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Protection and Control Devices
for Substations and Industrial Facilities
RZL-05


RZL-05
 

RZL-05 device series is multi-purpose intellectual electronic device (IED) for power system elements protection, automation, control, event logging, fault parameters recording and indication.

RZL-05 devises have flexible programmable logic functions and hardware configuration. RZL-05 provides a great function kit for overhead and cable electrical line networks.

Another RZL-05 purpose is transformer, motor or generator back-up protection.

RZL-05 series includes basic and advanced device configurations to fit best your objectives. Basic configuration relays contain general protection function kit, depending on purpose.

RZL-05 grants maximum reliability due to a number of back-up software and hardware modules solutions.

Devices are integratable to SCADA control network with the RS-485 interface and Modbus RTU data transfer protocol.

The RZL-05 series includes next device modifications:

  • RZL-05М - Simplefied Low-Cost Protection and Control Devices for Substations and Switchgears 1 - 45 kV;
  • RZL-05.А - Advanced Protection and Control Devices for Substations and Switchgears 1 - 45 kV;
  • RZL-05.В - Protection and Control Devices for Substations and Switchgears 1 - 45 kV;
  • RZL-05.F - Outgoing Feeder Protection and Control;
  • RZL-05.ТН - Voltage Transformers Monitoring
  • RZL-05.К1 RPN - Automatic Control of Transformers Under Loading
  • RZL-05.SH1 CS - Central Alarm Devices

RZL-05 series devices have basic, standard and advanced typical configurations of hardware composition and logic features.

RZL-05 features


ANSI Functions
50/51 Overcurrent protection (OCP)
50V/51V Voltage-restrained OCP
  Blocking OCP on external command
67 Directional OCP
46 Negative-sequence current protection
50HS Switch-onto-fault protection
96 Busbar Instantaneous trip lockout
50N/51N Zero-sequence OCP (unidirectional ground-fault protection)
67N Directional ground-fault protection (directional zero-sequence power protection)
67N Zero-sequence overvoltage protection
59 Overvoltage protection
27 Undervoltage protection with a current-permissive instance
47 Negative-sequence overvoltage protection
46BC Phase conductor break protection (on negative-sequence current and negative-to-positive sequence current ratio modes)
  Intertripping on remote protection device signal with current-permissive instance
  Arc-fault protection with phase current and zero-sequence current restrain instance
  Current permissive negative-sequence undervoltage protection
  Auxiliary circuit overvoltage protection
  Voltage transformer primary side ferroresonance protection
  Motor thermal protection
  Voltage and/or auxiliary transformers supervision, based on different voltage channels instantaneous values compare
79 Auto-reclosing
81L Automatic underfrequency load shedding
50BF HV Breaker failure back-up
  Automatic load transfer
  Automatic initial scheme restoration (after load transfer followed by fault HV input restoration)
  Breaker closing circuits failure supervision
38/49T Temperature monitoring via thermal sensor
30 Alarm on protection operation performed
30 Internal failure alarm (watchdog)
74TCS Trip circuits supervision
  Voltage transformer secondary circuits supervision
  Binary signal input-to-output supervision
  Parameter setting groups toggle on binary input activation
  Parallel supervision of two voltage transformers circuits
  Breaker control
  Event logging
  Non-volatile log memory
  600 sec total memory oscillograph
  Parameters recording start on binary input activation

RZL-05 parameters


Parameter Standard configuration Advanced configuration
Rated thermal current (current circuits power supply), А:
continuous / 1 s duration / 60 s duration
10 / 250 / 20 10 / 250 / 20
Measuring zero-sequence current input parameters
Rated 3Іо value, А 1 1
Number of inputs 1 1
Measurable current range (with rated accuracy), А 0,01-4,00 0,01-4,00
Maximum measurable current value, А 20 20
Relative error, % ±5; ±5
Rated thermal current, А:
continuous / 1 s duration / 60 s duration
1,5 / 100 / 10 1,5 / 100 / 10
Measuring voltage input parameters
Rated phase-to-ground voltage, V 100 100
Number of inputs 4 4
Measurable voltage range (with rated accuracy), V 1 - 130 1 - 130
Maximum measurable voltage value, V 150 150
Relative phase-to-ground voltage measurement error, % ±2 ±2
Relative zero-sequence voltage measurement error, % ±3 ±3
Rated thermal (voltage (calculated by induced current), V:
continuous / 1 s duration / 60 s duration
130 / 300 / 252 130 / 300 / 252
Absolute 3Іо to 3Uо angular error, deg ±2 ±2
Temperature sensor input parameters
Measurable temperature range (with rated accuracy), °С 0-100 0-100
Maximum measurable temperature value, °С: 125 125
Relative temperature measurement error, % 2 (0,5% RZL-05.RPN) 2
Binary inputs parameters
Number of inputs 9 17
Rated AC, DC voltage, V 220 220
Response voltage level, V 132 -176 132 -176
Unresponse voltage level, V: 0 – 88 0 – 88
Current consumption , mА:
- energizing instantaneous inrush value
- continuous

20
4

20
4
Response time, ms 40 40
Maximum voltage, V 310 310
Dry contact binary inputs parameters
Number of inputs 3 3
Signal type «dry contact» «dry contact»
Dry contact circuits source voltage, V, DC 24 24
Binary outputs parameters
Number of binary outputs:
- normally open (high current-trip ability)
- normally open (common)
- toggle
13
1
8
4
17
1
13
3
Maximum tripping DC voltage, V 300 300
Maximum tripping AC voltage, V 400 400
Maximum continuous current, А 10 (output К1 - 30А) 10 (output К1 - 30А)
Maximum AC trip current, А 8 (output К1 - 16А) 8 (output К1 - 16А)
Maximum DC trip current in L-R circuits with time constant ≤ 20 ms, А 0,3 (output К1 - 0,6А) 0,3 (output К1 - 0,6А)
Connection
Interface RS-485 RS-485
Protocol MODBUS RTU MODBUS RTU
Connection speed 9600, 19200, 38400, 78600 1200, 9600, 19200, 38400,
78600, 115200