abb
SafeLink
SF
6
Insulated Ring Main Unit
Installation and Operating Instructions
SLMIO ver 2.12
ABB Ltd, Switchgear Division, Auckland, New Zealand
1
1 Introduction
This manual provides all details needed to install and operate the SafeLink ring main
unit. The SafeLink unit is designed for use on distribution systems operating at up to
12kV. SafeLink is available in several configurations based on ring and fuse protected
switches: e.g. CFC, CCC, CCF; where
C
denotes a load break switch and
F
a 200A
switch-fuse combination.
SafeLink units can be supplied with direct busbar connections (D) in place of load break
switches to allow SafeLink units to be joined. For example, units configured as CFD
and DFC, when joined, will give two ring switches and two switch-fuse combinations.
Each switch is in the form of a three-position switch giving
on
,
off
and
earthed
conditions with respect to the connected cable. The status of each switch is indicated by
the symbol visible in the round hole towards the top of the mimic panel and confirmed
by the mimic diagram. Active flags in the diagram match the circuit condition with
black confirming open switches and white indicating switches that are closed. Access to
the cable box and fuse compartment is interlocked with the switch status.
The operating handle is designed to give a delay between switching operations.
Insertion of the operating handle is controlled by a rotary selector, which has one of
three possible states:
1.
Handle access blocked.
2.
Switching between
off
and
on
and switch-fuse
reset
possible.
3.
Switching between
off
and
earth
possible.
The selector handle can be padlocked in any of these three positions.
General arrangement (Figure 2) and foundation plan (Figure 3) drawings are shown on
page 4.
1.1 Technical Data
1.1.1 Physical
Data
Dimensions
(SafeLink unit with ABB Stand)
Width:
720mm
Height:
1350mm
Depth:
700mm
Weight:
250kg
Operating Conditions
Normal Ambient Temperature: -25°C to +40°C
Altitude:
Up to 1000m above sea level
Installation:
Indoor or outdoor with an enclosure
Standard indoor RMU
IP43
Mounted in Outdoor
Enclosure
IP55W
Insulating Gas
Type:
SF6 (
IEC 60376
)