Masterpact MTZ2/MTZ3 Locking Actions
Locking the Masterpact MTZ2/MTZ3 Pushbuttons
Installing the optional pushbutton locking cover on the Masterpact MTZ2/MTZ3 device prevents access to the closing and opening pushbuttons:
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Together or separately.
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By using a padlock (shackle diameter 5–8 mm).
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By using a wire seal.
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By using screws.
Masterpact MTZ2/MTZ3 VBP Pushbutton Locking Accessory
The optional pushbutton locking accessory is a transparent cover, mounted on the front cover of the device, which covers the closing and opening pushbuttons.
For information on the accessory installation, consult instruction sheet NVE16147 on the Schneider Electric website.
Locking the Masterpact MTZ2/MTZ3 Pushbuttons
Padlocking the Masterpact MTZ2/MTZ3 Device Open
Masterpact MTZ2/MTZ3 VCPO OFF-Position Locking Accessory
The optional off-position locking accessory can be mounted on the front face of the device.
For information on the accessory installation, consult instruction sheet NVE16146, available at the Schneider Electric website.
Locking the Masterpact MTZ2/MTZ3 Device Open with VCPO
Unlocking the Masterpact MTZ2/MTZ3 Device Locked with VCPO
Keylocking the Masterpact MTZ2/MTZ3 Device Open
Optional keylocks can be used:
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To lock one Masterpact MTZ2/MTZ3 in the open position. When locked the device cannot be closed either locally with the closing pushbutton or remotely.
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To interlock several Masterpact MTZ2/MTZ3 devices locked with the same key.
To use keylocks to lock the device in the open position, an optional OFF-position locking accessory is necessary.
The keylocks can be used in addition to padlocks.
Masterpact MTZ2/MTZ3 VSPO OFF-Position Locking Accessory
The OFF-position locking accessory is an optional accessory that can be mounted on the front of the device.
The OFF-position locking accessory can be fitted with either:
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One keylock.
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Two keylocks with identical keys or different keys.
The following types of keylocks can be fitted:
For information on the accessory installation, consult instruction sheet NVE16146, available at the Schneider Electric website.
Locking the Masterpact MTZ2/MTZ3 Device Open with VSPO
For devices equipped with two keylocks, locking with one key is sufficient to lock the device in the open position.
Unlocking the Masterpact MTZ2/MTZ3 Locked Open with VSPO
For devices equipped with two keylocks, locking with one key is sufficient to lock the device in the open position.
Locking the Masterpact Cradle in the Disconnected Position
The cradle can be locked in the disconnected position. When the cradle is locked in the disconnected position, the racking handle cannot be inserted.
The cradle can be locked in the disconnected position:
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By up to three padlocks with shackle diameter 5–8 mm (3/16–5/16 in.).
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By optional keylocks.
Keylocks can be used in addition to padlocks.
Cradle locking by padlock is always possible and does not require any accessory.
Locking a Masterpact MTZ2/MTZ3 Cradle in with VSPO
A cradle locking by keylock accessory can be fitted with either:
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One keylock.
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Two keylocks with identical keys or different keys.
The following types of keylocks can be fitted:
For information on the accessory installation, consult instruction sheet NVE16142, available at the Schneider Electric website.
Locking a Masterpact MTZ2/MTZ3 Cradle with Padlocks
Unlocking a Padlocked Masterpact MTZ2/MTZ3 Cradle
Locking a Masterpact MTZ2/MTZ3 Cradle with Keylocks
For a cradle equipped with two keylocks, locking with one key is sufficient to lock the cradle in the disconnected position.
Unlocking a Keylocked Masterpact MTZ2/MTZ3 Cradle
For a cradle equipped with two keylocks, both keys must be inserted in the keylocks to unlock the cradle.
Locking the Masterpact MTZ2/MTZ3 Cradle in Any Position
The cradle can be locked in any position (connected, test, or disconnected position).
This locking function requires a mechanical adaptation of the cradle, explained in the following procedure.
When the cradle is locked, the racking handle cannot be inserted in the racking handle socket.
The cradle can be locked in any position:
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By up to three padlocks with shackle diameter 5–8 mm (3/16–5/16 in.) as standard.
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By one or two optional keylocks.
Keylocks can be used in addition to padlocks.
Masterpact MTZ2/MTZ3 Cradle Locking with VSPD Keylock Accessory
The cradle locking by keylock accessory and the locking and unlocking procedures are the same as for cradle locking in disconnected position (see Locking the Masterpact Cradle in the Disconnected Position).
Converting the Masterpact MTZ2/MTZ3 Cradle for Keylocking
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HAZARD OF DEVICE FALLING
Failure to follow these instructions will result in death or serious injury.
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NOTICE |
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HAZARD OF EQUIPMENT DAMAGE
The cradle must be securely fastened when installing or
removing the device.
Failure to follow these instructions can result in equipment damage.
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Step |
Action |
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1 |
Make sure that cradle indicator is in the disconnected position |
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2 |
Remove the device from the cradle (see Removing Masterpact MTZ2/MTZ3 Device from the Cradle). |
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3 |
Insert the racking handle into the racking handle socket. |
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4 |
Rotate the latch to the front. The cradle can now be locked in any position. |
Locking the Masterpact MTZ2/MTZ3 Safety Shutters
The shutters automatically block access to the main disconnects when the circuit breaker is in the disconnected, test, or fully withdrawn position.
The shutter lock is used to prevent connection of the circuit breaker or to lock the shutters in the closed position.
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The safety shutters can be locked by a padlock on the front of the cradle .
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The shutter can be locked with one padlock with maximum shackle diameter 5–8 mm (3/16–5/16 in.).
Not available on cradles with ArcBlok technology.