VD4 Vacuum Circuit-breaker with embedded poles 36…40.5

VD4 Vacuum Circuit-breaker with embedded poles 36…40.5
VD4 Vacuum Circuit-breaker
With Embeded Poles
36...40.5 kV, 1250...2500A, 25...31.5kA
Instruction Manual
Your safety first
always!
That's why our instruction manual begins with these recommendations:
Only install switchgear and/or switchboards in enclosed rooms suitable for
electrical equipment.
Ensure that installation, operation and maintenance are carried out by
specialist electricians only.
Comply in full with the legally recognized standards, the connection
conditions of the local electrical utility and the applicable safety at work
regulations.
Observe the relevant information in the instruction manual for all actions
involving switchgear and switchboards.
Danger!
Pay special attention to the hazard notes in the instruction manual marked with
this warning symbol.
Make sure that under operation condition of the switchgear or switchboard
the specified data are not exceeded.
Keep the instruction manual accessible to all persons concerned with
installation, operation and maintenance.
The user's personnel are to act responsibly in all matters affecting safety at
work and the correct handling of the switchgear.
WARNING
Always observe the instruction manual and follow the rules
of good engineering practice !
Hazardous voltage
can cause electrical shock and burns.
Disconnect power, then earth and short-circuit before proceeding
with any work on this equipment.
If you have any further questions on this instruction manual, the members of our
field organization will be pleased to provide the required information.
3
Contents
Page
Contents
Page
1
Summary
5
4
Despatch and storage
18
1.1
General
5
4.1
Condition on delivery
18
1.2
Standards and specifications
5
4.2
Packaging
18
1.2.1 Switchgear manufacture
5
4.3
Transport
18
1.2.2 Installation and operation
5
4.4
Delivery
19
1.3
Operating conditions
5
4.5
Intermediate storage
19
1.3.1 Normal operating conditions
5
5
Installation
19
1.3.2 Special operating conditions
5
6
Commissioning/Operation
20
2
Technical data
6
6.1
Note on safety at work
20
2.1
Technical data
6
6.2
Preparatory activities
20
Circuit-breakers for fixed installation
6.3
Operation of the circuit-breaker
20
and on withdrawable part
6.3.1 Charging the spring energy
2.2
Technical data
7
Releases and blocking magnet
2.3
storage mechanism
6.3.2 Closing and opening
20
6.3.3 Operating sequence
21
7
Maintenance
24
7.1
General
24
interrupter switching operations
7.2
Inspection and functional testing
24
in relation to breaking current
7.2.1 Switching devices in general
24
Technical data
7
Motor-operated mechanisms
2.4
20
Permissible number of vacuum
8
2.5
Dimensions
9
7.2.2 Stored-energy spring mechanism
24
3
Structure and function
13
7.2.3 Checking auxiliary switch settings
25
3.1
Structure of the breaker poles
13
3.2
Structure of the breaker operating
13
mechanism
3.2.1 Releases, blocking magnet
13
and auxiliary switches
on withdrawable part
7.2.4 Testing of interlock conditions
25
7.2.5 Breaker pole
25
7.3
26
Servicing
7.3.1 Switching devices in general
26
14
7.3.2 Stored-energy spring mechanism
26
3.3.1 Charging of the spring energy store
14
7.3.3 Breaker pole
26
3.3.2 Closing procedure
14
7.4
Repair
27
3.3.3 Opening procedure
14
8
Application of the
30
3.3.4 Autoreclosing sequence
14
3.3.5 Quenching principle of the
14
3.3
Function
X-ray regulations
vacuum interrupter
We reserve all rights to this publication. Misuse, particularly including
duplication and making available of this manual irdparties is prohibited.
The information supplied is without liability. Subject to alteration.
4
1
Summary
1.1
General
The vacuum circuit-breakers of type VD4 on withdrawable parts for 36 kV or 40.5 kV rated voltage
are intended for indoor installation in air-insulated
switchgear systems. Their switching capacity
is sufficient to handle any conditions arising
from switching of equipment and system
components under normal operating and fault
conditions, particularly short-circuits, within the
parameters of their technical data.
Vacuum circuit-breakers have particular adswitching frequency in the working current range
and/or where a certain number of short-circuit
breaking operations are expected. Type VD4
vacuum circuit-breakers are suitable for autoreclosing, and have exceptionally high operating
reliability and long life.
The vacuum circuit-breakers designed in column
form, are supplied as withdrawable modules. Their
basic structure is shown in figures 3/1,3/2,3/7 and
3/8.
1.2
- Health and Safety at Work Standard VBG 1
- Health and Safety at Work Standard VBG 4
●
Safety guidelines for auxiliary and operating
materials
●
Order related details provided by
ABB Xiamen Switchgear Co.,Ltd.
1.3
Operating conditions
1.3.1 Normal operating conditions
Design to GB/T 11022, "Common specification
for high-voltage switchgear and controlgear
standards", IEC publication 60694, VDE 0670
part 100, with the following limit values:
●
Ambient temperature:
- Maximum
+40˚C
- Highest mean value measured
in 24 hours
+35˚C
- Minimum (according to "minus
5 indoor class")
●
-15˚C
Humidity
- Highest mean value of relative humidity
Standards and specifications
measured over 24 hours
95%
- Highest mean value of vapour pressure
measured over 24 hours
2.2kPa
1.2.1 Switchgear manufacture
The switchgear complies with the following
specifications in accordance with GB, IEC and
the relevant DIN VDE publications respectively.
- Highest mean value of relative humidity
measured over 1 month
90%
- Highest mean value of vapour pressure
●
●
GB/T 11022, IEC 60694 and DIN VDE 0670
part 100, "Common specifications for highvoltage switchgear and controlgear standards".
GB 1984 and IEC 62271-100, "High-voltage
alternating-current circuit-breakers".
1.2.2 Installation and operation
The relevant specifications are to be taken into
account during installation and operation,
particularly:
●
IEC 61936, Electrical devices with rated
voltage above AC 1 kV
●
DIN VDE 0101, Power installations exceeding
AC 1 kV
●
DIN VDE 0105, operation of electrical
installations
●
DIN VDE 0141, earthing systems for special
power installations with rated voltages over
1 kV
●
Accident prevention regulations issued by the
appropriate professional bodies or comparable
organisations.
In Germany, these comprise the following
safety regulations:
measured over 1 month
●
1.8kPa
Maximum site altitude:
1000m above sea level
1.3.2 Special operating conditions
Special operating conditions are to be agreed
on by the manufacturer and user. The
manufacturer must be consulted in advance about
each special operating condition:
●
Site altitude over 1000 m:
- Allow for the reduction in the dielectric
strength of the air.
●
Increased ambient temperature:
- Current carrying capacity is reduced.
- Provide additional ventilation for heat
dissipation.
●
Climate:
- Avoid the risk of corrosion or other damage
in areas:
○with high humidity and/or
○with major rapid temperature fluctuations.
- Implement preventive measures (e.g.
electric heaters) to preclude condensation
phenomena.
5
2
Technical data
2.1
Technical data
circuit-breakers for fixed installation and on withdrawable part
Rated voltage
kV
Rated frequency
Hz
Rated lightning impulse withstand voltage
kV
Rated power frequency withstand voltage(1min) kV
Rate of rise of transient recovery voltage
kV/µs
Peak of transient recovery voltage
kV
Rated operating sequence
Rated operating sequence with autoreclosing
Breakertype
Rated
short-circuit
breaking
current,
symm.1)
Rated
short-circuit
breaking
current,
asymmetr.1)
Rated
short-circuit
mreaking
current,
(peak.)1)
Rated
short-circuit
duration
Pole
Centres
Fixed Withdrawable
Weight
A
kA
kA
kA
s
mm
approx. kg
3612-25 36
3616-25 36
3620-25 36
1250
1600
2000
25
27.3
63
4
360 280
320 290
320 290
355 340
3625-25 36
2500
3612-31 36
3616-31 36
1250
1600
3620-31 36
3625-31 36
2000
2500
4012-25
4016-25
4020-25
4025-25
40.5
40.5
40.5
40.5
1250
1600
2000
2500
25
27.3
63
4
360 280
290
290
340
340
4012-31 40.5
4016-31 40.5
4020-31 40.5
1250
1600
2000
31.5
34.3
80
4
360 280
290 290
290 290
340 340
4025-31 40.5
2500
VD4...
Rated
voltage
kV
Rated
current
36
40.5
50/60
50/60
170
185
70
95
0.57
0.69
62
70
O-3min-CO-3min-CO
O-0.3s-CO-3min-CO
355 340
31.5
34.3
80
4
360 280
2)
6
320 290
320 290
355 340
355 340
Guideline values for function times at the rated supply voltage:
Closing time
approx. 55~67 ms
approx. 33~45 ms
Opening time
≤
Arcing time (at 50 Hz)
15 ms
Total break time
60 ms
≤
Minimum command time on closing
20 ms (120 ms 2) )
Minimum command time on opening
20 ms (80 ms 2) )
1)
Fixed Withdrawable
When the operating voltage is lower than the rated voltage, the same values apply as for rated voltage.
Higher values on request.
If the activating relay contact cannot itself interrupt the release coil current
290
290
340
340
340 340
2.2
Technical data
Releases and blocking magnet
Power consumption1)
AC
DC
VA
W
Equipment
Shunt release OFF
Shunt release ON
Blocking magnet
Undervoltage release
undelayed
delayed
Indirect overcurrent release
with intermediate current transformer
two-phase
three-phase
1)
2)
3)
4)
2.3
Y23) , Y9 3)
Y2 4) , Y9 4)
Y3 3)
4)
Y3
Y13) 4)
Y4
250
310
250
310
10
250
310
250
310
10
11
10
10
-
Y7
3.5 2) /15
2.0 2) /15
-
Approximate values
With short-circuited intermediate current transformer
Auxiliary voltages AC: 110 and 220 V, DC: 24, 48, 60, 110 and 220 V.
Auxiliary voltage AC: 240 V, DC: 125 and 240 V.
Technical data
Motor-operated mechanisms
1)
2)
Auxiliary
voltage
Power
consumption 1)
Charging time
(maximum)2)
V
VA/W
s
AC
110
220
240
150
150
170
15
15
15
DC
24
30
48
60
110
125
220
240
130
130
130
130
140
160
140
150
15
15
15
15
15
15
15
15
Approximate values
At the rated auxiliary voltage
7
2.4
Permissible number of vacuum interrupter switching operations in relation to breaking current
See figure 2/1.
10
5
10
8
6
6
Rated
current
4
3
3
10
8
4
6
6
4
4
3
3
2
2
10 3
8
10 3
8
6
6
4
4
3
3
2
10
8
1250 A
1600 A
2000 A
2500 A
2
Number of operations n
Number of operations n
4
Rated
current
4
1250 A
1600 A
2000 A
2500 A
2
10
8
5
8
2
6
4
3
2
10
8
2
10
8
2
6
4
3
2
10
8
6
5
6
5
0.05
0.1
0.2
0.3 0.4 0.6 0.8 1
2
3
4
6
8 10
Breaking current I a (kA)
a) Circuit-breaker type VD4, 36 kV and 40.5 kV
Rated short-circuit breaking current 25 kA
20
30 40 60
0.05
0.1
0.2
0.3 0.4 0.6 0.8 1
3
4
6
8 10
Breaking current I a (kA)
b) Circuit-breaker type VD4, 36 kV and 40.5 kV
Rated short-circuit breaking current 31.5 kA
Figure 2/1: Permissible number of vacuum interrupter operating
cycles n as a function of the breaking current I a
8
2
20
30 40 60
2.5
Dimensions
See figure 2/2,2/3.
892
390
295
840
260
50.2
a
280
40
80
4
281
20
900
25
1294
1575
b
328
280
K
516
485
510
8
18
104
TK
36
111
TP
61 124
100
188
708
760
905
TP
85
120
35
10
194
204
14
252
430
35
60
400
445
520
535
945
85
695
TK = Transport bracket 147
TP = Transport profile 148
K = Entrance for control cables
50.2 = Front partition plate
a
b
1250/1600A
O 74
O 35
2000/2500A
O 113
O 79
Rated current
Note:
Transport bracket TK (147) and transport profile TP (148) only fitted for handling.
Remove and store prior to commissioning.
390
Fig. 2/2 Dimension of withdrable VD4 40.5kV
260
DETAIL A
M
12
40
40
360
328
360
A
900
45
158
185
6
35
4- 11
5
310
381
516
18
8
36
4
0
104
39
14
36
20
2
8
1294
1575
62
40
124
61 139.5
868
920
1065
1105
Fig. 2/3 Dimension of fixed VD4 40.5kV
535
685
435
445
555
60
75
9
Charging motor
Standard
arrangement
Type 22
1) Only when Y1 is not fitted
2) External operation
Special arrangement for -S5
Type 19
Type 20
Type 21
Type 23
Type 24
– S1 Auxiliary switch on operating mechanism
– Y1 Blocking magnet
– V3 Series rectifier for –Y3 and –K0
– S2 Auxiliary switch on blocking magnet
– Y2 Shunt release OFF
– V4 Series rectifier for –Y4
– S3 Auxiliary switch on the breaker shaft
– Y3 Shunt release ON
– V7 Series rectifier for –Y7
– S4 Auxiliary switch on the breaker shaft
– Y4 Undervoltage release
– V9 Series rectifier for –Y9
– S5 Auxiliary switch on the breaker shaft
– Y7 Indirect overcurrent release
– M0 Charging motor for stored-energy spring
– S7 Auxiliary switch for fault annunciation
– Y9 Second shunt release OFF
– K0 Anti-pumping relay
– V1 Series rectifier for –Y1
– R0 Series resistor
(fleeting contact, time ≥ 30 ms)
– V2 Series rectifier for –Y2
Fig. 2/4 Circuit diagram for motor-charged operation mechanism
Note:
1) For DC 24V, 30V, 48V, 60V, 110V, 125V, 220V, 240V; AC 110V, 220V,
240V
2) Spring in the diagram is discharged. Standard configurations and
options available for VD4 are contained in the diagram. Also see
relative catalogues and order forms for all possible configuration.
3) Releases and blocking magnets are fundamentally wired with rectifiers
(e.g. magnet holder 45 with integrated rectifiers V1, V2, V3 and V9).
Rectifiers function as free-wheeling diodes with DC supply.
10
Tag. Available auxiliary circuit components
1) Motor charged, fixed version: Y2, Y3, K0, S1, S3, S4
2) Motor charged, withdrwable version: Y1, Y2, Y3, K0,
S1, S2, S3, S4, S8, S9
Any requirement exceed mentioned above, should be
declared in the contract.
Fig. 2/5 Circuit diagram for withdrawable VD4
11
Undervoltage release
Indirect overcurrent release
2nd Shunt release OFF
Auxiliary switch on mechanism
Y4
Y7
Fleeting contact ≥ 30 ms for c.b.
tripped indication
Antipumping relay
Series rectifier
Charging motor
S7
K0
V0-V9
M0
S2
Auxiliary switch on block magnet -Y1
S3,S4,S5 Auxiliary switch on switch shaft
Y9
S1
Socket with 58 pins
Closing block magnet
1st Shunt release OFF
Closing release
X0
Y1
Y2
Y3
Auxiliary circuit component in circuit breaker
Limit switch test position
Limit switch service position
Block magnet on truck
With S5, connect as dashed ①showed.
Without S5, connect as dashed ② showed.
S8
S9
Y0
Auxiliary circuit component in truck
Test position
Service position
S1 shows the circuit breaker units in the switch position OFF and with the stored-energy spring mechanisms discharged.
Circuit diagram for withdrawable VD4
Fig. 2/6 Circuit diagram for fixed VD4
12
Closing release
Undervoltage release
Indirect overcurrent release
2nd Shunt release OFF
Y3
Y4
Y7
Antipumping relay
Series rectifier
Charging motor
K0
V0-V9
M0
S3,S4,S5 Auxiliary switch on switch shaft
S7
Fleeting contact ≥30 ms for c.b. tripped indication
Auxiliary switch on mechanism
Auxiliary switch on block magnet -Y1
1st Shunt release OFF
Y2
Y9
S1
S2
Socket with 58 pins
Closing block magnet
X0
Y1
Auxiliary circuit component in circuit breaker
●
●
be declared in the
contract.
Any requirement exceed
mentioned above, should
mechanisms discharged.
Available auxiliary circuit
components:
Y2, Y3, K0, S1, S3, S4
S1 shows the storedenergy spring
Note:
Circuit breaker units in the switch position OFF and the stored-energy spring mechanisms is discharged.
Circuit diagram for fixed VD4
3
Structure and function
●
Five-pole auxiliary switches S3 and S4
3.1
Structure of the breaker poles
●
ON-OFF operating shaft 54
(Figures 3/1, 3/2 , 3/6, 3/7 and 3/8)
●
Mechanical switch position indicator 55.4
●
Charging condition indicator 55.8 for the stored
energy spring
●
Mechanical operating cycle counter 55.5.
●
Motor charging mechanism
●
Five-pole auxiliary switch S1 to switch the
charging motor
●
Anti-pumping relay K0.
The 36 kV and 40.5 kV circuit-breakers of type
VD4 are designed as withdrawable units. The
poles, which are constructed in column form, are
mounted on a torsionally rigid enclosure substructure with rollers. The live parts of the breaker
poles are located in the insulating material
pole tubes and protected from impacts and other
external influences.
With the breaker closed, the current path leads
from the upper contact arm 57.1 and a chamber
holder fixed in the pole tube to the fixed contact
58.2 in the vacuum interrupter 58, then via
the moving contact 58.3 and roller contact to
the lower contact arm 57.2. The switching motion
is effected by means of the insulated coupling
rod with internal contact force springs.
3.2
Structure of the breaker operating mechanism
(Figures 3/3, 3/4, 3/7, 6/1 to 6/5, 7/5 to 7/8)
The operating mechanism located in the housing
substructure is of the stored-energy spring type
and acts on the three breaker poles. The necessary
operating energy is stored ready for activation
by charging the spring energy storage mechanism.
The stored-energy spring mechanism essentially
consists of drum 55.33 containing the spiral spring,
the charging system, the latching and operating
mechanism and the linkages which transmit
the force to the breaker poles. In addition, there
are supplementary components such as the
charging motor, releases, auxiliary switches and
the controls and instruments.
The operating mechanism is fundamentally suitable
for autoreclosing and, due to the short charging
times, also for multi-shot autoreclosing.
The operating mechanism is normally fitted with
a charging motor. There is also a facility for
charging the stored energy spring manually.
There is one rating plate 55.7 with the main data
of the switch equipment on front cover plate left
hand side 50.7, and another on breaker
mechanism housing.
The basic version of the stored-energy spring
mechnism is fitted with the following auxiliary
equipment:
●
Shunt release OFF Y2
●
Shunt release ON Y3
●
Blocking magnet Y1 with auxiliary switch S2
The following additional equipment can
be installed:
●
Blocking magnet Y0 on the withdrawable part
●
Second shunt release OFF Y9
●
Indirect overcurrent release Y7
●
Auxiliary switch S7 for electrical opening
signalling
●
Undervoltage release Y4
●
Five-pole auxiliary switch S5
3.2.1 Releases, blocking magnet and auxiliary switches
(Figures 2/4 to 2/6, 3/3, 6/2, 7/7 and 7/8)
The releases and the blocking magnet
are mounted at the bottom of the stored-energy
spring mechanism.
The allocation of the auxiliary switches can be
seen in the wiring diagram of figure 2/4.
The five-pole auxiliary switch S1 is operated by
the charging condition indicator 55.8. It controls
the charging motor M1, serves as an electrical
interlock for shunt release ON Y3 when the
spring energy storage mechanism is not sufficiently
charged, and also provides an electrical
switching readiness signal.
Operation of the five-pole auxiliary switches S3,
S4 and S5 is dependent on the switching position
of the circuit-breaker.
Auxiliary switch S3 interrupts the circuit of the
optional additional shunt release OFF Y9 with
the circuit-breaker in the open position, and the
circuits of shunt release ON Y3 and the optional
blocking magnet Y1 with the circuit-breaker in
the closed position. There is one further NOC
for other purposes.
Auxiliary switch S4 interrupts the circuit of shunt
release OFF Y2 with the circuit-breaker in the
open position. One further NOC and three
NCCs are available for annunciation, control
and interlock purposes.
13
Auxiliary switch S5 can be optionally designed
with any possible combination of contacts from
five NOCs to five NCCs. Its contacts are available
for any required control, annunciation or
interlock functions. The auxiliary switch is
normally configured as shown in figure 7/3.
The single pole auxiliary switch S7 (fleeting contact
time 30 ms) serves to provide a fault signal
("breaker released"). With remote control,
the auxiliary switch is necessarily operated via:
●
Shunt release OFF Y2 or
●
Shunt release OFF Y9 or
●
Undervoltage release Y4 or
●
Indirect overcurrent release Y7.
Note:
1. Shunt releases OFF (Y2) and ON (Y3)
are exclusively provided for opening and
closing in normal operation. For safety
breaking operations, the second shunt release
OFF (Y9) must be used, in most cases with
a separate control voltage supply.
These three releases are of the solenoid
type and suitable for a large number of
operating cycles.
2. The under voltage release (Y4) and/or
indirect over current release (Y7) are pure
safety and protection releases and must not
be used for switching in normal operation.
3.3
Function
3.3.1 Charging of the spring energy store
(Figures 3/3, 3/10, 6/2, 6/6, 7/7 and 7/8)
To provide the necessary motive energy, the spring
energy storage mechanism is charged via chain
55.34 fitted with ratchet wheel 55.35, either
automatically by a charging motor or by hand in
a vertical pumping action with charging lever
128. The current charging condition is
shown at charging condition indicator 55.8
As a precondition for an autoreclosing sequence,
the operating mechanism is either (re-)charged
after a closing operation automatically by
the charging motor, or it requires (re-)charging by
hand if the operating mechanism is of the manual
type.
3.3.2 Closing procedure
(Figures 3/4, 3/6, 6/1, 6/3 and 7/7)
The closing process is initiated manually by
the double bit key 145 and the ON-OFF operating
shaft 54, or electrically by activation of shunt
release Y3. The release mechanism then permits
14
drive shaft 55.30 to be rotated by the (previously)
charged spiral spring. The moving contact 58.3
in vacuum interrupter 58 is moved until the contacts
touch by cam disk and further kinematic links. In
the further sequence of motion, spring
arrangement is tensioned and the appropriate
amount of contact force thus applied. The
available overtravel is higher than the maximum
value of contact erosion during lifetime of the
interrupter. During the closing process, opening
springs are simultaneously tensioned.
3.3.3 Opening procedure
(Figures 3/3, 3/6, 6/3 and 7/7)
The opening procedure is initiated manually by
the double bit key 145 and the ON-OFF operating
shaft 54, or electrically by activation of one
of the releases Y2, Y4, Y7 or Y9. Release
mechanism then permits drive shaft 55.30 to
be turned further by the spring energy
storage mechanism, which is still sufficiently
charged. The opening spring, which is thus
released, moves the contact 58.3 into the open
position at a defined speed.
3.3.4 Autoreclosing sequence
An OFF-ON or OFF-ON-OFF autoreclosing
sequence is activated and checked by the
protection system. It is necessary for the spiral
spring in the operating mechanism to be in
the (re-)charged condition, with the circuitbreaker in the closed position. The (re-)charging
process is carried out automatically after closing
of the breaker on breakers with motor
charging mechanisms, but must be carried out
manually on breakers without charging motors
(or when the charging motor has broken down).
Opening of the breaker is also possible during
the (re-)charging process, but sub-sequent closing
of the breaker is however blocked until the
charging process has been completed.
3.3.5 Quenching principle of the vacuum interrupter
Due to the extremely low static interrupter chamber
pressure of 10-2 to 10-6 pa, only a relatively small
contact gap is required to achieve a high dielectric
strength. The arc is extinguished on one of the
first natural current zeros.
Due to the small contact gap and the high
conductivity of the metal vapour plasma, the arc
drop voltage, and additionally, due to the short
arcing time, the associated arc energy, are
extremely low, which has advantageous effects
on the life of the contacts and thus on that
of the vacuum interrupters.
50.2
57.1
57.8
57.2
50.1
50.8
Figure 3/1: Withdrawable part with circuit-breaker, type VD4,
operator's side
Figure 3/2: Withdrawable part with circuit-breaker, type VD4,
pole side
50.1
50.2
50.8
57.1
57.2
57.8
Earthing contact
Front partition plate
Wheel
Upper contact arm
Lower contact arm
Insulating material pole tube
54
54.1
55.8
55.6
55.5
55.4
55.7
Figure 3/3: Withdrawable part with circuit-breaker, type VD4,
controls for the circuit-breaker
54
54.1
55.4
55.5
55.6
55.7
55.8
ON-OFF operating shaft
Link rod
Switch position indicator
Operating cycle counter
Socket for charging lever
Rating plate
Charging condition indicator
15
51.2
51
51.1
50.1
147
50.4
50
50.3
50.4
50.3
148
Figure 3/4: Withdrawable part with circuit-breaker, type VD4,
left and operator's side view
50
50.3
50.4
51
51.1
51.2
147
148
Frame of the withdrawable part
Actuating pin
Guide cam
Interlock yoke
Catch pin
Sliding handle
Transport bracket
Transport profile
58.1
58.2
58.3
58.4
58.5
58.7
58.6
Figure 3/6: Partial section of a vacuum interrupter.
58.1
58.2
58.3
58.4
58.5
58.6
58.7
16
Insulator
Fixed contact
Moving contact
Metal bellows
Screen
Guide cylinder
Lid
Figure 3/5: Withdrawable part with circuit-breaker, type VD4,
(pole side, below)
50.1
50.3
50.4
Earthing contact
Actuating pin
Guide cam
Figure 3/7: Vacuum circuit-breaker, type VD4, for fixed installation,
operating side.
Figure 3/8: Vacuum circuit-breaker, type VD4, for fixed
installation, terminal side.
50.8 Rollers
57.1 Upper breaker terminal
57.2 Lower breaker terminal
57.8 Embedded pole
Figure 3/10: Indicators and controls on a circuit-breaker
for fixed installation.
50.7 Front plate
54.2 Mechanical ON pushbutton
54.3 Mechanical OFF pushbutton
55.4 Mechanical switch position indicator
55.5 Mechanical operating cycle counter
55.6 Socket (for charging lever)
55.7 Rating plate
Figure 3/9: Vacuum circuit-breaker, type VD4, for fixed installation,
55.8 Charging condition indicator
version with partition, terminal side.
17
4
Dispatch and storage
Notes:
4.1
Condition on delivery
●
Avoid impact during handling.
●
Do not subject to other damaging mechanical
stresses.
●
Lifting gear must not be attached to the breaker
poles or parts of the operating mechanism.
●
When moving the withdrawable part only use
the sliding handles 51.2 (e.g. for racking
in/out the circuit-breaker unit into/out of the
switchgear panel or for the transport of
the unit in the switchgear room). Do not
bring any force on the front partition plate 50.2
of the withdrawable part.
●
Only handle the modules by crane with boltedon transport brackets 147, suitable lifting
ropesand crane harness.
●
Ensure that the circuit-breaker unit on
the withdrawable part, with its relative high
situated centre of gravity, cannot tip over when
moving it by crane or fork-lift truck, or when
handling it outside the switchgear room.
●
4.2
The factory-assembled circuit-breakers on
withdrawable parts are checked at the
works for completeness of the equipment
installed and simultaneously subjected to a
routine test in accordance with GB/T 11022
GB 1984, IEC 60694,DIN VDE 0607 IEC
publication 62271-100, thus verifying their
correct structure and function.
Packaging
The circuit-breakers on withdrawable parts
are mounted individually on wooden pallets and
sealed in film and/or packed in cardboard for
delivery.
Packaging for overseas shipment:
●
4.3
Drying agent bags inserted in the filmsealed packaging.
Transport
Loading of the package units must only be carried
out with a
●
●
●
crane,
fork-lift truck and/or
trolley jack.
CrB
Figure 4/1: VD4 breaker on withdrawable part
Only handle by crane when the lifting lugs are fitted.
147 and crane harness are fitted.Always bear in
Always bear in mind that the high situated centre
mind that the high situated centre of gravity may
of gravity may induce the breaker to tip over!
induce the breaker to tip over!
50.2 Front partition plate (Do not stress this plate)
18
Figure 4/2: VD4 breaker for fixed installation
Only handle by crane when the transport bracket
147
Transport bracket (TK)
148
Transport profile (TP)
CrB
Crossbar
4.4
Delivery
5
The duties of the consignee on receipt of
the switching devices at site include the following:
●
Checking the delivery for completeness
and freedom from damage (e.g. moisture
and itsadverse effects).
●
Any short quantities, defects or damage
intransit:
- Must be precisely documented on
the consignment note.
- The shipper/carrier is to be notified
immediately in accordance with the
liability provisions.
Installation
(Figures 3/4, 4/1 and 4/2)
Perfect operation of the circuit-breaker depends
on careful and professional handling of
the withdrawable part.
●
Allocate each unit to the appropriate switchgear
panel in accordance with the switchgear plan
and the rated electrical data.
●
Remove the transport profile 148 and transport
brackets 147.
●
Insert the withdrawable part in the switchgear
panel checking for unimpeded motion and
function sequences, including the closing
of primary contacts when the service position
is reached.
●
Remove any dirt.
Note:
Always take photographs to document any major
damage.
4.5
Intermediate storage
Intermediate storage of the circuit-breaker unit
in the switch position OFF and the storedenergy spring mechanisms discharged (Indicator
DISCHARGED:
).
Conditions for optimum intermediate storage:
1. Devices with basic packaging or unpacked:
●
A dry and well ventilated storeroom
with climate in accordance with GB/T 11022,
IEC 60694, DIN VDE 0670.
●
Room temperature which does not fall below
-15˚C.
●
Do not remove or damage the packaging.
●
Unpackaged devices:
When the switchgears are operated in areas
with high humidity and/or major rapid
temperature fluctuations, there is a risk of dew
deposits which must remain an exception in
normal operating conditions Provisions should
be taken according to section 1.3.2 (special
operating conditions).
- Are to be loosely covered with
protective sheeting.
- Sufficient air circulation must be
maintained.
●
Check regularly for any condensation.
2. Devices with seaworthy or similar packaging
with internal protective sheeting:
●
Store the transport units:
-
protected from the weather,
-
dry,
-
safe from damage.
●
Check the packaging for damage.
●
Check the drying agent
-
on arrival of the consignment,
-
subsequently at appropriate intervals.
19
6
Commissioning/Operation
●
Insert charging lever 128 into the socket 55.6
and pump up and down for approx. 25 strokes
until the charged condition is displayed.
●
When the charged condition is reached,
the charging mechanism automatically
disengages, and further strokes of the charging
lever have no effect.
(Figures: 3/2, 3/3, 3/10, 6/1 to 6/7)
6.1
Note on safety at work
●
●
6.2
The switchgear may only be operated
by specially trained personnel who are familiar
with the characteristics of the particular device.
Operating circuit breaker in normal condition
in accordance with relevant regulations in GB/T
11022, IEC 60694,is a pre-condition of faultfree operation.
Preparatory activities
(Prior to application of primary voltage)
●
●
●
Check the charging motor on circuit-breakers
with motor-operated mechanisms by applying
auxiliary voltage.
●
●
6.3
Remove any contamination (particularly on
the insulating materials) which has occurred
during transit, storage or installation.
Check the primary connections and the earthing
contact 50.1.
●
Key to the charging condition indications:
Discharged
Charged
As a precondition for an autoreclosing sequence,
the operating mechanism is either (re-)charged
after a closing operation automatically by
the charging motor, or it requires (re-)charging by
hand if the operating mechanism is of the manual
type.
6.3.2 Closing and opening
On breakers with manual charging mechanisms,
charge the stored energy spring by hand (see
Section 6.3.1).
●
Operate the local or remote electrical control
unit.
●
Observe switch position indicator 55.4.
Perform a trial opening or closing operation
of the circuit-breaker using the double bit key
145 at the ON-OFF operating shaft 54 (taking
into account any required auxiliary voltage
and any relevant interlocks). Observe switch
position indicator 55.4 and charging condition
indicator 55.8.
The mechanical control system facilitates manual
operation of the circuit-breaker in the switchgear
cubicle even with the door closed:
The further procedure results from the
interaction of the truck with the switchgear
cubicle.
See the Operation Manual for the switchgearts.
Ensure that the Instruction Manual is available
to the operators at all times.
Operation of the circuit-breaker
(Figures 6/1 to 6/3 and 6/6, 6/7)
6.3.1 Charging the spring energy storage mechanism
Circuit-breakers with charging motors:
●
Charging takes place automatically.
●
If the charging motor breaks down, the charging
process can be carried out or completed
manually.
Circuit-breakers with manual charging
mechanisms:
20
Charging of the spring energy storage mechanism
by hand should only take place when the truck is
in the test/disconnected or removed position.
Check the circuit-breaker for damage and
restore to the proper conditions where
necessary.
●
●
Note:
●
Fit double bit key 145 on ON-OFF operating
shaft 54.
●
Turn the double bit key approx. 15 clockwiese
until the stop is reached to close the circuitbreaker, or anti-clockwise to open it.
The operating cycle counter 55.5 is automatically
incremented by one complete figure with each
switching cycle. On completion of a switching
operation the switch position indicator 55.4 in
the window of front cover plate 50.7. shows
the appropriate position of the circuit-breaker.
The anti-pumping relay K0 (wiring diagram
in firgure 2/3) prevents repeated ON-OFF
switching operations if, for example, the breaker
is tripped by a protection relay in response to a
primary side fault while a permanent electrical
closing command is simultaneously applied.
The circuit-breaker can then only be closed after
the closing command has been interrupted.
6.3.3 Operating sequence
Circuit-breaker with motorized charging of the stored-energy spring mechanism
Operating sequence
Result of operation
Breaker Position Charging Condition
Possible subsequent
switching operation
Switch on charging motor
O
Automatic charging
O
On-Off
and
I
Off
automatically (re-)charge
I
Open breaker
O
On-Off
and
I
Off
automatically (re-)charge
I
Autoreclosing
sequence
Off
O
(Activation via
protection system
On
I
Close breaker...
Close breaker...
Off
-
Off-On-Off or autoreclosing sequence
Off-On-Off or autoreclosing sequence
(automatic charging
starts)
O
Automatic charging completed
O
On-Off
Close breaker...
and
I
Off
automatically (re-)charge
I
Off-On-Off or autoreclosing sequence
21
51.1
51.2 51
52
54.1
55.8
55.6
128
50 50.4
50.7 55.7 55.4 55.5 50.6
Figure 6/1: Withdrawable part with circuit-breaker, type VD4,
control area
50
50.4
50.6
50.7
51
51.1
51.2
52
54.1
55.4
55.5
Frame of the withdrawable part
Guide cam
Cover plate, right hand side
Cover plate, left hand side
Interlock yoke
Catch pin, (spring loaded)
Sliding handle
Spindle
Link rod
Switch position indicator
Operating cycle counter
55.7
Rating plate
54
55.6
55.8
128
ON-OFF operating shaft
Triple bit key (ON-OFF operation)
146 52.1 52
Figure 6/4: Fitting the hand crank (against spring-loaded
intermediate plate) to move the withdrawable part inside
the panel clockwise towards the service position, and
anti-clockwise from the service position towards the test/
disconnected position
52
52.1
146
22
Socket for charging lever
Charging condition indicator
Charging lever
145
Figure 6/3: Manual operation of the circuit-breaker, by turning the
double bit key approx. 15 clockwise (ON), or approx. 15
anti-clockwise (OFF)
54
145
Figure 6/2: Changing the store-energy spring mechanism manually
by moving the inserted charging lever up and down
Spindle
Square spigot
Hand crank
51
51.2
51.4
51.1
128
Figure 6/5: Interlock yoke with sliding handles which will be moved
inwards to release the withdrawable part for withdrawing
from the panel.
51
51.1
51.2
51.4
Interlock yoke
Catch pin, spring loaded
Sliding handle
Blocking shaft (interlocking circuit-breaker and
withdrawable part)
145
146
Figure 6/6: Operating accessories
128
145
146
Charging lever
Triple bit key (ON-OFF operation)
Hand crank (for moving of the truck)
54.2
54.3
55.8
55.6
128
Figure 6/7: Vacuum circuit-breaker, type VD4, for fixed installation.
Manual charging of the stored-energy spring.
54.2 Mechanical ON push-button
54.3 Mechanical OFF push-button
55.6 Socket
55.8 Charging condition indicator
128 Charging lever
23
7
especially with front cover plates 50.6 and 50.7
removed.
Maintenance
Maintenance serves to ensure trouble-free
operation and achive the longest possible working
life of the switchgear. It comprises the following
closely related activities:
The spiral spring in the spring energy strage
mechanism, for instance, retains a basic tension
which is independent of the charging and
discharging processes during switching, so as
to ensure correct function. This spring energy can
be inadvertently released if work is performed
incorrectly on the spring mechanism!
Inspection: Determination of the actual condition
Servicing: Measures to maintain the specified
condition
Repair:
7.1
Measures to restore the specified
condition.
General
(Figure 7/1)
Vacuum circuit-breakers are characterized by their
simple and robust construction. They have a long
life expectancy. Their operating mechanisms have
a low maintenance requirement, and the
interrupters are maintenance-free during their
working life. There is no adverse effect on
the vacuum, even from frequent switching of
operating and short-circuit currents.
The servicing intervals and scope are determined
by environmental influences, the switching
sequences and number of short-circuit breaking
operations.
With carefully performed inspections and
servicing work, and under normal operating
conditions, the circuit-breakers, depending on
the type, have a service life of up to 30,000
operating cycles and more.
Note:
The following must be observed for all maintenance
work:
●
The relevant specifications in section 1.2.2
●
Notes on safety at work in section 6.1
●
Standards and specifications in the country
of installation.
Maintenance work may only be performed by
fully trained personnel, observing all the relevant
safety regulations. It is recommended that ABB
Xiamen Switchgear Limited Co. after-sales
service personnel should be called in, at
least during the performance of servicing and
repair work.
While the work is in progress, all auxiliary voltage
sources must also be disconnected and secured
to prevent reconnection.
7.2
Inspection and functional testing
7.2.1 Switching devices in general
The proper condition of the switching device is
to be verified by regular inspection.
Under normal operating conditions, testing by
a qualified personnel is to be performed at least
every 4 years.
In unusual operating conditions (including adverse
climatic conditions) and/or special environmental
pollutions (e.g. heavy contamination and
aggressive atmosphere), inspection may also be
necessary at shorter intervals.
Inspection at fixed intervals may be waived if
the switchgear is permanently monitored by a
qualified personnel.
The checks first and foremost comprise visual
examination for contamination, corrosion, moisture
and discharge phenomena.
If an incorrect condition is found, appropriate
servicing measures are to initiated.
7.2.2 Stored-energy spring mechanism
(Figures 7/2 to 7/5)
Functional testing of the operating mechanism is
to be performed:
●
after 5000 operating cycles or during servicing
work as set out in 7.2.1.
●
Prior to functional testing, switch the breaker
off and isolate the outgoing feeder.
Scope of functional testing:
●
Perform several switching operations under
no load, above all with circuit-breakers
seldom operated in normal service.
●
Switch off the charging motor (if fitted) and
discharge the spring mechanism by ON/OFF
switching operations.
●
Examine visual the condition of the lubrication
on rotary bearings, sliding surfaces, etc.
●
Check the proper mechanical/electrical
sequence of the individual functions.
●
Check circuit breaker's appearance.
Note:
In order to prevent accidents (particularly injury
to hands!) extreme care should be taken during
all repair work on the operating mechanism,
24
7.2.3 Checking auxiliary switch settings on withdrawable
part
(Figures 6/4, 6/6, 2/5 and 7/2)
Compliance with the interlock conditions in
the areas of the test/disconnected position and
the service position is ensured by auxiliary
switches S8 and S9, located in the breaker
housing.
service position when the circuit-breaker is open.
Check the following conditions individually:
●
With the circuit-breaker closed, insertion
of the withdrawable part towards the
service position must be blocked after only
half a turn of the crank in the clockwise
direction.
●
With the earthing switch closed, insertion
of the withdrawable part towards the
service position must be blocked after
only two clockwise turns of the crank.
In test operations, the withdrawable part must
be moved by hand with the crank 146 fitted.
1. Settings in the area of the test/disconnected
position
Do not use force !
●
Move the withdrawable part out of the
test/disconnected position towards the
service position with a few turns of the crank
146.
2. The withdrawable part must only be movable
from the service position into the test/
disconnected position with the circuit-breaker
open.
●
Slowly move the withdrawable part back
to the stop.
Check this condition as follows:
●
Auxiliary switch S8 must then operate when
the hand crank has a remaining angle of + 60
of turn to reach the stop.
With the circuit-breaker closed, withdrawal
movement of the withdrawable part must be
blocked after only half a turn of the crank
in anti-clockwise direction.
●
Slowly insert the withdrawable part from the
test/disconnected position towards the
service position until auxiliary switch S8
just operates.
3. Closing of the circuit-breaker must only
be possible when the withdrawable part is in
the defined test/disconnected position or
service position.
In this position, it must still just be possible
to move closing push rod 55.2. For this test,
the function of the blocking magnet Y0 (if
fitted) must be deactivated manually.
The control wiring plug 10.2 must previously
have been inserted.
●
Check this condition as follows:
●
It must not be possible to close the circuit
breaker with the withdrawable part in
any position between the test/disconnected
position and the service position.
●
Enabling of switching when the withdrawable
part moves into the service position
is effected electrically by operation of
auxiliary switch S9 in the breaker housing.
●
For motion into the test/disconnected
position, the same enabling conditions apply
analogously, in this case by means of auxiliary
switch S8 in the breaker housing.
This condition ensures that the electrical
interlock takes effect before the mechanical
interlock in the motion sequence involved.
2. Settings in the area of the service position
●
Move the withdrawable part out of the limit
position towards the test/disconnected
position with a few turns of the crank 146.
●
Slowly move the withdrawable part forwards
again to the stop:
●
Auxiliary switch S9 must then operate when
the hand crank has a remaining angle of + 60
of turn to reach the stop.
7.2.4 Testing of interlock conditions
(Figures 6/4, 6/6, 2/4, 2/5 and 7/2)
The testing procedures for the withdrawable part.
1. The withdrawable part must only be movable
from the test/disconnected position into the
4. It must only be possible to open the circuitbreaker (manually) when the withdrawable
p a r t i s i n t h e s e r v i c e p o s i t i o n o r test
/ disconnected position and the control voltage
has failed.
7.2.5 Breaker pole
No inspection of the breaker pole above and
25
beyond the stipulations of section 7.2.1 is
necessary.
7.3
service).
●
For replacing highly stressed parts neutralize
basic tension of the spiral spring, state the
rate. Be careful when carrying out!
●
Relubricate pawls, support shafts, sliding
and rotating bearing surfaces. Lubricant:
Isoflex
Topas NB 52.(Code GCE
0007249P0100)
●
Check the fit of fasteners (e.g. locking pins)
in cranks, pins, bolts etc. Check the tightness
of fastening bolts.
●
Always replace any spring lock washers,
split pins and other fasteners removed during
the work with new parts when reassembling
the equipment.
●
Perform comprehensive
electrical functional tests.
Servicing
7.3.1 Switching devices in general
If cleaning is found to be necessary during
inspections as set out in 7.2.1, the following
procedure is to be adopted:
●
●
Prior to cleaning, the working area is to
be isolated and secured against reclosing
where necessary in accordance with the
safety regulations.
Cleaning of surfaces in general:
-Dry, lightly adhering dust deposits with
a soft, dry cloth.
-More strongly adhering contamination
with slightly alkaline household cleanser or
Rivolta BWR 210.
●
Cleaning of the insulating material surfaces
and conductive components:
-Light contamination:
with Rivolta BWR 210.
-Strongly adhering contamination:
with cold cleanser 716.
Wipe down after cleaning, using clean water,
and dry properly.
●
Observe the manufacturer's instructions and
the special ABB instruction manuals Ba 1002/E
or BA 1006/E on safety at work.
Note:
Use only halogen free cleansers, and in no case
1.1.1-trichlorethane, trichlorethylene or carbon
tetrachloride!
mechanical
and
Note:
This work may only be performed by the aftersales service personnel of ABB Xiamen
Switchgear Limited Co. or adequately qualified
personnel.
7.3.3 Breaker pole
The breaker pole with the vacuum interrupter
is maintenance-free up to reaching the
permissible number of vacuum interrupter
operating cycles in accordance with section 2.4.
Checking of the vacuum is only necessary when
there is good cause to suspect that force applied
externally to a pole tube has caused damage to
the vacuum interrupter inside.
If the pole tube is damaged or destroyed, it may
be necessary to replace the complete breaker
pole.
7.3.2 Stored-energy spring mechanism
Servicing for 10 years or the spring mechanism
is to be performed after 10,000 operating cycles.
Prior to servicing, switch the breaker off, and isolate
the outgoing feeder.
The working life of the vacuum interrupter is defined
by the sum current limit corresponding to the
equipment data in individual cases in accordance
with section 2.4:
●
When the sum current limit is reached,
the complete breaker poles are to be replaced.
●
When the permissible number of mechanical
operating cycles (i.e. the number corresponding
to Ia = 0 on the characteristic curve) of
the vacuum interrupters has been reached,
t h e b r e a k e r p o l e s m u s t b e replaced.
However, it should be investigated before
hand as to whether the installation of a new
breaker would be more advantageous.
Observe the safety regulations!
Details of the servicing:
26
●
Swich off the charging motor (if fitted), and
discharge the spring energy storage mechanism
by closing and opening the breaker once.
●
Replace parts subject to high climatic and
mechanical stresses after 10,000 operating
cycles as a precaution (for details see ABB
Xiamen Switchgear Limited Co. after-sales
Note:
Dismantling and Replacement of the complete
breaker poles should only be carried out by ABB
Xiame Switchgear Limited Co. after-sales service
personnel or by specially trained personnel,
particularly as proper adjustment is necessary.
7.4
Repair
Only remove and reassemble circuit-breaker parts
and accessories when the breaker has been
switched off and the working area is to be isolated
and secured against reclosing. The spring energy
storage mechanism must be discharged.
All auxiliary voltage sources must be disconnected
and secured against reclosing during the removal
and installation work.
Replacement of circuit-breaker parts and
accessories
7.5
Spare parts and auxiliary materials
Designation
Item no.
Auxiliary switch
S1
(with clamp-type terminal)
S3
Rated voltage
S4
S5
Auxiliary switch on blocking magnet
S2
Auxiliary switch for fault annunciation
S7
1st shunt release OFF
Y2
2nd shunt release OFF
Y9
Shunt release ON
Y3
Blocking magnet
Y1
Undervoltage release with spring mechanism
Y4
Delayed undervoltage release with spring mechanism
Y4
Indirect overcurrent release with intermediate
current transformer and spring mechanism
Y7
Intermediate current transformer for indirect overcurrent release
Magnet holder, complete (with integrated rectifiers V1, V2, V3, V9)
Series rectifier
V4/V7
Charging motor (with gearing)
M0
Auxiliary materials
Lubricant:
Isoflex Topas NB 52
DC 24V
DC 48V
DC 60V
DC/AC 110V
DC 125V
DC/AC 220/240V
Ident no.
(order code)
GCE0007249P0100
27
51.3
10.4 10.5
54
54
51
51
10
10.1
10.2
54.1
50.6
50.7
Figure 7/1: Before moving the front plate, first disconnect the link rod
54.1 at the lower point and swing it to one side. Turn the
hand crank anti-clockwise first to move the interlock yoke
51 an appropriate distance away.
50.6
50.7
51
54
54.1
Cover plate, right hand side
Cover plate, left hand side
Interlock yoke
ON-OFF operating shaft
Link rod
Figure 7/2
Auxiliary switches for interlocking withdrawable part and
switchgear panel (withdrawable part in service position)
10
10.1
10.2
10.4
10.5
51
51.3
54
Control wiring plug connector, closed
Control wiring socket
Control wiring plug
S8, limit switch for test position indicator
S9, limit switch for service position indicator
Interlock yoke
Guiding rail (panel)
ON-OFF operating shaft
55.33
55.8
55.30
55.36
55.6
55.34
55.5
55.4
54.1
55.35
55.3
55.2
45
Figure 7/3: The spring-loaded operating mechanism in the
frame of the withdrawable part, front cover
plates removed
28
45
54.1
55.2
55.3
55.4
Magnet holder, complete
Link rod
ON push rod
OFF push rod
Switch position indicator
55.6
55.8
55.30
55.33
55.34
55.35
Socket for charging lever
Charging condition indicator
Drive shaft
Drum with spiral spring
Chain
Ratchet wheel
55.5
Operating cycle counter
55.36
Charging motor
Figure 7/4 Vacuum circuit-breaker, type VD4, for fixed installation,
stored-energy spring mechanism, front panel removed.
54.2 Mechanical ON push-button
54.3
55.4
55.5
55.8
60
63
Mechanical OFF push-button
Mechanical switch position indicator
Mechanical operating cycle counter
Charging condition indicator
Auxiliary switch block
Magnet holder, complete
Figure 7/5 Vacuum circuit-breaker, type VD4, for fixed installation,
stored-energy spring mechanism, front panel removed.
55.6 Socket (for charging lever)
55.30
55.33
55.34
55.35
55.36
Drive Shaft
Drum with spiral spring
Chain
Ratchet wheel
Charging motor
29
8
One of the physical properties of vacuum
insulations is the possibility of X-ray emissions
when the contact gap is open. The specified type
test performed by the Physikalisch-Technische
Bundesanstalt (PTB) in Brunswick demonstrates
that the local dosage output of 1Sv/h at a
distance of 10 cm from the touchable surface is
not exceeded.
The results are as follows:
30
withstand voltage specified for the switching
devices by VDE 0670 and IEC 62271-100:
2001 is also safe.
Application of the X-ray regulations
●
The use of the vacuum interrupters at rated
voltage is completely safe.
●
The application of the rated power frequency
●
Higher voltages than the rated power frequency
withstand voltage or DC test voltage specified
in DIN VDE or IEC standards must not be
applied!
●
Fulfilment of the above requirement with
the vacuum interrupter in the open position
is dependent on maintenance of the
specified distance between the contacts
(which is automatically ensured with correct
mechanism function and force transmission).
Publication No: 1YHA000093-en
236 8316
236 8308
8279 1133
8279 1236
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