  •       RED, GREEN AND YELLOW Hi- Bright LED Indictors.
  •       ESD EARTH CLAMP: Exclusively designed heavy-duty Stainless-Steel Grounding clamp with Tungsten Carbide Contacts assembly with extendable spiral cable. Extendable up to 10 Meters.

OVERVIEW

EILS-0621is a system useful for controlling Static Electricity Discharges in Hazardous areas in Bulk Drug, Chemical & Pharma and other industries handling inflammable liquids, solvents and explosive propellants. This system continuously monitors Earth connectivity to ground & prevents accumulation of static electricity and discharges during tanker un-loading and loading.

EILS-0621enables or disables power supply to existing transfer pump switching system. The pumps can only be switched “ON” manually for solvent transfer if the resistance to Ground (RG) from Tanker to Earth Connection is <= 10 Ohms. And the pump will be automatically stopped if there is by any chance Earth Failure or High Resistance is detected during solvent/chemical transfer.

The EILS-0621System continuously monitors the earth connection from Tanker to Earth Connection. It has RED, GREEN, YELLOW coloured high bright LED indication systems indicating, clamp contact to tanker and earth loop check of less than 10 OHMS and STAND BY Mode RESPECTIVELY. Operator can be easily alerted to know the status of grounding during Transfer Process with this unique technology.

This unit is designed specially by incorporating Spark free switching mechanism works with intrinsically safe ultra-low voltage & current feature. This system has highly sophisticated electronic sub-assemblies populated with high performance, long lasting and most reliable components from various reputed manufacturers.

The FLP enclosure meets industry standards, made out of Cast Aluminium with flame proof design, weather proof and certified by CMRI, Dhanbad. (Please find enclosed copy of certificate) and completely integrated unit is also tested for several Physical and Electrical tests like Burn-In test, Functional Testes, Mechanical Shock, Vibration, Drop, Dump etc. as desired by Industrial Applications.

The EILS-0621is a very important system wherever hazardous material is being transferred though tankers, bulk containers etc. this system has been designed in accordance to the requirements of the industry studied and continual development over a period of 4 years.

The EILS-0621is user friendly System, very easy to install and operate and available for prompt delivery with additional accessories and alternative cabling solutions.

The EILS-0621ensures the highest possible levels of safe, positive earthing for road tanker during flammable liquid transfer operations. Unlike conventional systems, the EILS-0621provides failsafe confirmation of the static earth condition using Industrial Grade Subcomponents Electronics.

 

Standards as per

IS/IEC 60079-0: 2017

IS/IEC 60079-11:2011

EILS-0621Features: 

  • EILS-0621is completely user-friendly system with less operating procedures.
  • EILS–0621 continuously monitors and alerts about Earth connectivity or Grounding system from Tanker to Earth pit.
  • EILS-0621is a complete brake to transfer of solvents if it detects high resistance (i.e.,>= 10 Ohms.) in the earth connection to tanker ensuring safety and accident-free zone during handling of solvents.
  • EILS – 0621. By means of LED indication and buzzer, it provides status of operator to machine interface in operational sequence. During unloading alerts, the operator through Red LEDs and buzzer and automatically stops all the pumps if it detects any earth fault.  
  • EILS-0621is built by considering various International Safety Standards in the safety etc.
  • Heavy-duty Stainless-Steel Grounding clamp is designed to connect all common tankers, drums, Process Equipments etc.
Read more

EILS-0621is useful for areas: 

  • Chemical industries.
  • Petrochemical industries.
  • Gas terminals.
  • Refineries. 
  • Aircraft refuelling systems.
  • Truck Loading terminals.
  • Harbour Bunker facilities.
  • Rail Tanker terminals etc.

Basic EILS-0621 System consists of: 

  1. Main unit consists of two compartments self-standing M.S. power coated whether proof housing. Upper white colour compartment with glass window houses the FLP enclosure and window stands at eyelevel. Blue colour lower cabinet houses the S.S. tanker clamp along with coiled P.U. tube with cable inside (stretchable up to 10 meters Length), when not in use. The door opening key is toed on to bag hook on right side under the top compartment. The clamp is taken out when clamping on to tanker.
  2. Safe area interlock unit is made of M.S, box wall mounting type and has interlock relay and pump motor control electrical out lets as shown in schematic block diagram.

Safe Area Unit:

 

1. Mechanical

a S. Fabricated enclosure. Powder-coated finish.

b Wall mounted with four screws over the sidewise extended Strips with ½” holes. 

c Length: – 315 mm width: – 265 mm, Height: – 140 mm. 

 2. Electrical

No. of cable entries: – 3 Nos. location bottom side 1st on left Cable Entry-1. 

1. 1.5mm² 4core flexible armored cable entry through single compression metal gland size ¾”/20mm cable. 

Termination

The finish end runs up to FLP Unit in Hazardous Area, and can be layed on existing cable tray.

Read more

Start-end connections as follows.

1) Red 12 V DC. 

2) Black 0 V. 

3) Yellow Interlock Control 12 V.

4) Blue 0 V.

 

3. Middle position cable entry

230 Volts input. Use 1mm² 2 Core/3core PVC cable taking supply from main panel 

Electrical Specification: – 

  1. a) Power input 230Volts ±10% AC 50Hz 
  2. b) Burden less than 10 watts continuous duty. Fuse protected 

4.  Electrical Grounding: -E1-E2.

4 mm threaded hole provided on each side top extended strip. Use it for electrical grounding. 

5. Cable Entry-3

Pump Motor Control line 230 Volts Interlock control wires termination on 1 to 10 terminal blocks.

These control wires originate from built in contactor. This provides 230 V link connection for control points of respective pump motors.

The existing control feed wire (230 Volts) to be replaced with one of the wires from control points. 

FLP Unit (Hazardous Area): – 

Mechanical

  • The FLP unit is housed inside a two-door powder coat finished self-standing MS Cabinet. 
  • Location of installation:  On left side of solvent inlet pipe structure. 
  •  It is mounted on floor.

Measure and enter  

  • Height: – 1700 mm
  • Width: –370 mm
  • Length: –470 mm

Bottom door 

  • In side on left top a bracket is provided to keep clamp when not in use, the spiral cable can also be accommodated inside. 
  • Right side below top portion a bag hook is provided to place cabinet opening key. 
  • FLP unit is located in the upper part of cabinet with separate door indication LED. Window comes at eye level. 

Electrical

No. of cable entries on FLP unit:  3 Nos.

  1. cable entry-1 Bottom left side. ¾”20mm double compression metal gland to intake 4-core cable entering in to cabinet through one of the ¾” grommet on rear bottom side of cabinet. 
  2. Cable entry-2 bottom left side.8-6 size polyurethane spiral pipe clamp connection. Already done at factory using double compression metal gland.
  3. Earth pit wire connection. Cable entry-3 bottom right side. 1.5 mm² 2-core PVC cable 5-metre wire length is already connected through double compression metal gland. Other end of cable through. ¾” grommet by the side of armoured cable entry. 

This wire end is to be connected to earth pit connection point of G.I. strips. 

WARNING: Ensure that the electrical installation conforms with your local and national safety requirements. It must be connected to a suitably fused and protected electrical supply and a suitable electrical earth point.

Follow the Steps given below with same sequence to operate the instrument properly.

FOR UNLOADING THE TANKER

STEP

OPERATION

MODE

INDICATION

 

Normal Position

Stand by

Red LED OFF

Yellow LED ON

Green LED OFF

1

 

Press ON Button

(Green-Interlock)

to start

Instrument ON

Standby OFF

Interlock ON

Red LED ON

Yellow LED OFF

Green LED OFF

Buzzer – ON

2

 

Connect Clamp to the Tanker

Instrument ON

Standby OFF

Interlock ON

Red LED OFF

Yellow LED OFF

Green LED ON

Buzzer – OFF

Read more

Interlock ON Mode: Now the tanker is grounded. Connect hose to the tanker and take all ESD.Precautions and Switch on the Pump for Un-Loading. 

After Unloading, Follow the steps given below for disconnecting Interlocking System to Standby mode.

STEP

OPERATION

MODE

INDICATION

1

Push Red (OFF) Button

Stand by

Instrument OFF Standby ON

Red LED OFF

Yellow LED ON

Green LED OFF

2

Remove the Clamp and place inside the cabinet

Instrument in Standby mode

Red LED OFF

Yellow LED ON

Green LED OFF

After Completion of Un-Loading operation and decoupling of Hoses, vehicle ready for deporting. Ensure that Earth Clamp is removed from Tanker

Caution: Changes or modifications to this product not expressly approved by ESDCS, or operation of this product in any way other than as detailed by this User Manual, could void your manufacturer warranty. (Please refer to the enclosed Warranty terms & Conditions.) 

Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any form or by any means like Electronic or Mechanical, for any purpose without the express written permission of ESD CONTROL SYSTEMS, HYDERABAD.

All and any type of Damage to any part of the unit including Sub Systems supplied caused by any reason would not be covered by the manufacturer’s warranty.

This data is provided for general information and material comparison. The potential user should perform tests to determine the product’s performance and suitability in the intended application. Final determination of the fitness of the product for any particular application is the responsibility of the buyer.

Earth Interlocking System along with Weather Protection Enclosure

Model No.: EILS – 0621
Use: for Loading/Unloading of Tankers by Pumping

ESD Control Systems has been manufacturing Earth Interlock Systems for solvent tanker over last 9-years. considering ease of utility and without changing the entity parameters. The working of new model is as follows.

We have observed that majority of installations the pumps used serve dual purpose of pumping in words in to storage tanks, and also to pump to utility areas, therefore it is necessary to keep all the pumps of the solvent loading area in working condition when there is no tanker present for unloading.

To achieve this purpose, the instrument when not in use, stands at standby mode where all the concerned pumps keep working normal.

When a tanker arrives at bay for unloading, the instrument can be switched on by simple ON-OFF push buttons provided on the instrument. The middle yellow colour LED which lights during standby mode turns off taking the instrument into interlock mode all the pumps turn off.

The Red LED glows and buzzer gives Bip Bip signal while the clamp is hooked on to tanker body, The earth loop checks earthing resistance of tanker body to earth pit and if it is less than 9.5-Ohms (value preset at factory as peer IS/IES to less than 10 Ohms). green LED turns on, switching the Red LED off and also turning off the biping buzzer.

Read more

Now the setup is ready for starting the unloading operation. Since the earth loop is ok for the electro-static discharge all the pumps in solvent inlet areas become normal for operation and if there is no earth fault, will continue till all the unloading is done.

Now to return to standby mode push the red colour off switch, the instrument resumes standby mode the clamp and other hose pipes can be removed.

For clarity on installation work, two drawings are enclosed in the manual.

Schematic system block diagram depicting all the inter unit wiring and earth pit connections.

The System comes with a weather protection metallic cabinet which is floor mounted

Material pre requisition list is also given in the manual.

Introduction to the Subject

Explosive atmospheres in the workplace can be caused by flammable gases, mists or vapours or by combustible dusts. Explosions can cause loss of life and serious injuries as well as significant damage.

Background

Explosive atmospheres can be caused by flammable gases, mists or by combustible dusts. If there is enough of the substance, mixed with air, then all it needs is a source of ignition to cause an explosion. Accumulated static charges on equipments and tanker while solvents are handled, readily provides this third parameter.

Explosion can cause loss of life and serious injuries as well as significant damage. Preventing releases of dangerous substances, which can create explosive atmospheres, and preventing sources of ignition are two widely used ways of reducing the risk. Using the correct equipment can greatly help this.

The Dangerous Substances and Explosive Atmospheres Regulation 2002 (DSEAR) place duties on employers to eliminate or control the risks from explosive atmospheres in the workplace. A summary of those requirements can be found below.

This page does not deal with intentional explosives such as those used in demolition work or blasting in quarries.

What is an explosive atmosphere?

An explosive atmosphere is defined as a mixture of dangerous substances with air, under atmospheric condition, in the form of gases, vapours, mist or dust in which, after ignition has occurred, combustion spreads to the entire unburned mixture. An explosive atmosphere is an accumulation of gas, mist, dust or vapor, mixed with air, which has the potential to catch fire or Explosion. An explosive atmosphere does not always result in an explosion, but if it caught fire the flames would quickly travel though it and if this happens in a confined space (e.g., in plant or equipment) the rapid spread of the flames or rise in pressure could also cause explosion atmospheric conditions are commonly referred to as ambient temperatures and pressures. That is to say temperatures of – 200C to 400C and pressures of 0.8 to 1.1 bar…

Where can explosive atmospheres be found?

Many workplaces may contain, or have activities that produce, explosive or potentially explosive atmospheres. Examples include places where work activities create or release flammable gases or vapours, such as vehicle paint spraying, or in workplaces handling fine organic dusts such as grain flour or wood, classified as Zone-1.

Liquids 

Liquids (such as petrol and other fuels) and solvents in industrial products (such as paint, ink, adhesives and cleaning fluids) give off flammable vapour which, when mixed with air, can ignite or explode. Flammable liquids are classed as:

Extremely flammable

Liquids which have a flash point lower than 00C and a boiling point (or, in the case of a boiling range, the initial boiling point) lower than or equal to 350C.

Highly flammable

Liquids which have a flash point below 210C but which are extremely flammable.

Flammable Dusts 

Dusts can be produced from many everyday materials such as coal, wood, grain, sugar, certain metals and synthetic organic chemicals. A cloud of combustible dust in the air can explode violently if ignited.

Gases 

Gases such as liquefied petroleum gas or methane. These are usually stored under pressure in cylinders and bulk containers. Uncontrolled releases can readily ignite or cause the cylinder to become a missile.

Solids 

Solids include materials such as plastic foam, packaging, and textiles which can burn fiercely and give off dense black smoke, sometimes poisonous.

SCOPE OF THIS MANUAL

This manual provides complete information of installation, operation and maintenance procedures and instructions for operating Advanced Earth Interlocking System. Read this manual before attempting to install and operate EILS – 0621.

 Each EILS–0621 System consists of the following sub components or equipment:

  •       RED, GREEN AND YELLOW Hi- Bright LED Indictors.
  •       ESD EARTH CLAMP: Exclusively designed heavy-duty Stainless-Steel Grounding clamp with Tungsten Carbide Contacts assembly with extendable spiral cable. Extendable up to 10 Meters.

OVERVIEW

EILS-0621is a system useful for controlling Static Electricity Discharges in Hazardous areas in Bulk Drug, Chemical & Pharma and other industries handling inflammable liquids, solvents and explosive propellants. This system continuously monitors Earth connectivity to ground & prevents accumulation of static electricity and discharges during tanker un-loading and loading.

EILS-0621enables or disables power supply to existing transfer pump switching system. The pumps can only be switched “ON” manually for solvent transfer if the resistance to Ground (RG) from Tanker to Earth Connection is <= 10 Ohms. And the pump will be automatically stopped if there is by any chance Earth Failure or High Resistance is detected during solvent/chemical transfer.

The EILS-0621System continuously monitors the earth connection from Tanker to Earth Connection. It has RED, GREEN, YELLOW coloured high bright LED indication systems indicating, clamp contact to tanker and earth loop check of less than 10 OHMS and STAND BY Mode RESPECTIVELY. Operator can be easily alerted to know the status of grounding during Transfer Process with this unique technology.

This unit is designed specially by incorporating Spark free switching mechanism works with intrinsically safe ultra-low voltage & current feature. This system has highly sophisticated electronic sub-assemblies populated with high performance, long lasting and most reliable components from various reputed manufacturers.

The FLP enclosure meets industry standards, made out of Cast Aluminium with flame proof design, weather proof and certified by CMRI, Dhanbad. (Please find enclosed copy of certificate) and completely integrated unit is also tested for several Physical and Electrical tests like Burn-In test, Functional Testes, Mechanical Shock, Vibration, Drop, Dump etc. as desired by Industrial Applications.

The EILS-0621is a very important system wherever hazardous material is being transferred though tankers, bulk containers etc. this system has been designed in accordance to the requirements of the industry studied and continual development over a period of 4 years.

The EILS-0621is user friendly System, very easy to install and operate and available for prompt delivery with additional accessories and alternative cabling solutions.

The EILS-0621ensures the highest possible levels of safe, positive earthing for road tanker during flammable liquid transfer operations. Unlike conventional systems, the EILS-0621provides failsafe confirmation of the static earth condition using Industrial Grade Subcomponents Electronics.

EILS-0621Features: 

  • EILS-0621is completely user-friendly system with less operating procedures.
  • EILS–0621 continuously monitors and alerts about Earth connectivity or Grounding system from Tanker to Earth pit.
  • EILS-0621is a complete brake to transfer of solvents if it detects high resistance (i.e.,>= 10 Ohms.) in the earth connection to tanker ensuring safety and accident-free zone during handling of solvents.
  • EILS – 0621. By means of LED indication and buzzer, it provides status of operator to machine interface in operational sequence. During unloading alerts, the operator through Red LEDs and buzzer and automatically stops all the pumps if it detects any earth fault.  
  • EILS-0621is built by considering various International Safety Standards in the safety etc.
  • Heavy-duty Stainless-Steel Grounding clamp is designed to connect all common tankers, drums, Process Equipments etc.
Read more

EILS-0621is useful for areas: 

  • Chemical industries.
  • Petrochemical industries.
  • Gas terminals.
  • Refineries. 
  • Aircraft refuelling systems.
  • Truck Loading terminals.
  • Harbour Bunker facilities.
  • Rail Tanker terminals etc.

Basic EILS-0621 System consists of: 

  1. Main unit consists of two compartments self-standing M.S. power coated whether proof housing. Upper white colour compartment with glass window houses the FLP enclosure and window stands at eyelevel. Blue colour lower cabinet houses the S.S. tanker clamp along with coiled P.U. tube with cable inside (stretchable up to 10 meters Length), when not in use. The door opening key is toed on to bag hook on right side under the top compartment. The clamp is taken out when clamping on to tanker.
  2. Safe area interlock unit is made of M.S, box wall mounting type and has interlock relay and pump motor control electrical out lets as shown in schematic block diagram.

Safe Area Unit:

 

1. Mechanical

S. Fabricated enclosure. Powder-coated finish.

Wall mounted with four screws over the sidewise extended Strips with ½” holes. 

Length: – 315 mm width: – 265 mm, Height: – 140 mm. 

 2. Electrical

No. of cable entries: – 3 Nos. location bottom side 1st on left Cable Entry-1. 

1. 1.5mm² 4core flexible armored cable entry through single compression metal gland size ¾”/20mm cable. 

Termination

The finish end runs up to FLP Unit in Hazardous Area, and can be layed on existing cable tray.

Read more

Start-end connections as follows.

1) Red 12 V DC. 

2) Black 0 V. 

3) Yellow Interlock Control 12 V.

4) Blue 0 V.

 

3. Middle position cable entry

230 Volts input. Use 1mm² 2 Core/3core PVC cable taking supply from main panel 

Electrical Specification: – 

  1. a) Power input 230Volts ±10% AC 50Hz 
  2. b) Burden less than 10 watts continuous duty. Fuse protected 

4.  Electrical Grounding: -E1-E2.

4 mm threaded hole provided on each side top extended strip. Use it for electrical grounding. 

5. Cable Entry-3

Pump Motor Control line 230 Volts Interlock control wires termination on 1 to 10 terminal blocks.

These control wires originate from built in contactor. This provides 230 V link connection for control points of respective pump motors.

The existing control feed wire (230 Volts) to be replaced with one of the wires from control points. 

FLP Unit (Hazardous Area): – 

Mechanical

  • The FLP unit is housed inside a two-door powder coat finished self-standing MS Cabinet. 
  • Location of installation:  On left side of solvent inlet pipe structure. 
  •  It is mounted on floor.

Measure and enter  

  • Height: – 1700 mm
  • Width: –370 mm
  • Length: –470 mm

Bottom door 

  • In side on left top a bracket is provided to keep clamp when not in use, the spiral cable can also be accommodated inside. 
  • Right side below top portion a bag hook is provided to place cabinet opening key. 
  • FLP unit is located in the upper part of cabinet with separate door indication LED. Window comes at eye level. 

Electrical

No. of cable entries on FLP unit:  3 Nos.

  1. cable entry-1 Bottom left side. ¾”20mm double compression metal gland to intake 4-core cable entering in to cabinet through one of the ¾” grommet on rear bottom side of cabinet. 
  2. Cable entry-2 bottom left side.8-6 size polyurethane spiral pipe clamp connection. Already done at factory using double compression metal gland.
  3. Earth pit wire connection. Cable entry-3 bottom right side. 1.5 mm² 2-core PVC cable 5-metre wire length is already connected through double compression metal gland. Other end of cable through. ¾” grommet by the side of armoured cable entry. 

This wire end is to be connected to earth pit connection point of G.I. strips. 

WARNING: Ensure that the electrical installation conforms with your local and national safety requirements. It must be connected to a suitably fused and protected electrical supply and a suitable electrical earth point.

Follow the Steps given below with same sequence to operate the instrument properly.

FOR UNLOADING THE TANKER

STEP

OPERATION

MODE

INDICATION

 

Normal Position

Stand by

Red LED OFF

Yellow LED ON

Green LED OFF

1

 

Press ON Button

(Green-Interlock)

to start

Instrument ON

Standby OFF

Interlock ON

Red LED ON

Yellow LED OFF

Green LED OFF

Buzzer – ON

2

 

Connect Clamp to the Tanker

Instrument ON

Standby OFF

Interlock ON

Red LED OFF

Yellow LED OFF

Green LED ON

Buzzer – OFF

Read more

Interlock ON Mode: Now the tanker is grounded. Connect hose to the tanker and take all ESD.

Precautions and Switch on the Pump for Un-Loading.

After Unloading: Follow the steps given below for disconnecting Interlocking System to

Standby mode.

STEP

OPERATION

MODE

INDICATION

1

Push Red (OFF) Button

Stand by

Instrument OFF Standby ON

Red LED OFF

Yellow LED ON

Green LED OFF

2

Remove the Clamp and place inside the cabinet

Instrument in Standby mode

Red LED OFF

Yellow LED ON

Green LED OFF

 

After Completion of Un-Loading operation and decoupling of Hoses, vehicle ready for deporting. Ensure that Earth Clamp is removed from Tanker

Caution: Changes or modifications to this product not expressly approved by ESDCS, or operation of this product in any way other than as detailed by this User Manual, could void your manufacturer warranty. (Please refer to the enclosed Warranty terms & Conditions.) 

Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any form or by any means like Electronic or Mechanical, for any purpose without the express written permission of ESD CONTROL SYSTEMS, HYDERABAD.

All and any type of Damage to any part of the unit including Sub Systems supplied caused by any reason would not be covered by the manufacturer’s warranty.

Earth Interlocking System along with Weather Protection Enclosure

Model No.: EILS – 0621
Use: for Loading/Unloading of Tankers by Pumping

Description

ESD Control Systems has been manufacturing Earth Interlock Systems for solvent tanker over last 9-years. considering ease of utility and without changing the entity parameters. The working of new model is as follows.

We have observed that majority of installations the pumps used serve dual purpose of pumping in words in to storage tanks, and also to pump to utility areas, therefore it is necessary to keep all the pumps of the solvent loading area in working condition when there is no tanker present for unloading.

To achieve this purpose, the instrument when not in use, stands at standby mode where all the concerned pumps keep working normal.

Read more

When a tanker arrives at bay for unloading, the instrument can be switched on by simple ON-OFF push buttons provided on the instrument. The middle yellow colour LED which lights during standby mode turns off taking the instrument into interlock mode all the pumps turn off.

The Red LED glows and buzzer gives Bip Bip signal while the clamp is hooked on to tanker body, The earth loop checks earthing resistance of tanker body to earth pit and if it is less than 9.5-Ohms (value preset at factory as peer IS/IES to less than 10 Ohms). green LED turns on, switching the Red LED off and also turning off the biping buzzer.

Now the setup is ready for starting the unloading operation. Since the earth loop is ok for the electro-static discharge all the pumps in solvent inlet areas become normal for operation and if there is no earth fault, will continue till all the unloading is done.

Now to return to standby mode push the red colour off switch, the instrument resumes standby mode the clamp and other hose pipes can be removed.

For clarity on installation work, two drawings are enclosed in the manual.

Schematic system block diagram depicting all the inter unit wiring and earth pit connections.

The System comes with a weather protection metallic cabinet which is floor mounted

Material pre requisition list is also given in the manual.

Introduction to the Subject

Explosive atmospheres in the workplace can be caused by flammable gases, mists or vapours or by combustible dusts. Explosions can cause loss of life and serious injuries as well as significant damage.

Background

Explosive atmospheres can be caused by flammable gases, mists or by combustible dusts. If there is enough of the substance, mixed with air, then all it needs is a source of ignition to cause an explosion. Accumulated static charges on equipments and tanker while solvents are handled, readily provides this third parameter.

Explosion can cause loss of life and serious injuries as well as significant damage. Preventing releases of dangerous substances, which can create explosive atmospheres, and preventing sources of ignition are two widely used ways of reducing the risk. Using the correct equipment can greatly help this.

The Dangerous Substances and Explosive Atmospheres Regulation 2002 (DSEAR) place duties on employers to eliminate or control the risks from explosive atmospheres in the workplace. A summary of those requirements can be found below.

This page does not deal with intentional explosives such as those used in demolition work or blasting in quarries.

What is an explosive atmosphere?

An explosive atmosphere is defined as a mixture of dangerous substances with air, under atmospheric condition, in the form of gases, vapours, mist or dust in which, after ignition has occurred, combustion spreads to the entire unburned mixture. An explosive atmosphere is an accumulation of gas, mist, dust or vapor, mixed with air, which has the potential to catch fire or Explosion. An explosive atmosphere does not always result in an explosion, but if it caught fire the flames would quickly travel though it and if this happens in a confined space (e.g., in plant or equipment) the rapid spread of the flames or rise in pressure could also cause explosion atmospheric conditions are commonly referred to as ambient temperatures and pressures. That is to say temperatures of – 200C to 400C and pressures of 0.8 to 1.1 bar…

Where can explosive atmospheres be found?

Many workplaces may contain, or have activities that produce, explosive or potentially explosive atmospheres. Examples include places where work activities create or release flammable gases or vapours, such as vehicle paint spraying, or in workplaces handling fine organic dusts such as grain flour or wood, classified as Zone-1.

Liquids 

Liquids (such as petrol and other fuels) and solvents in industrial products (such as paint, ink, adhesives and cleaning fluids) give off flammable vapour which, when mixed with air, can ignite or explode. Flammable liquids are classed as:

Extremely flammable

Liquids which have a flash point lower than 00C and a boiling point (or, in the case of a boiling range, the initial boiling point) lower than or equal to 350C.

Highly flammable

Liquids which have a flash point below 210C but which are extremely flammable.

Flammable Dusts 

Dusts can be produced from many everyday materials such as coal, wood, grain, sugar, certain metals and synthetic organic chemicals. A cloud of combustible dust in the air can explode violently if ignited.

Gases 

Gases such as liquefied petroleum gas or methane. These are usually stored under pressure in cylinders and bulk containers. Uncontrolled releases can readily ignite or cause the cylinder to become a missile.

Solids 

Solids include materials such as plastic foam, packaging, and textiles which can burn fiercely and give off dense black smoke, sometimes poisonous.

SCOPE OF THIS MANUAL

This manual provides complete information of installation, operation and maintenance procedures and instructions for operating Advanced Earth Interlocking System. Read this manual before attempting to install and operate EILS – 0621.

 Each EILS–0621 System consists of the following sub components or equipment:

  •       RED, GREEN AND YELLOW Hi- Bright LED Indictors.
  •       ESD EARTH CLAMP: Exclusively designed heavy-duty Stainless-Steel Grounding clamp with Tungsten Carbide Contacts assembly with extendable spiral cable. Extendable up to 10 Meters.

OVERVIEW

EILS-0621is a system useful for controlling Static Electricity Discharges in Hazardous areas in Bulk Drug, Chemical & Pharma and other industries handling inflammable liquids, solvents and explosive propellants. This system continuously monitors Earth connectivity to ground & prevents accumulation of static electricity and discharges during tanker un-loading and loading.

EILS-0621enables or disables power supply to existing transfer pump switching system. The pumps can only be switched “ON” manually for solvent transfer if the resistance to Ground (RG) from Tanker to Earth Connection is <= 10 Ohms. And the pump will be automatically stopped if there is by any chance Earth Failure or High Resistance is detected during solvent/chemical transfer.

The EILS-0621System continuously monitors the earth connection from Tanker to Earth Connection. It has RED, GREEN, YELLOW coloured high bright LED indication systems indicating, clamp contact to tanker and earth loop check of less than 10 OHMS and STAND BY Mode RESPECTIVELY. Operator can be easily alerted to know the status of grounding during Transfer Process with this unique technology.

This unit is designed specially by incorporating Spark free switching mechanism works with intrinsically safe ultra-low voltage & current feature. This system has highly sophisticated electronic sub-assemblies populated with high performance, long lasting and most reliable components from various reputed manufacturers.

The FLP enclosure meets industry standards, made out of Cast Aluminium with flame proof design, weather proof and certified by CMRI, Dhanbad. (Please find enclosed copy of certificate) and completely integrated unit is also tested for several Physical and Electrical tests like Burn-In test, Functional Testes, Mechanical Shock, Vibration, Drop, Dump etc. as desired by Industrial Applications.

The EILS-0621is a very important system wherever hazardous material is being transferred though tankers, bulk containers etc. this system has been designed in accordance to the requirements of the industry studied and continual development over a period of 4 years.

The EILS-0621is user friendly System, very easy to install and operate and available for prompt delivery with additional accessories and alternative cabling solutions.

The EILS-0621ensures the highest possible levels of safe, positive earthing for road tanker during flammable liquid transfer operations. Unlike conventional systems, the EILS-0621provides failsafe confirmation of the static earth condition using Industrial Grade Subcomponents Electronics.

Features

EILS-0621Features: 

  • EILS-0621is completely user-friendly system with less operating procedures.
  • EILS–0621 continuously monitors and alerts about Earth connectivity or Grounding system from Tanker to Earth pit.
  • EILS-0621is a complete brake to transfer of solvents if it detects high resistance (i.e.,>= 10 Ohms.) in the earth connection to tanker ensuring safety and accident-free zone during handling of solvents.
  • EILS – 0621. By means of LED indication and buzzer, it provides status of operator to machine interface in operational sequence. During unloading alerts, the operator through Red LEDs and buzzer and automatically stops all the pumps if it detects any earth fault.  
  • EILS-0621is built by considering various International Safety Standards in the safety etc.
  • Heavy-duty Stainless-Steel Grounding clamp is designed to connect all common tankers, drums, Process Equipments etc.
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EILS-0621is useful for areas: 

  • Chemical industries.
  • Petrochemical industries.
  • Gas terminals.
  • Refineries. 
  • Aircraft refuelling systems.
  • Truck Loading terminals.
  • Harbour Bunker facilities.
  • Rail Tanker terminals etc.

Basic EILS-0621 System consists of: 

  1. Main unit consists of two compartments self-standing M.S. power coated whether proof housing. Upper white colour compartment with glass window houses the FLP enclosure and window stands at eyelevel. Blue colour lower cabinet houses the S.S. tanker clamp along with coiled P.U. tube with cable inside (stretchable up to 10 meters Length), when not in use. The door opening key is toed on to bag hook on right side under the top compartment. The clamp is taken out when clamping on to tanker.
  2. Safe area interlock unit is made of M.S, box wall mounting type and has interlock relay and pump motor control electrical out lets as shown in schematic block diagram.

Specifications

Safe Area Unit:

 

1. Mechanical

S. Fabricated enclosure. Powder-coated finish.

Wall mounted with four screws over the sidewise extended Strips with ½” holes. 

Length: – 315 mm width: – 265 mm, Height: – 140 mm. 

 2. Electrical

No. of cable entries: – 3 Nos. location bottom side 1st on left Cable Entry-1. 

1. 1.5mm² 4core flexible armored cable entry through single compression metal gland size ¾”/20mm cable. 

Termination

The finish end runs up to FLP Unit in Hazardous Area, and can be layed on existing cable tray.

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Start-end connections as follows.

1) Red 12 V DC. 

2) Black 0 V. 

3) Yellow Interlock Control 12 V.

4) Blue 0 V.

 

3. Middle position cable entry

230 Volts input. Use 1mm² 2 Core/3core PVC cable taking supply from main panel 

Electrical Specification: – 

  1. a) Power input 230Volts ±10% AC 50Hz 
  2. b) Burden less than 10 watts continuous duty. Fuse protected 

4.  Electrical Grounding: -E1-E2.

4 mm threaded hole provided on each side top extended strip. Use it for electrical grounding. 

5. Cable Entry-3

Pump Motor Control line 230 Volts Interlock control wires termination on 1 to 10 terminal blocks.

These control wires originate from built in contactor. This provides 230 V link connection for control points of respective pump motors.

The existing control feed wire (230 Volts) to be replaced with one of the wires from control points. 

FLP Unit (Hazardous Area): – 

Mechanical

  • The FLP unit is housed inside a two-door powder coat finished self-standing MS Cabinet. 
  • Location of installation:  On left side of solvent inlet pipe structure. 
  •  It is mounted on floor.

Measure and enter  

  • Height: – 1700 mm
  • Width: –370 mm
  • Length: –470 mm

Bottom door 

  • In side on left top a bracket is provided to keep clamp when not in use, the spiral cable can also be accommodated inside. 
  • Right side below top portion a bag hook is provided to place cabinet opening key. 
  • FLP unit is located in the upper part of cabinet with separate door indication LED. Window comes at eye level. 

Electrical

No. of cable entries on FLP unit:  3 Nos.

  1. cable entry-1 Bottom left side. ¾”20mm double compression metal gland to intake 4-core cable entering in to cabinet through one of the ¾” grommet on rear bottom side of cabinet. 
  2. Cable entry-2 bottom left side.8-6 size polyurethane spiral pipe clamp connection. Already done at factory using double compression metal gland.
  3. Earth pit wire connection. Cable entry-3 bottom right side. 1.5 mm² 2-core PVC cable 5-metre wire length is already connected through double compression metal gland. Other end of cable through. ¾” grommet by the side of armoured cable entry. 

This wire end is to be connected to earth pit connection point of G.I. strips. 

WARNING: Ensure that the electrical installation conforms with your local and national safety requirements. It must be connected to a suitably fused and protected electrical supply and a suitable electrical earth point.

Operating Instructions

Follow the Steps given below with same sequence to operate the instrument properly.

FOR UNLOADING THE TANKER

STEP

OPERATION

MODE

INDICATION

 

Normal Position

Stand by

Red LED OFF

Yellow LED ON

Green LED OFF

1

 

Press ON Button

(Green-Interlock)

to start

Instrument ON

Standby OFF

Interlock ON

Red LED ON

Yellow LED OFF

Green LED OFF

Buzzer – ON

2

 

Connect Clamp to the Tanker

Instrument ON

Standby OFF

Interlock ON

Red LED OFF

Yellow LED OFF

Green LED ON

Buzzer – OFF

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Interlock ON Mode: Now the tanker is grounded. Connect hose to the tanker and take all ESD.

Precautions and Switch on the Pump for Un-Loading.

After Unloading: Follow the steps given below for disconnecting Interlocking System to

Standby mode.

STEP

OPERATION

MODE

INDICATION

1

Push Red (OFF) Button

Stand by

Instrument OFF Standby ON

Red LED OFF

Yellow LED ON

Green LED OFF

2

Remove the Clamp and place inside the cabinet

Instrument in Standby mode

Red LED OFF

Yellow LED ON

Green LED OFF

 

After Completion of Un-Loading operation and decoupling of Hoses, vehicle ready for deporting. Ensure that Earth Clamp is removed from Tanker

Caution: Changes or modifications to this product not expressly approved by ESDCS, or operation of this product in any way other than as detailed by this User Manual, could void your manufacturer warranty. (Please refer to the enclosed Warranty terms & Conditions.) 

Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any form or by any means like Electronic or Mechanical, for any purpose without the express written permission of ESD CONTROL SYSTEMS, HYDERABAD.

All and any type of Damage to any part of the unit including Sub Systems supplied caused by any reason would not be covered by the manufacturer’s warranty.