Masterpact MTZ1 Fixed and Drawout Devices
The diagram is shown with circuits de-energized, all devices open, connected and charged and relays in normal position.
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Power* |
Control Unit |
Indication Contacts |
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NOTE: It is possible to add a second MX/MX diag&com or a MN/MN diag
voltage release. The second MX diag&com voltage release can only
be installed after the delivery of the circuit breaker. This is an
after-sales adaptation.
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Remote Operation* |
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NOTE: Maximum length of the two wires
between A2–A3,/C20C3/C12/C13: 5 m (16 ft.).
For the maximum length of the wiring between the AC/DC power supply and the voltage release terminals A1–A3/C1–C3/C11–C13/D1–D2: see Shunt Close (XF), Shunt Trip (MX), and Undervoltage Release (MN) with Basic Coils. |
Terminal Block Marking
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Indication Contacts Terminal Bock |
Control Unit Terminal Block |
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OF4 / OF3 / OF2 / OF1 : Open/closed indication contacts OF |
Com : |
ULP Communication |
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Cradle Contacts Terminal Block |
UC1 : |
Z1-Z4 Zone Selective Interlocking |
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CD2 / CD1: |
Disconnected position contacts |
UC2 : |
T1, T2 = Neutral External Sensors |
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CE3 /CE2 / CE1: |
Connected position contacts |
UC3 : |
Voltage Connector (must be connected to the neutral with a 3P circuit breaker) |
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CT1: |
Test position contacts |
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UC4 : |
External Voltage Connector (PTE option) |
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Remote Operation Terminal Block |
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SDE2: |
Overcurrent Trip Indication Contact |
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SDE1: |
Overcurrent Trip Indication Contact (supplied as standard) |
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MN /MN diag: |
Undervoltage Release Standard or Diagnostic |
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MX/MX diag&com: |
Shunt Trip Standard or Diagnostic & Communicating |
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2nd MX/MX diag&com: |
Shunt Trip Standard or Diagnostic |
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XF/XF diag&com: |
Shunt Close Standard or Diagnostic & Communicating |
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PF: |
Ready-to-Close Contact |
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MCH: |
Spring Charging Motor |
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NOTE: When communicating MX diag&com or XF diag&com accessories
are used, the third wire (C3,A3, C13) must be connected even if the
communication module is not installed.
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