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CMC 850 User Manual
3 Designated Use
CMC 850 is a test set designated to evaluate, test and commission IEDs (Intelligent Electronic
Devices) in laboratories or substations that utilize GOOSE and Sampled Values according to
IEC 61850.
Any other use of CMC 850 is considered improper and may result in damage to property or persons.
4 Functionality
CMC 850 is part of OMICRON Test Universe system which, in addition to the physical test set,
consists of a test software for a computer with a Windows
operating system, and, if applicable,
external voltage and/or current amplifiers
1
, PTP, IRIG-B or GPS
1
time synchronization units or other
accessories.
4.1 Interfaces to the Test Environment
To interface with the test environment, CMC 850 provides two different functionalities.
The main focus is put onto IEC 61850 by employing Ethernet communication.
Additionally, CMC 850 provides low level outputs to either directly send low level signals to the device
under test, or to control external amplifiers.
For detailed information → “Connections and Interfaces” on page 10.
4.2 Operating CMC 850 with a controlling test software
Test Universe
As long as the interaction with devices under test utilizes GOOSE and Sampled Values, the CMC 850
test set supports all test modules of the Test Universe software. Test plans utilizing GOOSE and
Sampled Values, initially made for the test sets CMC 256plus or CMC 356, can also be used with
CMC 850.
An example Control Center (OCC) document that illustrates how to configure the Sampled Values and
GOOSE features for CMC 850 is provided in the Test Library that is installed with the OMICRON
Test Universe. The OCC document’s name is CMC 850 Example.occ, and it is stored at
...OTU installation path\Test Library\Samples\General Examples.
RelaySimTest
The CMC 850 test set can also be operated by the RelaySimTest software. For this, we strongls
recommend a NET-2 interface board to be installed in the test set (→ 5.2.1 "ETH1 and ETH2 Ports").
With a NET-2 board, a CMC 850 test set can work with up to 4 Sampled Values streams and GOOSEs
simultaneously via both ETH ports.
1. External voltage/current amplifiers and the CMGPS Synchronization Unit are not part of the standard scope of delivery. The CMGPS
Synchronization Unit is a meanwhile discontinued product. For questions about its successor CMGPS 588 contact the OMICRON
Technical Support or visit our website.
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