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 Protect
Transformers and Other Important Power System Apparatus
The M-3310, M-3311, and M-3311A relays provide you with the ability to meet or exceed ANSI/IEEE C37.91 standards with enhanced security. They provide unit and back-up protection for two- or three-terminal transformers, power plants, certain bus arrangements and other three-terminal applications
Your Benefits: Reduce project and ownership costs— Enhance security and operational use— Provide Secure Unit Protection! The M-3310, M-3311, and the NEW M-3311A Transformer Differential Relays meet the challenges of power plant, transmission and distribution differential applications. The primary objectives of the relays are to provide secure protection, economy and integration of functions. They use element designs that enhance security against false tripping—helping maintain the integrity of your system. Protection and More – The M-3310 and M-3311 provide protection against internal unit phase and ground short circuits, abnormal operating conditions, abnormal system conditions, uncleared system faults and breaker failure. These Integrated Protection Systems (IPS®) expand the efficiency of your operations by providing extended functions such as metering, monitoring, event logging, waveform capture (digital oscillography), and local/remote serial communications. Scalable Application – Based on the number of windings, the M-3310 and M-3311 allow you to select the optimum balance of protection while keeping cost to a minimum. The M-3310 is applicable for two-winding transformers, the M-3311 is applicable for two- or three-winding transformers. Meeting Utility and Industrial Standards – The M-3310 and M-3311 meet pertinent ANSI, IEC, UL and CSA standards. This is helpful toward standardization for any utility or industrial application. Beckwith Electric is an ISO 9001 certified company. Communications Ability – The M-3310 employs MODBUS RTU. The M-3311 employs MODBUS RTU andDNP 3.0 for integration into power plant control systems and utility SCADA. Ease-of-Use – The Integrated Protection Systems software (IPScom®) provides easy configuration, as well as setting and viewing of logs and data from the relay. All interactions are broken down into small, logical steps. The software can be used to print all configurations and settings to automate the recording process of each relay’s application. Application Flexibility – Programmable I/O allows the elements to be linked to various output contacts, and to be blocked by control (contact sensing) inputs. This flexibility allows the M-3310 and M-3311 to meet various trip logics as mandated by each application. All elements can be disabled or enabled in order to custom match the exact protection requirements of a given project. The suite of elements can be adapted to meet different protection requirements due to winding types, CT arrangements and grounding. In addition, many applications may be implemented, such as:
Testing, Commissioning, and Event Investigation Tools – The M-3310 and M-3311 metering functions include sequence components, differential and restraining quantities, and vector diagram displays of the inputs. With these, it is easy and fast to verify proper relay setting and proper wiring of complete protection systems—from the instrument transformers to the relay, and everything in between! Improper phasing and polarity reversals are easily seen as high negative-sequence quantities. IPSplot®, our software program for waveform capture analysis, is available for a small extra cost, and provides comprehensive information for detailed event investigations. They also have IRIG-B inputs for coordinated time stamping with other devices. |
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