Installation and operating instruction | SafeRing/SafePlus 36kV 3
1. GENERAL DESCRIPTION
SafeRing is a SF
6
insulated ring main unit and SafePlus is a
compact switchgear for applications in medium voltage distri-
bution networks. SafeRing can be supplied as 2-, 3- or 4-way
standard configurations with additional equipment according
to customer specification.
The standard configurations are DeF, CCF, CCCF, CCFF, CCC,
CCCC, DeV, CCV, CCCV and CCVV.
SafePlus is more flexible. For SafePlus it is possible with com-
binations of C, F, V, D and De modules to fully modular and
semi-modular configurations.
Available modules are :
C - Cable switch
F - Switch fuse combination
V - Vacuum circuit breaker
D - Direct cable connection
De - Direct cable connection with earthing
M - Metering module (air-insulated)
The maximum number of modules within one SF
6
tank is
4. SafeRing and SafePlus offers a sealed stainless steel
tank which contains all the live components and switching
functions.
The transformer is protected by a switch-fuse combination or
by a vacuum circuit-breaker with relay.
The units / modules are delivered from the factory ready for
installation.
Routine tests are carried out on all units/ modules before
dispatch. No special tools are required for the installation of
units / modules.
SafeRing / SafePlus with switch fuse combination in
compliance with IEC 62271-105.
With this unit the transformer will be protected by current-
limiting HV fuses in combination with a load break switch.
The load break switch is equipped with a stored energy spring
mechanism which can be tripped by the fuse striker pin.
SafeRing / SafePlus with vacuum circuit-breaker in
compliance with IEC 62271-100
With this unit the transformers will be protected by a vacuum
circuit-breaker combined with relay and current transformers.
The standard protection relay is based on digital technology
and does not require an external power supply.
SafePlus CFV
SafeRing CCF
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