Competence in Switchgear EngineeringFrom
Southern Harz* to Bangkok
(*Harz is a low mountain range in Germany.)
| For the reliable operation of low-voltage substations, the
circuit-breakers - being the essential safety devices - must not fail. ABB’s
switchgear engineering programme produces two series of circuit-breakers for universal use
in low-voltage distribution systems, meeting almost all customers’ requirements. |
|
Compact !
... is the word to describe the circuit-breakers in the SACE
Isomax S series. Its seven sizes, Isomax S1 to Isomax S7,
offer solutions for rated continuous currents from 125A to 1600A, with short-circuit
breaking capacities from 25 kA to 200 kA, 400 V AC. These versions
fixed, plug-in and draw-out - offer versatile application possibilities, which are
extended still further by their modular construction, with conversion kits creating the
prerequisites for a great variety of versions. The Isomax S series
of compact circuit-breakers also offers an extensive range of accessories, e.g. with
open-circuit shunt releases and undervoltage releases. This also includes auxiliary switch
breaks with different combinations of auxiliary contacts and trip indication. Electrical
drives, which can also be filled retrospectively, enable the Isomax
circuit-breakers to be operated by remote control. The circuit-breakers, of three-pole or
four-pole design, are fitted with a rocker lever, but they can also be made with a rotary
handle on the circuit-breaker or on the panel door. By virtue of three further SACE Isomax
models, this versatile circuit-breaker can also be used for direct-current applications
from 10 A to 800 A at voltages of up to 750 V DC.
Intelligent !
... is the word to describe the SACE Emax
low-voltage circuit-breakers, by virtue of the microprocessor-controlled releases
PR 111 and PR 112 specially developed for them.
The SACE Emax series consists of five circuit-breaker models, E1,
E2, E3, E4 and E6,
with only four different dimensions for all sizes, with all the SACE Emax
circuit-breakers having the same overall height and overall depth. Being of modular
construction, the series offers an extremely high degree of flexibility, particularly
since the same accessories can be used for all the circuit-breakers. What is more, the
same components make different functions possible. For example, the same trip-coils can be
used for alternating current and direct current, and the shunt release and closing release
are also identical. With their resistance to mechanical, electrical and thermal stresses,
the Emax series can be used as circuit-breakers, as fixed or draw-out
disconnectors, for rated currents from 800 A to 6300 A with a breaking capacity
from 40 kA to 150 kA. A high short-circuit breaking capacity, double insulation,
IP54 enclosure rating, circuit-breaker draw-out even with the panel door closed, and the
fitting of accessories without the risk of an error/fault, - all this represents
comprehensive safety/security.
Approval by most ships’ classification companies stands for
international use.
Convinced !
South Harz Hospital at Nordhausen
|
...This is
what all those involved in erecting the low-voltage substations for the South Harz
Hospital at Nordhausen in Thüringen (Germany) were, for example, with regard to the
performance of the SACE Isomax and SACE Emax
circuit-breakers.
In adding a new block to the hospital, space is to be provided for a children’s
clinic, neurology department, women’s clinic, radiation therapy, operating-theatre
wing, intensive-care unit, administrative area and medical technology centre. |
Planned by the M. and D.
Gnuse Engineering Office of Erfurt and executed by the firm EAB Schmidt,
Nordhausen, the central power supply of the Nordhausen South Harz Hospital is to
be through an ABB UNI-KIT low-voltage substation with 30 bays/circuits in three
blocks.
Open-type circuit-breakers SACE Emax E3 2500 A are used
for the incoming feeder to each block. The outgoing feeders are equipped with compact
circuit-breakers SACE Isomax S7 1000 A, Isomax S5
400 A and SlimLine SR-E fuse blocks. The state of the
installation - including the measurement of relevant current and power data - is signalled
to the central building services control system by a connected DDC system.
|
"Convinced" also applies to the firm
EHB Schaltanlagen of Pyrbaum in the Upper Palatinate [Oberpfalz] when they were
installing the main low-voltage distribution system for the new CITY-POINT Shopping Centre
in Nuremberg. The low-voltage substation was equipped with SACE Isomax
and SACE Emax circuit-breakers, as well as with Slim-Line blocks.
The advantages and characteristics of the ABB switchgear contributed greatly to the
Nuremberg Shopping Centre being able to open on time on 26th February 1999,
after an extremely short construction time. |
CITY-POINT Shopping
Centre at Nuremburg. |
|
Isomax compact circuit-breakers for power supply authority in Bangkok,
Thailand. |
"Convinced" also applies to the firm
of Piller of Mechernich, which equipped the Lahmayer compact substations on the
low-voltage side with 76 SACE Isomax compact circuit breakers S3
to S7. The substations were destined for a power supply undertaking in
Bangkok, Thailand. |
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| © 1999 ABB Schalt- und
Steuerungstechnik GmbH Heidelberg |
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