General Description - Siemens SDR 15.5 kV Instruction Manual

6

General description

Recloser principle and design
Reclosers are used in distribution systems.
Like circuit breakers, reclosers are used to
make and break normal and fault currents.
Reclosers are fully equipped with sensors
and a controller to provide a means of
protection and control. In case of a line
fault, reclosers can break and make currents
several times, thus avoiding longer network
interruptions due to temporary faults.
Type SDR vacuum reclosers are outdoor
devices designed for repeated opening and
reclosing in case of a fault, as specified in
ANSI/IEEE standard C37.60.
The vacuum recloser consists of two main
components: the recloser switch and the
controller.
This instruction manual covers information
related to the recloser switch unit and the
controller. The instruction manual does not
cover the switch unit mounting frame,
control and protection relay or related
accessories (for example, surge arresters,
external voltage sensors, modems or
radios).
For information pertinent to the mounting
frame for the switch unit, refer to the frame
installation drawing provided with the order
specific drawings.
For information pertinent to the control and
protection relay, refer to the manufacturer's
instruction manuals.
The manufacture, design and testing of the
vacuum recloser is based on current
regulations and standards and state-of-the-
art technology. The product conforms to the
following standards:
ANSI/IEEE C37.60/IEC 62271-111
IEC 60255-11
IEC 60255-21-1 Class I
IEC 60255-21-2 Class I
IEC 60255-21-3 Class I
IEC 60255-22-1 Class III
IEC 60255-22-2 Class IV
IEC 60255-22-3 Class III
IEC 60255-22-4 Class IV
IEC 60255-22-5
IEC 60255-22-6
IEC 60255-25
IEC 60255-5
IEC 62271-1
Note: IEEE C37.60 and IEC 62271-111 are the
same document (dual logo IEEE and IEC).