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Protection and Control Devices
for Substations and Switchgears 1 - 45 kV
RZL-05.F

Application

New modified electronic microprocessor devices series RZL-05 are used for protection, automation, control and monitoring of power distribution network elements. Devices are suitable for 1-45 kV switchgears and depending on certain device type fit the best for incoming feeder bays (RZL-05.Bx B), busbar section coupler bays (RZL-05.Bx BS) and outgoing feeder (RZL-05.Bx F).

Devices can be installed in relay cubicles of switchgear bays. Devices can be powered with DC operating voltage or AC voltage auxiliaries as well.

Download the catalog. Relay Protection and Automation Devices.

Features

Protection, automation and control of an intended network elements;
Operating parameters settings via built-in HMI and PC software tool: functions activation/deactivation, protection stages values and time delay for each stage etc.;
Three photosensor inputs of arc-fault protection;
Each photosensor input independent configuration;
Fault recorder and event log;
Total fault record duration over 600 s;
A solid number of inputs, outputs and indicating LEDs;
Flexible configuration settings;
Non-volatile storage of setting, events, fault recordings;
Data transfer including current parameter and function settings, apparatus state, events, measurements;;
Remote control functions;
Wire connection terminals with end-position locking plug;
Unified steel casing with the same size for all types;
Front side USB interface;;
Two RS-485 interfaces of MODBUS data transfer protocol;
Real-time self-supervision;
Self-blocking on internal failure to prevent false operations;
Two mutually redundant power supply units;
Optional current circuits low-burden redundant power supply;
AC/DC power supply source;
Binary inputs optocoupler isolations;
Supply inputs and all signal circuits are galvanically isolated;
Solid overvoltage withstand;
Solid ambient conditions withstand;

Technical parameters

Power supply units parameters
Operating voltage range, DC or AC	90 - 254 V
Power-on availability time	0,19 s
Operating supply interruption	0,5 s
Independent supply channels (auxiliary voltage circuits)	2
Device burden	8 Wt
Supply from current transformer circuits (optional)	2
Continuous current withstand	2,5 - 20,0 A
Current input parameters
Rated input current	5A
Line current inputs number	3
Measurable current range	0,3 - 125,0 A
Current thermal withstand, 1 s	10 (500) A
Rated zero-sequence input current (3Io)	1 A
Measurable current range	0,01 - 4,00 A
Voltage input parameters
Phase voltage	100 V
Number of inputs	3
Rated voltage range	1 - 150 V
Maximum continuous voltage	130 V
Thermal sensor input parameters
Number of inputs	1
Temperature range	0 - 125 °C
Communication
USB interface	1
RS485 interface	2
Data protocol	Modbus RTU
Connection speed	9600, 19200, 38400 kbps
Binary input parameters
Numbers of inputs	12
Rated AC, DC voltage	230 V
Response voltage level	132 - 176 V
Response time	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	3
Dry contact circuits source voltage, DC	24 V
Binary output parameters
Number of binary outputs	12
Maximum DC voltage trip	300 V
Maximum AC voltage trip	400 V
Maximum AC current	8 A (16 A for K1 output)
Maximum DC LR-circuit trip current, time constant τ ≤ 20 ms	0,3 A (0,6 A for K1 output)
Other
Mounting type	Flush
Device dimensions (WxHxD)	205x240x190 mm
LED indicators total / configurable	20/6
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	5 / 2 kV
Weight, less then	6 kg

Function

Function	ANSI	RZL-05.Bx B				RZL-05.Bx BS				RZL-05.Bx F
Protection		1	2	3	4	1	2	3	4	1	2	3	4
Overcurrent (OCP)	50/51	•	•	•	•	•	•	•	•	•	•	•	•
Voltage-restrained OCP	50V/51V	•	•	•	•	•	•	•	•
OCP stage blocking by binary input		•	•	•	•	•	•	•	•	•	•	•	•
Directional OCP	67	•	•	•	•	•	•	•	•
Negative-sequence overcurrent	46	•	•	•	•	•	•	•	•
Switch on to fault high-speed protection	50HS	•	•	•	•	•	•	•	•	•	•	•	•
Logic Selectivity Busbar protection	68	•	•	•	•	•	•	•	•	•	•	•	•
Zero-sequence OCP (unidirectional ground-fault protection)	50N/51N	•	•	•	•					•	•	•	•
Directional ground-fault protection (directional zero-sequence power protection)	67N	•	•	•	•					•	•	•	•
Zero-sequence overvoltage protection	59N	•	•	•	•	•	•	•	•	•	•	•	•
Overvoltage protection	59	•	•	•	•
Undervoltage protection with a current-permissive instance	27	•	•	•	•	•	•	•	•
Phase conductor break protection (negative sequence or negative to positive sequence ratio current)	47	•	•	•	•	•	•	•	•	•	•	•	•
ARC-fault protection (3 optofibre sensor inputs)				•	•			•	•			•	•
Overtemperature protection		•	•	•	•	•	•	•	•	•	•	•	•
Automation functions
Auto-reclosing	79	•	•	•	•					•	•	•	•
Automatic underfrequency load shedding	81L	•	•	•	•					•	•	•	•
HV Breaker failure back-up	50BF	•	•	•	•	•	•	•	•	•	•	•	•
Automatic load transfer		•	•	•	•	•	•	•	•
Monitoring and indication functions
Breaker closing circuits supervision	74TCS	•	•	•	•	•	•	•	•	•	•	•	•
Temperature monitoring via thermal sensor	38/49T	•	•	•	•	•	•	•	•	•	•	•	•
Protection operation alarm lockout (LED and output state save until manual reset)		•	•	•	•	•	•	•	•	•	•	•	•
Internal malfunction alarm	30	•	•	•	•	•	•	•	•	•	•	•	•
Voltage transformer secondary circuits supervision		•	•	•	•	•	•	•	•
Parameter setting groups switch on binary input activation/deactivation		•	•	•	•	•	•	•	•	•	•	•	•
Service functions
Non-volatile memory event log		•	•	•	•	•	•	•	•	•	•	•	•
Non-volatile memory fault recorder with 600 s total record duration		•	•	•	•	•	•	•	•	•	•	•	•
Fault recorder on binary input activation		•	•	•	•	•	•	•	•	•	•	•	•