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O P E R AT I O N A L C H E C K S P R I O R TO I N S TA L L AT I O N
RER620 and RER615 on standard
ABB control cabinet:
To check the open status of RER620 and RER615,
look for the green LED next to the CLOSE
pushbutton. If the relay is set to single-phase
tripping, a menu will appear on the LCD screen
with options for each phase. You can control the
duration of the opening command through relay
settings. In case of a malfunction, the OPEN and
CLOSE LEDs on RER620 and RER615 will alternate
between blinking red and green. If both LEDs are
off, it means the recloser is in a single-phase mode,
where some phases are open and others are closed.
For IEC applications, the open/close status
colors are reversed.
7.3 Programmable pushbuttons
The GridShield
standard control cabinet provides
®
various options, including RER620, RER615 and
Beckwith M-7679. It works in conjunction with an
actuator control module (ACM) to facilitate open/
close operations on the recloser unit. The cabinet
includes essential features, such as reclosing,
hot line tagging, ground disabling and additional
spare pushbuttons for customization.
The GridShield 24-pin control cabinet with RER620
includes a front panel with control pushbuttons
for various standard recloser functions. These
functions activate an adjacent LED to provide
indication. Below the standard functions are pre-
programmed pushbuttons PROG1 and PROG2. The
functions assigned to these buttons are as follows:
• PROG 1: Battery test (typical) — This function
is applicable when batteries are present in the
control cabinet and the RER620 includes the UPS
module. If the battery test fails, a "Battery Failed"
message will appear. Other assignable functions
include enabling/disabling sensitive earth fault
(SEF) through the RER620 controller or user-
specific logic-based functions.
• PROG 2: No setting (typical) — Assignable
functions include enabling/disabling single-
phase tripping functionality, enabling switch
mode (which allows the recloser to operate as
a simple switch without protection capabilities)
or user-specific logic-based functions.
For detailed information on pushbutton functions
for the SEL-651R, please refer to the SEL-651R
instruction manual.
7.4 Vacuum test procedure
To ensure that the vacuum seal of each interrupter
has not been compromised during transportation
or handling, it is recommended to conduct a
dielectric (hi-pot) test. Experience has shown that
a vacuum interrupter with an intact vacuum seal
can withstand 37.5 kV AC when the contacts are
open. However, the same interrupter, when
exposed to normal atmosphere, will experience
a flashover at a significantly lower voltage.
Radiation warning: It is important to note that
applying high voltage across an open gap in a
vacuum can generate X-ray radiation. However,
no radiation is emitted when the recloser is closed
because there is no gap. Additionally, when the
recloser is open within the specified contact
spacing and tested with the specified voltages, the
X-ray radiation at a distance of one meter is below
the level of concern. However, there may be a danger
of radiation exposure at voltages above or contact
spacing below those specified on the nameplate.
High voltage applied across an open gap
in a vacuum can produce X-ray radiation.
Following is a general guideline for conducting
vacuum integrity testing on the recloser poles:
1.
With the recloser in the open position, connect
the three top terminals together and connect
the three lateral terminals. Ground both the
lateral terminals and the housing. Apply the
high voltage to the top terminals.
2.
Ensure that you stand at a safe distance
of more than one meter away before energizing
the high voltage source.
3.
Do not exceed 37.5 kV AC for any recloser
voltage class. The applied voltage should not
be sustained for more than 60 seconds.
Do not use DC voltage for hi-pot testing.
Applying DC voltage for hi-pot testing is more
destructive and, therefore, is not recommended.
4. If an internal flashover occurs, isolate the phases
and independently test each one to identify the
defective interrupter. Any pole assembly found
to be defective must be replaced before putting
the recloser into service.
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