ABB OVR-15 Operation and maintenance manual

—
DISTRIBUTION SOLUTIONS
OVR-15, 27 & 38 outdoor vacuum recloser
High voltage unit
Instruction, operation, and maintenance manual

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Instruction Manual for HV Unit of OVR-15, 27 & 38
Copy Right
This manual and parts thereof must not be reproduced or copied without written permission from
ABB, and the contents thereof must not be imparted to a third party, nor used for any unauthorized
purpose.
Disclaimer
The data, examples and diagrams in this manual are included solely for the concept or product
description and are not to be deemed as a statement of guaranteed properties. All persons
responsible for using the equipment addressed in this manual must satisfy themselves that each
intended application is suitable and acceptable, including that any applicable safety or other
operational requirements are compiled with. In particular, any risk in applications where a system
failure and/or product failure would create a risk for harm to property or persons (including but not
limited to personal injuries or death) shall be the sole responsibility of the person or entity applying
the equipment and those so responsible are hereby requested to ensure that all measures are taken
to exclude or mitigate such risks.
This product has been designed to be connected to medium voltage distribution networks. It is the
sole responsibility of the person or entity responsible for the network administration to ensure a
secure connection to the network and take necessary measures to protect the product and the
network, its system and interface included against any kind of security breaches, unauthorized
access, interference, intrusion, leakage and /or thefts. ABB is not liable for any such damages and/or
losses.
This product is intended to be operated and maintained by qualified personnel, thoroughly trained
and knowledgeable with regards to the associated hazards involved. This publication is written only
for such qualified personnel and is not intended to be a substitute for adequate training and
experience in the safety procedures for this device.
This document has been carefully checked by ABB, but deviations cannot be completely ruled out. In
case any errors are detected, the reader is kindly requested to notify the manufacturer. Other than
under explicit contractual commitments, in no event shall ABB be responsible or liable for any loss or
damage resulting from the use if this manual or the application of the equipment.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
1CONTENTS
A. Introduction..........................................................................................................................................6
B. Environmental protection program ................................................................................................6
C. X-ray emission standards..................................................................................................................6
D. End of life recycle/disposal............................................................................................................... 7
E. Product related safety notices......................................................................................................... 7
F. Working on HV cabinets and mandatory safety procedures. ...................................................8
G. Warning Texts and Symbols..............................................................................................................9
2Packing and transport......................................................................................................................10
3Receipt and Storage prior to installation .....................................................................................11
4Technical details ................................................................................................................................14
5General Description of ovr-15, 27 & 38 recloser.......................................................................... 16
5.1.1 Housing........................................................................................................................................................................ 16
5.1.2 Recloser Pole and current & voltage sensor ........................................................................................................ 17
5.1.3 Current & voltage sensor ......................................................................................................................................... 17
5.1.4 Single Coil Magnetic Actuator ................................................................................................................................ 18
5.1.5 Emergency Manual Trip (k69) Handle ................................................................................................................... 18
5.1.6 Mechanical ON/OFF position Indicator................................................................................................................ 18
5.1.7 Status Auxiliary limit switches................................................................................................................................ 18
6Standard production tests.............................................................................................................. 19
7Installation .......................................................................................................................................... 19
7.1.1 Vacuum test procedure............................................................................................................................................20
7.1.2 Contact Resistance ...................................................................................................................................................20
7.2.1 Pole mounting............................................................................................................................................................ 21
8Recloser operation ............................................................................................................................ 27

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Instruction Manual for HV Unit of OVR-15, 27 & 38
9Inspection and maintenance ..........................................................................................................28
10 Typical rating plate details..............................................................................................................30
11 GA of HV cabinet drawings ............................................................................................................. 31
11.1.1 OVR-15 HV Cabinet General Arrangement: .......................................................................................................... 31
11.1.2 OVR-27 HV Cabinet with Single Voltage Sensing General Arrangement: ......................................................32
11.1.3 OVR-27 HV Cabinet with Double Voltage Sensing General Arrangement: ....................................................33
11.1.4 OVR-38 HV Cabinet General Arrangement:..........................................................................................................34
12 Recommended spare parts.............................................................................................................35

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Instruction Manual for HV Unit of OVR-15, 27 & 38
For your safety!
- Make sure that the installation place & environment is suitable for the electrical
apparatus.
- Check that all the installation, putting into service and maintenance operations
are carried out by qualified personnel having relevant knowledge of the
apparatus.
- Make sure that the standard and legal prescriptions are complied with during
installation, putting into service and maintenance, so that installations
according to the rules of good working practice and safety in the workplace are
constructed.
- Strictly follow the information given in this instruction manual.
- Ensure that the rated performance of the apparatus is not exceeded during
service.
- Ensure that the personnel operating the apparatus have this instruction
manual to hand as well as the necessary information for correct intervention.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
A. INTRODUCTION
This manual contains the information needed to install HV unit of OVR-15, 27 & 38 Auto-recloser and put
them into service.
For correct use of the product, please read this manual carefully along with instruction, operation, and
maintenance manual for low voltage unit.
OVR-15, 27 & 38 reclosers are designed for different installation configurations. However, the mounting
structure for this apparatus allows further technical-construction modifications (at the customer’s
request) to adapt to special installation requirements. Consequently, the information given below may
sometimes not contain instructions concerning special configurations.
Apart from this manual, it is therefore always necessary to consult the latest technical documentation
(electric circuit and wiring diagrams, assembly and installation drawings, any protection coordination
studies, etc.), especially regarding any variants requested in relation to the standardized configurations.
Only use original spare parts for maintenance operations. For further information, please refer
recommended spare part list mentioned in this manual.
All the installation, putting into service, running and maintenance operations must be carried out by
skilled personnel with in-depth knowledge of the apparatus.
B. ENVIRONMENTAL PROTECTION PROGRAM
The OVR-15, 27 & 38 reclosers are manufactured in accordance with the ISO 14000 Standards (Guidelines
for environmental management).
The production processes are carried out in compliance with the Standards for environmental protection
in terms of reduction in energy consumption as well as in raw materials and production of waste
materials. All this is thanks to the medium voltage apparatus manufacturing facility environmental
management system.
C. X-RAY EMISSION STANDARDS
One of the physical properties of vacuum is the possibility of X-ray emission when the interrupter
contacts are open & subjected to high voltage. Specific tests carried out shows that local emission at a
distance of 10 cm from the Interrupter or pole surface does not exceed 1mSv/h.
It follows that:
At the rated service voltage, use of vacuum interrupter is absolutely safe.
Application of the withstand voltage at industrial frequency, according to the IEC 62271 - 111 standard, is
safe.
Application of a voltage higher than the power frequency withstand voltage at the industrial frequency or
direct current specified in the IEC standard, may cause permanent damage to the unit and it is out of the
guaranteed operating limits.
Limitation of the above-mentioned local phenomena, with interrupters with open contacts, depends on
keeping the specified distance between the contacts. This condition is intrinsically guaranteed by correct
operation of the operating mechanism and adjustments of the transmission system.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
D. END OF LIFE RECYCLE/DISPOSAL
ABB is committed for complying with relevant legal and other statutory requirements for environment
protection according to the ISO 14001 standard. The duty of the end user is to facilitate end of life
recycling & disposal according to the applicable regulations.
During disposal of product, it is necessary to act in according with local legal requirements in force.
Disposal can either be carried out thermally in an incineration plant or by storing on a waste site.
Following are the methods of recycle/disposal:
Table 1 : Recycle/disposal methods
Raw Material
Recycle
Environmental effects & reuse processes
Iron
Yes
Separate, utilize in favor of new source (ore)
Stainless steel
Yes
Separate, utilize in favor of new source (ore)
Copper
Yes
Separate, utilize in favor of new source (ore)
Brass
Yes
Separate, utilize in favor of new source (ore)
Aluminum
Yes
Separate, utilize in favor of new source (ore)
Zinc
Yes
Separate, utilize in favor of new source (ore)
Thermoplastic
Yes
Make granulate, re-use or apply as energy superior
Epoxy incl. 60% quartz
Yes
additive in refuse incineration
Rubber
Yes
Cut into pieces & use as high-grade energy
Porcelain
Yes
additive in cement mill
Packing foil
Yes
Cut into pieces & used for landfills
Wooden pallet
Yes
High grade energy additive in refuse incineration
E. PRODUCT RELATED SAFETY NOTICES
The OVR-15, 27 & 38® recloser should be installed within the design limitations as described on its
nameplate and in these instructions. In addition, always follow your company’s safety procedures.
This recloser should not be used by itself as the sole means of isolating a medium voltage circuit. For the
safety of the personnel performing maintenance operations on the recloser or connecting equipment, all
components should be electrically disconnected by means of a visible break and securely grounded.
This manual uses terms “ground” & “grounding” as per IEEE. These are equivalent to IEC terms
“earth” and “earthing”.
This manual contains terms and expressions commonly used to describe this kind of equipment.
These instructions do not attempt to provide the user of this equipment every possible answer to
questions which may appear in the application, operation, and maintenance of the product.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
Detailed descriptions of standard repair procedures, safety principles, and service operations are not
included. It is important to note that this document contains some warnings and cautions against some
specific service methods that could cause personal injury to service personnel or could damage
equipment or render it unsafe. These warnings do not cover every conceivable method in which service
(whether or not recommended by ABB) may be performed.
Secondly, ABB cannot predict or investigate all potential hazards resulting from all conceivable service
methods. Anyone using service procedures or tools, whether or not recommended by ABB, must be
completely certain that both their personal safety and the safety of the equipment will not be jeopardized
by the service method or tools selected.
All information contained in this manual is based on the latest product information available at the time
of printing. The right is reserved to make changes at any time without notice.
Also, as improvements in assemblies and parts are made, some parts may differ in appearance that
depicted in illustrations; however, functionality will be equivalent.
F. WORKING ON HV CABINETS AND MANDATORY SAFETY
PROCEDURES.
Whenever it is required to work on HV &/or LV units, it is mandatory to follow following minimum
procedures:
a. Isolate the recloser from power system on its both sides. Put recloser in OPEN condition by
operating the emergency manual trip handle (yellow handle).
Once recloser is opened, the handle gets locked & blocks close operation both electrically &
mechanically till the handle is reset to its original (not operated) position.
b. Confirm the OPEN status of the recloser from the mechanical ON/OFF indicator, from SLD on LCD
display & the indication LEDs on RER615 HMI.
c. Always put the SERVICE /DISCHARGE selector switch in the LV cabinet to DISCHARGE position.
d. Follow the safety warning instructions on various warning labels provided on the LV & HV units
e. Remove the control cable from both HV & LV cabinets & cover the 24 pin male connectors by plastic
caps provided.
Although warning hazards are related to personal injury, it is necessary to understand that under certain
operational conditions, operation of damaged equipment may result in degraded process performance
leading to personal injury or death. Therefore, comply fully with all warning and caution notices.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
Danger
Warning
Caution
Note
Important
G. WARNING TEXTS AND SYMBOLS
Warning texts mentioned are stated based on different degrees of urgency, which should be carefully
observed. These are described below.
Danger Indicates an immediate risk situation that can lead to
death or serious personnel injury if not avoided
Warning Indicates an immediate risk situation that can lead to
death or serious personnel injury if not avoided
Caution Indicates a risk situation that can lead to small or
moderate damage
Note is used when there is a danger that can lead to equipment
damage only.
Important indicates an operation or a suggestion for handling.
Warning Symbols
Following warning symbols may appear on warning sticker as a part of the product.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
2PACKING AND TRANSPORT
GOODS MARKING
The recloser is transported in “Contact OPEN” position. The factory assembled recloser may be
transported in different packing cases for HV unit, LV unit and mounting brackets. Each case is marked
with case markings on two sides with indelible black ink. The case markings include information of case
number, gross weight, etc.
Optional accessories like auxiliary power voltage transformer, terminal connectors, etc. might be
transported in a separate case.
In addition to the above, the cases are marked with the following symbols. These should be observed
when choosing lifting equipment.
Figure-1 : General symbols on packing case
DOCUMENTS
Documents provided with the recloser during dispatch.
- Instruction manual
- Routine test certificate
- Drawings
- Packing list
- Other documents as mutually agreed in contract with ABB
TRANSPORT AND LIFTING
The recloser shall be transported in packed condition only. Before lifting the case, observe the
information on it (such as symbol, weight, etc.).
Following precautions are to be taken while lifting:

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Instruction Manual for HV Unit of OVR-15, 27 & 38
- Ensure that packing cases are not placed on wet surfaces / waterlogged areas.
- Reclosers should not be stacked one over the other.
- Reclosers should be lifted by a lifting device equipped with forks or slings. If a crane is used, slings
shall be used. The units must not be rolled or dropped.
Figure-2 : Packing case lifting arrangement
3RECEIPT AND STORAGE PRIOR TO INSTALLATION
RECEIPT OF RECLOSER
Each recloser is assembled and tested at the factory. Prior to shipment, the equipment is thoroughly
inspected to ensure a quality product free from defects. If damage is noticed, call the carrier at once for
inspection, and request an inspection report. Afterwards, file a formal claim with the carrier, supported
with the Airway/Roadway Bill.
Each delivery, on receipt, should be checked for,
- Shortages and discrepancies. (Check against order and delivery documents).
- Any transit damage and material losses.
- Abnormality, if any, must be notified immediately to ABB, forwarding agents and the insurance
company.
Instructions and literature packed with the recloser should be kept with the unit. Additional copies may
be obtained upon request from the local ABB sales office. Following are the typical parts in which
recloser are generally shipped from factory.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
Default Shipment
High voltage (HV) cabinet
Control cable (length as per order specific drawings)
Optional items
(only if ordered separately)
Mounting brackets
Auxiliary power cable (2x1.5 sq.mm)
Terminal connectors for main power cable connections
Insulating boots for main power connections
Auxiliary power voltage transformers
Any additional spares
STORAGE OF RECLOSER
The recloser with complete packing should always be stored indoor to protect from direct sunlight & rain
or snow. The recloser should be stored in its original transport units, where they are well protected from
damage.
Reclosers can be stored up to 3 months from date of shipment from the factory. For longer storage, the
packing needs to be removed and the recloser to be kept under controlled environmental conditions.
We define storage in controlled conditions as a place with:
- Leak proof roof
- Solid, flat ground
- Relative humidity less than 50%
- Temperature 20 0C (+10oC)
- The heating elements must be connected to the electric supply to protect the control equipment
from corrosion or freezing damage.
Structures may be stored outdoors with proper care by avoiding any water accumulation or soil
deposition. Spare parts should be stored indoors in their original packing.
The HV cabinets must be stored in the upright position to avoid moisture
accumulation.
Recommended storage temperature range is -20oC to + 40oC.
If the recloser is not placed in service immediately, it is essential that proper care be
exercised in handling and storage to ensure good operating condition in the future.
Please consult ABB if the recloser will be in storage for an extended period of time
before installation.
Important
Note

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Instruction Manual for HV Unit of OVR-15, 27 & 38
Caution
Caution
Caution
Caution
Caution
HANDLING
Each HV cabinet come with lifting brackets on the sides of these cabinets for lifting. A four-point lift is
strongly recommended using the loops in these brackets. The approximate mass in Kg is separately
mentioned on rating plates on HV cabinets.
Figure-3 : HV cabinet lifting details
Exercise care during lifting to avoid damage to the poles
Do not place the recloser HV unit on an uneven surface. Placing the HV unit on an uneven
surface may cause tilting / galling of the HV unit causing damage to the equipment and
injuries to the person nearby
Spreader bar should be used if necessary, to ensure lifting straps do not press against and
damage the poles, & mechanical ON/OFF indicator.
Do not use forklift to move recloser as it may damage the mechanical ON/OFF position
indicator, Yellow Trip handle and associated interlock
Exercise care during lifting to avoid damage to the poles

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Instruction Manual for HV Unit of OVR-15, 27 & 38
4TECHNICAL DETAILS
This operating instruction is applicable for medium voltage, three phase mechanically ganged operated
vacuum reclosers OVR-15, 27 & 38 HV Unit.
Each OVR-15, 27 & 38 Recloser has three vacuum interrupters, each assembled in pole casted with an
advanced Hydrophobic Cycloaliphatic Epoxy (HCEP). Together with the specialized control functions, the
recloser will sense a pickup current (or other pre-configured condition) and automatically open, or “trip”.
After a pre-configured Open Interval Time, the recloser will close again. If the tripping condition still
exists, the recloser will trip again and reclose. OVR-15, 27 & 38 can be reclosed up to three times in one
operating cycle.
The standard OVR-15, 27 & 38 recloser control, RER615, will allow up to three closing operations before
the recloser will “lock out” in the open position.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
TABLE 1:TECHNICAL DATA SHEET FOR OVR-15, 27 &38
Sr.
No.
Technical Characteristic
OVR-15
OVR-27
OVR-38
1
Installation
Outdoor, Pole / substation mounting
2
Suitable as standard
IEC 62271-100 / IEEE C37.60
3
Rated system voltage
15 kV
27 kV
38 kV
4
Rated frequency
50 / 60 Hz
5
Nominal current at 40 OC ambient
630 Amps
1000 Amps
1200 Amps
6
Short time current withstand capability
12.5 kArms for 3 sec
12.5 kArms for 3 sec
16 kArms for 3 sec
7
Fault current breaking capability
12.5 kArms
12.5 kArms
16 kArms
8
Making current capability
32.5 kAp
32.5 kAp
41.6 kAp
9
One minute power frequency withstand
capability (Dry / Wet )
50 kVrms / 45 kVrms
60 kVrms / 50 kVrms
70 kVrms / 60 kVrms
10
Lightning Impulse voltage withstand
capability
110kVp
125kVp
170kVp
11
Switching of line charging current
2 A
5 A
5 A
12
Switching of Cable charging current
10 A
25 A
40 A
13
Operating sequence (Reclosing
Sequence)
O –0.2 s –CO –2 s –CO –2 s –CO - Lockout
14
Closing time
≤65 ms
15
Opening time
≤40 ms
16
Number of operations at rated current
10000 CO (With proper periodic maintenance the unit can perform
up to 25000 CO operations)
17
Insulating Material of Poles
Hydrophobic cycloaliphatic epoxy insulator
18
Type of operating mechanism
Magnetic actuator
19
Minimum Creepage distance
481 mm
960 mm
1178 mm
20
Center to center distance between
phases
394 mm
394 mm
394 mm
21
Mass of the Auto Recloser Excluding
Mounting Frame (Approx.)
140 kg
145 Kg
180 Kg
22
Protection class for cabinet (HV & LV)
IP55
23
Maximum load on foundations
(inclusive of the mass of the recloser)
11600 N –Compression (open operation)
7000 N –Tension (close operation)
24
Suitable for wind Speed up to
200 km/Hr.
25
Ambient Temperature range
-40 0C to +55 0C
For other technical details, please refer the order specific drawings.

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Instruction Manual for HV Unit of OVR-15, 27 & 38
5GENERAL DESCRIPTION OF OVR-15, 27 &38 RECLOSER
HIGH VOLTAGE ASSEMBLY
The high-voltage assembly of the OVR-15, 27 & 38 consists of three poles mounted onto a common
housing. Each of the poles is a separate assembly comprised of a vacuum interrupter assembled in a
HCEP molded pole. All the three poles are gang operated by a single coil magnetic actuator through a
common operating shaft.
5.1.1 Housing
The housing comprises of a stainless steel enclosure. The bottom cover of the housing is removable.
Housing is provided with legs for safe transportation and storage. These legs are not meant to be used
for mounting the recloser on its structure.
The HV unit has its dedicated name plate showing important rating information, serial number of HV
unit and manufacturing year is mounted on the front side of the HV cabinet. The ON/OFF position
indicator is also provided in the front side and is visible from ground.
A 50 W heater is provided in the high voltage cabinet, to prevent condensation and must be energized at
all times.
Fig-5.1: OVR-15 HV cabinet overview
Figure-5.2 : OVR-27/38 HV cabinet overview

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Instruction Manual for HV Unit of OVR-15, 27 & 38
5.1.2 Recloser Pole and current & voltage sensor
Each of the three recloser poles consists of vacuum interrupter inside a pole cast with an advanced
Hydrophobic Cycloaliphatic Epoxy (HCEP). The upper and lower terminals for connecting medium
voltage power conductors are made of ETP copper.
5.1.3 Current & voltage sensor
The current (I) sensing is by current transformer (CT) and voltage (U) sensing is by a voltage divider. The
sensor secondary connections are bought out of the pole via shielded cables.
In OVR-15 & 27, option is available for single OR dual voltage sensing per pole.
Figure-6.1: OVR-15 Pole with single voltage sensor
Figure-6.2: OVR-15 Pole with dual voltage sensor
Figure-6.3: OVR-27/38 Pole with single voltage sensor
Figure-6.4: OVR-27 Pole with dual voltage sensor

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5.1.4 Single Coil Magnetic Actuator
The recloser is operated by a single coil magnetic actuator. One actuator gang operates all the three
poles through a common shaft mechanism. The magnetic actuator is bi-stable and does not require any
continuous power to hold it in ON or OFF position.
- Disassembly of the magnetic actuator is not allowed. Lubrication or maintenance is
not required and will void the warranty.
- Should an actuator fail to operate, contact ABB Customer Service Group.
5.1.5 Emergency Manual Trip (k69) Handle
A yellow colored handle is provided on the side of HV cabinet housing for mechanically opening the
recloser during emergency situations. When viewed from front of the cabinet (with rating plate visible),
this handle can be seen on the right hand side of the housing. Recloser can be mechanically opened (not
manual close possible) by pulling this handle from ground level with a standard hook stick (not in ABB’s
scope). Please refer the clause “mechanical opening” under the “operation” section for more information.
5.1.6 Mechanical ON/OFF position Indicator
The HV cabinet includes a mechanical ON/OFF position indicator which can be easily viewed from the
ground level. The general color convention is:
Close
Open
Default Color coding
Red
Green
Option available on request*
Green
Open
* Please check the order specific documents for confirming the color coding
5.1.7 Status Auxiliary limit switches
The status limit switches are mounted inside the HV cabinet housing. They are wired to provide the
recloser status information to the protection & control in LV control cabinet.
Note

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6STANDARD PRODUCTION TESTS
Routine tests are carried out on OVR-15, 27 & 38 with HV units connected with its dedicated LV units . The
standard factory production tests include:
1. Verification of wiring as per approved wiring diagram.
2. Electrical operation:
a.Close and Open in Local/Remote modes
b.Overcurrent response and automatic reclosing through primary injection.
3. Functional checks of manual controls (K69) & associated electrical & mechanical close block
4. Contact resistance measurements on poles.
5. One minute power frequency voltage withstand test on primary circuit of HV unit.
6. Partial discharge test
7. Minimum Trip and Time-Current Test
8. No load mechanical operation test.
The routine test report with a summary of results is shipped as a part of documentation package.
7INSTALLATION
The OVR-15, 27 & 38 recloser can be installed in a substation frame, pole-mounting frame, or can be
mounted into a customer supplied structure. However, it is required that in all of the mounting methods
the recloser be vertical, levelled and securely fastened. Follow your company guidelines and various
codes for setting the height of the recloser, securing the frame to the pole or foundation, and making
connections.
Before shipping from factory, the OVR-15, 27 & 38 recloser HV unit is tested as a system in factory with a
LV control. It is mandatory that during installation, the HV unit and LV control cabinet are properly
matched by serial number mentioned on rating plates provided on each of them.
- All metal mounting frames and structures must be commonly grounded to the
grounding grid at site. For proper operation of the electronic components, it is
mandatory that the total impedance of the grounding grid at site should be less than
one Ohm (1 Ω)
- It is also mandatory to ensure that all the grounding connections to the welded star
grounding pad inside the LV cabinet are always intact and secured.
- Be careful not to bend the cable below a radius of 12 inches to avoid damage to itself.
Note

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Note
TESTS BEFORE INSTALLATION
7.1.1 Vacuum test procedure
It is recommended to conduct one minute power frequency voltage withstand test on each interrupter
to verify that there has been no loss of vacuum during transportation or handling. Experience has
indicated that while a vacuum interrupter with the vacuum seal intact will withstand 40 kV AC (80% of
50kV) for OVR-15, 45 kV AC (80% of 60kV) for OVR-27 and 56 kV AC (80% of 70kV) for OVR-38 across the
open contacts. The same interrupter with leaked vacuum (open to normal atmosphere) will flashover at
the gap at a much lower voltage.
High voltage applied across an open gap in a vacuum can produce X-ray radiation. However, no radiation
is emitted when the recloser is closed since no gap exists. Also, X-ray radiations at one meter is below
the concern level when the recloser is open to the specified contact spacing during testing (within
specified voltages) or in normal service conditions. Danger could exist at voltages above rating plate
specified voltages.
For testing, with recloser in open position, connect all the three upper terminals together with jumpers.
Connect all three lower terminals together with separate jumper and ground them to cabinet housing.
Connect the high voltage to the top terminals.
During testing, it is mandatory that.
- HV & LV cabinets are connected properly by the control cable
- Both HV and LV cabinets are securely grounded.
- LV cabinet is placed at least three meters away from HV cabinet
- Stand clear more than three meters before energizing the high voltage source.
- Do not apply voltage for more than 60 seconds.
If internal flashover occurs, isolate the phases, and test each one independently to identify the defective
interrupter. Any defective pole assembly must be replaced prior to the recloser is installed & placed in
service.
7.1.2 Contact Resistance
Close the recloser with the help of LV unit and connecting cable associated with that. Measure contact
resistance with suitable equipment rated not less than 100 A DC. The value of the contact resistance for
each phase should not exceed 40 micro-ohms. Make sure that the current injection leads of contact
resistance measurement kit are connected across the incoming & outgoing terminals of the pole only.
If the vacuum interrupter / complete pole needs to be replaced, please
contact ABB
MOUNTING
The HV Cabinet is shipped with mounting frame as per agreed type of mounting during ordering stage.
For details, refer the recloser mounting documents supplied with the order bound drawings for details.
Do not use forklift to move recloser as it may damage the mechanical ON/OFF
position indicator, Yellow Handle and associated interlock.
Caution