Phase Loss, Phase Failure, Phase Sequence, Three-Phase Unbalance and Over/Under Voltage Protection Relays

Open-phase, phase sequence, Three-phase unbalance and Over/under voltage protection relaysApplicationHHD11 series open-phase, phase sequence, Three-phase unbalance and Over/under voltage protection relay (hereinafter abbr. protection relay) is apply for AC 50Hz, 380V motor control circuitry which compose of AC contactor and other switching devices. When the motor's main circuit is on abnormal state, eg. out of phase, phase failure, voltage imbalance, etc. the protection relay will disconnect the switch contact and motor's three-phase power supply, so as to protection of the motor timely.Main Technical Data1, Working power: Three-phase 380V 50Hz, (85% to 110%) Ue fluctuations allowed. 2, Open-phase protection: Protection relay adopts sampling voltage (R, S, T front part ) and action when it detects any phase failure. 3, Phase sequence protection: When protection relay phase sequence is confirmed, if any phase line is exchanged, the motor will not start. 4, Voltage imbalance protection: for three-phase power supply, when any two-phase voltage imbalance comes to 50V ~ 75V, protection relay will act and protect the motor. 5, HHD10-C overvoltage protection: 445V ~ 465V not adjustable, delay 3s ~ 5s not adjustable; HHD10-D over-voltage protection: 400V ~ 460V (panel adjustable), delay 0.5s ~ 5s (panel adjustable) The 6, HHD10-C undervoltage protection: 290V ~ 310V is not adjustable, action delay time 3s ~ 5s not adjustable, HHD10-D over-voltage protection; 300V ~ 360V (adjustable at panel), action delay time 1s ~ 10s (adjustable at panel). 7, Open-phase protection action time 3s ~ 5s. 8, Phase sequence protection action time ≤ 0.2s. 9, Contact capacity: 3A AC250V (resistive). 10, Electrical life: 1×10 5 times. 11, Ambient temperature: -5 ºC ~ 40 ºC. 12, Alititude: ≤ 2000m. 13, Humidity: When the installation site's max. temperature is 40 ºC, the relative humidity ≤ 50%, it can allow a higher relative humidity at lower temperatures. eg. 20 ºC up to 90%. Special measures should be taken for occasional condensation due to temperature changes. 14, Installation: direct install, by DIN-rail.   /* January 22, 2024 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1