19
Direct phase rotation
The logic on which the opening and closing operations are
based requires the sequence of the primary three-phase power
supply network to follow the direct phase rotation R, S, T (A,
B, C).
Fault-making
The DS1 cannot perform a fault-making operation. For this rea-
son, the DS1 must be properly integrated into the system so as
to minimize the likelihood and impact of this event.
If necessary, contact ABB to get technical support to assess
these requirements.
5.4 Installation of fixed apparatus
5.5 Additional installation recommenda-
tions
Comply with the following recommendations when DS1 is inte-
grated into a metal-enclosed system:
• Refer to the official external drawings provided by the ABB
sales representative for positioning in the compartment and
use the base of the device to provide support. An example
is enclosed at the end of the document (Annex B).
•
Do not install the apparatus without providing a sound
support on which to fix the DS1 base mainframe.
DS1
weighs about 130 kg and during the switching process it
will produce significant vertical oscillations. An unsecure
support can lead to excessive stress on the power contact
when connected to MV bus bars.
This can cause serious malfunctions in the apparatus and
also create problems involving the fastening components of
the bus bars in the compartment (e.g. bushings, etc).
•
It is forbidden to reverse the supply side with the load side.
•
It is forbidden to install DS1 upside down.
5.6 Preliminary operations
You are strongly advised to use use type-
approved compartments able to hold the
internal arc in case of failure because the
apparatus is not designed to meet any safety
requirements in the event of faluts.
Clean the insulating parts with a clean dry rag and check that
the upper and lower terminals are clean and free from deforma-
tion caused by shocks received during transport or storage.
The apparatus can be mounted directly on the supporting
frames. The supporting frames must be on the same horizontal
plane to prevent the switch frame from becoming distorted.
Do not install the apparatus without providing a sound support
on which to fix the DS1 base mainframe.
The anchoring holes are drilled in the lower part of the frame.
Fit the isolating partitions if provided.
A minimum degree of protection (IP2X) must be guaranteed
from the front towards live parts.
It is advisable to use type-approved com-
partments able to hold the internal arc in
case of failure because the apparatus is not
designed to meet any safety requirements in
the event of faluts.
The apparatus can be mounted directly on the supporting
frames provided by the customer.
The areas on which the supporting frames are mounted must
be on the same horizontal plane to avoid any risk of distortion
in the breaker frame.
Do not install the apparatus without providing a sound support
on which to fix the DS1 base mainframe. Failure to do this can
lead to serious malfunctions in the apparatus.
Fit the isolating partitions if provided.
A minimum degree of protection (IP2X) must be guaranteed
from the front towards live parts.
Comply with the following recommendation when DS1 is inte-
grated into a compartment.
Refer to the official overall dimensions (ANNEX B) for position-
ing in the compartment and use the base of the device to pro-
vide support.
Provided
by
Northeast
Power
Systems,
Inc.
(NEPSI)
