Products

Earthing Control System (Zone 1 and 2) EJB

EARTHING CONTROL SYSTEM allows safe loading and off-loading of mobile tanks (trucks, wagons , trolleys and big bags) in which flammable products are stored . The high speed process could generate electrostatic charges with possible risks of sparks and explosions. To avoid the accumulation of static electricity, the system constantly verifies the grounding connection and allows the loading process only if safety parameters are fully respected.

Unit Price:

Customers can still purchase even if there is no stocks available

Unit Of Measurement (UOM):

The Earthing Control System is housed in a GUB/GUBA or an EJB enclosure, available in copper-free aluminium alloy finished with epoxy-coating RAL 7001 or, for highly-corrosive environment, in stainless steel.

GUB/GUBA housing is suitable for the IIC Group Protection while EJB housing is suitable for II+H2 Group Protection (any gas with the sole exclusion of Acetylene). The connection to the clamp is performed through an intrinsically safe circuit.

The electronic control unit is available in different versions, covering the different applications:

  • RESISTIVE : a low resistance R is detected between the two clamp jaws;
  • RESISTIVE & CAPACITIVE : in addition to low resistance,the truck’s capacitance is also monitored.

The standard parameters of electronic control units can be adjusted on demand. The system can be equipped, upon request, with a by-pass key switch, operated only by authorized personnel, to force the CAPACITIVE mode in extreme wet conditions.

ordering code

EJB 3A-ECS

EJB 3A-ECS1

EJB 3A-ECS2

ECS System

resistive

capacitive/resistive

capacitive /resistive or resistive

material - body

aluminium alloy

overall dimensions

mm. 390 x 300 x 285

power supply

240 VAC +/- 10% - 50/60 Hz or 24 VDC +/- 20%

connections

3 brass cable glands 1/2” NPT (power supply - permissive signal - clamp)

by-pass

key contact switch

clamp

ECS - CA

ordering code

EJB 3S-ECS

EJB 3S-ECS1

EJB 3S-ECS2

ECS System

resistive

capacitive/resistive

capacitive /resistive or resistive

material - body

stainless steel

overall dimensions

mm. 390 x 300 x 265

power supply

240 VAC +/- 10% - 50/60 Hz or 24 VDC +/- 20%

connections

3 brass cable glands 1/2” NPT (power supply - permissive signal - clamp)

by-pass

key contact switch

clamp

ECS - CA

The ECS is connected to the mobile tank through an active clamp with a 10-meter length bipolar cable. The working procedure is the following:

  • the clamp is connected to the tank to be used;
  • the earthing control system measures the parameters (resistance and /or capacity) of the electrical connection loop monitoring any breaks or low values due to oxidations. It also verifies the type of connection to understand if the system is really clamped to the tank and not to other metal structures.

If all the parameters are positive:

  • a ground relay, signaled by a green LED, is switched on and remains on during loading/off-loading process;
  • two internal relays, connected with pump or valve controls, switch on;
  • the earthing connection continues to be monitored during the loading process, interrupting it immediately in case of any fault.

The Earthing Control System is housed in a GUB/GUBA or an EJB enclosure, available in copper-free aluminium alloy finished with epoxy-coating RAL 7001 or, for highly-corrosive environment, in stainless steel.

GUB/GUBA housing is suitable for the IIC Group Protection while EJB housing is suitable for II+H2 Group Protection (any gas with the sole exclusion of Acetylene). The connection to the clamp is performed through an intrinsically safe circuit.

The electronic control unit is available in different versions, covering the different applications:

  • RESISTIVE : a low resistance R is detected between the two clamp jaws;
  • RESISTIVE & CAPACITIVE : in addition to low resistance,the truck’s capacitance is also monitored.

The standard parameters of electronic control units can be adjusted on demand. The system can be equipped, upon request, with a by-pass key switch, operated only by authorized personnel, to force the CAPACITIVE mode in extreme wet conditions.

certificate number: IECEx IMQ 14.0010X      IMQ 11 ATEX 031 X      TC RU C-IT.AA87.B.00509
marking: Ex-proof Logo II 2GD Ex db [ia Ga] IIB+H2 T6 Gb     Ex tb IIIC T85°C Db
ambient temperature: –60°C +60°C
degree of protection: IP66
conformity: Directive ATEX 2014/34/EU TP TC 012/2011
standards: IEC-EN60079-0 IEC-EN60079-1 IEC-EN60079-11 IEC-EN60079-31
ГОСТ 31610.0 ГОСТ IEC 60079-1 ГОСТ 31610.11 ГОСТ Р МЭК 60079-31
category: suitable for Zone 1 - 21 (gas) and Zone 2 - 22 (dust)