ABB OVR-15 Instruction, Operation And Maintenance Manual page 16

16 O V R - 1 5 , 2 7 A N D 3 8 O U T D O O R VA C U U M R E C L O S E R L O W VO LTA G E U N I T W I T H S E L -7 5 1
6.5 Table 2: Operating procedure
1. Initial conditions at the time
of shipping
2. Preparation before
powering ON
3. To power ON the LV cabinet
with auxiliary power
4. To connect auxiliary supply
to charging device and ACM
5. To connect batteries
to charging device
6. If a radio modem is provided
or added later on site, follow
these instructions to power
it ON
7. Observations when
ACM power is ON
8. AR Ready indication
on relay LED
9. CLOSE operation
10. OPEN operation
OVR-15, 27 and 38 reclosers are shipped from the factory with the following status:
• Recloser interrupter contacts in OPEN (OFF) condition.
• All MCBs in LV cabinet in OFF position.
• Battery physically disconnected from main circuit.
1. Complete installation of LV and HV units.
2. Install optional equipment, such as surge arrestors, auxiliary control transformer
(PT), etc.
3. Connect and properly route the control cable between the LV and HV units. Check
that all male/female connections are firmly secured on both the HV and LV units.
4. Connect and route all the ground connections.
5. Ensure that the emergency manual trip (K69) handle is reset and BLOCK CLOSE
is released.
6. Connect 12 V batteries physically as instructed.
1. Connect auxiliary power cable to the dedicated terminals inside the LV cabinet.
Check wiring diagram provided in order bound drawings.
2. Switch ON the auxiliary power from the source.
3. Check availability of auxiliary power on terminals in the LV cabinet.
4. Switch ON main MCB (AUX SUPPLY MAINS) on the inner swinging door of the LV cabinet.
5. With the front door of the LV cabinet open, the cubicle Illumination lamp (if provided
and controlled by door limit switch) should glow.
6. The auxiliary power outlet socket is also powered.
• Switch ON the MCB dedicated to the external charger and AC circuits.
• With auxiliary power ON, the thermostatically controlled heaters in the HV and LV
cabinets may also turn ON.
1. Check and firmly connect the 2-pin male/female battery connectors in the battery
circuit. Check schematic diagram supplied with the documents for details.
2. This will connect the two 12 V batteries in series. Confirm that voltage across battery
terminals is approximately 24 V.
3. Switch ON the battery MCB to connect the batteries to the charging device.
If a radio modem is factory supplied with the recloser, it will come already wired to the
radio modem MCB. Switch ON this radio MCB to power it ON. Check and connect the
hardwired connection between relay and radio modem. Otherwise, to connect a separately
procured radio modem on site, follow these steps:
1. Check the schematic diagram provided with the documents to confirm the pins on the
charging device for powering the radio modem. It can support up to 7 W at a DC voltage
between 19 V and 29 V.
2. Complete the physical wiring for the power supply with the addition of 2-pole DC MCB
of suitable rating in the circuit.
3. Hardwire the modem to a suitable port of the SEL-751 relay as per the requirements of
the communication protocol. The modem antenna can be connected outside the LV box
by routing the antenna wire through the LV box's bottom gland plate.
When the AC MCB of the charging device is turned on:
• ACM will conduct internal tests initially with both RED and GREEN LEDs blinking. It may
take about two minutes for the recloser to become ready from each initial energization.
• Successful energization will be indicated by the GREEN LED becoming steady and red
LED continuously OFF. This indicates that the ACM (recloser) is ready for operation.
• The SEL-751 relay (on inner swinging door) is fully powered up when the LCD screen
and LEDs on its HMI are fully lit.
When the ACM completes all internal tests and fully charges the capacitors, the "AR Ready"
LED on the SEL-751 relay turns GREEN, indicating that the recloser is ready for operation.
(Please refer to the approved/as-built wiring diagram for a detailed description of the SEL-
751 LED indications applicable to your unit.)
To close the recloser:
• Confirm the emergency manual trip (K69) handle is reset.
• Confirm the recloser status as OPEN by referring to relay HMI (dedicated LED) and the
ON/OFF position indicator on HV unit.
• Press the CLOSE button on relay HMI to close the recloser.
To open/trip the recloser:
• Confirm the recloser status as CLOSED by referring to relay HMI (dedicated LED) and the
mechanical ON/OFF indicator on HV unit.
• Press the OPEN button on relay HMI to open the recloser.