ABB SafeRing User manual

NOPOWSR 5976 GB
1
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
NOPOWSR 5976 GB
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
NOPOWSR 5976 GB

NOPOWSR 5976 GB
2ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
Contents
1. General description ........................................................ 3
1.1 Table o locations .............................................................. 4
1.2 Dimensional drawings ....................................................... 5
2. Transport and handling .................................................. 6
2.1 By receiving Inspection ..................................................... 6
2.2 Storage ............................................................................. 6
3. Technical data ................................................................. 7
3.1 Electrical data ................................................................... 7
3.2 Fuse table or modules ..................................................... 8
. Installation ....................................................................... 9
4.1 Cable compartment .......................................................... 10
4.2 Cable connection .............................................................. 11
4.3 Current trans ormers or relay protection .......................... 12
4.4 Gas pressure .................................................................... 13
5. Operation ......................................................................... 13
5.1 Operating conditions ......................................................... 13
5.2 Operation .......................................................................... 14
5.3 Installation and replacement o uses ............................... 15
5.4 Relays ............................................................................... 17
6. Additional equipment ..................................................... 17
6.1 Low-voltage connections auxiliary contacts ..................... 17
6.2 Remote control and monitoring unit .................................. 17
6.3 Capacitive voltage indicator .............................................. 18
6.4 Short circuit indicator ........................................................ 18
6.5 Motor operation ................................................................. 19
6.6 Cable testing ..................................................................... 19
6.7 External busbar ................................................................. 20
6.8 Arc-suppressor .................................................................. 20
6.9 Pressure indicator ............................................................. 20
6.10 Base rame ........................................................................ 20
6.11 Ronis key interlock ............................................................ 20
6.12 Top entry box or low voltage cables ................................ 20
6.13 Low voltage compartment ................................................. 20
7. Maintenance .................................................................... 21
7.1 Control and monitoring the gas ........................................ 21
7.2 Environmental certi ication ................................................ 22

NOPOWSR 5976 GB
3
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
SafeRing / SafePlus with vacuum circuit-breaker in
compliance with IEC 60056
With this unit the trans ormer will be protected by a vacuum
circuit breaker combined with relays and current trans ormers.
The standard relays are based on digital technology and do not
require an external power supply.
Further in ormation can be ound in the product catalogue or
Sa eRing NOPOWSR 5974 GB and or Sa ePlus NOPOWSP
6004 GB.
Sa eRing is a SF6 insulated ring main unit and Sa ePlus is a
compact switchgear or applications in medium voltage
distribution networks. Sa eRing can be supplied as a 2, 3 or 4-
way standard con igurations with additional equipment
according to customer speci ication. DF, CCF, CCC, CCCF,
CCFF, DV, CCV, CCCC, CCCV, CCVV.
Sa ePlus has a unique lexibility due to its extendibility and the
possible combination o ully modular and semi modular
con igurations. Be - SL - Sv - M - C - De - D - F - V.
Sa eRing and Sa ePlus o ers a sealed stainless steel tank
which contains all the live components and switching unctions.
The trans ormer is protected either by a switch use
combination or a vacuum circuit-breaker.
The units/ modules are delivered rom the actory ready or
installation.
Routine tests are carried out on all units/ modules be ore
dispatch.
No special tools are required or installing the equipment.
Available modules are :
C - Cable switch
F - Switch use disconnector
D- Direct cable connection
De - Direct cable connection with earthing
V - Vacuum circuit breaker
SL - Busbar sectionalizer, load break switch
Busrise needed when SL on right side o SF6 tank
Sv - Busbar sectionalizer, vacuum circuit breaker
Sv always together with busrise (total width=650 mm)
Be - Busbar earthing
M - Metering cubicle
SafeRing / SafePlus with switch fuse combination in
compliance with IEC 60 20.
With this unit the trans ormer will be protected by current-limiting
HV uses in combination with a load break switch. The load
break switch is equipped with a stored spring energy
mechanism which can be tripped by the use striker pin.
1. GENERAL DESCRIPTION
Sa eRing 3 - way unit CCV
Sa ePlus 5 + 1 module with external busbar
Sa ePlus 14 modules

NOPOWSR 5976 GB
4ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
1. Li ting lugs
2. Capacitive voltage indication (additional equipment)
3. Short circuit indicator (additional equipment)
4. Pressure indicator (additional equipment)
5. Legend plate with serial number
6. Mimic diagram
7. Relay protection
8. Blown use indicator
9. Padlock device
10. Cable compartment
11. Test bushings (additional equipment)
12. Ronis key interlock (additional equipment)
13. Circuit breaker
14. Fuse switch disconnector
15. Earthing switch
16. Isolator
17. Circuit breaker open/ emergency stop
18. Circuit breaker close
19. Fuses
1.1 TABLE OF LOCATIONS
NHP 304711

NOPOWSR 5976 GB
5
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
NHP 102103
1-way 371 2-way 696 3-way 1021 4-way 1346 5-way 1671
Unit mm
1.2 Dimensional drawings

NOPOWSR 5976 GB
6ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
2. TRANSPORT AND HANDLING
The units are delivered rom the actory ready or installation.
Weight table or standard Sa eRing
2-way DV 252 kg 2-way DF 260 kg
3-way CCV 313 kg 3-way CCF 320 kg
4-way CCCV 403 kg 4-way CCCF 410 kg
4-way CCVV 411 kg 4-way CCFF 430 kg
3-way CCC 300 kg
4-way CCCC 390 kg
Sa ePlus
Standard 1-way 130 kg
2–3 and 4-way as or Sa eRing
5-way approx. between 480–600 kg
M-metering cubicle approx. 250 kg
The weights is without additional equipment
Sa eRing / Sa ePlus is itted with li ting lugs, but can also be
moved on pallets with a orkli t truck.
2.1 BY RECEIVING INSPECTION
Upon receiving the Sa eRing / Sa ePlus please check that the
delivered equipment has not been damaged during transport. I
any such damage has occurred, a claim must be submitted to
the carrier immediately.
A ter unpacking, the ollowing must be checked:
1. Operating handle – 1 piece should be included.
2. Check that the pointer on the pressure indicator is in the
green area.
3. Carry out a unction test on the mechanical parts.
Any aults or omissions must be reported immediately to the
supplier.
2.2 STORAGE
Sa eRing / Sa ePlus must be stored under cover in a dry and
well-ventilated area until it is installed and put into operation.
NHP 407789 NHP 407791
NHP 304311
NHP 408156

NOPOWSR 5976 GB
7
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
3.1 ELECTRICAL DATA
3. TECHNICAL DATA
C-module F-module V-module
SafeRing Switch Downstream Vacuum circuit
disconnector Earthing switch Switch use earthing switch breaker Earthing switch
Rated voltage kV 12/17,5/24 12/17,5/24 12/17,5/24 12//17,5/24 12/17,5/24 12/17,5/24
Power frequency withstand voltage kV 28/38/50 28/38/50 28/38/50 28/38/50 28/38/50 28/38/50
Impuls withstand voltage kV 95/95/125 95/95/125 95/95/125 95/95/125 95/95/125 95/95/125
Rated current A 630/630/630 see1200/200/200
Breaking capacities:
active load A 630/630/630
closed loop A 630/630/630
o load cable charging A 135/135/135
o load trans ormer A 20/20/20
earth ault A 200/150/150
earth ault cable charging A 115/87/87
short circuit breaking current kA see221/16/16
Making capacity kA 52,5/40/40 52,5/40/40 see212,5/12,5/12,5 52,5/40/40 52,5/40/40
Short time current 1 sec. kA 5/5/5 21/16/16
Short time current 3 sec. kA 21/16/16 21/16/16 21/16/16
C-module F-module V-module
SafePlus Switch Downstream Vacuum circuit
disconnector Earthing switch Switch use earthing switch breaker Earthing switch
Rated voltage kV 12/17,5/24 12/17,5/24 12/17,5/24 12/17,5/24 12/15/17,5/24 12/15/17,5/24
Power frequency withstand voltage kV 28 /38/50 28 /38/50 28 /38/50 28 /38/50 28/38/ 38/50 28 /38/38/50
Impuls withstand voltage kV 95/95/125 95/95/125 95/95/125 95/95/125 95/95/95/125 95/95/95/125
Rated current A 630/630/630 see1630/630/630/630
Breaking capacities:
active load A 630/630/630
closed loop A 630/630/630
o load cable charging A 135/135/135
o load trans ormer A 20/20/20
earth ault A 200/150/150
earth ault cable charging A 115/87/87
short circuit breaking current kA see221/21/16/16
Making capacity kA 62,5/52,5/52,5 62,5/52,5/52,5 see212,5/12,5/12,5 52,5/52,5/40/40 52,5/52,5/40/40
Short time current 1 sec. kA 25/-/- 25/-/- 5/5/5
Short time current 3 sec. kA 21/21/21 21/16/21 21/21/16/16 21/21/16/16
1) Depending on the current rating o the use 2) Limited by High Voltage use links
Sa ering RMU/Sa ePlus CSG is testet according to IEC publications IEC 60056, IEC 60129, IEC 60265, IEC 60298, IEC 60420 and IEC 60694

NOPOWSR 5976 GB
8ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
Ny tabell kommer
Trans ormer rating (kVA): CEF
7,2 kV 12 kV 17,5 kV 24 kV
UN (kV) 25 50 75 100 125 160 200 250 315 400 500 630 800 1000 1250 1600
3 16 25 25 40 40 50 50 80 100 125 160 160
3,3 16 25 25 40 40 50 50 63 80 100 125 160
4,15 10 16 25 25 40 40 50 50 63 80 100 125 160
51016252525404050 50 6380100160160
5,5 616162525254050 50 6380100125160
6 6 16 16 25 25 25 40 40 50 50 80 100 125 160 160
6,6 616162525254040 50 50 6380100125160
10 6 10 10 16 16 25 25 25 40 40 50 50 80 80 125 125
11 6 6 10 16 16 25 25 25 25 40 50 50 63 80 100 125
12 6 6 10 16 16 16 25 25 25 40 40 50 63 80 100 125
13,8 6 6 10 10 16 16 25 25 25 25 40 50 50 63 80 100
15 6 6 10 10 16 16 16 25 25 25 40 40 50 63 80 100
17,5 6 6 6 10 10 16 16 16 25 25 25 40 50 50 63 80
20 6 6 6 10 10 16 16 16 25 25 25 40 40 50 63 63
22 6 6 6 6 10 10 16 16 16 25 25 25 40 50 50 63
24 6 6 6 6 10 10 16 16 16 25 25 25 40 40 50 63
– The table is based on using uses type ABB CEF
– Normal operating conditions with no overload
– Ambient temperature -25°C + 40°C
100%
Trans ormer rating (kVA):
CEF
7,2 kV 12 kV 17,5 kV 24 kV
– The table is based on using uses type ABB CEF
– Normal operating conditions with 20% overload
– Ambient temperature -25°C + 40°C
UN (kV) 25 50 75 100 125 160 200 250 315 400 500 630 800 1000 1250 1600
3 16 25 25 40 40 50 63 80 100 125 160
3,3 16 25 25 40 40 50 63 80 80 100 125
4,15 10 16 25 25 40 40 50 63 80 80 100 125
51016252525404050 63 8080125160
5,5 616162525254050 50 8080100125160
6 6 16 16 25 25 25 40 40 50 63 80 100 125 160
6,6 616162525254040 50 63 8080100125
10 6 10 10 16 16 25 25 25 40 40 50 63 80 80 125
11 6 6 10 16 16 25 25 25 25 40 50 50 80 80 100 125
12 6 6 10 16 16 16 25 25 25 40 40 50 63 80 100 125
13,8 6 6 10 10 16 16 25 25 25 25 40 50 50 80 80 100
15 6 6 10 10 16 16 16 25 25 25 40 40 50 63 80 100
17,5 6 6 6 10 10 16 16 16 25 25 25 40 50 50 63 80
20 6 6 6 10 10 16 16 16 25 25 25 40 40 50 63
22 6 6 6 6 10 10 16 16 16 25 25 25 40 50 50 63
24 6 6 6 6 10 10 16 16 16 25 25 25 40 40 50 63
120%
3.2 FUSE TABLE FOR MODULES

NOPOWSR 5976 GB
9
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
. INSTALLATION
The base must be lat and itted with anchor bolts in accordance
with the dimensional drawing or the number o modules or
units as appropriate.
223427386
1-way 281 297 336 371
2-way 606 622 661 696
3-way 931 947 986 1021
4-way 1256 1272 1311 1346
5-way 1581 1597 1636 1671
Unit A B C D
NHP 102102

NOPOWSR 5976 GB
10 ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
.1 CABLE COMPARTMENT
Removal o cable cover:
NB!
The cable cover can be supplied with interlocking to earthing
switches. When interlocking is itted, the cable cabinet can only
be accessed when the earthing switch is in the closed position.
4. The panel can be removed by unscrewing A
and B.
2. Removal o ront section.
1. Loosen the screws on the cable cover,
pull out and li t cover o .
3. Front section removed.
A
B

NOPOWSR 5976 GB
11
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
.2 CABLE CONNECTION
Sa eRing/ Sa ePlus is equipped with external bushings which
comply with DIN47636T1 & T2/EDF HN 525-61 or termination o
cables.
All bushings are situated in the same height rom the loor and are
protected by the cable cover.
Type o
module
Bushings
C F V
200 series plug in X X
400 series plug in X X X
400 series bolted X XX
600 series bolted X
Cable adapters
The ollowing types are recommended:
ABB Kabeldon
ABB Kabel und Draht
Elastimold
Raychem
Cooper
3M
Please see supplier documentation or details.
The manu acturer’s installation instructions must be ollowed. Be
sure to lubricate the bushings thoroughly with the silicone supplied.
NB!
Where cables are not connected, the earthing switch must be
locked in closed position or the bushings must be fitted with
deadend recepticals before the unit is put into operation.
Sa eRing / Sa ePlus can be supplied with the ollowing bushings
or the various type o cubicle.
Adjustable cable support beam (additional equipment).
Cable support beam
Cable clamp
Earthing bar
400 S Bolt
600 S Bolt
400 S Plug
200 S Plug
NHP 408033

NOPOWSR 5976 GB
12 ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
The cable shielding is led back
through the centre hole and earthed.
.3 CURRENT TRANSFORMERS FOR
RELAY PROTECTION
Installing current trans ormers. The cable shielding is led back
through the centre hole and earthed.
A protection relay is installed in each vacuum circuit breaker
module. The cables rom the protection relay to the current
trans ormers are placed in the cable compartment, ready or
connection to the three current trans ormers supplied.
Before installation:
lCheck that the three current trans ormers have been
delivered and that they are all o the same type.
lCheck that the current trans ormers are o the correct type,
with the correctly rated trans ormer ratio, or the
distribution trans ormer’s rated current and or the
adjustment range on the protection relay (see protection
relay manual).
Each current trans ormer must be mounted onto its high voltage
cable be ore the cable termination is itted.
The earth shield on the cable must be led back through the
centre hole in the current trans ormer (see igure on le t) and
earthed on the earthing bar in the cable compartment. A
mounting plate or the current trans ormers is itted in the cable
compartment.
A ter the current trans ormers have been installed in the unit,
the cables rom the protection relay are connected. Consult the
manual supplied with the protection relay or a description o the
connections.
Sa eRing with vacuum circuit breakers are prepared or three
di erent types o protection relays: SACE PR521, SEG WI1-3
and MPRB 99-1.0-GF. All three types are designed so that
there is no need or external auxiliary voltage or correct
unctioning.
Separate manuals have been prepared or each o these
protection relay, with examples o adjustments.
SACE PR 521
This relay o ers advanced protection with acilities or constant-
time, normal inverse, very inverse and extremely inverse
characteristics as well as simple earth ault protection in
accordance with IEC 60255-3.
MPRB 99-1.0-GF and SEG WI1-3
These are simpler type o inverse-time protection relays, with
ixed settings specially developed or distribution
trans ormers.The MPRB 99-1.0-GF also have a earth ault
protection module.
It is essential or correct unctioning that the current trans or-
mers are properly connected and that the protection relay is
properly adjusted.
Sa ePlus can be delivered with advanced protection relays. As
option SPAJ140 can be delivered and also other ABB relays
like REJ and REF54_ can be itted. This will require additional
low voltage compartment.
See separate documentation or these relays.
NHP 304712

NOPOWSR 5976 GB
13
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
. GAS PRESSURE
Sa eRing / Sa ePlus contains SF6 gas with a nominal pressure
o 1.4 bar at 20o C.
Sa eRing/ Sa ePlus is «sealed or li e» and is itted with a
temperature-compensated pressure indicator.
A temperature-compensated device that emits an electrical signal
to indicate lower pressure can be supplied on request.
Pointer in green area - unit has correct pressure
Pointer in red area - pressure is too low
5. OPERATION
5.1 OPERATING CONDITIONS
Normal ambient conditions
Sa eRing / Sa ePlus is generally equipped or operation/service
in normal indoor conditions in accordance with IEC 60694.
The ollowing limitations apply:
Ambient temperature
Max. temperature +40°C
Max. temperature (24-hour average) +35°C
Min. temperature - 25°C
Humidity
Max. average relative humidity
measured over 24 hours 95%
Max. average relative humidity
measured over 1 month 90%
Max height above sea level or
installation without reducing gas pressure 1,000 metres
Special conditions
In accordance with IEC 60694, the manu acturer and end-user
must agree about special operating conditions which deviate
rom operation under normal conditions.
The manu acturer/supplier must be consulted in advance i
especially di icult operating conditions are involved. When
electrical equipment is installed at more than 1,000 metres
above sea level, or example, the atmospheric pressure will be
lower and the overpressure in the tank will have to be reduced.
Airfreight
Units / modules delivered with redused overpressure - see
procedure for refilling.
NHP 408025
NOTE! Screw/unscrew
on this hexagonal nut only
Filling
pressure
mbar
SF
6
Air
1500
1400
1300
900 925 950 975 1000 1025 1050 1075 1100
Atm.
pressure
mbar
30°
25°
20°
15°
10°
ambient temp.
Refilling of SF6 gas in SafeRing/SafePlus
Following equipment is needed gas bottle with manometer and reduction
valve adapter pressure measuring device
1. Remove ront cover and unscrew manometer as shown.
2. Screw (tightening the torque.45 Nm) the adapter to the valve.
3. Be ore connecting the hose rom the gas bottle to the adapter, the air in
the hose must be removed by running SF6 gas through the hose.
4. When gas is lowing into the RMU/switchgear, the manometer on the
gas bottle has to be observed. When it shows 0.4 bar at ambient
temperature 20° Celsius, (1,4 bar absolute) the gas illing must be
stopped. See table or illing pressure above.
5. Remove the illing hose and connect the pressure device to check the
pressure inside the RMU/switchgear.
6. When the correct pressure o 0.4 bar (1,4 bar absolute) is obtained,
remove the adapter and screw with tightening torque 45 Nm the
manometer to the RMU/switchgear as shown above.
Observe that the sealing between the manometer and the valve is
smooth and clean.
Valve

NOPOWSR 5976 GB
14 ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
5.2 OPERATION
All switches can be operated with the included operating
handle.
Internal mechanical interlocking between the switch
disconnector/isolator and the associated earthing switches
prevents incorrect operation.
The isolator in the V-Module can only be opened a ter the
circuit breaker is opened. Then the circuit breaker can be
closed or testing purpose.The operation o the switch
disconnector/circuit breaker and earthing switches can be
urther interlocked by means o a padlock. The earthing
switches are operated by a snap action mechanism, which
ensures ast closing.
The earthing switch is closed by turning the operating handle
clockwise. Turning the operating handle anti-clockwise opens
the switch.
For closing the switch use disconnector / circuit breaker the
spring mechanism must be charged. Turning the operating
handle clockwise does this. Then the green “on” button must be
pressed to close the switch/breaker.
An anti-re lex system, standard on all operating handles,
prevents the immediate re-operation o switches.
Switch disconnector:
Close: Turn the operating handle clockwise.
Open: Turn the operating handle anti-clockwise.
Earthing switch:
Close: Turn the operating handle clockwise.
Open: Turn the operating handle anti-clockwise.
Switch fuse disconnector.
Close: Turn the operating handle clockwise to charge the
close/open spring. Then push the green button. (A)
Open: Push the red button. (B)
In circuit breaker con igurations, the trans ormer circuit breaker
can be tripped by the protection relay, while in switch use
con igurations use switch disconnector can be triggered by the
use striker pin i an over current or short-circuit occurs.
Mechanical position indicators:
C: Switch use disconnector D: Earthing switch closed
E: Isolator closed
C
A
E
D
B
V-Module
F-Module

NOPOWSR 5976 GB
15
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
5.3 INSTALLATION AND
REPLACEMENT
OF FUSES
A red indicator below the use symbol on the
lower ront panel indicates a use trip. Fuses
are replaced as shown in the sequence o
illustrations. Switch use con igurations are
supplied without uses installed.
When installing fuses for the first time,
follow the sequence of illustrations 1-9.
2. Close earthing switch by turning
operating handle clockwise.
5. Applying the operating handle and turning anti-clockwise
opens the use canisters.
1. Fuse trip indicator.
3. Unscrew use cover.
4. Tilt out the usepanel to gain access
to use canisters.

NOPOWSR 5976 GB
16 ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
7. Fix the uses to the use cover using the contact screw
- The striker must point out rom the use canister or
the use to unction properly.
Fuse
Striker
9. Close the use panel.
The switches are ready or operation.
8. Turn the handle on the use cover clockwise to
close and seal the use canister. Use the operating
handle.
6. Pull out the use handle. The uses are irmly ixed in the
use cover.
Fasten the contact
screw on the
locking ring.

NOPOWSR 5976 GB
17
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
6.1 LOW-VOLTAGE CONNECTIONS
AUXILIARY CONTACTS
(2NO+2NC) can be supplied to indicate switch positions on all
switches/breakers. Access to the low-voltage connections is
gained by removing the top ront panel. A shunt trip coil (AC or
DC) can be itted on the trans ormer switch/breaker.
6.2 REMOTE CONTROL AND MONITORING UNIT
Sa eRing can be equipped with an integrated remote control and
monitoring unit (see picture le t).
This unit is preengineered and can be delivered and installed as
a retro it solution or complete rom actory.
Sa ePlus can have the same equipment but need an additional
low voltage compartment on top o the switchgear.
6. ADDITIONAL EQUIPMENT
5. RELEAYS
Sa eRing / Sa ePlus with vacuum circuit breakers are prepared
or three di erent types o protection relays: SACE PR521,
Circutor, MPRB 99-1.0-GF and SEG WI1-3. All three types are
designed so that there is no need or external auxiliary voltage
or correct unctioning.
Separate manuals have been prepared or each o these
protection relay, with examples o adjustments.
MPRB 99-1.0-GF and SEG WI1-3
These are simpler type o inverse-time protection relays, with
ixed settings specially developed or distribution
trans ormers.The MPRB 99-1.0-GF also have an earth ault
protection module.
Sa ePlus can be delivered with advanced protection relays. As
option SPAJ140 can be delivered and also other ABB relays
like REJ and REF can be itted. This will require additional low
voltage compartment.
See separat documentation or these relays.

NOPOWSR 5976 GB
18 ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
6.3 CAPACITIVE VOLTAGE INDICATION
Socket or capacitive voltage ondication
HR-module IEC 61243-5
Phase balance check
Capacitive voltage indicator type CATU
Voltage indicator
6. SHORT CIRCUIT INDICATOR
Three types can be supplied:
Horstman ALPHA-M
Horstman ALPHA-E
Horstman GAMMA
Vim 1
Vim 3

NOPOWSR 5976 GB
19
ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
6.6 CABLE TESTING
Voltage testing and locating cable aults can be per ormed in
two ways:
6.5 MOTOR OPERATION
Cable switches, vacuum circuit-breakers and earthing switches
are operated by mechanisms located behind the ront panel.
The mechanisms or all the switches and breakers are operated
manually with the operating level (standard), or are itted with
motor operation (additional equipment). The earthing switch can
only be operated manually and is itted with mechanisms to
achieve ault making capabilities.
Motor operation can be easily retro itted. 2. Directly at the cable connectors which are designed or
testing the voltage o the cable.
Follow the supplier’s instructions.
2.1. Cable connector connected
2.2. Cable connector dismounted
1. Directly at the testing points (A) i they are itted on the
unit. Proceed as ollows: engage the earthing switch.
Connect the testing equipment on top o the testing points
which hold the earth bar (B). Remove the earth bar and
per orm the test. Re it the earth strip be ore the testing
equipment is disconnected
NHP 304708

NOPOWSR 5976 GB
20 ABB / PTMV
SafeRing / SafePlus
SF6 insulated ring main unit and compact switchgear
Installation and operating instructions
6.7 External busbar
Sa eRing and Sa ePlus can be equiped with an external busbar.
See seperate instruction manual NOPOWSP 6006 GB.
6.8 ARC-SUPPRESSOR
An arc-suppressor can be itted on all cable modules or
Sa eRing and C, D, De and V-modules on Sa ePlus. They must
be ordered together with the unit and cannot be retro itted.
The tripped o an arc-suppressor is indicated by means o a
electric contact in the SF6 tank, wired to the terminal strip
behind the top ront panel. (This requires aux. voltage supply.)
6.9 PRESSURE INDICATOR
Sa eRing / Sa ePlus is always supplied with a pressure
indicator in the orm o a manometer. Additionally it is possible
to it device or an electric signal i the pressure is low. This
requires aux. voltage supply.
6.10 BASE FRAME
Sa eRing/ Sa ePlus can be installed on a separate base rame.
The base rame is designed or cable entry rom both sides or
rom the back.
Two di erent heights 290 mm and 450 mm.
6.11 RONIS KEY INTERLOCK
Sa eRing / Sa ePlus can be supplied with a RONIS, EL 11 AP
key interlocking system or breakers, switches and earthing
switches
6.12 TOP ENTRY BOX FOR LOW VOLTAGE
CABLES
Sa eRing/Sa ePlus can be supplied with top entry box or low
voltage cables.
6.13 LOW VOLTAGE COMPARTMENT
Sa ePlus can be supplied with low voltage compartment or
protection relays, metering and other secondary equipment.
Base rame
Top entry box low voltage cables
Sa ePlus with
Low voltage compartment