Medium Voltage Switchgear
and Switches
Medium Voltage Switches up to 24 kV
Vacuum Circuit Breaker
Type: NVL
CA_508_GB_0710.book Seite 2 Freitag, 1. Februar 2008 11:31 11
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Index
Index
Page
2
Main features
3
Requirements
Application examples
Economic efficiency
Reliability of supply
High operator safety
4
4
4
4
4
Switchgear unit arrangement
5
Key to type references
6
Technical data/standards
7
Overview of modules
8
Delivery programme of vacuum circuit breakers
10
Vacuum circuit breaker equipment
11
Circuit diagram
12
Control and indicator elements
14
Notes
15
CA_508_GB_0710.book Seite 3 Freitag, 1. Februar 2008 11:31 11
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Main features
Main features
Type NVL vacuum circuit breakers are type-tested switchgear
devices for use throughout the world in medium voltage panels up to
24 kV.
• Compact design
• Simple and robust drive
• Long durability
• Low-maintenance
• High reliability
• High operator safety
• 10.000 mechanical switching operations
• Simple installation
• Ideally designed insulation for panel installation
• Options for customer-specific equipment
3
CA_508_GB_0710.book Seite 4 Freitag, 1. Februar 2008 11:31 11
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Requirements
Application examples
NVL vacuum circuit breaker is suitable for use in switching stations
for power generation and power distribution for:
•
•
•
•
•
•
•
•
•
•
•
•
•
Utility companies
Combined heat and power stations
Power distribution at buildings
Steel industry
Heavy industry
Airport power distribution systems
Automotive industry
Chemical industry
Petro-chemical industry
Food industry
Main distribution substations
Shipbuilding
Stand-by generating supplies
Economic efficiency
High operator safety
The flexibility of the standardised NVL vacuum circuit breaker with its
options for configuration to customer requirements allows it to be
functionally matched to its application. The circuit-breaker can be
extended or modified at a later date after installation.
The simple and clear arrangement of the operating and indicator
elements and optional locking elements, e.g. key locks for actuating
keys or electromechanical actuation locks, guide the user to actuate
safely.
Reliability of supply
The high quality of vacuum circuit breaker with separate
compartments for busbars, switchgear and cable connections
ensures a high degree of reliability in operation and supply for the
application. Thus the devices can be equipped, for instance, with an
auto-reclosure in order to restore availability as quickly as possible
after a fault in the mains power supply.
4
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CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Switch arrangement
Switch arrangement
The NVL vacuum circuit breaker consists of the basic switch frame,
the three switch poles and the switch mechanism. The baseframe
must be earthed via a defined fixed earthing point.
The switch poles include the vacuum switching chamber with
contact system, the contact pressure springs, the tripping springs, as
well as cast-resin parts. The cast-resin parts are for insulation,
support and protection. In addition to their insulating function, they
also absorb external forces from the switching process, contacting
and short-circuit forces. They also provide mechanical protection for
the vacuum chamber.
A stored energy spring mechanism is used as an operating
mechanism. The closing spring is charged using a crank handle or a
motor drive. During the making process, the closing spring charges
the contact pressure spring and closes the contacts. At the same
time, the tripping springs are charged. To achieve operational
capability short-time interruption, after the closing spring has been
discharged it is recharged either manually or automatically if a
motorised drive is mounted. By this means the necessary energy is
stored for a short-time interruption, such as the switching sequence
"OFF"-"ON"-"OFF".
5
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CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Key to type references
Key to type references NVL vacuum circuit breaker
The NVL circuit breaker can be equipped with a wide variety of
standardised customer options. The types of device are
differentiated in their widths, ratings and principal functions.
N. . . . .A-. . . ./. . . . /. . . . -. . . .-A
Example : NVL2A-12/25/1250-150A
Type of equipment::
VL = Vacuum circuit breaker
Type of insulating enclosure: 2, 3
6
Rated voltage:
12
17
24
= 12 kV
= 17.5 kV
= 24 kV
Rated short-circuit
breaking current
16
20
25
31
= 16 kA
= 20 kA
= 25 kA
= 31.5 kA
Rated current:
630 A
1250 A
1600 A
2000 A
2500 A
Distance between pole
centres:
150 mm
210 mm
230 mm
275 mm
CA_508_GB_0710.book Seite 7 Freitag, 1. Februar 2008 11:31 11
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Technical data/standards
Technical data for NVL vacuum circuit breaker
Rated voltage Ur [kV]
12
17,5
24
Hz
50
50
50
Rated lightning impulse withstand voltage Up
kV
75
95
125
Rated power-frequency withstand voltage Ud
kV
28
38
50
A
630
630
630
A
1250
1250
1250
A
1600
1600
A
2000
2000
A
2500
2500
Rated frequency fr
Rated normal current Ir
Optional
Rated short-circuit breaking current Isc
Optional
Rated peak withstand current Ip
Optional
Rated short-time withstand current Ik
at tk = 3 s
Optional
kA
16
kA
20
20
20
kA
25
25
25
kA
31.5
31.5
kA
40
kA
50
50
50
kA
62.5
62.5
62.5
kA
80
80
kA
16
kA
20
20
20
kA
25
25
25
kA
31.5
31.5
°C
-5 to +40
°C
+35
Average measured over 24 h maximum
%
95
Average measured over 1 month maximum
%
90
Altitude maximum
m
1000
Opening time
ms
<55
Closing time
ms
<45
Arcing time
ms
approx. 15
Rated operating sequence (for automatic reclosing)
O-0.3s-CO-15s-CO
Classification
M2, C2, E1
Ambient temperature T
Average measured over 24 h maximum
Relative humidity
Standards
NVL vacuum circuit breaker satisfy the listed VDE standards and
IEC publications:
VDE 0671 part 100
VDE 0670 part 1000 (VDE 0671 part 1*)
* in future
** so far
IEC 62271-100
IEC 62271-1 (IEC 60694**)
7
CA_508_GB_0710.book Seite 8 Freitag, 1. Februar 2008 8:27 08
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Overview of modules
Y1 Trip element ON
S1/S2 Signalling/control switch
(stored energy spring mechanism)
X1 Terminal strip
X0: Plug-in connector, 64-pole
Y2/Y5 1. Trip element OFF
Transport mount
S4 wipe contact, signal OFF
K1 Anti-pumping relay
Y7 Electric closing lock-out
Y3/Y4/Y5 2. Trip element OFF
Stored energy spring mechanism manual winding
S19 Signalling switch 1S,
mech. push-button ON activated
Y6 3. Trip element OFF
Earthing terminal
Closing spring
8/9
M1 Stored energy spring mechanism motor
Q1 Auxiliary contacts/signalling switch,
10 or 20-pole
CA_508_GB_0710.book Seite 8 Freitag, 1. Februar 2008 8:27 08
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Overview of modules
Y1 Trip element ON
S1/S2 Signalling/control switch
(stored energy spring mechanism)
X1 Terminal strip
X0: Plug-in connector, 64-pole
Y2/Y5 1. Trip element OFF
Transport mount
S4 wipe contact, signal OFF
K1 Anti-pumping relay
Y7 Electric closing lock-out
Y3/Y4/Y5 2. Trip element OFF
Stored energy spring mechanism manual winding
S19 Signalling switch 1S,
mech. push-button ON activated
Y6 3. Trip element OFF
Earthing terminal
Closing spring
8/9
M1 Stored energy spring mechanism motor
Q1 Auxiliary contacts/signalling switch,
10 or 20-pole
CA_508_GB_0710.book Seite 10 Freitag, 1. Februar 2008 11:31 11
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Delivery programme
Delivery programme
Rated voltage Ur: 12 kV
Switch types:1)
Rated voltage Ur: 17.5 kV
Switch types:1)
NVL2A-12/20/630-150A
NVL2A-12/25/630-150A
NVL2A-12/31/630-150A
NVL2A-12/20/1250-150A
NVL2A-12/25/1250-150A
NVL2A-12/31/1250-150A
NVL2A-12/20/630-210A
NVL2A-12/25/630-210A
NVL2A-12/31/630-210A
NVL2A-12/20/1250-210A
NVL2A-12/25/1250-210A
NVL2A-12/31/1250-210A
NVL3A-12/20/1600-210A
NVL3A-12/25/1600-210A
NVL3A-12/31/1600-210A
NVL3A-12/20/2000-210A
NVL3A-12/25/2000-210A
NVL3A-12/31/2000-210A
NVL3A-12/20/2500-210A
NVL3A-12/25/2500-210A
NVL3A-12/31/2500-210A
NVL2A-17/20/630-150A
NVL2A-17/25/630-150A
NVL2A-17/31/630-150A
NVL2A-17/20/1250-150A
NVL2A-17/25/1250-150A
NVL2A-17/31/1250-150A
NVL2A-17/20/630-210A
NVL2A-17/25/630-210A
NVL2A-17/31/630-210A
NVL2A-17/20/1250-210A
NVL2A-17/25/1250-210A
NVL2A-17/31/1250-210A
NVL3A-17/20/1600-210A
NVL3A-17/25/1600-210A
NVL3A-17/31/1600-210A
NVL3A-17/20/2000-210A
NVL3A-17/25/2000-210A
NVL3A-17/31/2000-210A
NVL3A-17/20/2500-210A
NVL3A-17/25/2500-210A
NVL3A-17/31/2500-210A
1)
Key to type references → page 6.
a
Rated voltage Ur: 24 kV
Switch types:1)
3)
NVL2A-24/16/630-210A
NVL2A-24/20/630-210A
NVL2A-24/25/630-210A
NVL2A-24/16/630-230A
NVL2A-24/20/630-230A
NVL2A-24/25/630-230A
NVL2A-24/16/1250-230A
NVL2A-24/20/1250-230A
NVL2A-24/25/1250-230A
NVL2A-24/16/630-275A
NVL2A-24/20/630-275A
NVL2A-24/25/630-275A
NVL2A-24/16/1250-275A
NVL2A-24/20/1250-275A
NVL2A-24/25/1250-275A
3)
3)
3)
3)
3)
3)
3)
3)
3)
3)
3)
3)
3)
3)
c
a
f
h
d
e
106
164
g
16
b
Technical data and dimensions2):
Rated voltage Ur [kV]
12
17.5
24
Distance between pole centres a mm
150
210
210
1503)
210
2103)
2103)
2303)
275
Rated normal current Ir
630
630
1600
630
630
1600
630
630
630
1250
1250
2000
1250
1250
2000
1250
1250
A
2500
Type of insulating enclosure
2
2
3
2
2
3
2
2
2
b
435
555
555
435
555
555
555
595
685
c
370
370
390
370
370
390
431
431
431
d
594
594
594
594
594
594
594
594
594
e
255
255
300
255
255
300
255
255
255
f
198
198
153
198
198
153
198
198
198
g
66
66
66
66
66
66
66
66
66
h
402
402
402
402
402
402
402
402
402
2)
3)
4)
Additional technical data → page 7.
possible additional insulation plates (phase insulation) required in the panel; not included in the scope of delivery
In development. Date of delivery on request.
Dimensions
10
2500
mm
3)
3)
3)
3)
3) 4)
3) 4)
3)
3) 4)
3) 4)
CA_508_GB_0710.book Seite 11 Freitag, 1. Februar 2008 11:31 11
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Equipment for vacuum circuit breaker
Equipment for vacuum circuit breaker
Type: NVL....A-....../......./......... - ........A
Standard equipment:
charged spring drive with manual actuation
Example: NVL2A-12/25/1250-150A
1. trip element "OFF"
auxiliary contacts 5 NO + 5 NC (up to 4 NO + 5 NC free
available)
mechanical switching operation counter
mechanical push-buttons "ON" and "OFF"
mechanical position indicator
mechanical spring charge indicator
Additional equipment:
64-pin plug connector with mechanical interlocking
motorised accumulator drive incl. trip element "ON",
annunciator switch for spring charging, anti-pumping relay
2. trip element "OFF"
3. trip element "OFF" with auxiliary contacts, extension 5 NO +
5 NC
transformer operated trip, alternative to 1. or 2. trip element
undervoltage release, 100 V AC (non-delayed) alternative to
2. trip element
auxiliary contact extension 5 NO + 5 NC
signalling switch spring accumulator tensioned
electric closing lock-out
fleeting contact switch message "OFF"
key interlocking for mechanical OFF-push-button
key interlocking for mechanical ON-push-button
signalling switch "mech. ON-push-button activated"
Auxiliary voltages for circuit-breaker
24 V DC
48 V DC
60 V DC
110 V DC
220 V DC
110 V AC
230 V AC
Motorised drive, stored energy spring
mechanism
1. trip element "Off"
2. trip element "Off"
3. trip element "Off"
trip element "On"
electric closing lock-out
11
CA_508_GB_0710.book Seite 12 Freitag, 1. Februar 2008 11:31 11
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Circuit diagram
Circuit diagram
Motor
X0
X1
S1
X0
A1
X0
X1
Q1
Y2
Y3
Y4
V4
Y5
V5
Y6
Y1
K1
M1
S1
S2
S4
S6
S19
S5
S7
A3
X1 3
1
1
Description:
ON
with anti pumping relay
4
S1
2
3
M1
11/13
21
M
~
K1
22
14
2
S2
1
12 24
Q1
11 23
X1 5
Y1
X1
2
X1
X0
A2
X0
OFF (1)
OFF (2)
X0
X0
X1
A5
7
X1
A1
K1
A2
Y7
V7
6
Plug-in connector 64-pole
Terminal strip
Auxiliary switch
1. trip element OFF
2. trip element OFF
Undervoltage release OFF (alternative to Y3)
Rectifier for Y4
Transformer operated trip OFF (alternative to Y2 or Y3)
Rectifier for Y5
3. trip element OFF
Trip element ON
Anti-pumping relay
Stored energy spring mechanism motor
Control switch (ON release and motor)
Signalling/control switch (spring accumulator tensioned)
Fleeting contact switch, message OFF
Fleeting contact break (in case of local actuation)
Signalling switch, mech. ON-push-button activated
Control switch, interlocking of el. switching on (with drawer unit only)
Control switch, release interlocking of el. switching on (in conjunction
with Y7 only)
Electric closing lock-out
Rectifier for Y7
A4
OFF (3)
alternative trip element
OFF (2)
alternative trip element
OFF (2) if necessary (1)
electric closing
lock-out
A7
X0
D1
X0
C5
X0
A9
X0
C7
16
X1
31
X1
19
X1
21
X1
29
<U
14
Q1
13
64
54
Q1
Q1
53
Y4
V4
63
Y7
V7
I>
Y5
X1
8
Y2
X1
X0
9
A6
1. trip element
12
17
V5
32
Y3
Y6
X1
18
X1
33
X1
20
X1
22
A8
X0
D2
X0
C6
X0
A10
X0
2. trip element
3. trip element
Undervoltage release
(non-delayed)
Transformer
operated trip
X1
30
X0
C8
with control switch S7
(integrated in
„ON"-release path)
CA_508_GB_0710.book Seite 13 Freitag, 1. Februar 2008 11:31 11
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Circuit diagram
Fleeting contact
switch message
"OFF"
ON-push-button
actuated
Spring accumulator tensioned
Messages
X0 C3
C1
Auxiliary contacts
Availability optional
Consider the assembled trip elements
X0 B1
26
B9
1
Signal
Plug-in connector
X1 15
B7
B4
C11
4
S2
X0 C11 A13 B11 B15
3
C15
D15
A11 A15 B13 C13
Q1
S19
1
1
4 S6
3
22 64 32 54 42 52
62 72
74
82 84
92
94
102 104
21 63 31 53 41 51
61 71
73
81 83
91
93
101 103
A12
4
S4
X1 16
27
D16
1
2
C10
X0 C4
A16 B14 C14
X0 C12 A14 B12 B16 C16
X0 B2
B5
B8
B3
C2
B10
B6
13
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CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Operating and display elements
Operating and display elements
The operating and display area is located on the front side of the
vacuum circuit breaker.
All functional elements, e.g. the mechanical push-buttons for
switching on and off, the indicator for the switch position and the
stored energy spring mechanism are clearly arranged in order to
ensure simple operation.
The operating push-buttons can be equipped with optional key
interlocking devices.
Operation opening for manual winding up
of spring accumulator
Push-button ON
Spring charge indicator
Push-button OFF
mechanical switching operation counter
Switch position indicator
Optional key interlocking devices for ON/OFF
push-buttons
14
CA_508_GB_0710_04.fm Seite 15 Freitag, 22. Februar 2008 2:33 14
CA⋅508⋅GB⋅0710
Medium voltage switches up to 24 kV, Vacuum circuit breaker type NVL
Notes
Notes
15
Technical-Commercial Department
Tel.: +34 94 431 87 31
Fax: +34 94 431 87 32
E-Mail: oib@ormazabal.com
SF6-insulated switchgear
Type
Type
Type
Type
GA
GAE
CPG.0
CPG.1
Air-insulated switchgear
Type EA
Type AMC
Air-insulated switches
Type NVL
Type KL(F), T, DES
Subject to alteration
CA 508 GB 0710