Electronic residual current protection relay with built-in 28 mm transformer, forming a single unit. Super-immunised type-A, with high-frequency current filtering and high immunity. True root mean square (TRMS) measurement.
Key Features
Display with LEDs and display:
Residual current protection parameters.
Protection trip current.
Protection status messages, etc.
Unit with three programmable contact output relays, one switched and two single. The main relay is for the protection associated with the contact or trigger relay of the circuit breaker while the two others are for the prealarm.
It also has a voltage-free input for external tripping and rearming.
Assembly on DIN 46277 rail (EN 50022), 3 modules.
Connection by pluggable terminal strips.
Technical Specifications
AC power supply
WRU-10-HS AC power supply
Nominal voltage
230 V ~ ±30%
Frequency
50/60 Hz
Consumption
4,5 VA
Installation category
CAT III 300 V
External reset input for tripping
WRU-10-HS External reset input for tripping
Type
Voltage-free, not insulated
Varistor characteristics
WRU-10-HS Varistor characteristics
Maximum voltage
420 V ~, 10 A ~
Digital relay outputs
WRU-10-HS Digital relay outputs
Nominal voltage
230 V ~
Nominal current
0,25 A ~
Nominal load
62,5 VA
Other digital relay outputs
WRU-10-HS Other digital relay outputs
Nominal voltage
250 V ~
Nominal current
5 A ~
Nominal load
1250 VA
User interface
WRU-10-HS User interface
Display type
LCD
LED
2 LEDs
Keyboard
7 keys
Environmental characteristics
WRU-10-HS Environmental characteristics
Working temperature
-20 … +70 °C
Storage temperature
-25 … +75 °C
Relative humidity (without condensation)
5 … 95%
Protection class
IP41 (Front) / IP20 (sides and back cover)
Mechanical characteristics
WRU-10-HS Mechanical characteristics
Envelope
Plastic V0 polycarbonate
Fastening
DIN rail (with accessory)
Weight (kg)
0,1
Size (width × height × depth)
52.5 × 109.4 × 75 mm
Protection
WRU-10-HS Protection
LED indication
Power supply voltage / Earth leakage tripping / Pre-alarm latching
Measure
True root mean square (TRMS)
Differential protection
WRU-10-HS Differential protection
Type
Type A ultra-immunised
Sensitivity (I∆n), A
0,01-0,02-0,03-0,1-0,3-0,5 by direct setting
Delay time (t∆)
INS / SEL / Direct setting: 0.02 … 1 s
Standards
WRU-10-HS Standards
Standards
IEC 60947-2, IEC 60755, IEC 62020
Certifications
CE, CMim
Electrical safety, Maximum height (m)
2000
Electrical safety
WRU-10-HS Electrical safety
Insulation
Double-insulated electric shock protection class II
Applications
WRU-10 relays enable smart differential protection. Their design features guarantee maximum security and electrical service continuity, avoiding unwanted tripping.
Viewing the instantaneous leakage value on the display, together with the prealarm indicators, makes it possible to obtain information on the status of lines to be protected, and to perform adequate preventive maintenance.
Need more detailed information?
View the official product documentation, manuals and technical resources.
