Back to top
Send SMS Send Inquiry

Siprotec 6MD66 Relay, Siemens Motor Protection Relay

Siprotec 6MD66 Relay, Siemens Motor Protection Relay
Siprotec 6MD66 Relay, Siemens Motor Protection Relay
Send Inquiry
Product Code : SIP3
Brand Name : SIEMENS
Price And Quantity
  • Minimum Order Quantity
  • 1 Piece Piece
Product Description

Siprotec 6MD66 Relay, Siemens Motor Protection Relay:The 6MD66 high-voltage bay control unit is the control unit for high voltage bays from the SIPROTEC 4 relay series. Because of its integrated functions, it is an optimum, low-cost solution for high-voltage switch bays. The 6MD66 high-voltage bay controller unit also has the same design (look and feel) as the other protection and combined units of the SIPROTEC 4 relay series. Configuration is performed in a standardised way with the easy-to-use DIGSI 4 configuration tool.

For operation, a large graphic display with a keyboard is available. The important operating actions are performed in a simple and intuitive way, e.g. alarm list display or switch gear control. The operator panel can be mounted separately from the unit, if required. Thus, flexibility with regard to the mounting position of the unit is ensured. Integrated key-operated switches control the switching authority and authorisation for switching without interlocking. High-accuracy measurement (± 0.5 %) for voltage, current and calculated values P and Q are another feature of the unit.


  • Integrated synchro-check for synchronized closing of the circuit-breaker
  • Breaker-related protection functions (Breaker Failure 50BF, Auto-reclosure 79)
  • Automation can be configured easily by graphic means with CFC
  • Flexible, powerful measured-value processing
  • Connection for 4 voltage transformers, 3 current transformers, two 20 mA transducers
  • Volume of signals for high voltage
  • Up to 14 1-pole circuit-breakers can be operated
  • Up to 11 2-pole switching devices can be operated
  • Up to 65 indication inputs, up to 45 command relays
  • Can be supplied with 3 volumes of signals as 6MD662 (35 indications, 25 commands), 6MD663 (50 indications, 35 commands) or 6MD664 (65 indications, 45 commands); number of measured values is the same
  • Switchgear interlocking
  • Inter-relay communication with other devices of the 6MD66 series, even without a master station interface with higher level control and protection
  • Suitable for redundant master station
  • Display of operational measured values V, I, P, Q, S, f, cos (power factor) (single and three-phase measurement)
  • Limit values for measured values
  • Can be supplied in a standard housing for cubicle mounting or with a separate display for free location of the operator elements
  • 4 freely assignable function keys to speed up frequently recurring operator actions

Communication interfaces

  • IEC 61850 Ethernet
  • IEC 60870-5-103 protocol
  • Service interface forDIGSI 4 (modem)
  • Front interface forDIGSI 4
  • Time synchronization via IRIGB/DCF77
Trade Information
  • FOB Port
  • Mumbai
  • Payment Terms
  • Letter of Credit (L/C), Cheque, Cash in Advance (CID), Cash Advance (CA), Cash on Delivery (COD), Cash Against Delivery (CAD)
  • Delivery Time
  • 6-8 Week
  • Main Export Market(s)
  • Africa, Middle East, Asia
  • Main Domestic Market
  • All India


Office No.-9, Plot 53/54, Sector-34, Space Heights, Near Tawa Hotel, Kamothe, Navi Mumbai - 410209, Maharashtra, India
Mr Piyush Lalchand Rathi (Partner)
Mobile :+919819614841, +919769207841
Mr. Dnyanesh Gawande (Partner)
Mobile :+919833686249