Abtech HVJB Series Инструкции по установке, эксплуатации и техническому обслуживанию - Страница 3
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INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS FOR
ABTECH 'HVJB' series – CML16ATEX3324 and IECEx CML 16.0100
earth/ground conductor brought into the enclosure must be terminated onto the enclosure internal earth/ground
stud.
Spare Conductor earthing
When spare conductors are fed into the box, either for an alternative power supply or for a spare motor, earthing
points may be fitted for the parking of those spare conductors to ensure that they are maintained at earth
potential. Such earthing points are welded to the rear face of the enclosure. All spare conductors must be
threaded underneath the cable clamping rail (if the cable is stiff it might be necessary to temporarily remove this
rail) and the phase barrier support rail and be secured using the earthing point located in the appropriate phase
bay of the enclosure. A nut and vibration resistant washer are provided and must be used. Apply torque to a
minimum of 20Nm, maximum 25Nm.
Conductor Screen Terminals
Conductor screens are most often connected to local earth inside the enclosure. Where the intermediate
connection of monitoring equipment is required additional terminals, isolated from earth, may be made available
for the individual connection of cable screens. These terminals will be of the ABTECH MV type and be secured
to an additional framework of insulating rails, as shown below. The conductors used on these terminals whether
between these terminals and the cable screens or the connecting cable to the monitoring equipment, shall be
terminated on the appropriate MV terminal stud using Cembre single hole crimp lug with palm hole suitable for
stud size M8. Refer to the MV terminal instructions ABTECH reference ABTQ-206 for further detail. The method
of securing the other end to the cable screen shall be in accordance with site engineering practice and be
suitably insulated from earth.
The return cable from the monitoring equipment shall be terminated to an appropriate earth either on or local to
the HVJB enclosure to prevent circulating earth currents.
Operation
1. The lid must be secured using all the lid screws provided in order to maintain the IP rating.
2. No attempt must be made to remove the enclosure lid whilst electrical power is connected to the contents of
the enclosure.
The earthing/grounding facility must be connected to the earth bonding circuit at all times when electrical power
is connected to the enclosure.
Maintenance
The laws of the applicable country must be considered and maintenance checks carried out accordingly.
Additional checks that are advisable to ensure the efficiency of ABTECH 'S' range enclosures on which the
HVJB is based are: -
Activity
1
Check that the lid seal is not damaged and is in place
2
Check that all lid fixing screws are in place and secured
3
Check that all gland plate fixing screws are in place and secured
4
Check that the mounting bolts are tight and free of corrosion
5
Check the security of all cable glands
6
Check the enclosure for damage
Chemical Attack
The ABTECH HVJB is manufactured from 316 stainless steel. The following additional materials are also used:
Silicone rubber,
Copper,
Brass,
Cast epoxy resin,
Glass reinforced polyester,
Nylon (polyamide),
Acrylic (polymethylmethacrylate).
Abtech Ltd.
Newhall Road, Lower Don Valley, Sheffield S9 2QJ
ABTQ-50 rev 13
Last review: 5
Frequency
Each time the enclosure is
opened
Each time the enclosure is
opened
Each time the enclosure is
opened
Annually
Annually
Annually
th
Sept 16
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