Introduction - ABB 6553 Series Instruction Manual

1 INTRODUCTION

Warning. This operating manual applies only to
those systems which have been designed and
constructed to the standards specified in the schedules of
the BASEEFA certificates listed. The separate units to
which these certificates apply are clearly identifiable by
model numbers and the data on the identification and
BASEEFA certification labels fixed to them. Other
combinations of similar equipment built to any earlier
specifications are not covered by certificate number EX
77138. This is particularly important where new
replacement units are to be incorporated into existing
installations covered
standards. If in any doubt about the installation of
particular combinations of certified equipment, please
contact the Company for advice before proceeding.
It is essential that units are installed strictly in accordance
with the appropriate standards for electrical equipment
for use in flammable atmospheres. Any deviation from the
specified installation conditions, or any unauthorized
repairs or adjustments can invalidate the safety
assurances given by the certification of the unit.
The ultimate responsibility for any particular installation lies
with the installing user/contractor.
This manual gives the installation, operating and maintenance
information for the Company's range of Model 6553
Intrinsically Safe Gas Analyzer Systems, normally used with
hydrogen cooled electrical power generators.
The complete 6553 analyzer system uses a combination of
three different units. Each unit is independently certified by
BASEEFA (EECS) for use as part of an intrinsically safe
system to the standards of SFA.3012:1972 for use in
association with Group
atmospheres. The different units of the system are:
2
by any earlier certification
IIC (hydrogen) hazardous
1) The Model 6553 Gas Monitor Unit which is available in
several options. The inputs to these units are certified to
code Ex (ia) IIC under BASEEFA certificate Ex 77124/B/S
with the unit installed in the safe area only.
2) The Model 6548-001 Katharometer Unit which forms part
of an intrinsically safe Model 6548-000 Katharometer
Analyzer Panel. The 6548-001 unit is certified to code
Ex (ia) IIC T5 under BASEEFA certificate Ex 76179/B for
installation in the hazardous area.
3) The Model 4234 constant current Power Supply Unit,
which provides a suitable supply for one katharometer unit.
These units have their output certified to code Ex (ia) IIC
under BASEEFA certificate Ex 76180/B/S for installation in
the safe area only.
The complete gas monitoring system, if installed in
accordance with the
requirements given in this manual, is itself certified intrinsically
safe to an overall code Ex (ia) IIC under the system certificate
number Ex 77138.
If further information or assistance is required, Company
specialist staff, service centres or worldwide organization may
be contacted through the most convenient address given on
the back cover of this manual. Specialist training courses can
also be arranged by our Training Centre.
certificate schedules and the