MEDC BG Call Point | ATEX IECEx Explosion Proof & Hazardous Area Call Points
MEDC BG
MEDC BG are ATEX call points designed for use in the most arduous environmental conditions. The hazardous area call points, manufactured by MEDC, are manually operated fire alarms that are both simple to install and maintain in explosive atmospheres in onshore or offshore locations in accordance with the ATEX & IECEx certification and explosion protection levels.
The GRP enclosure of the hazardous area call points are suitable for use offshore or onshore where light weight combined with a high level of corrosion resistance is required.
The break glass of the ATEX call point is covered by a membrane which protects the operator from glass fragments meaning that no hammer is required to activate the unit.
A plastic ‘break glass’ or deformable operating element is available to replace the break glass. Once the flexible element is pressed it will bend but will not break.
The hazardous area call point is reset by repositioning the element.
The Eaton MEDC BG range of Zone 1 & Zone 2 call point caters for numerous options such as variety of colours, LED indication, earth continuity, double switch, etc
➡ View the complete range of MEDC call points.
ATEX Call Points Zone 1 & Zone 2
Features
Call Point Order Code MEDC BG.
- Glass Reinforced Polyester enclosure – light, strong and not subject to corrosion.
- 4 basic versions available
- (1) Explosion protected Exe (ATEX,TR CU, Chinese [CQST], Brazilian [Inmetro])
- (2) Explosion protected Exi (ATEX, IECEx, TR CU, Chinese [CQST], Brazilian [Inmetro] or CSA),
- (3) Weatherproof & Dust-tight/UL ordinary locations.
- (4) Explosion protected:
- Class I, Div. 2,
- Groups A-D
- Class II, Div. 2,
- Class I, Zone 2
- In line and end of line resistors and/or zener diodes can be fitted.
- ATEX call point available in a variety of colours.
- Up to 9 terminals available for the hazardous area call point
- Lift flap available for extra protection against inadvertent operation.
- Optional LED – this indicates that the unit has been operated – useful for testing purposes.
- Earth continuity option for metal glands.
- 1 or 2 changeover switches.
- Captive cover screws.
Hazardous Area Guide
♦ Definition : Potentially explosive atmospheres exist where there is a risk of explosion due to mixtures of gas/air, vapour/air, dust/air or other flammable combinations. Where electrical equipment has to be used in these areas, it must be so designed and constructed such that it does not create sources of ignition capable of igniting these mixtures.
♦ Area Classification : Process plants are divided into Zones (European and IEC method) or Divisions (North American method) according to the likelihood of a potentially explosive atmosphere being present. Note: North American legislation now allows Zones to be used to classify areas, where this practice is used it follows the IEC Zone method.
➡ For further information about see Hazardous Area Zones and T-Class Temperature Ratings.
European ATEX & IEC Classification | Definition of Zone or Division | North American Classification |
Zone 0 (gases) | A hazardous area in which an explosive mixture is continuously present or present for long periods | Class I Division I (gases) |
Zone 20 (dusts) | Class II Division 1 (dusts) | |
Zone 1 (gases) | A hazardous area in which an explosive mixture is likely to occur in normal operation | Class I Division 1 (gases) |
Zone 21 (dusts) | Class II Division 1 (dusts) | |
Zone 2 (gases) | A hazardous area in which an explosive mixture is not likely to occur in normal operation and if it occurs it will exist only for a short time | Class I Division 2 (gases) Class II Division 2 (dusts) |
Zone 22 (dusts) | Class III Division 1 (fibres) Class III Division 2 (fibres) |
MEDC BG Hazardous Area Manual Call Point
Technical Specification
Hazardous Area Certifications | |
ATEX Ex d | Cert. no. BAS02ATEX2105X. ATEX Approved Ex II 2GD Certified to: EN60079-0, EN60079-1, EN60079-7, EN60079-31 Ex d e IIC T6 Gb, Ex tb IIIC T85°C Db (switch only) Ex d e mb IIC T6 Gb, Ex tb IIIC T85°C Db (with LED) Ex d e mb IIC T4 Gb, Ex tb IIIC T135°C Db (with resistors & diodes) |
ATEX Ex ia | Cert no. Baseefa 03ATEX0084X. ATEX approved Ex II 1GD Certified to: EN60079-0, EN60079-11 Ex ia IIC T4 Ga, Ex ia IIIC T135°C Da |
IECEx Ex ia | Cert. no. IECEx BAS 12.0093X Certified to: IEC 60079-0, IEC 60079-11 Ex ia IIC T4 Ga, Ex ia IIIC T135°C Da |
UL | Listing no. E186629 UL listed to Class 1, Div 2. Groups A – D UL listed for ordinary locations. Listing no. S8117 |
TR CU Ex ed | 1Ex d e IIC T6 Gb, Ex tb IIIC T85°C Db (switch only) 1Ex d e mb IIC T6 Gb X, Ex tb IIIC T85°C Db X (with LED) 1Ex d e mb IIC T4 Gb X, Ex tb IIIC T135°C Db X (with resistors & diodes) Russian Fire approved (Must be red and have burning house duty label) |
TR CU Ex ia | 0Ex ia IIC T4 Ga X, Ex ia IIIC T135°C Da Russian Fire approved (Must be red and have burning house duty label) |
INMETRO Ex de | Ex d e IIC T6 Gb, Ex tb IIIC T85°C Db (switch only) Ex d e mb IIC T6 Gb, Ex tb IIIC T85°C Db (with LED) Ex d e mb IIC T4 Gb, Ex tb IIIC T135°C Db (with resistors & diodes) |
CQST Ex de | Ex d e IIC T6 Gb (switch only) Ex d e mb IIC T4 Gb (other versions) |
CQST Ex ia | Ex ia IIC T4 Ga |
CCCF | Chinese Compulsory Certification for Fire systems (CCCF). Ex de only |
SIL | SIL 2 certified to IEC 61508. Cert no. Sira 11013 |
Type approvals | American Bureau of Shipping type approval (ABS) Ex de only |
Specifications | |
Material | Anti static UV resistant glass reinforced polyester |
Finish | Red painted finish as standard or to customer specification |
Voltage | Up to 250Vac. Up to 50Vdc (model dependent) |
Weight | 1.2 kg. (varies with models and entries) |
Ingress protection | IP66 and IP67 |
Cable entries | Up to 4 entries, M16 or M20 top and bottom (1/2” NPT available on UL version) |
Terminals | 7 x 2.5sqmm – non UL standard 9 x 2.5sqmm – optional (up to 50V only) 6 x 12AWG – BGUL only |
Resistors values | Various configurations available on versions up to 24V and all ‘IS’ versions (minimum resistor value 100ΩBGE, 470ΩBGI) |
Earth continuity | Internal and external earth continuity is provided with an optional earth plate |
LED indication | A high intensity red LED can be fitted as an optional extra to indicate operation on versions up to 24V and all ‘IS’ versions As standard the LED is not provided with over current protection. The forward current (If) should be limited to 20mA |
Labelling | BG glass label – reads either (1) Fire Break glass – press here (2) Break glass – press here (3) Worded to customer requirements (7) Dot and arrows – no textDuty label – either worded to customer requirements (riveted on) or (8) Burning house logoTag label – worded to customer requirements (screwed on) |
Switch ratings | Switch only 30Vdc 5A (resistive) or 3A (inductive) 30-50Vdc 1A (resistive or inductive) 250Vac 5A (resistive or inductive)LED 24Vdc 0.05AResistor(s) 24Vdc 0.05A |
Eaton MEDC BG – Ordering Requirements
The following code is designed to help in selection of the correct MEDC hazardous area call point with ATEX approval and certification. Build up the part number of the call point by inserting the code for each component into the appropriate box.
Note: For CCCF units use the following code: BGEQF4B6B74DSA_9R. Add a code in the blank space only if resistors are required. The possible codes are C, D or S as per the options box below
How to Order | MEDC BG
BG Break Glass Manual Alarm Call Points
The following list of product variants and extras are available to order with MEDC BG type call point for safe us in hazardous areas:
BGW (Weatherproof only)
BGEB (Ex ed)
BGIB (Ex ia)
BGUL – Includes 2 metric/NPT nickel plated adaptors (UL listed)
BGUW – Includes 2 metric/NPT nickel plated adaptors (ordinary locations)
Extras
2.5mm² terminals (7 as standard, 6 on ul version, up to 9 maximum) price per extra terminal
Break glass hammer
Ex e & UL double pole switch
Ex ia, UW & weatherproof only double changeover switch
Ex i, UW & weatherproof only gold contact single changeover switch
Ex i, UW & weatherproof only gold contact double changeover switch
Internal earth plate & stud
LED – Ex e, Ex i & UL versions
LED – weatherproof only & BGUW versions
Lift flap stainless steel
Photo luminescent backplate
Resistor/diode – ex e (up to 2 off)
Resistor/diode – weatherproof, Ex ia & UL versions (up to 2 off)
Hazardous Area Accessories
MEDC TR CU, CQST, Inmetro and IECEx certified products are same price as their ATEX equivalents – contact Thorne & Derrick Sales Office for price and availability for MEDC BG2.
The following list of call point accessories are available to order for use with MEDC BG2:
Additional entries Ex d or Ex e per entry
Label (tag/duty) (special script)
Label (tag/duty) (standard script)
GRP paint finish: special (any code on the data sheets)
GRP paint finish: standard (red painted PB, BG, BG2, BG3 exempt from this)
GRP paint finish: striped
M20 or M25 Ex de IIC stainless steel plug
M20 or M25 Ex de IIC brass plug
M20 or M25 Ex de IIC nylon plug
MEDC
MEDC have developed ATEX & IECEx call points designed for harsh and hazardous area conditions and where there is a risk of explosion due to the presence of flammable atmospheres both onshore and offshore – since 1975 MEDC have been designers and manufacturers of Explosion Proof alarm, signal, control and communications equipment.
Thorne & Derrick International, based in the UK, distribute the extensive range of Eaton MEDC ATEX Certified manual call points, visual, audible alarms, loudspeakers and telephones for hazardous area workplaces, including Zone 1 & Zone 2 explosive atmospheres.