Installation and service manual
NSO80/NRO80
Motor / manual operating mechanism
DTR.05.07.03.EN
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
INTRODUCTION.
Dear customer!
Thank sincerly for purchasing our product. We are glad to deliver you an operating mechanism type NSO80 /
NRO80 which has been designed in order to meet your usable needs. We are deeply convinced that advantages of the
mechanisms would be confirmed during exploitation.
The purpose of this instruction is to provide information on operating mechanism type NSO80 / NRO80 for high
voltage disconnectors and earthing switches 72,5; 123; 245; 420 kV. The instruction includes technical data, design
description and also recommendation for adjustment and service. The instruction has been issued with an intention to
help in proper installation, servicing and operation of the operating mechanisms. Follow carefully requirements
specifed in this instruction ensures troublefree service of operating mechanisms and is a condition of validity of
manufacturer's guarantee.
Carefully read and understand this instruction sheet before installation, operation and maintenance of
operating mechanism. Would you have any questions please contact ZWAE sp. z o.o.
We kindly remind basic principles of exploitation both mechanisms:
• follow strictly the principles included in this instruction,
• perform periodic inspections of mechanisms, consistent with principles included in this instruction,
• use only recommended operational materials,
• all inspections and services perform consistent with health and safety at work rules.
Observance of recommendations included in this instruction ensures permanent operating mechanism’s efficiency.
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdanska Str; 84-300 Lebork, Poland
phone / fax: +48 59 86-336-15 / 86-333-86
Web site: www.zwae.com.pl
e-mail: zwae@zwae.com.pl
1. APPLICATION.
NSO80 motor operating mechanisms are intended for HV outdoor disconnectors and earthing switches which
angular displacement is up to 192° and both closing and opening operations anti-torque is up to 800 Nm. The operating
mechanisms are compatible with disconnectors and earthing switches produced by ZWAR, operating at 110, 220 and
400 kV voltage (e.g. ONIII110..., ONI220, ONS..., UNIII110...). They replace manual or pneumatic operating
mechanisms as an upgrade of existing HV disconnectors.
2. ADAVANTAGES.
• simple design using standard elements;
• high torque, enabling operation of single- and three- pole sets of disconnectors in extreme weather
conditions (heavy icing);
• variuos auxiliary and control equipment (including 15 circuit auxiliary connector);
• possibility of remote control, electrical locking of operating mechanism's main circuit and earthing blade and
current paths difference protection;
• corrosion – resistant materials (housing made of aluminium and painted);
• high reliability;
• easy service and maintenance.
3. SERVICE CONDITIONS
Operating mechanisms are dedicated to outdoor switchgears in following ambient conditions:
a) temperature ..................................................................................................from 233 (-40 °C) up to 313 K (+40°C)
b) air humidity ...........................................................................................up to 100% with temperature 293 K (20° C)
c) altitude above the sea level ..................................................................................................................up to 1000 m
d) wind speed.............................................................................................................................................up to 30 m/s
Page 2/12
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
4. CONSTRUCTION AND OPERATING RULE.
13
10
1
5
2
3
4
6
7
11
8
9
12
The motor operating mechanism includes:
1 – Housing; 2 – Mechanism with multi-stage worm-gearing, driven by an electric motor; 3 – Control panel;
4 – Control mode switch; 5 – Control buttons; 6 – Electromagnetic locking; 7 – Secondary circuit switch: 7 NC + 8
NO contacts (free regulation and configuration) and a switch for differential protection of contact rails;
8 – Heater to evaporate water condensate from the interior; 9 – Terminal strip for connecting control and power
circuits; 10 – Limit switches, disconnecting motor power supply at specific angular displacement of the main
shaft; 11 – Motor supply control system; 12 – Cable gland unit; 13 – Drive shaft;
4.1. Housing.
The housing is made from aluminium metal sheet, species PA4, covered by powder painting epoxy color. Doors are
stuffed with silicone seal. The construction of housing is on protection level IP54 with simultaneous interior air. It has
been achieved thanks by labyrinth seal of drive shaft's output on the top of housing and using net-protected gland
hole in the bottom of housing.
4.2. Driving mechanism.
Driving mechanism consist:
–
electric motor;
–
multistage gearing;
–
worm gear;
–
gearing.
Electric motor drives the screw through the two-stage
gearing. As a result of screw rotations, a nut placed on the
screw moves along the screw, causing rotation of a
cooperating fork. On a fork shaft is settled down a gear,
which cooperates with gear fastened on a drive shaft. As a
result of application worm gear, drive shaft angular
displacement is limited to 192°. Avarage gear ratio amounts
to 375 and maximum torque amounts to 800 Nm.
Page 3/12
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
4.3. Control board.
The control board is made in the form of bar with installed control
devices. Set of control devices consist:
–
control type switch (remote – local – manual);
–
close button;
–
open button;
–
electromagnetic locking button;
–
electromagnetic locking unit (which prevents possibility put
in a crank).
At the rear side of control board has been placed
electromagnetic locking, which permits put in a crank in drive socket
only in manual steering mode (after switching on voltage at stopping
electromagnet). After pulling back electromagnetic locking
(black knob) microswitch cuts off steering voltage and prevents
starting motor with inserted crank.
In case of control board disassembly it is necessary to take care of
electromagnet coil’s location (together with dedicated microswitch) in
relation to mechanical locking’s surface. Correct coil’s location
prevents pulling off electromagnetic locking without switching on
voltage at electromagnetic locking’s coil. On the other hand, in pulled
off position, microswitch cuts off steering circuit voltage and as a
result the motor’s start is impossible.
4.4. Secondary circuit switch.
Applicated auxiliary connector includes package of 15 contacts and additional microswitch with one opening
and one closing contact dedicated to differential protection of current paths. Package of contacts are controlled by
cams, which are settled on the shaft.
Direct connection between auxiliary connector and drive shaft provides perfect representation disconnector's
position. In typical performance auxiliary connector has been configurated for 8 NO contacts, 7 NC contacts and one
pair of contacts dedicated to differential protection of current paths. Switch's configuration, especially mounting
steering cams, allows for smooth regulation of enclosing angle and reconfigurate switch at target destination.
4.5. Drive performance.
ATTENTION!
During connecting supply voltage please pay special attention maintaining supply phases
sequence. Otherwise limit switch would not switch off an impulse, which holds steering circuit
(what bring to stoppers breaking down – rubber sleeve and starting motor's termal protection).
During first run, control mode switch should be in 'local' position. Then put on operating
mechanism starting impulse (green button) – with the restriction that supply phases order is
correct, the nut at worm gear will move to the left side.
Otherwise you should immediately change control mode switch position into 'manual' mode
(cutting off steering voltage and stopping operating mechanism) and then exchange two
motor's supply phases, changing thus rotating direction.
Page 4/12
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
Switching on impulse by using green button, located in front side of control panel or remote control, causes connecting
voltage on one motor's contactor. Torque from motor shaft is transered through gearing to the drive shaft. After reaching
drive shaft angle 192°, NC contacts of limit switches are opened and motor's supply voltage is cut off. With the restriction
circumstances described above, operating mechanism is ready to work by given an impulse using second button, enabling
realisation reverse manoeuvre. During whole operating mechanism’s moving phase exists direct movement transfer on
auxiliary switch, causing its NC and NO contacts opening operation, consistent with connection diagram.
Cross locking realised with auxiliary contacts of supply voltage connectors prevents mistakenly put on voltage at motor
in opening and closing direction in the same time. In case of necessity changing operate mode into manual mode (control
mode switch in position 'manual'), pushing electromagnetic locking’s button allows stepping back the locking with
simultaneous exposing hole prepared for inserting manual crank.
4.6. Coupling shaft.
Coupling shaft enables connection between disconnector or earthing switch shaft and drive shaft. Typical coupling shaft
length is 700 or 1700 mm, and maximum deflection angle from vertically axis is 18°. The coupling shaft construction
enables easy shortening and adaptation to switchgear's assembly circumstances.
4.7. Supporting structure.
On customer's request operating mechanism could be delivered with supporting structure. Depending on performance
it enables operating mechanism to high voltage disconnector assembly. Producer does not exclude using customer
supporting structures, under circumstance their proper stiffness.
5. INSTALLATION.
5.1. Inspection the operating mechanism before installation.
Before installation make sure that the contents of motor drive plate and its equipment are under switchgear's project.
5.2. Operating mechanism to supporting structure assembly.
Before mounting operating mechanism to supporting structure one attachment bolts should be covered with
TECTYL506 oil or protection lubricant TDM. Then is permitted to mount operating mechanism to supporting structure.
5.3. Coupling with disconnectors ONIII 123 and 245 kV.
For coupling operating mechanism with disconnectors is used coupling shaft. Where driving 3-poles set with one
operating mechanism, shaft from disconnector's side ends with a 'fork' screwed on coupling mechanism by 4 screws
M12x30. While in case of 1-pole disconnector or earthing switch or coupled with existing upper coupling, the shaft ends with
socket mounted directly to crank-gear.
In case of different types of high voltage switches, coupling shaft's ending is adjusted to specific apparatus type (vertical
or pantographed disconnectors).
5.4. Operating mechanism’s control and regulation.
After finishing coupling operating mechanism with disconnector, check the operation corretctness of the auxiliary
switches, reproducing HV's switch state. In particular if:
•
disconnector's closing state is signalised not earlier than after reaching by its moving mechanisms dead position
(position in which extrnal forces effect on moving contacts do not cause their opening);
•
disconnector's opening state is signalised not earlier than disconnector's or earthing switch's moving contacts
reach way equal or greater than 80% insulation space.
Furthermore, you should also check whether the switch's contacts, dedicated to protect current paths, change when the
disconnector's contacts are in proper intermediate position. If switchgear's designer does not define in different way,
switching over should perform in accordance with operating mechanism's schematic diagram.
Moreover, electromagnetic locking's functioning should be tested. In non-voltage state, electromagnetic locking unit
successfully blocks possibility of disclosure hole to put into the manual crank. Voltage for electromagnetic locking’s coil can
be switched on only in manual control mode. Using control type switch ('manual control mode') and pressing
electromagnetic locking's button put on voltage for triggering coil and only after put off mechanical locking (black knob) is
enabled to install manual crank.
5.5. Protective earthing connection.
For earth connection is used a terminal shown on dimensions drawing. The terminal consist M12 screw and a
washer. The rail's cross section between operating mechanism and switchgear's earth connections ought to be chosen
in accordance with legal regulation in force.
Prior to the protecting earth connection to the operating mechanism’s housing carefully clean the earthing terminal's
Page 5/12
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
surface. At the end of earthing rail R13 hole for fastening screw ougth to be drilled. After smoothing surface and lubricating
the hole, using petroleum jelly, is allowed to assembly the rail to earthing terminal, with paying attention for carefully screw's
bolting on.
5.6. Connection of control and auxiliary circuits.
Control cable should be entered into housing through the gland in operating mechanism's duct plate. Connection
between control cable's wires and operating mechanism's terminal strip should be performed in accordance with proper
switchgear's project. When connecting the motor supply voltage, pay special attention to maintain correct phase sequence.
5.7. Tests before first run.
Before putting the operating mechanism into service, workmanship quality and proper interaction with the HV switch
should be checked. For that purpose, please make 10-20 electrically controlled closing and opening operations,
simultaneously watching carefully cooperation of elements. In case of finding any irregularity in the work of operating
mechanism or cooperating HV switch, the regulation of respective subassemblies and appropriate tests should be
repeated.
6. OPERATING MANUAL.
6.1. Remote manoeuvring.
Set control mode switch in 'remote' position. In that switch's position, buttons are unavailable and manual drive locking's
supply voltage is inactive.
6.2. Local manoeuvring.
Set control mode switch in 'local' position. In that switch's position, remote control is disconnected and manual drive's
locking is not power supplied. Local control's buttons are working. Pushing 'on' button causes apparatus closing. Pushing
'off' button causes apparatus opening. Improper buttons using does not cause apparatus damage or improper functioning.
6.3. Manual manoeuvring.
Set control mode switch in 'manual' position. In that switch's position, remote and local control is disconnected. Manual
drive's electromagnetic locking is ready to work.
In order to start manual drive one should:
• unbolt manual crank's socket cap (nut on the right side of operating mechanism);
• push 'blockade' button;
• pull mechanical lock (black knob);
• release 'blockade’ button;
• insert the crank;
• move crank in left or right direction, up to a nut on the screw reach location, where it switches microswitch;
• pull out the crank;
• bolt manual crank's socket cap.
7. INSPECTIONS AND MAINTENANCE.
7.1. Visual inspections.
It is recommended to carry out visual inspections once a year and after each failure or short circuit in the switchgear.
Check in particular:
a) condition of earthing clamp,
b) condition of external mechanisms,
c) condition of external parts.
7.2. Periodical check-ups.
Periodical and maintenance check-ups one should perform once in five years. During check-up and maintenance
the using of energetic devices rules and health and safety at work rules should be respected. Check in particular:
a)
condition of earthing clamp and earthing instalation;
b)
condition of mechanisms, bearings and connection components;
c)
correction of reaching limit positions;
d)
condition of auxiliary switches clamps;
e)
condition of anti-corrosion protective coatings;
f)
adhesion of door cover's sealing to housing border;
g)
heater unit.
Page 6/12
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
7.3. Spare parts and recommended service materials.
The use of high quality components and exploitation experience indicate long liveness of operating mechanisms (even
30 years). However in case of damages, the manufacturer provides spare parts in accordance to Customer's order.
Ordered spare parts could be assembled only with te producer's knowledge and agreement.
• WHITE PHARMACEUTICAL PETROLEUM JELLY (acid-free) used for lubrication electric contacts (earthings, contacts of HV switches);
• PROTECTIVE LUBRICANT TDM, in accordance with PN-64/C-96146 used for maintenance metal surfaces, ex. in deep-sea transport
(shaft's and coupling elements).
8. STORAGE AND TRANSPORT.
8.1. Shipment packing and transport.
Operating mechanisms type NSO80 are transported in cardboard packing. Operating mechanisms should be transported
in despatching packages using closed means of transport. Packages should be protected againts crashing together and
vehicle's parts and also against sudden shocks.
8.2. Storage.
After receiving the operating mechanisms, the recipient should check if:
•
the contents of data plate, version and equipment of the operating mechanism is consistent with the order and
with the usage;
•
operating mechanism has not been damaged in transport.
It is recommended to keep the operating mechanisms in closed rooms, in the atmosphere free from aggressive
chemical factors, in surrounding temperature from -25° C up to +40° C and the relative moisture not over 70%.
Additional protection for long-time transport or storage is sack with moisture-absorbing substance. It should be
removed from operating mechanism directly before switching on the heater.
9. TECHNICAL DATA.
No.
1.
Parameter
Rated voltage / rated current:
- squirrel cage motor
- series motor
- contactor’s coil of motor’s supply voltage control
(depending on motor rated voltage)
2.
3x 400 VAC / 4,5 A
220 VDC / 4 A
110 VDC / 10 A
400 VAC
220 VDC
110 VDC
- contactor’s coil
220 VDC
220 VAC
110 VDC
110 VAC
- heater
230 VAC
220 VDC
- electromagnetic locking
220 VDC
110 VDC
Rated power:
- squirrel cage motor
- series motor
- contactor’s coil
- heater
- locking electromagnet’s coil
3.
Value
Shaft torque:
- rated
- maximum
750 W
500 W
7W
25 W
7W
500 Nm
800 Nm
4.
HV switch’s operating time:
~8s
5.
Quantity of manual drive crank’s turns:
~ 100
6.
Main shaft’s angular displacement:
192o ± 2o
7.
Rated switching capability of control switch:
8.
Maximum wires cross section:
4 mm2
9.
Housing’s protection level:
IP 54
10. Operating mechanism’s weight:
11. Rated mechanical operating life:
AC-15; 230 V; 2,5 A
DC-13; 220 V; 0,25 A
~ 56 kg
~ 2000 cycles
Note: The manufacturer reserves the right to introduce some modifications owing to technological progress.
Page 7/12
Page 8/12
50
62
63
K3
S7
60
11
12
97
98
61
S3
K4
Y
4
3
14
13
12
1
13
2
K1
Crank-handle
Blocking
Work mode
mapping
Voltage decay
mapping
Heater
6
+
5
+
8
9
L2
4
2
L1
3
1
7
4
3
2
1
+
K1
M
L3
6
5
10
5
6
K4
A1
A2
3
4
1
2
manual control
local control (motor)
remote control
Switch position
1-2
Notes:
1. Shown: K3 in no voltage position
S7 in position 'manual control'
S7 - linking program
3
2
Control
4
7
8
5
6
1
S2
9
14
S1
2
95
12
12
13
11
11
14
13
close
10
2
1
4
K2
K1
S5
open
A - HV switch
1
3
96
A2
K2
44
43
Control circuit
power supply
Y - Crank-handle interlocking coil
MP
K3
A2
A1
A1
22
21
22
2
1
21
K4
2
1
44
43
Motor circuit
power supply
K1 - Closing contactor
K2 - Opening contactor
K3 - Supply voltage control contactor
K4 - Thermal relay
S1 - Closing pushbutton
S2 - Opening pushbutton
S3 - Crank-handle releasing pushbutton
S4 - Closing limit switch
S5 - Opening limit switch
MP - Crank-handle blocking switch
S6 - Current paths difference protection contact
S7 - Control mode switch (remote-local-manual)
S8 - Auxiliary switch
E - Heater
M - Asynchronous motor (3-phase)
51
E
22
21
K2
S4
K1
3-4
K3
5
6
14
15
16
7-8
4
2
5-6
K2
3
1
17
18
9 - 10
6
5
19
20
21
11 - 12
8
7
10
9
22
23
24
12
11
25
26
14
13
27
S6
S6
S8
S8
A
28
16
15
30
HV switch
CLOSED
29
18
17
S8
31
20
19
34
35
Loss
contact of
main
circuit
33
24
23
36
37
38
39
28
27
40
Reaching
required
Insulating
Gap "C"
26
25
Auxiliary contact diagram
32
22
21
41
30
29
42
44
45
HV switch
OPEN
43
4
3
S6
46
2
1
47
A
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
10. SCHEMATIC DIAGRAM OF OPERATING MECHANISM NSO80 (WITH 3-PHASE MOTOR).
50
51
E
63
K3
S7
60
11
12
97
98
61
Y
S3
K4
4
3
12
14
13
1
13
2
K1
K2
A2
A1
Crank-handle blocking
Work mode mapping
Voltage decay mapping
A - HV switch
P - Rectifier
6
+
5
+
K2
6
5
8
-
+
+
9
1
K1
2
4
3
A2
A1
-
K4
3
K2
4
A1
A2
K1
K1
K2
~
K2
K1
K3
2
2
D2
D1
1
22sp
21sp
21sp
22sp
32sp
31sp
1
P
32sp
31sp
K2
2
14
1
manual control
local control (motor)
remote contol
Connector position
S7 - linking program
1-2
S7 in position 'manual control'.
3-4
5-6
1. Shown: K3 in no voltage position on L1, L2, L3;
Notes:
4
7
3
5
M
6
5
K1
6
Motor
supply
Y - Crank handle interlocking coil
Control
4
8
3
6
2
S2
7
14
5
12
S1
1
1
K2
K1
12
13
11
11
14
13
9
95
96
A2
A1
21st
22st
S5
Close
2
2
1
4
3
21st
22st
2
Open
10
MP
K3
K4
2
1
44
K2
Control
system supply
K1 - Closing contactor
K2 - Opening contactor
K3 - Supply voltage control contactor
K4 - Thermal relay
S1 - Closing pushbutton
S2 - Opening pushbutton
S3 - Crank-handel blocking release pushbutton
S4 - Closing limit switch
S5 - Opening limit switch
MP - Crank-handle blocking switch
S6 - Busbar difference protection contacts
S7 - Control type switch (remote - local - manual)
S8 - Auxiliary switch
E - Heater
M - DC electric motor
62
22
21
S4
1
44
43
~
43
+
K1
15
16
7-8
4
3
17
18
9 - 10
6
5
19
20
21
11 - 12
8
7
10
9
22
23
24
12
11
25
26
14
13
27
S6
S6
S8
S8
A
28
16
15
30
CLOSED
HV switch
29
18
17
S8
31
20
19
32
34
35
24
23
36
37
38
39
28
27
40
41
30
29
42
Reaching required
insulating gap
"C"
26
25
Auxiliary contact diagram
Loss of
contact of
main circuit
33
22
21
43
45
OPEN
46
2
1
HV switch
44
4
3
S6
47
A
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
11. SCHEMATIC DIAGRAM OF OPERATING MECHANISM NSO80 (WITH DC MOTOR).
Heater
Page 9/12
Page 10/12
A - HV switch
37
36
35
38
MP
50
51
2
1
E
Crossed field defines microswitch's closed contact
Side socket covered (mechanical locking)
The crank inserted in side socket
MP - Interlocking coil's microswitch (linking program)
Manual operating blocking
MP - Interlocking coil's microswitch
34
Work mode mapping
Y - Interlocking coil
33
14
Y
4
2
Heater
S8 - Auxiliary switch
E - Heater
S3 - Crank-handle releasing pushbutton
S3
13
1
2
3
1
1-2
2
3
4
6
4
2
3-4
1
5
3
1
5
6
8
7
7
S8
S8
A
8
S8
9
10
11
12
11
12
13
14
13
15
Loss
contact of
main
circuit
14
16
15
16
Auxiliary contact diagram
Disconnector
CLOSED
10
9
Reaching
required
Insulating
distance "C"
A
Disconnector
OPEN
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
12. SCHEMATIC DIAGRAM OF MANUAL OPERATING MECHANISM NRO80.
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
224
168
184
204
13. DIMENSIONS DRAWING.
18°
18°
Max. 2000
18°
126
18°
787
Gland DP29
176
226
186
435
612
674
189
2 x M16
35
490
16
516
210
163
625
337
120
M12
1. Deviation of dimensions - 1,5%
2. The manufacturer reserves the right to introduce some modifications owing to technological progress.
Page 11/12
Zak³ad Wytwórczy Aparatów Elektrycznych Sp. z o.o.
60 Gdañska Str; 84-300 Lêbork, Poland
Phone / Fax: +48 59 86-336-15 / + 48 59 86-333-86
www.zwae.com.pl; e-mail: zwae@zwae.com.pl
14. NOTES.
14. NOTES.
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