Phone: +38 (044) 500-61-51 (-52, 53), +38 (063) 313-57-17 - Email: sales@relsis.ua

Transformer Differential Protection
RZL-05.T2, RZL-05.T3

RZL-05.T

RZL-05.T

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A wide range of protection
and automation functions


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Digital oscilloscope
Event log


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Integration in
SCADA-system


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Environment temperature
-40°C...+55°C


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User-defined logics



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Fast-operating arc fault
protection with lens-type
photosensor

Application

Microprocessor devices of RZL-05.T series are intended to perform differential protection of two-winding and three-winding power transformers with 35 - 110 kV HV winding. Devices are to be mounted in relay sections of switchgears and also relay panels and substation control boards.

# Download the catalog. Relay Protection and Automation Devices.

Features

  • Two differential protection zones: differential current cutoff without restraining and sensitive differential current protection restrained in case of external fault out of protection area and from magnetising inrush current.
  • Current circuits performance supervision production blocking in case of loss.
  • Five-stage overcurrent protection including current cutoff with magnetizing current inrush restriction, current overload protection with the definite and independent time-delay. For overcurrent protection stages available an option of voltage controlled start.
  • Logical selectivity busbar protection.
  • Three-stage ground fault protection of HV winding. Zero-sequence fault current may be measured or calculated.
  • Phase loss protection (negative-sequence) current protection.
  • Logics of internal transformers protection performance. Each internal protection command might be configured to trip or to initiate an emergency alarm.
  • Light-sensor arc fault protection.
  • Breaker failure protection.
  • User-defined programmable logic.
  • Solid ambient conditions withstand (-40...+55 °C).
  • Multi-lingual LCD interface: English, Ukrainian, Russian.

RZL-05.T - restraining curve

Restraining curve of differential protection

Technical parameters


Parameters RZL-05.T2 - RZL-05.T3 -
1 5 1 5
Power supply units parameters
Operating voltage range, DC / AC, 50 Hz 90 – 360 V / 80 – 254 V
Power-on availability time 0,3 s
Operating supply interruption 0,5 s
Independent supply channels (auxiliary voltage circuits) 2
Device burden 2x13 Wt
Current input parameters
Rated input current 5 A
Line current inputs number 6 9
Measurable current range 0,3 - 125,0 A
Maximum monitored current value 150 A
Basic relative measurement accuracy ±2 %
Current thermal withstand, continuous / 1 s 10 / 500 A
Zero-sequence current input parameters
Rated zero-sequence input current (3Io) 1 A 5 A 1 A 5 A
Line current inputs number 1
Measurable current range 0,01 - 2 A 0,5 - 125 A 0,01 - 2 A 0,5 - 125 A
Maximum monitored current value 10 A 150 A 10 A 150 A
Current thermal withstand, continuous / 1 s 5 / 100 A 15 / 500 A 5 / 100 A 15 / 500 A
Voltage input parameters
Phase voltage 100 V
Number of inputs 4
Rated voltage range 1 - 150 V
Maximum controlled voltage 200 V
Linear voltages measurement accuracy ±2 %
3Uo voltage measurement accuracy ±3 %
Voltage thermal withstand, continuous /1 s 150 / 300 V
Measurement accuracy of phase angles between current 3Іо and voltage 3Uо ±3 deg
Thermal sensor input parameters
Number of inputs 1
Temperature range 0- 100 °C
Binary input parameters
Number of inputs 9 17
Rated AC, DC voltage 220 V
Response voltage level 132 - 176 V
Response time not less 40 ms
Current consumption at 220 V:
- power-on current
- continuous

20 mA
4 mA
Maximum voltage, continuous 310 V
Dry contact binary input parameters
Number of inputs 13 17
Dry contact circuits source voltage DC 24 V
Binary output parameters
Number of binary outputs 13 17
Max AC voltage trip 400 V
Maximum AC current 5 A (10 A for K1 output)
Max DC voltage trip 300 V
Maximum DC LR-circuit trip current, time constant τ≤20 ms 0,2 A (0,4 A for K1 output)
Arc fault protection sensors parameters
Number of inputs 3
Response threshold 900 – 1700 lux
Communication
PC communication interface USB - 1 pcs
Automated Control System communication interface RS-485 - 2 pcs
Data Protocol MODBUS RTU
Connection speed 9600...115200 bps
Other
Mounting type Flush
Device dimensions (WxHxD) 205x240x195 mm 265x240x195 mm
Weight, less then 6,5 kg 10 kg
LED indicators     total / configurable 20 / 16
Operating ambient temperature range - 40 to + 55 °C
Maximum Humidity at 25 °C 98 %
Insulation resistance, more than 50 MΩ
Insulation overvoltage withstand,
Instantaneous / continuous
2,0 kV , 50 Hz
5,0 kV pulse

Wiring Diagram example

RZL-05.DP-13 - wiring diagram

Wiring diagram of external circuits to the devices RZL-05.T3-5


Dimensions

RZL-05.T - dimensions


# Download the catalog. Relay Protection and Automation Devices.