Medium Voltage Switching Devices
EI SC
Indoor earthing switch 12-36 kV
Assembly and Maintenance Instructions
No. AGS 531 986-01
Edition 05/2011
www.schneider-electric.com
EI SC
Contents
Remarks on this manual.............................................................................. 4
Purpose and target group............................................................................................ 4
Reference documents................................................................................................. 4
Terms and symbols used............................................................................................. 4
Any questions or suggestions?................................................................................... 5
1
Safety provisions............................................................................... 6
2
Variants and technical data............................................................... 7
3
Transport, delivery, storage............................................................ 16
4
Assembly.......................................................................................... 17
5
Drives for the EI SC series.............................................................. 21
6
High-voltage terminal...................................................................... 24
7
Commissioning................................................................................ 25
8
Maintenance..................................................................................... 26
9
Annex................................................................................................ 28
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
3.1
3.2
3.3
3.4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
7.1
7.2
8.1
8.2
8.3
8.4
8.5
9.1
9.2
9.3
AGS 531 986-01 | Edition 05/2011
Design and function......................................................................................... 7
Special models (optional)................................................................................. 9
Technical data................................................................................................ 10
Standards and regulations applied................................................................. 10
Ambient and operating conditions.................................................................. 10
Technical data for electrical control and operating devices . ..........................11
Nameplate...................................................................................................... 12
Dimensions.................................................................................................... 13
Intended use.................................................................................................. 15
Disposal at the end of service life.................................................................. 15
Shipping units................................................................................................. 16
Transport with forklift truck............................................................................. 16
Delivery.......................................................................................................... 16
Storage........................................................................................................... 16
Safety provisions and instructions for assembly............................................ 17
State as delivered.......................................................................................... 17
Transport by means of a crane...................................................................... 18
Changing the drive side (optional)................................................................. 18
Installation positions....................................................................................... 19
Fastening....................................................................................................... 20
Earth terminal................................................................................................. 20
Checking assembly........................................................................................ 25
Performing switching tests............................................................................. 25
Servicing and maintenance instructions......................................................... 26
Cleaning insulating components.................................................................... 27
Avoiding condensation................................................................................... 27
Corrosion protection....................................................................................... 27
Lubrication instructions.................................................................................. 27
Auxiliary products........................................................................................... 28
How to treat firmly screw-connected contact surfaces................................... 28
Specifications for screw connections............................................................. 29
3
EI SC
Remarks on this manual
As our products are subject to continuous further development, we reserve the right
to make changes regarding the standards, illustrations and technical data.
For reasons of clarity, simplified views are partially used.
All dimensions specified in this manual are in millimeters.
Purpose and target group
This Technical Manual describes design, assembly and maintenance or indoor earthing switches of the EI SC type in indoor medium-voltage switchgear.
The work described in this manual may only be performed by specialist electricians
with proven experience in conjunction with
■■
the EI SC earthing switch
■■
all relevant safety provisions
This Technical Manual is an integral part of the product and must be stored so that
it is readily accessible at all times for and can be used by persons who are to work
on the earthing switch. If the earthing switch or a panel equipped with this earthing switch is sold to new owners, these must receive this document along with the
switch or panel.
This Technical Manual cannot describe every imaginable individual case or every
customer-specific version of the product. For information which is not included in this
manual, please contact the manufacturer.
Reference documents
The following additional documents must be observed for the handling of this device:
■■
purchase agreement with the stipulations regarding the switch-specific equipment and the legal details
■■
the Assembly and Operating Instructions of the separate drives of the earthing
switch:
––
■■
Manual drive mechanism STA 2 (No. AGS 531 992-01)
–– Motor-operated drive mechanism GM 3-1 (No. AGS 531 997-01)
the technical documentation (Assembly/Operating Instructions) of the switchgear into which the earthing switch is installed or to be installed
Terms and symbols used
This Technical Manual uses certain terms and symbols. They warn about dangers or
provide important information which must be complied with in order to avoid danger
to persons and damage to equipment:
"Danger!"
This danger symbol warns about dangerous electrical voltage.
Contact with voltage may result in fatal injury!
"Warning!"
This danger symbol warns about the risk of injury. Please comply
with all the provisions identified by this symbol in order to avoid
death or serious injury.
"Important:"
This instruction symbol is used for information which is important to
avoid material damage.
4
AGS 531 986-01 | Edition 05/2011
EI SC
Remarks on this manual
Any questions or suggestions?
Do you have any questions or suggestions regarding this manual, or do you require
further information?
We always strive to provide you with the best-possible information for optimum, safe
use of our products. Thus, do not hesitate to contact us if you have any recommendations, amendments or proposals for improvement.
AGS 531 986-01 | Edition 05/2011
5
EI SC
1
Safety provisions
The work described in this manual may only be performed by specialist electricians
with proven experience in conjunction with the EI SC series and the applicable
safety provisions.
Read the instructions carefully before you work on the earthing switch.
Applicable standards and
regulations
■■
Common specifications for high-voltage switchgear and controlgear: IEC
62271-1
■■
The locally applicable accident prevention, operating and work instructions
must be complied with.
■■
Installation: IEC 61936-1/HD 637 S11
■■
Operation of electrical equipment: EN 50110-11
The national standards applicable in the country where the equipment is to be
installed must be complied with.
1
Behaviour in case of incidents or
accidents
6
In case of fire or of internal faults, toxic and caustic decomposition products may be
produced. Comply with the locally applicable accident and safety provisions.
Make sure that first-aid measures are taken in case of injury to persons.
AGS 531 986-01 | Edition 05/2011
2
EI SC
2.1
Variants and technical data
Design and function
11
10
9
8
1
7
2
3
4
5
Fig. 1
Schematic view of the earthing switch EI SC
1 Frame with fastening bore-holes
7
2 Operating shaft
8
3 High-voltage terminal
9
4 Contact blades
5 Auxiliary switch (optional)
6 Snap-closing mechanism
6
Drive lever QW6
Spring pack
Post insulator
10 Earth terminal, screw M12 (Earthing
switches with a pole center spacing
≥ 210 mm are equipped with two
earth terminals)
11 Nameplate
Fig. 2
Earthing switch EI SC with double contact blades
AGS 531 986-01 | Edition 05/2011
7
EI SC
2
Variants and technical data
1
75º
Switching function
Earthing switches of the EI SC series are equipped with a snap-closing mechanism.
This ensures that the closing speed required for closing in case of a short-circuit is
reached independently of the operating speed.
2
Contact blades and drive levers have an operating angle of 90°.
On switching "on", the drive lever performs an idle movement of approx. 75° (Fig. 3).
Subsequently, the shaft is taken along. Once the dead centre has been passed, the
spring pack actuates the snap-closing mechanism (Fig. 4).
On switching "off", the contact blades are taken along immediately and the spring
pack is recharged simultaneously.
1
75º
2
8
Fig. 3
Drive lever (1), turned up to 75º; contact blades (2) have not tripped yet
Fig. 4
Snap-closing mechanism actuated
Fig. 5
Earthing switch OFF
Fig. 6
Earthing switch ON
AGS 531 986-01 | Edition 05/2011
EI SC
2
2.2
Variants and technical data
Special models (optional)
Optional attachments
1
2
3
Fig. 7
1 Pole partitions (optional depending on the ratings)
2 Blocking coil
Capacitive divider-insulator
The HV terminals are checked for zero voltage and/or phase coincidence acc. to
IEC 61243-5 with integrated (e. g. IVIS, Fig. 9) or non-integrated voltage detecting
systems.
The electrical properties and dielectric strengths of the capacitive divider-insulators
(Fig. 8) correspond to those of conventional post insulators; they have a short,
screw-fastened connection cable and are suitable for connection to both high-resistance and low-resistance systems according to the relevant standard.
For detailed information regarding the voltage detecting system IVIS, please contact
the manufacturer.
Fig. 8
Capacitive divider-insulator
AGS 531 986-01 | Edition 05/2011
Fig. 9
Integrated Voltage Detecting System
IVIS
9
EI SC
2
Variants and technical data
2.3
Technical data
Rated voltage Ur
[kV]
12
17,5
24
36
Rated lightning impulse withstand voltage
Up
[kV
75
95
125
170
Rated short-time power
frequency withstand voltage Ud
[kV]
28
38
50
70
Rated short-time current Ik
[kA]
Rated short-circuit duration tk
Rated peak withstand current Ip
Rated short-circuit making current Ima
Rated frequency fr
251/31,52
[s]
1
[kA]
631/802
[Hz]
Weight (without drives; see Chapter 5)
1
2
The earthing switch EI SC is:
501/632
50
Electrical endurance class
Phase spacing
201/252
E1
165
175
210
215
250
[mm]
[kg]
210
165
210
215
250
275
300
≤ 30
350
370
400
460
≤ 40
with single contact blade
with double contact blade
2.4
Standards and regulations applied
■■
type-tested
■■
designed for indoor switchgear units
Series EI SC earthing switches comply with the following standards and regulations:
Switching devices
Standard
Common specification for high-voltage switching devices
IEC 62271-1
Earthing switch
IEC 62271-102
2.5
Ambient and operating conditions
The EI SC series switches are indoor switching devices and may only be operated
under normal operating conditions acc. to IEC 62271-1. Operation under conditions
deviating from these is only admissible upon consultation with and with the written
approval of the manufacturer.
Ambient conditions (in accordance with IEC 62271-1)
"minus 25 indoors"1
Temperature class
1
10
Ambient temperature min./max.
°C
–25/+401
Average value over 24 hours
°C
≤ 351
mean rel. air humidity: 24 hours/1 month
%
≤ 95/≤90
Installation altitude above sea level
m
≤ 10001
other values available on request
AGS 531 986-01 | Edition 05/2011
EI SC
2
Variants and technical data
2.6
Technical data for electrical control and operating
devices
On principle, the earthing switch is designed for manual operation. The drive mechanisms can be equipped with electrical control and operating devices, depending on
the specific customer's model .
Auxiliary switch (HS 3)
Permit direct control of releases, blocking coils and motor-operated drives. Auxiliary
switches are always actuated directly by the switch shaft via an intermediate linkage. Their position always corresponds to that of the main contacts.
VDC
[V]
24
48
60
110
220
Switching capacity
[A]
8
4
3
2
1
Rated short-time current
120
230
10
100 A/30 ms
Time factor T = L/R
[ms]
Rated continuous current
Variants available for the
auxiliary switch HS 3
VAC
Rated supply
voltage
≤ 20
[A]
–
10
11
23
31
43
51
63
71
83
91
103 111
123
12
24
32
44
52
64
72
84
92
104 112
124
HS 3/2
HS 3/4
HS 3/6
HS 3/10
HS 3/12
Fig. 10
Circuit diagram and item of apparatus designation of the auxiliary switches HS 3/2 to
HS 3/12
(2-/4-/6-/10-/12-pole)
Blocking coil (Y1)
Prevents actuation of the earthing switch. Only after the armature has been actuated
is manual actuation enabled and the ON or OFF operations can be performed. In
case of failure of the power supply, all blocking coils are in their "locked" position.
Power consumption: approx. 12 W/VA
Motor-operated drive (GM 3-1)
Overview of rated supply
voltages
AGS 531 986-01 | Edition 05/2011
see separate Manual AGS 531997-01.
Overview of rated supply voltages
Direct voltage DC
[V]
Alternating voltage AC
[V]
24
48
120
60
110
220
230
11
EI SC
2
Variants and technical data
2.7
Nameplate
The type designation of the earthing switch on the nameplate (Fig. 11) specifies essential technical data. It is explained using the following example:
1
2
3
4
Fig. 11
Nameplate of the earthing switch EI SC
1 Type designation
2 Serial number
3 Year of construction
4 Technical data
EI SC1 /
24
/
63 / 275
Earthing switch EI SC
Rated voltage 24 kV
Peak withstand current 63 kA
Phase spacing 275 mm
(T = with partition attachment)
When submitting enquiries to the manufacturer or when ordering spare parts, the
following information is required:
■■ Type designation
12
■■
Serial number
■■
Year of construction
AGS 531 986-01 | Edition 05/2011
2
EI SC
2.8
Variants and technical data
Dimensions
(further dimensional diagrams available on request)
28
150
e
205
74
120
40
14
39
d
c
I1*
º
90
a
b
I
c
60
Fig. 12
Dimensions of earthing switch EI SC with single contact blades and rated peak withstand current 63 or 50 kA
Type EI SC
(without capacitive post
insulators)
12/63/1651
a
b
c
d
e
440
490
165
281
340
12/63/2101
12/63/2151
12/63/2501
17,5/63/210
24/63/165
24/63/2101
24/63/2501
24/63/2751
24/63/3001
36/50/370
36/50/4001
460
590
590
690
590
440
590
690
750
740
940
1000
510
640
640
740
640
490
640
740
800
790
990
1050
175
210
215
250
210
165
210
250
275
300
370
400
281
281
281
281
326
361
361
361
361
361
476
476
340
340
340
340
386
421
421
421
421
421
534
534
36/50/460
1120
1170
460
476
534
a
b
c
d
e
12/63/1751
Type EI SC
(with capacitive post insulators)
12/63/150
12/63/1651
12/63/2102
12/63/2151
24/63/2101
24/63/250
24/63/275
24/63/300
1
I1
short
medium
long
short
medium
long
283
333
365
539
593
623
483
483
483
483
365
483
533
550
743
743
743
743
539
743
850
850
383
383
383
383
283
383
433
483
also available with red blades
AGS 531 986-01 | Edition 05/2011
490
490
490
640
640
740
800
790
2
165
165
165
215
210
250
275
300
281
281
281
281
361
361
361
361
340
340
340
340
421
421
421
421
333
433
433
433
333
433
483
533
533
550
750
750
593
743
743
743
593
743
850
955
955
1100
750
medium
433
483
1495
1495
I
long
288
383
850
850
850
850
623
850
955
955
1495
I1
short
440
440
440
590
590
690
750
740
I
short
medium
long
556
333
433
433
433
533
533
483
483
533
743
850
850
593
743
743
743
850
850
955
955
955
only available with red blades
13
2
EI SC
Variants and technical data
28
e
150
205
74
120
14
40
39
d
c
c
I1*
º
90
a
b
I
60
Fig. 13
Dimensions earthing switch EI SC with double contact blades and rated peak withstand current 80 or 63 kA
Type EI SC
(without
capacitive
post insulators)
12/80/165
12/80/210
12/80/250
17,5/80/210
24/80/275
24/80/300
36/63/350
36/63/370
36/63/400
36/63/425
Type EI SC
(with capacitive post insulators)
12/80/210
12/80/250
24/80/275
14
a
b
c
d
e
520
590
690
590
750
740
940
940
1000
1050
560
640
740
640
800
790
990
990
1050
1100
165
210
250
210
275
300
350
370
400
460
281
281
281
326
361
361
476
476
476
476
340
340
340
386
421
421
534
534
534
534
a
b
c
d
e
I1*
short
medium
383
383
383
483
433
433
433
533
550
640
740
800
210
250
275
281
281
361
340
340
421
long
383
483
483
483
short
medium
743
743
743
850
743
850
743
955
550
1100
750
750
750
483
long
743
850
850
850
1100
1495
1495
1495
I1*
short
590
690
750
I
I
medium
long
433
433
533
483
short
850
medium
long
743
850
955
850
AGS 531 986-01 | Edition 05/2011
EI SC
2
Variants and technical data
Motor-operated drive GM 3-1
(optional) attached
40,5
789
674
100
m
Fig. 14
Dimensions, attachment of motor drive mechanism GM 3-1
Rated voltage Ur
[kV]
Dimension m
mm
2.9
12
17,5
171
24
36
206
Intended use
EI SC series earthing switches are exclusively designed for earthing and short-circuiting of parts of a circuit in indoor switchgear units. They may only be used in the
scope of the specified standards, of the switchgear-specific technical data and of the
application types specified in this manual. Any other utilization constitutes improper
use and may result in danger and damage.
Disclaimer of liability
The manufacturer shall not be held responsible for damage which occurs if
■■ instructions in this Technical Manual are not complied with;
■■
the earthing switch EI SC is not operated according to its intended use (see
above);
■■
the earthing switch EI SC is assembled, connected or operated improperly;
■■
accessories or spare parts are used which have not been approved by the
manufacturer;
■■
the earthing switch EI SC is converted without the manufacturer’s approval, or
if inadmissible parts are added.
2.10 Disposal at the end of service life
Disposal is performed as a service by the manufacturer’s Service Center and is
subject to a fee. For further information, please contact the manufacturer.
AGS 531 986-01 | Edition 05/2011
15
EI SC
3
Transport, delivery, storage
3.1
Shipping units
The conditions and types of transport have been stipulated in the contract details.
The type of packaging depends on the type of transport and the storage conditions.
The earthing switches are delivered ready for connection. The accessories are
included.
Packaging
■■
If earthing switches are exclusively transported by truck, they are delivered on
a pallet, packaged in cardboard boxes or PE protective film, depending on their
outside dimensions.
■■
For sea transport, the units are packed in sealed aluminium foil with desiccant
and in a wooden case or cardboard box (also for container transport).
■■
In case of air transport, the units are either packed in cardboard boxes on a pallet or in wooden crates with PE film.
3.2
Transport with forklift truck
The packing units may only be transported complete with pallet. Move the
forks completely under the whole pallet.
The earthing switch must be fixed safely
on the pallet.
Fig. 15
Transport with forklift truck
3.3
Delivery
■■
Handle shipping units carefully when unloading and unpacking them.
■■
Shipping units must be checked upon receipt. Any damage which may have
occurred in transit must be recorded and reported to the manufacturer immediately.
■■
The consignment must be checked for completeness based on the shipping
documents. The manufacturer must be notified in writing without delay about
any possible deviations.
3.4
Storage
Warning!
Risk of injury due to sliding or tilting of transport units. Sufficient
stability and evenness of the supporting area (floor) must be
ensured.
The transport packaging is not intended
for storage.
If earthing switches are not commissioned immediately after delivery, they
can be stored under the following conditions:
■■ Storage only admissible indoors
■■
16
Earthing switches must be sealed
with desiccant in aluminium foil and
be packed in a wooden crate (storage for max. two years after the
date of packaging).
+ 40 ºC
– 25 ºC
Fig. 16
Schematic diagram of storage conditions for earthing switch EI SC
AGS 531 986-01 | Edition 05/2011
EI SC
4
4.1
Assembly
Safety provisions and instructions for assembly
Danger!
Prior to performing work in the high-voltage area, de-energize the
system, verify it for zero voltage and earth the system according
to the applicable safety rules in acc. with EN 50110-1.
Danger!
Prior to performing work on the drive mechanism or on the earthing switch, switch off the supply voltage and prevent the system
from reclosing.
Warning!
Risk of injury from movable parts in mechanical drives:
- isolate the system from the supply voltage,
- Always switch ON the earthing switch and do not charge the
earthing switch drive mechanism during assembly.
Fitters
The earthing switch may only be assembled and connected by the manufacturer’s
staff or by persons with proven experience in conjunction with the EI SC series and
the applicable safety provisions.
Important:
■■ The tightening torques in Chapter 9.3 on page 29 must be used
for all screw connections which are not directly defined in the assembly description.
■■ Check technical data on the nameplate (see page 12).
4.2
State as delivered
The earthing switch EI SC is delivered in ON position (closing spring released) (Fig.
Fig. 17).
Fig. 17
State as delivered
AGS 531 986-01 | Edition 05/2011
17
EI SC
4
Assembly
4.3
Transport by means of a crane
Warning!
Risk of injury during crane transport.
The appropriate regulations for hoisting equipment must be complied with. Make sure the crane mounting harness is sufficiently
strong.
Never lift the switch by grasping it by the post insulators or conductor bars.
The earthing switch can be lifted by
grasping it on the frame or on the
operating shaft. To this effect, a crane
mounting harness with rope
Ø 12–15 mm (not a metallic steel rope)
or a strap is used.
Fig. 18
Crane transport
4.4
Changing the drive side (optional)
Prior to changing the drive side, a new return spring (Fig. 19, no. 3) must be ordered
from the manufacturer's:
Return spring, right-hand: AGSI09329-01
Return spring, left-hand: AGSI09347-01
Conversion from right-hand drive to left-hand drive:
1.
Remove collar (Fig. 19, no. 4) and drive lever (5) from the shaft (1). Release
clamping piece with free wheeling (2). Pull clamping piece and return spring (3)
from the shaft. Do not re-use return spring.
2.
Mount clamping piece, new return spring, drive lever and collar onto the other
end of the operating shaft analogously (Fig. 19).
1
3
2
5
Fig. 19
Removal on the right-hand side
1 Operating shaft
2 Clamping piece
3 Return spring AGSI09329-01
4 Collar
5 Drive lever
18
4
4
3
2
1
5
Fig. 20
Mounting on the right-hand side
1 Operating shaft
2 Clamping piece
3 Return spring AGSI09347-01
4 Collar
5 Drive lever
AGS 531 986-01 | Edition 05/2011
EI SC
4
Assembly
4.5
Installation positions
The installation position for the series EI SC earthing switch can be selected freely,
in acc. with Fig. 21. To this effect, the operating shaft must always be in horizontal
position.
Important:
For different installation positions, please enquire at the manufacturer's.
4
1
3
2
Fig. 21
Possible installation positions for earthing switch EI SC
1 Wall mounting
2 Floor installation
3 Wall mounting, upside down
4 Ceiling mounting
AGS 531 986-01 | Edition 05/2011
19
EI SC
4
Assembly
4.6
Fastening
Important:
The switch frame must not be distorted during assembly. In case of an
uneven mounting surface, place washers below the unit.
Fasteners are not included in the scope of supplies. The fastening material and the
support must be suitable to bear the weight of the earthing switch EI SC and for
operation thereof. Providing sufficient fastening is the responsibility of the operating
company.
The earthing switch EI SC is equipped with 4 oblong holes of 28 x 14 mm (Fig. 22)
for fastening.
Fasten the earthing switch to a metal frame or to a concrete wall by means of 4 bolts
M12.
Fig. 22
Securing boreholes of the earthing switch EI SC
4.7
Earth terminal
Earthing devices are not included in the scope of supplies.
Design and dimensioning of the earth terminal for the switch disconnector acc. to
■■ IEC 62271-100 and
■■
national design specification (Germany: DIN VDE 0101)
The mechanical fastening of the switch disconnector to a steel frame can be used
simultaneously for earthing the switch disconnector.
Additional earth terminal
Moreover, the frame cross beam features an earth terminal (bolt M12) which is
identified by an earthing symbol (Fig. 23). Its position depends on the variant of the
earthing switch: at the top or front.
Important:
Coat contact surfaces and comply with specified tightening torques
(see Chapter 9.3 as of page 29).
Fig. 23
Earth terminals (position - at the top or front - depending on the design)
20
AGS 531 986-01 | Edition 05/2011
EI SC
5
Drives for the EI SC series
Drives are not included in the scope of supplies and must be ordered separately.
Available drive variants
Mounting drives
The following drives can be used for actuation of the earthing switch EI SC:
■■ Manual linkage drive mechanism STA 2 (Fig. 24)
■■
Manual articulated drive mechanism STAD 2 (Fig. 25)
■■
Motor-operated drive mechanism GM 3-1 (Fig. 26)
■■
Lever QW6 with extensions QV1 (Fig. 27)
The actuation angle of the contact blades is approx. 90°.
Attachment of the drives is dependent on the installation position of the earthing
switch, on the operator side and the type of drive as such.
Assembly of the illustrated drives, as far as specified, is described in separate manuals.
Please refer to the separate manuals for the manual linkage drive mechanism STA 2
and for the motor-operated drive GM 3-1.
Warning!
Mortal danger due to high voltage!
When attaching the drives, make sure that parts of the drive linkage do not get too close to live parts.
In case of doubt, please contact the manufacturer.
Manual drive mechanism STA 2
For mechanical actuation of the earthing switch EI SC, the manual linkage drive
mechanism STA 2 (Fig. 24) is available. The design of the drive depends on the
installation position and on the operator side of the earthing switch.
ON
Fig. 24
Manual linkage drive mechanism STA 2
AGS 531 986-01 | Edition 05/2011
21
5
EI SC
Drives for the EI SC series
Manual articulated drive mechanism STAD 2
OFF
135-433
90º
90º
46,7
OFF
45,5
63
ON
ON
63
Ø 10
7
90º
1
9
1
2
7
8
Ø 55
4
6
Ø 30
5
135-433
3
10
10
11
12
L
Fig. 25
Manual articulated drive mechanism STAD 2
1 Cell frame
2 Drive lever for the earthing switch
3 Drive shaft of earthing switch
4 Coupling rod
5 Rear bearing
6 Stop
7 Steel shaft (optional plastic shaft)
22
8
9
10
11
12
Front bearing
Swivel lever
Steel ring with clampscrew for axial blocking of the shaft
Roll pin for taking the shaft along
ON/OFF indicator dial
AGS 531 986-01 | Edition 05/2011
EI SC
5
Drives for the EI SC series
Motor-operated drive mechanism
GM 3-1
For electrical actuation of the earthing switch EI SC, motor-operated drives of type
GM 3-1 are available (Fig. 26). They are mounted directly to the frame of the earthing switch so as to create a complete unit.
Optionally, the motor-operated drive can also be delivered separately as an accessory and be installed in a different place in the cell.
Important:
For attachment dimensions and dimensional diagrams for the motoroperated drive GM3-1, please contact the manufacturer.
Fig. 26
Motor-operated drive mechanism GM 3-1
Lever QW6 with extension QV1
Optionally, the earthing switch can be delivered with the actuating lever QW6 and
the extension QV1 (in red or metallic) (Fig. 27).
The earthing switch is actuated by means of a commercially available operating rod
(1), which is not included in the scope of supplies.
2
1
3
Fig. 27
Drive mechanism with lever QW6 (2), extension QV1 (3) and commercially
available operating rod (1)
AGS 531 986-01 | Edition 05/2011
23
EI SC
6
Safety provisions and
instructions for assembly
High-voltage terminal
Warning!
The earthing switch can be damaged by inadmissible mechanical
stress. Conductor bars must be fastened additionally to prevent
mechanical forces from being exercised on the earthing switch
after screw-fastening.
Important:
Note for connection of the coductor bars:
■■ Conductor bars must be dimensioned sufficiently according to the
specifications for rated and short-circuit current. National regulations must be observed.
■■ In case of short-circuit current, make sure that the earthing switch
is not exposed to higher electrodynamic forces. The connecting
bars must be provided with sufficient support in the vicinity of the
connecting points.
■■ The conductor bars must be positioned flat and so as to cover the
holes. When tightening the connection bolts, make sure the switch
connecting elements are not turned. Make sure to use a second
wrench to block the bolts.
Connecting conductor bars
1.
Pre-coat connecting surfaces (see page 28).
2.
Fasten busbars with the bolts M12 supplied with the unit as shown in Fig. 28
(tightening torque, see page 29).
1
2
Fig. 28
Conductor bar terminal
1 Conductor bars
2 M12 screw fastening
24
AGS 531 986-01 | Edition 05/2011
EI SC
7
Commissioning
Danger!
Mortal danger due to high voltage. The high-voltage supply must
not be connected. All active parts must be earthed.
7.1
Checking assembly
If damage has been detected, it must be repaired or the appropriate components
be replaced immediately. In case of ambiguities or irregularities, please contact the
manufacturer’s Service Center.
1.
Check securing bolts.
2.
Check the conductor bars’ screw connections using a torque wrench.
3.
Check wiring laid on the site.
4.
Check the earthing switch for damage which might be due to transport or assembly work.
5.
Compare the data on the nameplate (see Chapter 2.7, page 12) to the required
rating specifications.
6.
Check supply voltage of the control and operating devices.
7.
Check surfaces of insulating components for impurities. Clean if necessary (see
page 27).
7.2
Performing switching tests
Warning!
Risk of injury due to the
precharged drive mechanism and the quickly
rotating contact blades.
Perform switching tests
only via the attached
drive mechanisms and
keep a sufficient distance
from the earthing switch.
Do not reach into the area
of movement of the
contact blades.
Important:
In case of failure of the power supply, the blocking coils (optional) are
in "locked" position; thus, manual switching operations are blocked.
Action: switch power supply ON.
AGS 531 986-01 | Edition 05/2011
1.
Apply supply voltage.
2.
Switch the earthing switch ON and OFF manually several times. Check position
indicators of auxiliary switches.
3.
Check electrical functions of control and operating devices:
––
optional interlock with blocking coil
––
optional motor-operated drive GM 3-1 for earthing switch
25
EI SC
8
8.1
Maintenance
Servicing and maintenance instructions
Danger!
Prior to performing work in the high-voltage area, de-energize the
system, verify it for zero voltage and earth the system according
to the applicable safety rules in acc. with EN 50110-1.
Danger!
Prior to performing work on the drive mechanism or on the earthing switch, switch off the supply voltage and prevent reclosure.
Warning!
Risk of injury from movable parts in mechanical drives:
- isolate the system from the supply voltage,
- Always switch ON the earthing switch and do not charge the
drive of the earthing switch during assembly.
- Do not disassemble the earthing switch for maintenance work.
Maintenance work on the earthing switch may only be performed by the manufacturer’s staff or by persons with proven experience in conjunction with the EI SC series
and the applicable safety provisions.
Series EI SC earthing switches are indoor switching devices designed for normal
operating conditions acc. to IEC 62271-1.
Inspection
It is recommended to check the earthing switch visually on a regular basis and according to the applicable national regulations, depending on the strain to which it is
subjected. A visual inspection includes a complete check of the earthing switch for
contamination, condensation and damage, to be performed by certified staff.
Important:
In case of frequent condensation or air pollution (dust, smoke or corrosive gases), the maintenance intervals must be adapted to the actual
conditions.
Maintenance
If there are signs of impurities or condensation, the earthing switch must be cleaned
in an expert fashion (see Chapters 8.2 and 8.3, page 27) and subsequently checked
for proper functioning (see Chapter 7.2 on page 25).
Servicing
If damage has been detected, it must be repaired without delay or components be
replaced.
In case of ambiguities or irregularities, please contact the manufacturer’s Service
Center.
Servicing interval
Servicing work
Qualification /
Work performed
by
after 2 closing operations with rated
short-circuit making current
after exposure to major stress by rated
short-time current
Inspection of the
earthing switch
certified staff
after 1000 mechanical operations without electrical load
26
AGS 531 986-01 | Edition 05/2011
EI SC
8
Maintenance
8.2
Cleaning insulating components
To ensure the specified insulating level, the insulating components must be clean.
On principle, general cleanliness of the switch and of its external parts should be
ensured.
Slight contamination
Clean using a dry, lint-free cloth. Depending on the degree of soiling, replace cloth
as often as necessary.
Severe soiling
Use cleaning agent, 1 litre can (see Chapter 9.1, page 28).
The use of other cleaning agents is not admissible.
■■ Wear protective gloves
■■
Use cleaning agents according to manufacturer's instructions
■■
Soak the cloth thoroughly and wipe the insulating components. Keep duration
of exposure as short as possible.
■■
Expose the cleaned surface to the air for at least two hours.
When cleaning, make sure that the lubrication in the drive mechanisms is not removed. If the drive mechanisms are no longer sufficiently lubricated, new lubrication
must be applied.
8.3
Avoiding condensation
To ensure the specified insulating level, the device – especially its insulating components – must not be exposed to condensation.
Measures in case of
condensation
■■
If there are signs of condensation: clean the earthing switch (see Chapter 8.2).
■■
Check heating system or install a heating. It must provide a sufficient heating
performance to prevent condensation on the earthing switch.
■■
Condensation can also be prevented by ensuring suitable ventilation and heating of the station or by using de-humidification devices.
8.4
Corrosion protection
Earthing switches and drive mechanisms have a long-term protection against corrosion. Any scratches and other damage must be repaired immediately to avoid corrosion. Contact the manufacturer’s Service Center.
8.5
Lubrication instructions
For regreasing of bearings, latches and main circuit contacts, only the auxiliary
products listed in Chapter 9.1 may be used. Apply a very thin film of lubricant on live
parts.
Group of compoPoint of lubrication
nents
■■
Parts subject to
■■
mechanical stress
Contact areas
1
AGS 531 986-01 | Edition 05/2011
Lubricant
Application
Low-temperature
grease1
apply a uniform coat
Contact grease1
apply a
thin coat
Shaft bearing
Springs for instantaneous-switching
mechanism
■■
Contact rivet
■■
Suspension elements
■■
Contact tab
See Table "Auxiliary products" on page 28.
27
EI SC
9
Annex
9.1
Auxiliary products
The auxiliary products are available from the manufacturer. The use of other auxiliary products is not admissible.
Warning!
Risk of injury if these products are handled improperly.
Observe the safety data sheets of the manufacturers of the auxiliary products.
Designation
Ref. no.
Cleaning agent, 1-l can
S 008 152
Aseol Sylitea 3
Synthetic low-temperature grease with graphite
S 008 163
Berulub FK 60
Contact grease
AGSI89210-01
9.2
How to treat firmly screw-connected contact
surfaces
Important:
■■ Caution when handling bars insulated by heat-shrinkable sleeves.
The heat-shrinkable sleeve must not get into contact with contact
grease (swelling).
■■ Contact areas coated with contact grease should not be touched,
if possible.
1.
Contact surfaces must be subjected to preliminary treatment before screwfastening (see Table below)
2.
Immediately after pre-treatment, coat contact surfaces with contact grease so
that the space between the contact surfaces is filled once the screws have
been connected.
1
2
3
28
Material of contact surfaces
Pre-treatment
silver-plated
Clean1
Copper or copper alloy
Clean1, expose metallic surface2
Galvanized steel
Remove passivation, not, however, the
zinc layer3
by means of lint-free cloth; use cleaning agent in case of serious contamination
– by treating the entire surface with emery cloth or a rotating grinding tool (grain
size 100 or finer) or
– with a wire brush specifically marked for use exclusively for copper, aluminium, or steel
with brass or steel brush
AGS 531 986-01 | Edition 05/2011
EI SC
9
Annex
9.3
Specifications for screw connections
Important:
■■ The threads of screws and bolts must generally not be pre-treated.
■■ Max. tolerance for the effective tightening torques: ±15 %
■■
The nut must correspond in strength to the grade of the screw/bolt
used or be of better quality.
General screw connections
Grade or material
Screw/bolt
Thread Ø
Screw connections for
current transmission
AGS 531 986-01 | Edition 05/2011
Plastic
≥ 8.8 ≤ 10.9
Self-locking screw
≥ 8.8
Tightening torques [Nm]
M4
0,25
2,6
M5
0,5
5,0
7,0
M6
0,8
8,8
12,3
M8
1,8
21,0
30,0
M 10
3,5
42,0
59,0
M 12
6,0
70,0
97
Screws and bolts: Grade ≥ 8.8
Conductor material: copper
Thread Ø
Tightening
torques [Nm]
M6
6,5
M8
17
M 10
35
M 12
68
M 16
135
29
Notes:
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Only integral reproduction of this technical manual is permitted with the written permission from Schneider Electric. Electronic copies in e.g. PDF-format or scanned version
have the status “for information only” . The only valid version of this technical manual is always enclosed directly to the product in question by the factory.
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right to make changes regarding the standards, illustrations and technical
data described in this Technical Manual. For any requests, please contact
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AGS 531 986-01 | 05-2011