Eaton Cooper Power Form 6-TS - Remove the Control from Service; Electrical Testing of Triple-Single Reclosers: NOVA-TS

Form 6 triple-single microprocessor-based rack mount recloser control
33INSTALLATION AND OPERATION INSTRUCTIONS MN280084EN July 2018
Remove the control from service
IMPORTANT
Disconnect switches for both AC and DC circuits and
a current transformer shorting-type terminal block are
necessary to isolate the Form 6 recloser control for testing
and servicing.
1. Enable GND TRIP BLOCKED to allow for ground trip to
be disabled when re-energized.
A. Press the CHANGE button on the Operator Panel
to enter the CHANGE mode.
B. Depress the GND TRIP BLOCKED button within
ten seconds after entering the CHANGE mode.
ote:N If the GND TRIP BLOCK button is not depressed
within ten seconds, the function is not activated.
2. Remove DC power from the control using a separate
disconnect switch.
3. Remove control AC sensing voltage from the control
using a separate disconnect switch.
4. Use a screwdriver to disconnect all wiring on terminal
blocks TB10 and TB11 from the control or use a
customer-supplied disconnect switch.
CAUTION
Hazardous voltage. Open CT secondaries can generate
high voltages. Contact with CT pins of the disconnected
cable can cause electric shock and may result in personal
injury. Open recloser contacts and open disconnect
switches before disconnecting control cable. T204.3
5. Short CT secondaries at a separate CT shorting-type
terminal block.
6. Remove any control input and status output wiring from
TB1, TB3, and TB4 (Figure7).
7. Disconnect any serial communications ports and IRIG-B
timing connection (Figure7).
8. Use a screwdriver to disconnect all wiring on
terminal block TB2 from the control (Figure7) in this
specificorder:
A. First disconnect TB2-19 and TB2-20
(voltage inputs).
B. Then disconnect TB2-1 through TB2-17.
ote:N Do not disconnect any of the three recloser
cables from the reclosers or junction box unless
all of the above steps have been completed.
Refer to Service Information MN280045EN
NOVA-TS Recloser Installation and Operation
Instructions.
9. Disconnect the ground from the control.
10. Carefully transport the control to a suitable
service facility.
Electrical testing of triple-single reclosers: NOVA-TS
WARNING
Hazardous voltage. Solidly ground all equipment. Failure
to comply can result in death, severe personal injury,
and equipment damage. T223.2
Each unit in the Type NOVA-TS Triple-Single recloser utilizes
an interface circuit located in its mechanism housing. The
electronic interface circuit controls the opening and closing
signals to the magnetic actuator.
Figure26 shows a test circuit for NOVA-TS reclosers with
the Form 6-TS control.
IMPORTANT
To ensure proper operation, always verify that the three
cables between the junction box and the reclosers are
connected when the control is in single-phase trip, three-
phase lockout mode or three-phase trip, three-phase lockout
(ganged) mode.
Use this circuit to simulate load current and for testing
minimum trip operation and sequencing the mechanism
with the Form 6-TS control for each phase.
600:5
Recloser
BCT ON 600:5 Tap
2
115Vac
Variable
Autotransformer
(10 Amp)
Clamp-On
Ammeter
Triple-Single
Junction Box
Use 2/0 cable or larger
1
2
3
4
5
6
Form 6-TS
Control
Source
Load
Figure26. Suggested test circuit for NOVA-TS
triple-single reclosers with form 6-TS control