Do you already use “Best Practice standards” during loading and unloading of tankers?

Loading and unloading of oil and chemical tankers with petroleum products and inflammable liquids can create a hazardous environment. Due to the potential difference between tanker and pier (among others, by galvanic processes), sparking can occur at the connecting points of loading hoses, loading arms or other conductive equipment. To reduce this risk of energy stored in inductances, an effective equipotential bonding should be considered as additional safety measure.

SEK-3 establishes a ship to shore bonding for secured potential equalization with highest safety level in accordance to international, industrial standards like ISGOTT / ISGINTT.


  • Effective low-ohmic bonding line, especially for maritime application
  • Opening of the housing during operation in hazardous areas is allowed
  • 2 clearly visibly LEDs at the device front
  • Easy check of a proper grounding connection due to status LEDs at the grounding clamp
  • Usage under extreme environmental conditions (sturdy stainless steel housing with IP 65) and wide temperature range (-40 °C to +60 °C)
  • Over 30 years of experience with Marine Grounding Systems

Ship Grounding galvanic effect battery effect potential equalization SEK-3 Marine Grounding System
(To enlarge please click on the picture!)
  • Effective potential equalization between ship and shore prevents possible formation of sparks and hot spots
  • Highest safety by interruption of the battery effect (galvanic cell) between ship and shore
  • Automatic shut off of product flow, when grounding is interrupted
  • Explosion protection for worldwide use according to IECEx and the European ATEX directive 2014/34/EU (zone 1)
  • As absolutely essential safety component even when insulating flanges are used
  • Bridging the gap between local requirements and Industrial Standards
  • In accordance with ISGOTT / ISGINTT
  • Various control outputs, e.g. for connection to an additional status indicator to display an unsafe status
  • Marine Grounding Clamp with 2 integrated status LEDs
  • Effective failure diagnosis by integrated system information display (incl. 10 status-LEDs)
  • Object recognition of the ship
  • The electrical conductive bonding line connection between ship and shore is released, after a proper mechanical and electrical contracting is monitored
  • Detection of incorrectly connected clamp or pull off and immediately switching into safe status
Type of Protection:According to ATEX directive 2014/34/EU:
II 2 G Ex eb ib q [ib] IIB T4 Gb (SEK-3)
II 2 G Ex eb ib IIB T4 Gb (SKS-4A)
EC Type Examination (ATEX):PTB 17 ATEX 2024
IECEx Certificate:IECEx PTB 17.0036
Power Supply:110, 120, 220, 230 V ± 10 %, 50-60 Hz ca. 15 VA
type of protection “increased safety“ Ex eb IIB
Output Circuits:
Contact circuits
Max.: 250 V AC, 3 A, 100 VA
type of protection “increased safety“ Ex eb IIB
Output Circuits: Electronical CircuitsMax.: Ui = 20 V, Ii = 20 mA, Pi = 400 mW
Li und Ci negligibly small
type of protection “intrinsic safety“ Ex ib IIB
NAMUR-compatible transistor output
PA Measuring Circuit:type of protection “increased safety“ Ex eb IIB
Only for connection to cable relating to SKS-4A marine grounding clamp
Clamp Circuits:Type of protection “intrinsic safety”
Only for connection to cable relating to SKS-4A marine grounding clamp
Max. Uo = 11,2 V, Io = 475 mA, Po = 1,34 W,
Lo = 1 mH, Co = 2,7 μF
Marine Grounding Cable:Max. 50 m
SKS-4A Marine Grounding Clamp::V2A-Steel
Protection of Enclosure:IP65
Operation Temperature:- 40 °C up to + 60 °C
Dimensions (W x L x H):ca. 650 mm x 380 mm x 245 mm
Weight:ca. 25 kg (without cable and clamp)

Please get in touch with our sales department for the operating manual and the 3D CAD/.step file.

Would you like to contact us regarding offers, orders or technical advice? You can find your personal contact person under Contact.

Answers to frequently asked questions can also be found under FAQ.