Quick Start Guide
www.schrack.com
Danger! Never carry out work on live parts!
Danger of fatal injury!
The product must not be used in case of obvious damage!
To be installed by an authorized person only!
• The full operation manual is available at:
www.schrack.com - search key URNA0345-B This Quick Start Guide does not replace the
manual and the owner should read it in conjunction with the full manual.
• The safety instructions are to be observed
Intended use:
The SCHRACK URNA0345 is a multinational grid and system protection unit, that protects energy generation
plants ( like combined heat and power plants, wind generators, waterpower plants, photovoltaic plants).
In case of power failures or net anomalies, power gererating plants have to be disconnected immediately
from the mains supply to avoid unintentional feeding to the grid. On the one hand continuing grid
feeding could endanger maintenance stas, on the other hand connected devices could be exposed to
inadmissible voltages and/or frequencies.
In case the grid operator requires thresholds and settings that are not conforming with the local standards,
it is possible to set thresholds outside the normative dened range!
Outside these range the device is not in accordance with the standards anymore and the corresponding
certicate loses validity! This state is indicated as „ncnf“ [none conformity] on the display.
Settings outside the conformity range are therefore in responsibility of the operator respectively the
acceptance authority!
Dimensions:
Controls elements:
Legend Marking Type Function
1 R1, R2, R3 LED (yellow) Status indication output relays
2 ENT Pushbutton ENTER, Input conrmation, menu level forward
3 ESC Pushbutton ESCAPE, Input rejection, menu level back, test/reset
4 - Pushbutton Change parameters, menu navigation
5 + Pushbutton Change parameters, menu navigation
6 PROG Pushbutton (sealable) PROGRAM, enter program mode
7LCD-Display 4x20
characters Display
Terminals:
A1, A2 Supply
DC: 24V
AC: 110 - 230V @ f: 48-63 Hz
A1: L (+)
A2: N (-)
L1, L2, L3, N Measuring input UN: 3x400V AC
11, 12, 14 Relay channel A (CO contact)
Status indication via yellow LED R1
Isolated changeover contact
11: Common
12: Normally closed contact
14: Normally open contact
21, 22, 24 Relay channel B (CO contact)
Status indication via yellow LED R2
Isolated changeover contact
21: Common
22: Normally closed contact
24: Normally open contact
31, 32, 34 Relay channel D (CO contact)
Status indication via yellow LED R3
Isolated changeover contact
31: Common
32: Normally closed contact
34: Normally open contact
I1, ┴Digital input 1
(Feedback contact contactor A)
Contact input (24V/5mA), congurable
Input active: I1 connected to ┴
I2, ┴Digital input 2
(Feedback contact contactor B)
Contact input (24V/5mA), congurable
Input active: I2 connected to ┴
Does not apply to national standards without
functional safety!
I3, ┴Digital input 3
(Remote disconnection)
Contact input (24V/5mA), congurable
Input active: NO->I3 to ┴ (std); NC->I3 open
I4, I5, ┴Digital inputs 4 und 5
(Parameter switchover)
Applies to CEI 0-21
Contact input (24V/5mA)
Input active: I4 or I5 connected to ┴
Technical data:
Supply circuit
Supply voltage: DC: 24V AC: 110 - 230V
Supply voltage tolerance: DC: ± 10% AC: ± 30%
Nominal consumption: max. 1,25W / 4VA @ 230V AC
Rated frequency: 50 / 60Hz
Tolerance of rated frequency: 48 - 63Hz
Rated surge voltage: 6 kV
Internal protection: 250V / 500mA slow blow (soldered)
In order to ensure the proper function during power failures, an external UPS has to be used.
Measuring circuit
Measuring input: 3 x 400V AC
Input impedance: 1MΩ
Measurand: line to line voltage, line to neutral voltage,
10 minutes average voltage, frequency,
rate of change of frequency (RoCoF), phase shift (PShift)
Measuring ranges
Line to line voltage: 0 - 560VAC
Line to neutral voltage: 0 - 325VAC
Frequency: 40 - 65Hz
RoCoF: 100mHz/s … 2.000mHz/s
Pshift: 1 - 15°
Overload capacity: Permanent 1,4 x UNom Pulse 1,6 x UNom (1 second)
Overvoltage category: III
Rated surge voltage: 4 kV
Digital inputs
Type of contact: Isolated, max. wire length <30m, control wiring standards
to be taken in account. The ┴ are not connectied to each other.
Min. switching voltage/ switching current:
24V DC / 5mA
Output circuit
Number of contacts: 3 changeover contacts
Contact material: AgNi
Rated current: 5A / 250V AC
Electrical endurance: 100 x 103switching cycles (AC-1)
Mechanical endurance: 15 x 106switching cycles
Continous current value: 5A
Short time value (1s): 5A
Withstanding voltage across open contacts:
Relay contacts: 1000Vrms Terminals: 450Vrms
Overvoltage category: III
Rated surge voltage: 4 kV
Protection: 5A fast blow
Accuracy
Voltage monitoring:
Base accuracy: < 0,5% @ +25°C
Temperature inuence: < 0,01% / °C
Resolution: 10mV
Frequency monitoring:
Base accuracy: < 0,01Hz @ +25°C
Temperature inuence: < 0,0002Hz / °C
Resolution: 1mHz
Isolation data
Rated insulation voltage: 400V
Supply circuit / Measuring circuit: protective insulation
Supply circuit / Output circuit: protective insulation
Supply circuit / Digital inputs: protective insulation
Output circuit / Measuring circuit: basic insulation
Output circuit / Digital inputs: basic insulation
Environmental conditions
Ambient temperature operation: -25 … +55°C
Ambient temperature storage: -40 … +70°C
Visibility temperature display: -15 … +55°C
Relative humidity: 5 … 95% (non-condensing)
Pollution degree: 2
Weight: 300g
Electrical connection
Wire size: max. 2,5mm2
Stripping length: max. 8mm
Electrical strength: max. 450V/16A (digital inputs; relay outputs)
max. 750V/16A (measuring inputs)
Torque: max. 0,5Nm
Screw: M3, slot screwdriver 0,6 x 3,5mm
Protection class Terminals: IP20 Housing: IP20
Seal wire max. diameter <=1,25mm
Safety advice:
The device was developed, produced and tested in accordance to the latest industry standards.
Nevertheless improper handling or use can endanger humans and machines.
Please use the device only in accordance with the installation and operating instructions. Check for secure
assembly and good condition. Moreover, the rules and regulations on accident prevention applicable to
the place of use must be strictly followed.
• Eliminate all faults immediately which may endanger safety!
• Do not make any unauthorised changes and only use replacement parts and optional
accessories purchased from or recommended by SCHRACK!
• In case of obvious damage the device must be checked and replaced if necessary!
• Country specic regulations have to be considered in any case!
• If required by national standards, the URNA0345 has to be protected against unauthorized
changes by password and/or sealing!
Mounting on DIN rail according to EN 60715:
Snap the rear mounting clip of the device into place in such a way that a safe and tight t is ensured.
Available congurations/Local standards:
CEI 0-21:2019, VDE 0126-1-1:2013, VDE 0124-100:2013, VDE 4105:2018 <50kW, VDE 4105:2018 >50kW,
VDE 4105:2018 Umr, G59/3/3:2015 LV, G99/1/3:2018 LV, G59/3/3:2015 MV, G99/1/3:2018 HV, G83/2:2012,
G98/1/2:2018, C10-11:2012 LV, C10-11:2019 LV-IP, C10-11:2019 LV-ASS, C10-11:2012 MV, C10-11:2019 HV-IP,
C10-11:2019 HV-ASS, TR3 Rev23:2013, VDE 4110:2018 TR3-25, OVE E 8001/8101:2014, OVE TOR R25 NS SYNC,
OVE TOR R25 NS ASYNC, OVE TOR R25 MS SYNC, OVE TOR R25 MS ASYNC, OOE TOR R25 NS SYNC, OOE TOR R25
NS ASYNC, OOE TOR R25 MS SYNC, OOE TOR R25 MS ASYNC, EN50438:2013, EN50438:2013 DK,
NRS 097-2-1:2017, AS/NZS 4777.2:2015, OPEN SETUP
URNA0345-B doc no.: 090752C
