background image

_______________________________________________________________________________________________________________________________ 

European Safety Systems Ltd.

   Impress House, Mansell Road, Acton, London W3 7QH 

   Tel: +44 (0)208 743 8880 

 

 [email protected]     

www.e2s.com 

  

 Fax: +44 (0)208 740 4200 

Document No. D202-00-201-IS_Issue_1                   07-05-2019 

 Sheet 6 of 8 

13) Testing unit operation

The PT call points need to have the protective flip lid opened 

first and then the main plunger pressed in. 

Fig 7 -PT Push Action 

The plunger will remain in the down/latched position until 

the unit is reset. This is done by lifting the plunger back 

up using the tool reset key provided.

 

14) Maintenance, Overhaul & Repair

Maintenance,  repair  and  overhaul  of  the  equipment  should 
only  be  carried  out  by  suitably  qualified  personnel  in 

accordance with the current relevant standards: 

To avoid a possible electrostatic charge the unit must only be 

cleaned with a damp cloth. 

Units must not be opened while an explosive atmosphere is 

present. 

EN60079-19 

IEC60079-19 

Explosive atmospheres - Equipment repair, 

overhaul and reclamation 

EN 60079-17 
IEC60079-17 

Explosive atmospheres - Electrical 
installations inspection and maintenance 

Содержание GNExCP7-PT-S

Страница 1: ...tings for US Canada The GNExCP7PT callpoints comply with the following standards UL 60079 0 2017 Ed 6 Explosive Atmospheres Part 0 Equipment General requirements UL 60079 1 2015 Ed7 Explosive Atmospheres Part 1 Equipment protection by flameproof enclosures d UL 60079 31 2012 Ed 2 Explosive Atmospheres Part 31 Equipment dust ignition protection by enclosure t The Callpoints are rated as follows Cla...

Страница 2: ... C Area Classification Dust Zone 21 Explosive dust air mixture likely to occur in normal operation Zone 22 Explosive dust air mixture not likely to occur in normal operation and if it does it will only exist for a short time Dust Groupings Group IIIA Combustible Flyings Group IIIB Non conductive Dust Group IIIC Conductive Dust Maximum Surface Temperature for Dust Applications 90ºC 135 C IP Rating ...

Страница 3: ...plosion proof Enclosure Check that the earth bonding wire between the two castings is secure and the O ring seal is in place When fitting the flameproof cover ensure the cover is sitting flat and correctly positioned on the base Insert the M6 x 50 stainless steel A4 70 Cap Head cover bolts and fully tighten down tightening torque 3 5Nm ensuring no gap is visible between the cover and base of the e...

Страница 4: ... cable glands or blanking plugs The GNExCP7 Call Point range can be supplied with the following types of adapters M20 to NPT M20 to NPT M20 to M25 It is important to note that stopping plugs cannot be fitted onto adapters only directly onto the M20 entries Any other adapters used must be suitably rated and ATEX IECEx certified adapters 10 Cable Connections Electrical Connections are to be made int...

Страница 5: ...8Vdc and limited to a maximum total power consumption no greater than 6 224W Min resistor values and current limitations must be observed depending on supply voltage and type of components fitted If a combination of resistors diodes zener diodes is used values for all components must be observed and lowest current limit for either component becomes overall limit Current limitation for units fitted...

Страница 6: ...n The plunger will remain in the down latched position until the unit is reset This is done by lifting the plunger back up using the tool reset key provided 14 Maintenance Overhaul Repair Maintenance repair and overhaul of the equipment should only be carried out by suitably qualified personnel in accordance with the current relevant standards To avoid a possible electrostatic charge the unit must...

Страница 7: ... 1 M S 2 Optional Single or Double Microswitch Circuit shown wit Unit un operated GNExCP7 UL38 PCB Version M S 1 M S 2 7 8 1 2 3 4 5 6 M S 1 7 8 M S 1 IN M S 1 OUT Series Device if fitted 1 2 3 4 5 6 M S 1 7 8 M S 1 IN M S 1 OUT EOL Device if fitted Alternative Wiring Option 2 Position for Series Device if fitted EOL Device if fitted Series Device if fitted EOL Device if fitted EOL Device if fitte...

Страница 8: ...2 3 4 5 6 M S 1 Y M S 2 1 2 3 1 2 3 SERIES DEVICE 1 RESISTOR EOL DEVICE 1 EZ1 1 2 3 1 2 3 SERIES DEVICE 2 NONE DEFAULT LINK EOL DEVICE 2 RESISTOR B R M S 1 M S 2 Example Dual Microswitch Microswitch M S 1 With EOL Zener With Series Resistor Microswitch M S 2 With EOL Resistor With no Series Device Simplified Diagram Full Circuit Diagram 1A Circuit as shown in Unoperated condition Terminals 1 3 M S...

Отзывы: