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8
G R I D S H I E L D
—
2 Introduction
2.1 General instructions
Please carefully read these instructions before
proceeding with installation, and refer to them
as a guide throughout the installation and initial
operation process. It is essential to keep these
instructions filed together with other instruction
books, drawings and descriptive data for the
recloser. This manual should always be easily
accessible for future reference during the
equipment's installation, operation and maintenance.
By following these instructions, you will ensure the
proper maintenance of the equipment and extend
its useful life.
2.2 Scope of instructions
The provided instructions are of a general nature
and cover the requirements for installation, setup,
operation and maintenance of all ratings of the ABB
GridShield
vacuum recloser. However, please note that these
instructions do not cover all possible variations
and combinations of equipment and installations.
For specific information regarding installations,
please refer to the following resources:
• Bills of materials: These lists include electrical
devices and equipment.
• Single line drawings: These diagrams illustrate
power connections.
• Elementary and schematic diagrams: These
diagrams provide detailed visual representations.
• Connection diagrams: These diagrams show how
different components are connected.
It's important to understand that these
instructions do not aim to address every possible
question that may arise during the application,
operation and maintenance of the product.
Additionally, as improvements are made to parts
and assemblies, the appearance of some parts
may differ from the illustrations. However, their
functionality will remain equivalent.
®
3 P/ 3 S P R E C L O S E R
3P/3SP medium voltage three-phase
®
2.3 GridShield 3P/3SP recloser introduction
The GridShield vacuum recloser is an advanced
device that operates in three phases. It consists
of three vacuum interrupters, each driven by a
separate magnetic actuator. These components,
along with the voltage and current sensors, are
embedded in a pole cast from a special material
called hydrophobic cycloaliphatic epoxy (HCEP)
polymer. The current-sensing current transformer
(CT) is located in the H2 (horizontal or Y-side)
position. In a standard SVS (single voltage sensing)
unit, the voltage sensor is placed in the H2 bushing.
In a DVS (dual voltage sensing) unit, the voltage
sensors are positioned in both the H1 (vertical or
Z-side) and H2 (horizontal or Y-side) bushings
(see figure 11).
The recloser is equipped with specialized control
functions. It can detect an overload and
automatically open. After a pre-set time delay,
it will close again. If the overload persists, the
recloser will trip and reclose once more. With
the standard GridShield controls (RER620 and
RER615), the recloser can perform up to five
reclosing operations before it locks open.
Alternatively, using the optional Beckwith M-7679
or SEL-651R controls, the recloser allows up to four
reclosing operations before it goes into lockout
mode. To restore normal service, the fault causing
the condition must be eliminated.
To help ensure satisfactory performance of
the recloser, correct installation, adequate
maintenance and proper servicing of the product
are crucial. By carefully studying and following
these instructions, users can maximize the
benefits they obtain from this device.
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