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Contactor Monitoring Device CMD

Contactor Monitoring Device CMD. Monitoring the main contacts of a contactor. Agenda. Short overview saftey applications Features of the CMD How works a CMD? Approvals Combinations with Moeller switchgear. Risk assessment with EN 954-1 for saftey related circuits.

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Contactor Monitoring Device CMD

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  1. Contactor Monitoring Device CMD

  2. Monitoring the main contacts of a contactor Moeller GmbH MD-PMM / Nitschky

  3. Agenda • Short overview saftey applications • Features of the CMD • How works a CMD? • Approvals • Combinations with Moeller switchgear Moeller GmbH MD-PMM / Nitschky

  4. Risk assessment with EN 954-1 for saftey related circuits S – Severity of injury S1 – slight injury S2 – Serious irreversible injury P – Possibility of avoiding hazards P1 - possible P2 – Scarcely possible F- Frequency and time of exposure to the hazard F1 –Rarely to often and/or short duration F2 – Frequent to continuous and/or a long duration Moeller GmbH MD-PMM / Nitschky

  5. Saftey category according to EN 954-1 • Saftey category B,1,2: • at a failure the saftey function could be lost • Saftey category 3,4: • at the first failure the saftey function has to work again Moeller GmbH MD-PMM / Nitschky

  6. Application: category 3 Two contactors serial at the main circuit Moeller GmbH MD-PMM / Nitschky

  7. Undervoltage release Start / Stop NC - Mirror Contact Emergency stop M NO - Auxiliary Contact Contactor Monitoring Device CMD The CMD monitors the main contacts of a contactor via a mirror contact (N/C). During a fault (welded main contacts) the upstream circuit-breaker will be tripped by undervoltage release. Additionally, the internal relay contacts are monitored via an auxiliary contact (N/O) of the contactor. Moeller GmbH MD-PMM / Nitschky

  8. Today Tomorrow M M Features • The CMD reduce the cost for • the second contactor • The time to make the main • wiring is reduced Moeller GmbH MD-PMM / Nitschky

  9. Operation mode of the CMD Saftey contact Main contactor Current status of the contactor Target status of the contactor Compare the control voltage of the contactor with the condition of the main contacts Moeller GmbH MD-PMM / Nitschky

  10. Signalisation and Test Signalisation by LED 1 Contr: Signalisation of the control voltage  Target status of the contactor 2 UVR: Supply of the undervoltage release Test The undervoltage release has to be tested once a year without load Moeller GmbH MD-PMM / Nitschky

  11. Approvals Declaration of EC conformity EC Type-Examination-Certificate UL and CSA approval Ship approvals Moeller GmbH MD-PMM / Nitschky

  12. Combination with contactors AC operated (220-240V50/60Hz): DILM7 to DILM1600, DILH1400 to DILH2000 DC operated (24VDC): DILM7 to DILM500 1 NC contact as mirror contact to IEC/EN60947-4-1 annex F is needed 1 NO contact as interlocked opposing contact to IEC/EN60947-5-1 annex L is needed Moeller GmbH MD-PMM / Nitschky

  13. Combinations with Circuit breakers and switch disconnector Circuit breaker: PKZ2, NZM1 to NZM4 Switch disconnector and molded case switches: N1 to N4, NS1 to NS4 Undervoltage release: 18VDC U-PKZ2(18VDC), NZM1-XUVL NZM2/3-XU, NZM4-XUV Moeller GmbH MD-PMM / Nitschky

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