0614IB1702

Masterpact MTZ1 Drawout Device Racking

Masterpact MTZ1 Drawout Status

Masterpact MTZ1 Drawout Handling Conditions

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS or local equivalent.
  • This equipment must only be installed and serviced by qualified electrical personnel.
Failure to follow these instructions will result in death or serious injury.

Connection or disconnection of the drawout device requires insertion of the racking handle. When interlocks, padlocks, or an open door lock are in place, the racking handle cannot be inserted.

Masterpact MTZ1 Drawout Positions

The indicator located on the front of the cradle locally signals the position of the device in the cradle.

Device Position

Position Indicator and Position Contact State

Connector position

Device Status

Connected

  • Disconnecting contact clusters: engaged

  • Control: engaged

  • Can be operated.

  • Ready for service.

Test

  • Disconnecting contact clusters: disengaged

  • Control: engaged

  • Can be operated.

  • Can have operation and control systems tested.

Disconnected

  • Disconnecting contact clusters: disengaged

  • Control: disengaged

  • Can be operated.

  • Can be removed from the cradle.

Withdrawn

  • Disconnecting contact clusters: disengaged

  • Control: disengaged

Removed from the cradle.

Masterpact MTZ1 Drawout Position Contacts

The position of the device in the cradle is indicated remotely by the following position contacts:

  • CE: connected position.

  • CT: test position.

  • CD: disconnected position. The device is in the disconnected position when the minimum isolation distance between the main contacts and the auxiliary contacts is reached.

The state of the position contacts changes according to the device position during the racking-in and racking-out operations, as shown in the diagram below.

Position contact is open

  1. Device in connected position

  2. Separation of the main circuits

  3. Device in test position

  4. Separation of auxiliary circuits

  5. Device in disconnected position

Position contact is closed

Masterpact MTZ1 Drawout Position Contact Without EIFE Ethernet Interface

Without EIFE Ethernet interface, the standard configuration of the position contacts can be added as follows:

  • 2 CD disconnected position contacts

  • 3 CE connected position contacts

  • 1 CT test position contacts

Masterpact MTZ1 Drawout Position Contacts with EIFE Ethernet Interface

With EIFE Ethernet interface, two optional CE connected position contacts can be added.

Masterpact MTZ1 Cradle Management Function

The cradle management function is used to:

  • Record and check the position of the moving part of the drawout device in the cradle.

  • Provide information about preventive maintenance actions.

  • Notify the remote controller about the position of the drawout device.

The cradle management function is performed by:

Masterpact MTZ1 Disconnection

Masterpact MTZ1 Drawout Handling Conditions

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS or local equivalent.
  • This equipment must only be installed and serviced by qualified electrical personnel.
Failure to follow these instructions will result in death or serious injury.

Connection or disconnection of the drawout device requires insertion of the racking handle. When interlocks, padlocks, or an open door lock are in place, the racking handle cannot be inserted.

Racking Out Masterpact MTZ1 Devices from Connected to Test Position

Step

Action

1

Remove the racking handle from its storage space.

2

Press the opening pushbutton to open the device.

3

Hold the opening pushbutton in and insert the racking handle into the racking handle socket.

4

Push in the stop release button.

5

Turn the racking handle counterclockwise.

6

When the test position is reached, the stop release button pops out and the mechanism blocks the racking handle.

Result: The device is in the test position.

Racking Out Masterpact MTZ1 Devices from Test to Disconnected Position

Step

Action

1

Push in the stop release button.

2

Turn the racking handle counterclockwise.

3

When the disconnected position is reached, the stop release button pops out and the mechanism blocks the racking handle.

Result: The device is in the disconnected position.

4

Remove the racking handle from the racking socket.

5

Put the racking handle back into its storage space.

Masterpact MTZ1 Connection

Masterpact MTZ1 Drawout Handling Conditions

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS or local equivalent.
  • This equipment must only be installed and serviced by qualified electrical personnel.
Failure to follow these instructions will result in death or serious injury.

Connection or disconnection of the drawout device requires insertion of the racking handle. When interlocks, padlocks, or an open door lock are in place, the racking handle cannot be inserted.

Racking In Masterpact MTZ1 Devices from Disconnected to Test Position

Step

Action

1

Remove the racking handle from its storage space.

2

Press the opening pushbutton in and insert the racking handle into the racking handle socket.

3

Push the stop release button.

4

Turn the racking handle clockwise.

5

When the test position is reached, the stop release button pops out and the mechanism blocks the racking handle.

Result: The device is in the test position.

Racking In Masterpact MTZ1 Devices from Test to Connected Position

Step

Action

1

Push the stop release button.

2

Turn the racking handle clockwise.

3

When the connected position is reached, the stop release button pops out and the mechanism blocks the racking handle.

Result: The device is in the connected position.

4

Remove the racking handle from the racking socket.

5

Put the racking handle back into its storage space.

Masterpact MTZ1 Removal from Cradle

Masterpact MTZ1 Device Removal

NOTICE
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.

Step

Action

1

Discharge the closing spring. With the device in the disconnected position, press the closing pushbutton (see Masterpact MTZ1 Disconnection). The device will close if the closing spring is charged.

2

Press the opening pushbutton to open the device.

3

Pull out the rails to the maximum by pulling on the drawout grips. The moving part of the drawout device stays in disconnected position in the cradle.

4

Pull out the moving part of the drawout device to the maximum, by rolling it along the rails.

Result: The device is supported on the rails, clear of the cradle and ready to be lifted.

Lifting the Masterpact MTZ1 Device

Both the device and cradle have a carrying grip for lifting. To lift, use an overhead lifting device attached to the carrying grip, following the directions given in this section.

DANGER
HAZARD OF DEVICE FALLING
  • Be sure that lifting equipment has lifting capacity for the device being lifted.
  • Follow manufacturer’s instructions for use of lifting equipment.
  • Wear hard hat, safety shoes, and heavy gloves.
Failure to follow these instructions will result in death or serious injury.

Lift the device from the cradle rails by using the carrying handles located on the sides of the device.

Masterpact MTZ1 Circuit Breaker Weights

Number of Poles Device Weight
3P Drawout Circuit Breaker 31 lbs (14 kg)
Cradle 35 lbs (16 kg)
Fixed Circuit Breaker 31 lbs (14 kg)
4P Drawout Circuit Breaker 40 lbs (18 kg)
Cradle 46 lbs (21 kg)
Fixed Circuit Breaker 40 lbs (18 kg)

Masterpact MTZ1 Installation in the Cradle

Masterpact MTZ1 Drawout Handling Conditions

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462, NOM 029-STPS or local equivalent.
  • This equipment must only be installed and serviced by qualified electrical personnel.
Failure to follow these instructions will result in death or serious injury.

Connection or disconnection of the drawout device requires insertion of the racking handle. When interlocks, padlocks, or an open door lock are in place, the racking handle cannot be inserted.

Rejecting the Masterpact MTZ1 Device

The cradle rejection feature (see Masterpact MTZ1 Cradle Rejection Feature) allows the installation of a drawout device only in a cradle with compatible characteristics.

Installing Masterpact MTZ1 Devices in the Cradle

DANGER
HAZARD OF DEVICE FALLING
  • Be sure that lifting equipment has lifting capacity for the device being lifted.
  • Follow manufacturer’s instructions for use of lifting equipment.
  • Wear hard hat, safety shoes, and heavy gloves.
Failure to follow these instructions will result in death or serious injury.
NOTICE
HAZARD OF EQUIPMENT DAMAGe
  • Cradle must be securely fastened when installing or removing the device.
  • Before mounting the device, make sure that it matches the cradle.
Failure to follow these instructions can result in equipment damage.

Step

Action

1

If the cradle is not installed in a switchboard or panelboard, securely fasten the cradle on a pallet.

2

Inspect the circuit breaker clusters for missing or misaligned clusters. See the bulletin shipped with the circuit breaker for information on checking, installing, and lubricating clusters.

3

Remove the racking handle from its storage space.

4

Check that the cradle indicator is in the disconnected position:

If the cradle indicator is not in the disconnected position, follow the steps on disconnecting the drawout device (see Masterpact MTZ1 Disconnection) .

5

Pull out the drawout grips until the extension rails are fully extended.

6

Install the device on the extension rails by using appropriate lifting equipment.

Check that the four wheels on the sides of device are resting on the rails.

7

Detach the lifting equipment.

8

Check that the device is in the open position.

9

Using both hands, push in the device to the maximum in the cradle. Take care not to push the control unit. The rails stay extended.

10

When the device is fully inserted into the cradle, lift and push in the rails to the maximum.

QR code for this page

Was this helpful?