DEIF MVR-250 series Medium Voltage Relay

Main features

• Robust design for maritime usage

• Separate processors for HMI and communication

• Power supply selectable, 100-110V DC or 24-48V DC

• Programmable logic

• 6 to 75 Hz patented frequency-tracking algorithm

• Fast and easy-to-use software for setup and commissioning

• 64 samples/cycle

• Password-protected user levels

• Individual voltage and current harmonics up to 31st

• TCP/IP Ethernet

• Ethernet port on the front for easy commissioning and service

• RS-485 Modbus RTU communication

• IEC 60870-5-104/103/101 communication

• IEC 61850 communication, including HSR, PRT, PTP

according to IEEE 1588. and GOOSE (GOOSE not available

in MVR-F201 and MVR-F205)

• System fault (SF) output relay (watchdog)

• On-site replaceable spare part card(s)

• Class 0.55 power and energy measurement (0.25 optional,

where available)

• Marine approval by major class societies: DNV/GL, LR, BV

(other approvals upon request).

General description

The MVR-200 series provides optimal performance for medium-

and high-voltage protection, control, measurement, and

monitoring of applications.

The MVR is designed for use as stand-alone protection and

measuring unit or as a component in larger applications,

connected through IEC 61850 GOOSE messages in three-phase

electrical power networks that require marine approval.

The MVR wide frequency tracking algorithm ensures stable

measurement and protection from 6 to 75 Hz, where variable

frequency is present, such as marine applications and generators

running in island mode.

The MVR measures and calculates values for AC voltage, AC

current, active/reactive power, power factor, frequency, THD and

harmonics (up to 31st). All values can be seen on the display.

A 5 ms scan time ensures that faults are quickly registered.

A 64 samples/cycle fault record function measures data for up to

100 faults for 10 seconds each. This function can be configured

to create records before the error, making it easier to understand

the causes of the error and prevent it from re-occurring.