ZWAE ONIIIS Manual

INSTALLATION AND SERVICE MANUAL
Zakład Wytwórczy Aparatów Elektrycznych Sp. z o.o.
ONIIIS
Outdoor disconnector
Manual No DTR.01.03.02.EN

Zakład Wytwórczy Aparatów Elektrycznych Sp. z o.o.
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zwae.com.pl
WARNING!
During the operation of electrical equipment, certain parts of
these devices are normally under dangerous voltage, and me-
chanical parts, also remotely controlled, can move quickly.
Failure to follow the warning instructions can result in serious
personal injury or material damage.
Only suitably qualied personnel can work on or near the device.
This personnel must know exactly all safety rules and rules for
maintaining the device in accordance with these instructions.
The problem-free and safe operation of this device requires
proper transport, proper storage, construction and assembly as
well as careful service and maintenance.

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Table of contents
1. TRANSPORT AND STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Unpacking and inspection ..............................4
1.2. Transport and storage. ................................6
2. DESCRIPTION ........................................ 6
2.1. Application ...........................................6
2.2. Construction and principle of operation. ..................7
2.3. Ambient conditions during operation .....................8
2.4 . Nameplate. ..........................................9
3. ACCESSORIES, ADDITIONAL EQUIPMENT ................. 10
4. INSTALLATION AND ADJUSTMENT ...................... 13
4.1. Preparation of the supporting structure and assembly
ot the disconnector........................................13
4.2. Connecting feeding wires and grounding wire .............14
5. OPERATING MANUAL ................................. 15
5.1. Periodic inspections ...................................15
5.2. Permitted repairs carried out by the user. .................16
6. MAINTENANCE ....................................... 16
6.1. Regular tests .........................................16
7. UTILIZATION ......................................... 17

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1. TRANSPORT AND STORAGE
1.1. Unpacking and inspection
Immediately after receiving the outdoor disconnector, the delivery's compliance with the packing list should be
checked. Then one should check whether the apparatus has not been mechanically damaged during transport
and the data on the nameplate match the order.
Disconnectors are delivered on a transport pallet, to which they are screwed. When transporting the discon-
nector, excessive shocks should be avoided. Disconnectors are delivered to the customer in a completely
assembled and adjusted condition.
Before moving the disconnector from the pallet to
another place, four screws have to be unscrewed.
Disconnector should be moved by grabbing the
base frame. It is unacceptable to lift the disconnec-
tor by grabbing the current paths.
Figure 1 ONIIIS disconnector on the transport pallet screwed with screws.

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WARNING !
In case of disconnector equipped with earthing knives,
the fastening screws (item 3) of the blockade ring (item
2) mounted on earthing knives's shaft, are loosen for de-
livery time, what allows the earthing knives to be closed
(with closed disconnector's current path).
After unpacking the disconnector at the recipient, the
earthing knives (item 1) should be open leaving the cur-
rent path closed and the blockade ring should be re-posi-
tioned (item 2) and the screws tightened (item 3).
1
32
Figure 2 Regulation of disconnector’s earthing switch.

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1.2. Transport and storage.
The disconnectors can be transported to a place of storage and installation by any means of transport. During
transport, the disconnectors should be secured against moving and colliding with each other or parts of the
vehicle. It is not allowed to set the disconnectors directly on top of each other. It may damage the disconnector.
The disconnector should be moved using straps as shown in the gure below.
Disconnectors should be stored indoors, in an atmosphere free from aggressive chemical agents.
2. DESCRIPTION
2.1. Application
The outdoor disconnectors of type ONIIIS are intended for usage in outdoor 24 kV and 36 kV switchgears. They
are designed to close and open electrical circuits in a off-load condition. In the open position disconnectors cre-
ate a visible insulation gap in the air, thus meeting the relevant requirements of standards for disconnectors.
Figure 3 The way of moving the disconnec-
tor using straps.

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2.2. Construction and principle of operation
The ONIIIS disconnectors are switches with a vertical movement of knifes of the current path. The base frame
of the disconnector (item 1) is a welded steel frame in which sides the main shaft (item 2) is mounted. On the
transverse shelves of the base frame there are porcelain support insulators (item 3), on which there is a dis-
connector's current path consisting of two xed contacts (item 4) bolted to the insulators and movable contact
(item 5). The movable contacts of the current path are connected to the main shaft by the driving insulator
(item 6). The rotary movement of the main shaft is transmitted through the driving insulator to the movable
contacts, causing them to move in a plane perpendicular to the base frame. The pressure of the knives on the
contacts is ensured by springs (item 7). The disconnectors have an earthing point to connect the grounding
connection (item 8).
Figure 4 Outdoor disconnector type ONIIIS-24/800 (24 kV,800 A)
8
2
1
4
75
4
3
6

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Ø14 Ø14
15 32
15 32
20
Ø13
40
80
17 32
Ø13
60
60
52
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2.3. Ambient conditions during operation
The ONIIIS disconnectors are adapted for outdoor operation, at ambient temperature from -40 to +40 ° C and
relative humidity to 100%.
Figure 5 Types of terminals of ONIIIS type disconnector
Disconnector:
ONIIIS-24/800
ONIIIS-36/800
Disconnector:
ONIIIS-24/1600
ONIIIS-24/2000
ONIIIS-36/1600 Disconnector:
ONIIIS-24/2000
Disconnector:
ONIIIS-36/2500

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2.4. Nameplate
5
6
7
8
3
2
963 8 410
1
1. Manufacturer
2. Year of production
3. Rated current Ir=800 A
4. Rated duration of short-circuit tk[s]
5. Serial number
6. Rated operating voltage Ur[kV]
7. Surge test voltage Up[kV]
8. Rated short-circuit current Ik[kA]
9. Number of poles
10. Creepage distance, 17 mm/kV

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3. ACCESSORIES, ADDITIONAL EQUIPMENT
1. ONIIIS disconnector
2. Manual sliding operating mechanism NNP with x-
ing
3. Coupling tie rod
4. Supporting bracket
Figure 6 ONIIIS type disconnector with NNP operat-
ing mechanism mounted on the ZN pillar
1
5
4
3
2