8
OPERATING INSTRUCTIONS
MN280067EN July 2017
Type MET electronic recloser control tester operating instructions
To check the reclosing time, check that the control and
tester settings are as specified under INITIAL CONDITIONS
and proceed as follows:
1. Set the control switch to GROUND TRIP BLOCK to
disable the ground trip function while checking the
reclose timing.
2. Energize the tester by setting the ON/OFF Power
switch S1 to ON. The green Recloser Simulator-Open
lamp will light.
3. Set the Ammeter Range switch S4 to the appropriate
range for the trip current to be used.
4. While holding the Fault Current switch S2 in CALIBRATE,
advance the Fault Current Adjust control TR1 to
approximately 125—150% of the minimum-trip value.
5. Move the Manual Control switch to CLOSE and release.
The simulator will close in approximately 3/4 second;
green OPEN light off, red CLOSED light on.
6. Set Time Selector switch S3 to CONTROL RECLOSE/
RESET. Place Display Mode switch, S11, to UPDATE
and the Auto Reset switch, S12, to ON; reset the timer.
7. Set the Fault Current switch S2 to TEST and record the
reclosing intervals.
otee:
N
If the recloser is set for more than one fast
operation, the reclosing time may be difficult to read,
especially if the control is programmed with fast
reclosing times. For easier recording of the reclosing
intervals, set the control for 0 or 1 fast operation.
8. Return the control and tester settings to the INITIAL
CONDITIONS specified at the beginning of the
CONTROL TESTS.
Reset time test
Reset time of standard Form 2 and Form 3 family controls
with serial numbers below 26000 is measured from the
first trip operation. However, if the control is equipped with
the Reset-From-Successful-Reclose accessory, reset timing
starts after any reclose where the current flowing (if any) is
below minimum trip.
Reset time of a standard Form 3A control (serial number
26000 or higher) and Form 4 family controls is measured
from successful reclosing, in the same manner as the
accessory function described above.
Different test procedures are required for checking the reset
time of electronic controls equipped with or without the
Reset- From-Successful-Reclose feature.
Controls which time from first trip
To check the reset time of a control which times reset
from the first trip; check that the control and tester settings
are as specified under INITIAL CONDITIONS and proceed
as follows:
1. Remove the first Reclosing Interval Delay plug from
the control panel and program the control for all
delayed operations.
2. Energize the tester by setting the ON/OFF Power
switch S1 to ON. The green Recloser Simulator-Open
lamp will light.
3. Set the Ammeter Range Switch S4 to the appropriate
range for the trip current to be used.
4. While holding the Fault Current switch S2 in
CALIBRATE, advance the Fault Current Adjust control
TR1 to approximately 125—150% of the
minimum-trip value.
5. Move the Manual Control switch to CLOSE and release.
The simulator will close in approximately 3/4 second;
green OPEN light off, red CLOSED light on.
6. Set the Time Selector switch S3 to CONTROL
RECLOSE/RESET and reset the timer.
7. Place the Fault Current switch S2 to TEST.
8. When the control has tripped, place the Fault Current
switch S2 to OFF. The clock will start timing and when
the sequence relay steps around to the first operation,
the clock will stop and record the timing of the Reset
Delay plug.
otee:
N
The control reset delay cannot be checked by placing
the reset plug into the first Reclosing Interval socket.
Proper control timing cannot be obtained under
these conditions.
9. Replace the Reclosing Interval Delay plug in its socket
and return the control and tester settings to the
INITIAL CONDITIONS specified at the beginning of the
CONTROL TESTS.
Controls which time from successful reclose
Controls equipped with the Reset-From-Successful-Reclose
feature; check that the control and tester settings are as
specified under INITIAL CONDITIONS and proceed as follows:
1. Program the electronic control for one fast and three
delayed operations. The first Reclosing Interval Delay
time must be programmed to have a minimum setting
of at least two seconds.
2. Set the control switch to GROUND TRIP BLOCK to
disable the ground trip function while checking the
reset time.
3. Energize the tester by setting the ON/OFF Power
switch S1 to ON. The green Recloser Simulator-Open
lamp will light.
4. Set the Time Selector switch S3 to CONTROL
RESPONSE. Place Display Mode switch, S11, to
UPDATE and the Auto Reset switch, S12, to ON; reset
the timer.
5. Form 4 family controls only; turn the display on and
enter CODE 38. Code 38 displays the sequence state
of the control, “0” being home.
6. Set the Ammeter Range switch S4 to the appropriate
range for the trip current to be used.
