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2 TD_MRI1-IU_05.04_GB
Contents
1 Introduction and application
2 Features and characteristics
3 Design
3.1 Connections
3.1.1 Analogue input circuits
3.1.2 Output relays
3.1.3 Blocking input
3.1.4
External reset input
3.2 LEDs
4 Working principle
4.1 Analogue circuits
4.2 Digital circuits
4.3 Voltage controlled tripping
characteristic
4.4 Demand imposed on the main current
transformers
5 Operation and setting
5.1 Display
5.2 Setting procedure
5.2.1 Current setting values for overcurrent
relay (I
SN
and I
SL
)
5.2.2 Time current characteristics for phase
overcurrent element (CHAR I>)
5.2.3 Trip delay or time multiplier for phase
overcurrent element (t
I>
)
5.2.4 Reset setting for inverse time tripping
characteristics in the phase current path
5.2.5 Current setting for high set element
(I>>N and I>>L)
5.2.6 Trip delay for high set element (t
I>>
)
5.2.7 Undervoltage set reference value
5.2.8 Nominal frequency
5.2.9
Adjustment of the slave address
5.2.10 Blocking the protection functions and
assignment of the output relays
5.3 Indication of measuring values and
fault data
5.3.1 Indication of measuring values
5.3.2 Indication of fault data
5.4 Reset
6 Relay testing and commissioning
6.1 Power-On
6.2 Testing the output relays and LEDs
6.3 Checking the set values
6.4 Secondary injection test
6.4.1 Test equipment
6.4.2
Example of test circuit
6.4.3 Checking the input circuits and
measured values
6.4.4 Checking the operating and resetting
values of the relay under normal and
low voltage
6.4.5 Checking the relay operating time
6.4.6 Checking the high set element
6.4.7 Checking the external blocking and
reset functions
6.5 Primary injection test
6.6 Maintenance
7 Technical data
7.1 Measuring input circuits
7.2 Common data
7.3 Setting ranges and steps
7.3.1 Definite time overcurrent protection
relay
7.3.2 Inverse time overcurrent protection relay
7.4 Inverse time characteristics
7.5 Output contacts
8 Order
form
Important:
For additional common data of all
MR -relays please
refer to manual " MR - Digital Multifunctional relays".
This technical manual is valid for software version
D08-6.00.