Areva WS Series User manual

AREVA T&D
Technical Instructions
WS
Gas-Insulated switchgear
up to 36 kV
Operating Instructions
No. AGS 531 591-01
Edition 09/06
>>
GAS-INSULATED SWITCHGEAR

IMPORTANT NOTE
Only the specific written Technical Instructions supplied by AREVA with the equipment must be used.
Our products must only be commissioned, operated, serviced, repaired or decommissioned in accordance
with Technical Instructions which have been supplied with the product in question by the manufacturer.
This electronic version of the Technical Instructions is provided to the customer for information purposes only.
The equipment must not be commissioned, operated, serviced, repaired or decommissioned on the basis of
this electronic version.
Non-compliance with this instruction may result in serious damage to the product and its associated items,
as well as a health hazard or mortal danger. AREVA shall not be held liable for any such consequences.
AREVA T&D
Worldwide Contact Centre
http://www.areva-td.com/contactcentre/
℡[phone]
Manufacturer:
AREVA Energietechnik GmbH
Sachsenwerk Medium Voltage
Rathenaustrasse 2
D-93055 Regensburg, Germany
℡+49 (0) 9 41 / 46 20-0

+49 (0) 9 41 / 46 20-418
Service:
Should you have any queries as to
our service, please do not hesitate
to contact:
AREVA Energietechnik GmbH
Sachsenwerk Medium Voltage
Service-Center
D-93055 Regensburg, Germany
℡+49 (0) 9 41 / 46 20-777

+49 (0) 9 41 / 46 20-778
©-2006-AREVA Energietechnik GmbH - Sachsenwerk Medium Voltage

3
1 Regulations and provisions 4
1.1 Introduction 4
1.2 Terms and symbols used 4
1.3 Use in line with the intended purpose 4
1.4 Applied standards 5
1.5 Safety provisions 6
1.6 Disposal after the end of the useful life 6
2 Technical data, control and
operating devices 7
2.1 Type designation 7
2.2 Control and operating devices 7
2.3 Technical data for electrical control and
operating devices 8
3 Variant overview 10
3.1 Single busbar panel WSA 10
3.2 Double busbar panel WSB 13
4 Insulating gas, monitoring 16
4.1 General data 16
4.2 Pressure gauge 17
4.3 IGIS 17
5 Voltage detection systems 18
5.1 Integrated Voltage Detecting System IVIS 18
5.2 Pluggable voltage detection system 18
5.3 Phase monitors 18
6 Operation 19
6.1 Operator interfaces 19
6.2 Interlocks 20
6.3 Switching (circuit breaker,
disconnector, earthing switch) 23
6.4 Standard switching operations 26
6.5 Earthing the busbar 27
6.6 Bus sectionalizer 28
6.7 Disconnecting the voltage transformer 29
7 Fan attachment 30
8 Cable test 31
9 Servicing 32
9.1 General 32
9.2 Servicing schedule 32
9.3 Lubrication instructions 33
9.4 Max. number of breaking operations for
the vacuum chambers 38
10 Annex 39
10.1 Auxiliary products 39
10.2 Accessories 39
Contents
>>

4
1.1 Introduction
These Technical Instructions de-
scribe the operation of gas-insulated
WS medium-voltage switchgear.
These instructions are an integral
part of the product. It must be made
available at any time to the persons
who work on the switchgear. If the
switchgear is ever relocated, it must
be accompanied by this documenta-
tion.
The following additional documents
for this switchgear must be ob-
served:
•Purchase contract with the agree-
ments on the configuration of the
switchgear and with the legal
details
•Installation Instructions
•the contract specific switchgear
circuit diagrams / documentation
•the Operating Instructions of the
devices installed in the switchgear
(e.g. IVIS, devices in low-voltage
cabinet)
•the Instructions for Assembly pro-
vided by the manufacturer of the
cable connection systems to be
connected to the switchgear
•the System Configuration “WS”
•the Technical Instructions “Use
and handling of insulating gas”
for WS (can be requested as
required).
As our products are subject to conti-
nuous further development, we
reserve the right to make changes
regarding standards, illustrations and
technical data.
1.2 Terms and symbols
used
This manual uses certain symbols
which warn about dangers or pro-
vide important information which
must be observed to avoid danger to
personnel and damage to equip-
ment:
Warning!
This symbol warns of
dangerous electrical
voltage. Contact with
live parts may result in fatal
injury!
Warning!
This symbol indicates
important instructions.
Non-compliance may
result in serious injury, death
or damage to the equipment.
Important!
This symbol is used for
information which is impor-
tant to avoid damage.
1.3 Use in accordance
with the intended
purpose
WS gas-insulated medium-voltage
switchgear units are exclusively
intended for switching and distribu-
ting electrical power. They may only
be used in the scope of the speci-
fied standards and the appropriate
switchgear-specific technical data.
Any other use constitutes improper
use and may result in dangers and
damage.
Disclaimer of liability
The manufacturer shall not be held
responsible for damage which
occurs if:
•instructions in this manual are not
complied with,
•the switchgear is not operated
according to its intended use
(see above),
•the switchgear is assembled,
connected or operated improperly,
•accessories or spare parts are
used which have not been appro-
ved by the manufacturer,
•the switchgear is modified without
the manufacturer’s approval, or if
inadmissible parts are attached.
No liability is accepted for parts pro-
vided by customers, e.g. current
transformers.
1 Regulations and provisions
>>

5
1.4 Applied standards
WS switchgear units are
•metal-enclosed
•SF6insulated
•type-tested
•tested for internal arc faults
WS switchgear may only be opera-
ted under normal operating conditi-
ons according to the specifications
EN 60694 or the IEC Publication
60694.
Operation under conditions deviating
from these is only admissible upon
consultation with and approved by
the manufacturer.
Ambient conditions (acc. to IEC 60 694)
Temperature class ”Minus 5 indoors” 3)
Min./max. ambient temperature °C -5 / 40 3)
Average value over 24 hours (max.) °C ≤ 35 3)
Average rel. air humidity: 24 h / 1 month % ≤ 95 / ≤ 90 3)
Max. installation altitude above sea level m ≤ 1,000 3)
3) Higher values possible on request
4) See section 4
Insulating gas (acc. to IEC 60 376)
Type Sulphurhexafluorid (SF6)
Rated pressure pre at 20 °C MPa 0.03-0.075 4)
Environmental and operating conditions
Degree of protection against
accidental contact and
foreign objects
(acc. IEC 60529)
Main electric circuits IP65
Drives IP2X 1)
Low-voltage cabinet IP3X 1)
Cable connection
compartment IP3X 2)
1) optional IP 52
2) optional
Designation IEC standard EN standard
Switchgear IEC 62271-200 EN 62271-200
IEC 60694 EN 60694
Behaviour in case of internal arc faults IEC 60298 EN 60298
Circuit-breaker IEC 62271-100 EN 62271-100
Earthing switch IEC 62271-102 EN 62271-102
Disconnector IEC 62271-102 EN 62271-102
Current transformer IEC 60044-1 EN 60044-1
Voltage transformer IEC 60044-2 EN 60044-2
Voltage detection systems IEC 61243-5 EN 61243-5
Protection against accidental
contact, foreign objects and water IEC 60529 EN 60529
Installation IEC 61936-1 HD 637 S1
Operation of electrical equipment – EN 50110
WS switchgear units meet the following standards and regulations:

6
1.5 Safety provisions
The user shall ensure that the work
described in this manual is carried
out only by the manufacturer's Ser-
vice Centre staff, or by personnel
qualified and authorized to assemble
and test WS switchgear.
Read these instructions carefully
before starting work on the switch-
gear, and perform the work detailed
in them as described. Do not per-
form any work on the switchgear
panel which is not described in this
technical instruction.
Applicable standards and
regulations:
Please comply with:
•the locally applicable health and
safety, operating and work in-
structions
•Installation:
IEC 61936-1 / HD 637 S1
•Operation of electrical installa-
tions EN 50110-1
Important!
Operating reliability and
useful life depend on correct
operation.
Before performing work on the
panel, make sure to comply with the
following instructions:
Warning!
Before starting work on
the high-voltage com-
ponents, de-energize
the system, verify it for zero
voltage and earth the system
according to the applicable
safety rules pursuant to
EN 50110-1.
Warning!
After removal of covers,
operator safety acc. to
IEC 60298 may be
restricted if the appropriate
part of the switchgear unit has
not been isolated from the
power supply.
Warning!
Before performing work
on the drives, switch off
the auxiliary circuit and
prevent it from reclosing.
Warning!
There is a risk of injury
when working on the
drive mechanism.
Release the circuit-breaker’s
energy storing device by per-
forming the corresponding
•OFF-ON-OFF operating
sequence.
•in case of a make-proof
earthing switch, by the
appropriate ON-operation.
Action in the event of incidents or
accidents
The WS switchgear panels feature
pressure relief ports for the case of
an internal arc fault; these ensure
operator safety according to
IEC 60298.
In the event of fire or of internal
faults, substances hazardous to
health and toxic or caustic decom-
position products of the insulating
gas may develop. Comply with the
locally applicable accident and
safety provisions.
In the event of injury to personnel,
ensure that appropriate first-aid
measures are taken.
1.6 Disposal at the end
of service life
The following documents can be
provided on request for the disposal
of WS switchgear at the end of their
service lives:
- Technical Instruction “Use and
handling of insulating gas SF6"
- Material and utilization data sheet
Disposal at the end of the service life
is performed as a service by the
Service Center at the manufacturer's
which is subject to a fee.

7
Fig. 2.1
Name plate on the operating panel
(front side) of the switchgear panel
1 Type designation
2 Serial number
3 Year of manufacture
4 Rating (see also IEC 62271-200)
2 Technical data
>>
2.1 Type designation
The type designation of the switch-
gear panels - see name plate -
informs about
•design
•rated peak withstand current
•rated voltage
•dimensions
Example WSA 6 / 36 - 2 / 6 23
Series WS
Single busbar A
Double busbar B
Rated peak withstand current 60 kA
Rated voltage 36 kV
Rated lightning impulse
withstand voltage 170 kV
Dimensions:
Panel width 600 mm
Panel height 2,300 mm
1
23
4
In case of queries and orders for
spare parts, the following data on
the name plate must be specified:
- Type designation
- Serial number
- Year of manufacture
2.2 Ratings for Switchgear WS
Rated voltage Ur[kV] 12 17.5 24 36
Rated lightning impulse withstand voltage Up[kV] 75 95 125 170
Rated short-duration power-frequency withstand voltage Ud[kV] 28 38 50 70
Rated normal current busbar Irmax. [A] 2,500
Rated normal current feeder Irmax. [A] 2,500
Rated peak withstand current Ip max. [kA] 82
Rated short-circuit breaking current Isc max. [kA] 31.5
Rated short-time withstand current Ikmax. [kA] 31.5 ( 3 s)
Rated frequency fr[Hz] 50/60

8
2.3 Technical data for
electrical control and
operating devices
The switchgear panels have been
designed on principle for manual
operation.
The drive mechanisms of the indi-
vidual switching devices can be
equipped, depending on the specific
customer's model, with additional
electrical control and operating de-
vices. These are characterized in the
switchgear-specific circuit diagram
(see switchgear documentation).
Component fitting options:
Motor
•for charging the energy-storing
device (closing spring)
•for actuation of the disconnector
and earthing switch
Closing release
•1 unit
Opening release
•max. 2 units
Secondary release
(CT-powered release)
•max. 2 units
•(Maximum equipment – opening
release and secondary release,
3 units in total)
Undervoltage release
•1 unit
Blocking coil
Blocking coils prevent the circuit
breaker from being closed and
opened via the mechanical push-
buttons “ON“ or “OFF“, as well as
actuation of the interlocking levers of
the disconnectors and earthing swit-
ches.
Times for releases and motor
Minimum tripping command duration
for release 160 W [ms] 20
for release 25 W [ms] 50
minimum closing command duration [ms] 20
Motor charging time [s] ≤ 12
Overview rated supply voltages
DC voltage: [V] 24 / 48 / 60 / 110 / 125 / 220
AC voltage: [V] (110) 120 / (220) / 230
Power consumption, solenoids and motor
Power consumption
DC AC 50/60 Hz
approx. [W] approx. [VA]
Closing release 160 160
Opening release without
auxiliary spring energy store 160 160
Opening release with
auxiliary spring energy store 25 25
Undervoltage release 15 15
CT-powered release – 12
Blocking coil 12 12
Motor 200 - 250 200 - 250
Please enquire at the manufacturer’s for details of the motor’s starting current.
The auxiliary voltage data is required to this effect.

9
Adjustment of Auxiliary Switches
Auxiliary switches are always actua-
ted directly by the switch shaft via an
intermediate linkage. Their position
always corresponds to that of the
main contacts.
Please take current adjustment of
auxiliary switches from the latest
revision of switchboard's LV sche-
matics.
Adjustable cams are enabling inivi-
dually setting of switching perfor-
mance. Setting should only be car-
ried out by a specialist who is used
to the installed auxiliary switches.
Auxiliary switches may not be disas-
sembled.
Fig. 2.2
Setting the cams of the auxiliary switch
Cam
Viewing direction
for adjustment
Rated supply voltage DC
Switching capacity
Time constant T=L/R
Rated short-time current
[V]
[A]
24
8
[ms] ≤ 20
100 A for a duration of 30 ms
48
4
60
3
110
2
220
1
Rated continuous current [A] 10
AC
120
10
230
10
–
Auxiliary switch

10
3 Variant overview
>>
Fig. 3.1
1 Drive with front control panel
2 Circuit-breaker compartment
3 Busbar tank with disconnector and earthing switch
4 Supporting structure with cable connection area
5 Low voltage cabinet
7 Cable test sockets
8 IVIS voltage indicator
3.1 Single busbar panel WSA
7
4
5
8
2
3
1

11
Basic modules of a
single busbar WSA switchgear
Circuit-breaker panel
- Circuit-breaker
- Disconnecting / earthing
switch
- Toroidal-core current trans-
former
- Multi-cable connection
- disconnectable, flange-
mounted voltage transfor-
mers with primary fuse
protection (on request in
case of 36 kV)
Circuit-breaker panel
- Circuit-breaker
- Disconnecting /
earthing switch
- Toroidal-core current
transformer
- Single cable connection
Circuit-breaker panel
- Circuit-breaker
- Disconnecting / earthing
switch
- Toroidal-core current
transformer
- Multi-cable connection
- disconne table, flange-
mounted voltage trans-
formers
Circuit-breaker panel
- Circuit-breaker
- Disconnecting / earthing
switch
- Toroidal-core current
transformer
- Single cable connection
- disconnectable, flange-
mounted voltage trans-
formers on the busbar
Bus section coupler
- Circuit-breaker
- Disconnecting / earthing
switch
- Toroidal-core current
transformer
- lower busbar tie connec-
tion in gas-filled compart-
ment
Bus sectionalizer
with disconnector in the
busbar run

12
Basic modules of a
single busbar WSA switchgear
End panel
Cable connection in
downward direction
for inner cone-type bushings
size 1 – 3, or fully insulated
conductor bar terminal
End panel
Cable connection in
upward direction
for inner cone-type bushings
size 1 – 3, or fully insulated
conductor bar terminal
Busbar metering panel
with current transformers in
the busbar run
Busbar metering panel
with current transformers in
the busbar run and metal-
enclosed voltage transfor-
mers in feeder panel area,
connected via cable
Busbar earthing
with earthing switch in the
busbar run
1 Cable connection
and earthing for work
purposes on the
busbar, e.g. for
metal-enclosed bus-
bar voltage trans-
formers or cable
connections. Inner
cone-type bushings,
size 1 or 2
2 Fully insulated con-
ductor bar terminal
forward, to busbar
ends
12

13
Fig. 3.2
1 Drive with front control panel
2 Tank with circuit breaker
3 Busbar tank 1 with disconnector and earthing switch
4 Busbar tank 2 with disconnector
5 Supporting structure and cable connection
6 Low voltage cabinet
7 Cable test sockets
8 IVIS voltage indicator
3.2 Double busbar panel WSB
1
2
1
8
6
2
4
3
7
5

14
Circuit-breaker panel
- Circuit-breaker
- Disconnecting /
earthing switch
- Toroidal-core current
transformer
- Single cable connection
Circuit-breaker panel
- Circuit-breaker
- Disconnecting /
earthing switch
- Toroidal-core current
transformer
- Multi-cable connection
- disconnectable, flange-
mounted voltage transfor-
mers
Circuit-breaker panel
- Circuit-breaker
- Disconnecting /
earthing switch
- Toroidal-core current
transformer
- Multi-cable connection
- disconnectable, flange-
mounted voltage transfor-
mers with primary fuse pro-
tection (on request in case
of 36 kV)
Bus coupler
- Circuit-breaker
- Disconnecting /
earthing switch
- Toroidal-core current
transformer
- lower busbar tie connec-
tion in gas-filled compart-
ment
Bus coupler in
single-panel width with
- Circuit-breaker
- Disconnecting /
earthing switch
- Toroidal-core current
transformer
- up to max. 1250 A
Bus section coupler
lower busbar
(upper busbar analogously)
- Circuit-breaker
- Disconnecting /
earthing switch
- Toroidal-core current
transformer
Basic modules of a
double busbar WSB switchgear

15
Circuit-breaker panel
- Circuit-breaker
- Disconnecting /
earthing switch
- Toroidal-core current
transformer
- Single cable connection
- disconnectable, flange-
mounted voltage transfor-
mers on the busbar
Basic modules of a
double busbar WSB switchgear
Bus sectionalizer
with disconnector in the
busbar run
End panel
Cable connection in
downward and upward
connection, depending
on the busbar position,
for inner cone-type
bushings, size 1 – 3,
or fully insulated conductor
bar terminal
Busbar metering panel
with current transformers in
the busbar run and metal-
enclosed voltage transfor-
mers in feeder panel area,
connected via cable
Busbar earthing
with earthing switch in the
busbar run
1 Cable connection and
earthing for work purpo-
ses on the busbar, e.g.
for metal-enclosed bus-
bar voltage transformers
or cable connections.
Inner cone-type bus-
hings, size 1 or 2
2 Fully insulated conduc-
tor bar terminal forward,
to busbar ends
12
12

16
4.1 Technical data
Type of insulating gas:
Sulfur hexafluoride SF6according
to IEC 60376.
The tanks of the switchgear have
been designed as “Sealed Pressure
System“ as defined by the IEC publi-
cation 62271-200. Thanks to the
design of the “Sealed Pressure
System”, the insulating gas contents
do not require any maintenance.
During the expected service life, no
gas handling will be required under
normal operating conditions acc. to
IEC 60694.
For further details on this aspect,
also refer to the Technical Instruction
“Use and handling of insulating gas”
for WS panels, which is available on
request.
4 Insulating gas, monitoring
>>
Rated pressure and pickup values of pressure gauge / IGIS
Rated voltage [kV] 12/24 12/24 36 36
Rated
(normal) current [A] ≤1,250 >1,250 ≤1,250 >1,250
Rated pressure [MPa] 0.030 0.075 0.05 0.075
Pre-alarm in case of
a drop in pressure [MPa] 0.019 0.062 0.037 0.062
Main alarm in case of
a drop in pressure [MPa] 0.014 0.057 0.032 0.057
Important!
The switchgear-specific gas
compartment diagram must
be complied with.
Measures to be taken at the various warning thresholds
1) Refer to the instructions for the “Use and handling of insulating gas“ for WS
2) These values apply for an insulating gas temperature of 20 °C. The insulating properties may be impaired after a certain period due to penetrating
ambient air.
Warning threshold
Pre-alarm in case of a drop
in pressure
(signalling contact 1)
Main alarm in case of drop in
pressure (signalling contact 2)
Insulating gas pressure has
decreased to atmospheric
pressure
Maßnahmen
Replenish insulating gas 1)
Contact the manufacturer.
In case of a main alarm, isolate
the switchgear compartment in
question!
Contact the manufacturer.
Dielectric state of the gas compartment
The insulating level is not restricted up to
the warning threshold “main warning” and
corresponds to the data on the rating plate.
Reduced insulating level
Switchgear Insulating level 2)
rated voltage Ur
12 kV Rated lightning impulse
withstand voltage 75 kV
17.5 kV Rated lightning impulse
24 kV withstand voltage 95 kV
36 kV Rated lightning impulse
withstand voltage 145 kV

17
4.3 IGIS
IGIS measures the pressure of an
integrated gas compartment and the
temperature within the switchgear
room in order to determine the tem-
perature-compensated insulating gas
pressure.
This temperature-compensated insu-
lating gas pressure is the insulating
gas pressure at a switchgear com-
partment temperature of 20 °C. In
line with the concept of integrated
gas compartments, it is a measure
which indicates the insulating level of
the switchgear.
The number of the channels for the
pressure transmitters and the confi-
gured pickup values are specifically
designed for the corresponding gas-
insulated switchgear.
Wichtig!
Comply with the IGIS
Operating Manual,
AGS 531 741-01.
4.2 Pressure gauge
The pressure indication on the pres-
sure gauge is ambient-temperature
compensated, i.e. the pressure indi-
cated corresponds to a temperature
of 20°C in the switchroom. The
pressure indication remains constant
if the operating mode remains
unchanged, even if the temperature
in the switchgear room changes.
123
4
12
12
Fig. 4.2
Insulating gas monitoring with individual monitoring of the circuit-breaker compartments and
integrated monitoring of the busbar compartment (example)
1 Pressure gauge for circuit-breaker compartment
2 Gas connector socket for circuit-breaker compartment M24 x 1.5 (DIN6)
3 Pressure gauge for busbar compartment
4 Gas connector socket for busbar compartment M24 x 1.5 (DIN6)
P2
P3
P1 Test
P1
P2
P3
P< bar
I G I S
P1
1
2
3
4
Fig. 4.3
1 Busbar compartment 2
2 Busbar compartment 1
3 Circuit-breaker compartments
4 IGIS
Gas-tight electrical bushing
Pressure transmitter
Check valve
Double check valve
Gas connector
Fig. 4.1
Indicator 1 Pressure gauge
1 Signalling contact 1
2 Signalling contact 2
3 Pressure indication
3
21
Signalling contact Switching function
1 closes if pre-alarm is reached during drop in pressure
2 closes if main alarm is reached during drop in pressure

18
5 Voltage Detecting Systems (VDS)
>>
5.1 Integrated Voltage
Detecting System
IVIS
IVIS is an integrated voltage detec-
ting system with an integrated dis-
play unit used to determine zero vol-
tage / line voltage according to
IEC 61243-5.
The IVIS system has been designed
for maximum operating reliability. It
does not require supply from an
external source. It features climate-
proof encapsulated electronics and
is maintenance-free, due to perma-
nent monitoring of the indication
thresholds.
Flash arrow symbols on the indica-
tors display the mains voltage still
existing within the defined response
thresholds (Fig. 5.1). The IVIS
system does not require the electri-
cal repeat tests common for voltage
detection systems.
Important!
For a description of all
functions and messages of
the IVIS system, please refer
to the separate Operating Manual
"IVIS“ (No. AGS 531 751-01).
5.2 Pluggable voltage
detection system
The line voltage or the zero voltage
state of the feeder panels
is detected via a separate voltage
detection system according to
IEC 61243-5. Socket-contacts for
the indicators are located on the
panel front as well as on the rear
side of the panel (Fig. 4.3). Capaci-
tive voltage indicators of all the
approved manufacturers can be
used (Fig. 4.2).
Important!
Comply with the manufac-
turer's Operating Manual of
the voltage indicators used.
Important!
All three phases L1, L2 and
L3 must always be checked
together.
Close non-used socket-contacts
using a cap.
Warning!
The indicators must not
be plugged in at the
front and rear simulta-
neously (offset response limits).
5.3 Phase monitors
Important!
Before connecting live
switchgear components for
the first time, always check
phase coincidence.
If IVIS is used, phase comparison
can be performed by means of the
phase monitor MS 100 (Fig. 4.5).
Fig. 5.2
Voltage indicator unit (HR-ST)
Manufacturer: Horstmann GmbH
Fig. 5.3
Socket-contacts for HR system
Fig. 5.1
1 IVIS display on the panel rear side;
the IVIS display on the panel front is in the
low-voltage cabinet
4Fig. 5.2
Phase monitor for HR system, type ORION
3.0 (manufacturer: Horstmann GmbH)
Fig. 5.5
Phase monitor MS 100
1

19
6.1 Operator interfaces
for WSA (single busbar) and WSB (double busbar)
6 Operation
>>
Fig. 6.1
Example: WSA operator interface
(feeder panel with single busbar)
Example: WSB operator interface
(feeder panel with double busbar)
Insertion opening
Energy-storing device – manual operation
Circuit-breaker:
Status indicator of the energy-storing device
Position indicator
ON button
OFF button
Earthing switch:
Interrogating lever
Switch position indicator
Insertion opening for switch operation
Disconnector:
Interrogating lever
Switch position indicator
Insertion opening for switch operation
Mechanical lock-out
Circuit-breaker operations counter
8
7
Important!
All the information about
double busbar switchgear
is subject to the following
determination as regards the
position of the busbars.
7: Busbar 1
(corresponds to the lower
busbar tank)
8: Busbar 2
(corresponds to the upper
busbar tank)
Different, switchgear-specific deter-
minations must be taken into con-
sideration accordingly.
5
2
1
6
3
4
5
2
1
6
3
4
4
1
2
3
4
5
6

20
6.2 Interlocks
Warning!
Complete switchgear
interlocking can only
be ensured with com-
plete locking devices.
Warning!
Regarding the imple-
mentation of the inter-
locking systematics,
the purchase contract and the
switchgear-specific circuit dia-
gram must be complied with!
Internal mechanical interlocks
of the panel
•Only one interrogating lever (“dis-
connector“ or “earthing switch“)
can be actuated at the same time.
•The cranks for the disconnectors
and earthing switches can only be
removed in their appropriate end
positions.
•The earthing switch can only be
actuated in direction ON with the
circuit-breaker’s energy storing
device charged (intertripping
circuit of circuit-breaker during
earthing, see sect. 6.3). When the
energy-storing device is not char-
ged, direction reversal from OFF
to ON is prevented during the
OFF actuation.
•When the crank for actuation of
disconnector or earthing switches
has not been removed, or if the
interrogating lever has been
actuated, the circuit-breaker can-
not be switched ON. (Push-but-
ton ON cannot be pressed or the
ON pulse is interrupted. This also
applies for couplers).
Electromagnetic interlocks
Electro-magnetic blocking coils
prevent, depending on the switching
position, actuation of the interro-
gating levers and of the ON/OFF
buttons of the circuit-breaker.
Important!
In case of failure of the
supply voltage, all electro-
magnetic interlocks are in
their "locked" position.
Measure:
Re-establish the supply voltage.
Mechanical lock-out mechanism with cylinder lock (optional)
Turn key Key Actuations on front
control panels
clockwise removable actuation not possible *)
counter-clockwise not removable actuation possible
*) In the case of feeder panels, the circuit-breaker button “OFF” can be actuated
Fig. 6.2
Interlocks in case of switching operations
Interrogating lever
cannot be actuated
Button cannot
be pressed
Crank cannot be
turned
Mechanical lock-out
Mechanical lock-out mechanism
with padlocks (optional)
Fig. 6.3
1 Interlock flap for push-button
2 Opening for padlock
2
1
2