Introduction; Environmental Protection Program; X-Ray Emission Standards - ABB OVR-15 Instruction, Operation And Maintenance Manual

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1 Introduction

This manual contains the information needed
to install the high voltage (HV) unit of the OVR-15,
27 and 38 auto reclosers and put them into service.
For correct use of the product, please read this
manual carefully along with the instruction,
operation and maintenance manual for the low
voltage (LV) unit.
OVR-15, 27 and 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 provided in this manual may not
contain instructions for special configurations.
In addition to 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
to standardized configurations.
Only use original spare parts for maintenance
operations. For more information, please refer
to the recommended spare parts list included
in this manual.
All installation, commissioning, operation and
maintenance operations must be carried out
by skilled personnel with in-depth knowledge
of the apparatus.

1.1. Environmental protection program

The OVR-15, 27 and 38 reclosers are manufactured
in accordance with ISO 14000 standards (guidelines
for environmental management).
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.

1.2. X-ray emission standards

One of the physical properties of vacuum is the
possibility of X-ray emission when the interrupter
contacts are open and subjected to high voltage.
Specific tests performed show that local emission
at a distance of 10 cm from the interrupter or pole
surface does not exceed 1 mSv/h. It follows that:
• At the rated service voltage, use of vacuum
interrupters 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 is outside the guaranteed operating
limits for the unit and may cause permanent
damage to the unit.
• 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.