TeSys GV5 / GV6 devices offer positive contact indication and are suitable for isolation in accordance with IEC/EN 60947-1 and 2 standards. The O (OFF) position of the actuator is sufficient to isolate the device concerned.
The following marking on the rating plate label indicates that the device is capable of isolation:
To confirm this capability, IEC/EN 60947-1 and 2 standards require specific shock withstand tests.
TeSys GV5 / GV6 devices can be locked in the O (OFF) position to allow work to be carried out with the power off in accordance with installation rules. The device can only be locked in the open position if the device is in the O (OFF) position.
NOTE: Locking a TeSys GV5 / GV6 device in the open position is sufficient to isolate the device.
Maintenance and Servicing Work on Installation
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HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH |
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oApply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E or CSA Z462 or local equivalent. oThis equipment must only be installed and serviced by qualified electrical personnel. oTurn off all power supplying this equipment before working on or inside equipment. oAlways use a properly rated voltage sensing device to confirm that power is off. oReplace all devices, doors, and covers before turning on power to this equipment. oRepair the installation immediately if an insulation fault occurs during operation. |
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Failure to follow these instructions will result in death or serious injury. |
Turn off all power supplying the equipment before working on or inside equipment. For a partial powering down of the installation, the installation and safety rules require clearly labeling and isolating the feed being worked on.
Maintenance Work Following a Trip on Electrical Fault
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HAZARD OF CLOSING ON ELECTRICAL FAULT |
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Do not close the device again without first inspecting and, if necessary, repairing the downstream electrical equipment. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
The following table describes the procedure to be followed after a trip on electrical fault:
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Step |
Action |
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1 |
Isolate the feed before inspecting the downstream electrical equipment. |
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2 |
Look for the cause of the detected fault. |
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3 |
Inspect and, if necessary, repair the downstream equipment. |
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4 |
Inspect the equipment in the event of a short-circuit trip. |
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5 |
Close the device again. |
NOTE: The fact that a protection has tripped does not remedy the cause of the fault detected on the downstream electrical equipment.
Checking settings does not require any particular precautions. The checks must be carried out by a qualified person.
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HAZARD OF NUISANCE TRIPPING |
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Protection tests must be done by qualified electrical personnel. |
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Failure to follow these instructions can result in injury or equipment damage. |
When testing device trip mechanisms, precautions must be taken:
oTo avoid disrupting operations.
oTo avoid inappropriate actions or tripping of alarms.
For example, tripping the device with the push-to-trip button can lead to inappropriate fault indications or corrective actions (such as switching to a replacement power source).
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HAZARD OF NUISANCE TRIPPING OR FAILURE TO TRIP |
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Protection setting adjustments must be done by qualified electrical personnel. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
Modifying trip unit settings requires a thorough knowledge of the installation and safety rules.
