OMICRON electronics

The CMC 356 is designed to optimally cover the modern requirements for commissioning and maintaining substations and protection devices. It opens up new possibilities especially for applications with 5 A CTs and for tests with very high power demand. Its specifications cover applications in generation (including distributed generation), transmission, distribution, industry and railways - in high, medium and low voltage levels.

The special feature of the CMC 356 are the powerful current sources with great dynamic range. Commissioning engineers will appreciate the possibility to perform wiring and plausibility checks of the current transformers, by primary injection of high currents from the test set. Three-phase testing of high-burden electromechanical relays and the latest IEC 61850 technology in one device is the answer to the wide variety of challenges in today's protection engineering.

ELT-1 (ELT = “EnerLyzer and Transducer” hardware)

This option turns:

• the 10 binary inputs into multifunctional analog AC and DC measuring inputs. In connection with the EnerLyzerTM-SW-license this function allows to use the CMC 356 as a 10 channel current and voltage transient recorder, measurement device for amplitude, phase, frequency, power (S, P, Q), harmonics, trend recorder etc.
• adds two DC measuring inputs (0 ... 10 V / 0 ... 20 mA) to the CMC 356 test set. The DC measuring inputs can be used to test transducers.

LLO-2

This option adds additional 6 low level outputs to the test set. The total amount of generators that can be controlled by the test set is extended from 16 to 22. The low level outputs can be used to directly test relays with low level inputs or can be used to control additional external amplifiers like CMS 156 or CMA 156.

The low level outputs can simulate signals from non conventional CTs and VTs with low level interfaces. Unique is that Rogowski-coil signals can be simulated not only steady state but also for transients.