Voltage control relays suitable for both AC and DC voltage control, available for din rail mounting. The standard units have three selectable via terminal taps voltage ranges from 0.1 to 400VDC (0.1 to 283VAC). Also available are dedicated range “high voltage” control units which are most suitable for “railway traction voltage” monitoring. “Auto Reset” without latching mode. This mode is determined by EC & B1 left open. The output relay is energised when the monitored voltage rises above the level selected via the front potentiometer. The output relay will de-energise when the voltage falls back below the level selected less the set hysteresis adjustable 5 to 50% set via a second potentiometer. If the separate auxiliary supply is lost at any time the relay will also de-energise.
“Manual Reset” latching mode. This mode is determined by a wired link between terminals EC & B1. The output relay energises when the monitored voltage rises above the level selected via the front potentiometer. Once energised the output relay will remain latched even if the monitored voltage falls below the set level less any selected hysteresis. Resetting is achieved by opening the link between terminals EC & B1 or by removing the auxiliary supply. If whilst resetting the monitored voltage is still above the set level a reset will not be achieved. It is normally preferable in the latching mode to have the adjustable hysteresis and time set at minimum.
Adjustable Time Delays - The YWRU.T10 voltage relays have 2 independently adjustable 0.1-10 secs time delays. There is a delay on rising voltage when the monitored voltage rises above the set level as selected by the front potentiometer and a delay on falling voltage, when the monitored voltage falls below the set level plus the hysteresis.
DC Auxiliary Supply Versions - DC auxiliary supply versions are as standard non isolated. For these versions the supply and the measured current must be isolated from each other and must not exceed 50V DC. On request at extra cost isolated versions can be manufactured utilising internally a DC to DC converter.
Supply & Measuring
Nominal supply tolerance: ±15%
Isolation AC versions: Via transformer
Isolation DC versions:
No as standard
Yes via optional internal DC to DC converter
Power consumption: 3VA max
Hysteresis: Adjustable 5 to 50% of Ue
±2% at constant ambient
±5% across temperature range
0.1-10 Sec on make
0.1-10 Sec on break
Output contacts: SPCO 10Amps/250V AC1
Mechanical life: 30 Million ops
Electrical life: 200K ops at max rated load
Operating temperature: -20°C to +65°C
Storage temperature: -20°C to +65°C
Max cable size: 4mm
CE marked: Yes
In accordance with:
Housing material: Polycarbonate, Auto extinguishable to UL 94 V-0
YWRU.T10 (Din rail)
YWRU.T10/700V (Din rail)
YWRU.T10/1000V (Din rail)
YWRU.T10/1500V (Din rail)
* No isolation on DC versions as standard, on request at extra cost isolated versions are available.
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