ABB IS-limiter User Manual

9
The copper contacts for incoming cable
connections are connected to bottom of the
I
s
-limiter
TM
assembly which are supported by
insulator support. At the out-going side of the
I
s
-limiter
TM
assembly, the jumpers are connected
through T shaped copper connection.
The jumpers at other end are connected to
CT incoming side. These jumpers are having
insulator support at top of the panel & at front
of the panel above I
s
-limiter
TM
Inserts. The
outgoing cables are connected to the copper
contacts which are connected to the jumpers
coming from CT outgoing side.
Between each I
s
-limiter
TM
, insulating phase
barriers are provided which are fixed with steel
frame with bracket. At bottom side, phase
barriers are supported on barrier support.
LV or tripping cabinet
(Figures 3.1a, 3.5 and 3.6)
LV compartment contains the tripping device for
the I
s
-limiter
TM
and the secondary equipment in
the panel required for the particular application.
The control wiring is led through generously
dimensioned metal covered ducts in the panel
area. The left-hand duct is reserved for the
incoming and outgoing control wiring.
The internal panel wiring is located on the
right-side duct.
Warning!
In order not to alter the electromagnetic
compatibility (EMC) of the tripping device,
no additional wiring may be installed parallel to
the following connections or laid in the conduits
later date:
• connection between the movable hinged
frame (where the tripping device is located)
and the anti-interference unit
• connections between tripping current
transformers and clamps
• connections between pulse transformers and
clamps
3.4 Interlocks/protection
against maloperation
In order to avoid hazardous situations and
maloperation, a series of interlocks are provided
to protect personnel and the switchgear.
The normally effective interlocks are as follows:
• The front door of the I
s
-limiter
TM
panel can only
be opened when series connected circuit
breaker or disconnector is in open condition.
(electromechanical interlock)
• The rear covers (3 Nos.) can only be opened
when series connected circuit breaker or
disconnector is in open condition
(electromechanical interlock)
• The series connected circuit breaker can only
be closed when the I
s
-limiter
TM
switch is ready
for operation & has not tripped
(electromechanical interlock).
• If the I
s
-limiter
TM
trips, the series connected
circuit-breaker or disconnector must also be
opened.
• Details of any further interlocks can be found
in the relevant order documents for the
individual installation.

ABB IS-limiter Specifications

General

Brand	ABB
Model	IS-limiter
Category	Industrial Equipment
Language	English