Article no.: EL200158
Voltage monitoring in 3-phase system, voltage in 2 ranges: 160-276V (3x400/230V) or 280-480V (3x400V)
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The relay is used for monitoring 3-phase systems. HRN-43N monitors the voltage to the neutral conductor, HRN-43 monitors the voltage between phases. The relay monitors and checks: Voltage in 2 levels (over-/undervoltage), phase asymmetry, phase sequence and phase failure. Each fault state is indicated by its own LED. By means of DIP switch (no. 3) it is possible to determine the function of the second relay - whether it works independently (1x overvoltage, 1x undervoltage) or in parallel. Delay t1 (fixed) - during transition from fault state to normal state or during voltage failure and t2 (adjustable) - during transition from normal state to fault state. The delays prevent line faults and flicker in the output at short-term peaks in the network.
The upper level Umax is set in the range 138-276V (or 240-480V for type HRN-43) and the lower level Umin in the range 35-99% of the Umax. If a phase deviates from the set range, the output relay switches off after the set delay (which prevents short-term voltage peaks). The output relay contact switches on again when the voltage lies again within the set range and exceeds the fixed hysteresis (which can be set in 2 levels by DIP switches).
Checks the correct phase sequence. If an undesired change is made, the output contact is switched off; if the device is switched on with an incorrect phase sequence, the output contact is always switched off.
The asymmetry part between the individual phases is set in the range 5-20%. If the set asymmetry is exceeded, the output relay contact switches off and the LED indicating the asymmetry lights up. Delay t1 and t2 and hysteresis take effect during the transition to the normal state.
|Operating voltage||AC 110 V, AC 230 V, AC 400 V or AC/DC 24 V (AC 50-60Hz)|
|Power consumption||max. 4.5 VA|
|Switching output||250 V AC1 / 24 V DC|
|Mechanical life||3 x 10^7|
|Connection||screw terminals 2.5mm²|
|Max. ambient temperature||-20°C to +55°C|
|Storage temperature||-30°C to +70°C|
|Voltage limitation class||III|
|Design||DIN rail plastic housing light grey, snap-on on 35mm DIN rail 3 HP|
|Umax [V]||Umax setting|
|t2 [s]||Delay t2|
|Umin [%Umax]||Umin setting|
|ASYM [%]||Asymmetry setting 5-20%|
|DIP-2||OFF||Memory function inactive|
|ON||Memory function active|
|DIP-3||1||2nd relay parallel|
|2||2nd relay independent|
|DIP-4||5%||Hysteresis setting 5%|
|10%||Hysteresis setting 10%|
|<>U||Display undervoltage, overvoltage, failure|
|Arrows||Display phase sequence|
|Star||Display of asymmetry|
|N||N Monitoring (HRN-43N only)|