Description; Specification; Installation - ABB MagMaster User Manual

An example of a typical label is shown below:
ABB Limited
Stonehouse, Glos. UK, GL10 3TA
MF-Series Type HA
II 2 (1) G EEx e m ia IIC T4
Baseefa03ATEX0344
(–20ºC ≤ T ≤+60ºC)(–20ºC ≤ T
a
Um-250Vrms
Voltage Rating-60Vrms
Rated current (coil drive)-0.5Amp
DO NOT OPEN WHILST ENERGIZED
Cenelec/ATEX approved MagMaster Flowmeters
for hazardous area operation are only available in
the remote version.
The hazardous area
sensors can be installed in locations defined as
CENELEC/ATEX approved Zone 1 or Zone 2: cat II
2 (1) EEx e ia m IIC T4 (–20ºC ≤ T
Higher temperature versions available depending
on the lining and construction.
The inside of the pipe is certified to Zone 0.
The must be mounted in the
transmitter
The approval is valid for the following countries:
Austria, Belgium, Denmark, Finland, France,
Germany, Ireland, Italy, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and the
United Kingdom, as a fully harmonised European
Approval which the member countries have
agreed to accept.
The sensors provide complete protection as
defined without the need to provide external zener
barriers.
Special interconnecting cables are not required for
fitting the units, as the standard MagMaster cables
are suitable for this purpose.
bonding conductor is required to comply with
.
approval

1.2 Description

The hazardous area approved MagMaster is in
nearly all respects identical to the nonhazardous
version. The only significant difference is that the
sensor termination box is larger, containing a
multiple zener barrier assembly, the operation of
which is transparent in normal use.
1 CENELEC/ATEX APPROVED FLOWMETERS...
≤+ ºC)
process liquid
MagMaster flowmeter
≤ +60°C).
a
safe area
However, a plant

1.3 Specification

This is identical to the nonhazardous area versions
except that the maximum ambient and process
temperatures may be lower. Note that the T4
(Tamb max = 60°C ) also covers T1, T2, and T3
classifications.

1.4 Installation

of a Hazardous Area MagMaster is
Installation
similar to that of the standard version described
elsewhere in this manual, but it is essential to pay
attention to the following points:
– The MagMaster transmitter must be
Transmitter
located in the safe area. It must be connected to a
single phase supply rated at no more that 240
volts. This supply must have an isolator and be
fused with an HRC fuse not exceeding 30 Amps
rating.
(HRC – HBC high rupture/breaking capacity)
– Standard or armoured MagMaster
Sensor Cable
sensor cable may be used. These cables may also
be run in conduit. The cable between the remote
.
Sensor and the Transmitter must only be that
supplied for the purpose by ABB. Other types of
cable may not be substituted, even for part runs.
Where joints between cables have to be made
(e.g. for repairs, or for junctions in panels etc.) use
only the ABB junction box (see Accessories and
Spares section). Where joints are to be made in
hazardous areas, the junction box must be
approved for this duty.
– Glands as supplied are suitable;
Glands
substitute glands or conduit fittings must conform
to Ex 'e' requirements (70°C ) and be suitable for
the cable being used.
– Connect a plant bonding conductor to
Earthing
the anti-rotation device fitted to the sensor.
To comply with approval requirements, the plant
bonding conductor or PEC (Protective earth
conductor/potential equalising conductor) must
2
be 4mm or greater, connect to the plant safety
earth (earth mat) and provide less than 1 ohm to
earth.
3