Relay Protection Device for 6–35 kV Distribution Networks.
Reliable and Economic Protection of Power Networks
RZL-05.S
RZL-05.S
A wide range of protection
and automation functions
Combined power supply
including CT circuits unit
Backup trip via CB
current solenoids
Digital oscilloscope
Event log
Integration in
SCADA-system
Environment temperature
-40°C...+60°C
User-defined logics
Assignment
New multifunctional relay protection and automation devices
Download the catalog. Relay Protection and Automation Devices.
Application
- Substations and utilities equipped with medium-voltage switchgears 6-45 kV;
- Redundant protection of medium / high voltage transformers;
- Replacement of electromechanical and microelectronic relays and relay protection and automation devices manufactured using outdated technologies (especially when integrating them into SCADA systems).
Features
- Universal power supply (AC, DC, powered by current circuits);
- Buttons on the front panel for operational control of circuit breaker;
- Free programming of digital inputs, outputs, LEDs;
- Preservation of full performance during prolonged power interruptions;
- Three data transfer interfaces: USB, RS-485, Ehternet (RJ-45) (option);
- Unified software "Monitor-2";
- Integration with existing communication protocols and the possibility of upgrading communication channels in the future;
- Good price-functionality ratio.
Communication and Interfaces
Devices of RZL-05.S series has three built-in communication ports, of which one RS 485 is a traditional serial interface for the Modbus RTU protocol, and the second is a serial port designed for exchanging information based on Modbus TCP network Ethernet. Ethernet TCP network allows fast data transfer between the central computer and devices, it is effective for downloading waveforms and measurement results. The third SPI port can be used to expand the number of inputs and outputs of the device (up to 128), as well as for the possibility of connecting various digital sensors (temperature, pressure, etc.)
Event Recording and Oscilloscope
The RZL-05.S device memory contains 256 event records, namely: turning the device on and off, changing the status of inputs / outputs, starting and operation of all functions, operation of output relays, device reset, remote control signals. You can use USB port or other available serial ports to download event records to a computer. Event records are stored in non-volatile memory, all events have time stamps with an interval of 10 ms.
The device provides a record of waveforms of emergency processes:
- instantaneous values of phase currents IA, ІВ, IС;
- instantaneous values of zero sequence current 3І0;
- instantaneous values of phase (linear) voltages UА, UВ, UС (UАВ, UВС, UСА);
- instantaneous zero sequence voltage 3U0;
- state of discrete inputs and output relays.
Each waveform is linked to the device internal timer with a resolution of 1 ms. The total waveform recording time is set to 30 seconds, the duration of the waveform recording can be configured. The oscilloscope starts by the protection operation, by an external input signal or by automatic control system. All digital and analog information is stored in non-volatile memory. Waveform files are read in Comtrade format.
Тechnical parameters
| Power supply units parameters | |
|---|---|
| Rated supply voltage | 110, 220 V DC/AC |
| Power-on availability time | 0,25 s (Urated = 220 V) 0,2 s (Urated = 110 V) |
| Operating supply interruption | 0,5 s (Urated = 220 V) 0,2 s (Urated = 110 V) |
| Device burden | 5 Wt (Urated = 220 V) 3 Wt (Urated = 110 V) |
| Supply from current transformer circuits (optional) | 2 |
| Current withstand, continuous/1 s | 2,5–10,0/250 А |
| Current input parameters | |
| Rated input current | 5 А |
| Line current inputs number | 3 (2) |
| Measurable current range | 0,2–130,0 А |
| Measurable current circuits thermal withstand, continuous/1s | 15/400 A |
| Thermal withstand in case of power supply from current circuits, continuous/1s | 10/250 A |
| Rated zero-sequence input current 3I0 | 1 A |
| Measurable current range | 0,01-4,00 A |
| Current circuit 3I0 thermal withstand, continuous/1s | 5/100 A |
| Voltage input parameters | |
| Phase voltage | 100 V |
| Number of measured voltages | 4 (UA, UB, UC, 3U0) |
| Measured voltage range | 5–200 V |
| Measurable voltage circuits thermal withstand, continuous/1 s |
150/260 V |
| Binary input parameters | |
| Number of inputs (optoisolated) | 5 (2) |
| Rated AC, DC voltage | 220 V |
| Response voltage level | 132–176 V |
| Dry contact binary input parameters | |
| Number of inputs | 3 |
| Dry contact circuits source voltage | DC 30 V |
| Binary output (relay)parameters | |
| Number of binary outputs | 6 |
| AC voltage trip | 24–400 V |
| DC voltage trip | 24–300 V |
| Maximum AC current | 8 А |
| Maximum DC LR-circuit trip current τ≤20мс | 1/0,3 A |
| Communication | |
| Communication interfaces | USB, RS-485 Ethernet (RJ45) |
| Data Protocols | Modbus RTU Modbus TCP |
| Connection speed via USB, RJ-485 | 9600...115200 bps |
| Other | |
| Device dimensions (WxHxD) | 220х145х100 mm |
| Indicator 2x16 | OLED |
| Operating ambient temperature range | -40...+60 °С |
| Maximum Humidity at 25 °C | 98 % |
| Insulation resistance, more than | 50 MΩ |
| Weight, less then | 4 kg |
Embodiments of a device RZL-05.S
| Code name | Phase voltage measurement inputs | Power supply from current circuits | Bypass current circuits |
|---|---|---|---|
| RZL-05.S-1 | - | - | - |
| RZL-05.S-2 | - | + | - |
| RZL-05.S-3 | - | + | + |
| RZL-05.S-4 | + | - | - |
| RZL-05.S-5 | + | + | - |
| RZL-05.S-6 | + | + | + |
Functions
| Functions | ANSI | RZL-05.S - | |||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||
| Backup power supply functions | |||||||
| Powered by current circuits (phases of current transformer A and C) | • | • | • | • | |||
| Backup trip coils via CB current solenoids | • | • | |||||
| Protection functions | |||||||
| Overcurrent protection (OCP) | 50/51 | • | • | • | • | • | • |
| OCP with voltage blocking | 51V | • | • | • | |||
| OCP blocking by binary input | 50/51 | • | • | • | • | • | |
| Switch on to fault high-speed protection | 50HS | • | • | • | • | • | • |
| Logic Selectivity Busbar protection | 68 | • | • | • | • | • | • |
| Zero-sequence OCP (unidirectional earth-fault protection) | 50N/51N | • | • | • | • | • | • |
| Directional ground-fault protection (directional zero-sequence power protection) | 67N | • | • | • | • | • | • |
| Overvoltage protection | 59 | • | • | • | |||
| Undervoltage protection | 27 | • | • | • | |||
| Zero-sequence overvoltage protection (optional) | 59N | • | • | • | • | • | • |
| Phase conductor break protection (negative sequence or negative to positive sequence ratio current) | 46BC | • | • | • | • | • | • |
| OCP/zero-sequence OCP stage activation by binary signal (current-restrained intertrip) | • | • | • | • | • | • | Automation functions |
| Auto-reclosing | 79 | • | • | • | • | • | • |
| HV Breaker failure back-up | 50BF | • | • | • | • | • | • |
| Monitoring and indication functions | |||||||
| Trip alarm | 30 | • | • | • | • | • | • |
| Internal malfunction alarm | 30 | • | • | • | • | • | • |
| Warning alarm | 30 | • | • | • | • | • | • |
| Service functions | |||||||
| Non-volatile memory event log | • | • | • | • | • | • | |
| Non-volatile memory oscilloscope recorder with 30 s total record duration | • | • | • | • | • | • | |
| Oscilloscope on binary input activation | • | • | • | • | • | • | |
Dimensions
Download the catalog. Relay Protection and Automation Devices.