MiCOM P921/P922/P923 - Schneider - error

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P92x/EN GS/F22Page 10/22Getting StartedMiCOM P921/P922/P923• Under the bottom hinged cover:−−Former battery compartment (holds a ½AA size battery which was used formemory back-up for event, fault and disturbance records (P922 and P923 only)).a 9-pin female D-type front port for communication with a PC locally to the relay(up to 15m distance) via a RS232 serial data connection (SK1 port).The fixed function LEDs on the left hand side of the front panel are used to indicate thefollowing conditions:LEDS Colour Labels SignificanceLED1 Red Trip. LED 1 indicates when a trip order has been issuedby the relay to the cut-off element (circuit breaker,contactor). This LED recopies the trip order issuedto the trip output contact (RL1). Its normal state isunlit. It is illuminated as soon as a trip order isissued. It goes out when the associated alarm isacknowledged (by pushing the key).LED2 Yellow Alarm LED 2 indicates that an alarm has been registeredby MiCOM P921, P922 or P923 relays. The alarmsare either threshold crossings (instantaneous), ortripping orders (time delayed). The LED will flashuntil the alarms have been accepted (read), afterwhich the LED will change to constant illumination,and will extinguish when the alarms have beencleared.LED3 Orange Equip Failure LED 3 is dedicated to the internal alarms of MiCOMP921, P922 and P923 relays. When a « noncritical » internal alarm (typically communicationFault) is detected, the LED flashes continuously.When the Fault is classed as « critical », the LED isilluminated continuously. The extinction of this LEDis only possible by the disappearance of the causethat caused its function (repair of the module,disappearance of the Fault).LED4 Green Aux Supply LED 4 indicates that MiCOM P921, P922 and P923relays are in correct working order.LED5 toLED8Red Aux1 to Aux4 These LEDs can be programmed by the user on thebasis of information on available thresholds(instantaneous and time-delayed). The user selectsthe information he wishes to see associates witheach LED from the menu element (Logic OR). EachLED illuminates when the associated information isvalid. The extinction of each LED is linked to theacknowledgement of the associated alarms.
Getting StartedP92x/EN GS/F22MiCOM P921/P922/P923 Page 11/228. RELAY REAR DESCRIPTIONP0386XXaFIGURE 2: RELAY MiCOM P921, P922 AND P923 REAR VIEWP922 & P923 only P921, P922 and P923 P921, P922 and P923Common Output5 1 2 Common Output1 Case earth 29 30 RS485 (resistance)Output5 3 4 Ouput1 (NC) RS485+ 31 32 RS485–Common Output6 5 6 Output1 (NO) Vaux (+) 33 34 Vaux (–)Output6 7 8 Common Output2 Relay faulty 35 36 Common "Watchdog"Common Output7 9 10 Output2 (NC) Relay healthy 37 38 Not usedOutput7 11 12 Output2 (NO) Not used 39 40 Not usedCommon Output8 13 14 Common Output3 VA 41 42 Common VAOutput8 15 16 Output3 VB 43 44 Common VBInput3+ 17 18 Common Output4 VC 45 46 Common VCInput3– 19 20 Output4 Not used 47 48 Not usedInput4+ 21 22 Input1+ VR 49 50 Common VRInput4– 23 24 Input1– Not used 51 52 Not usedInput5+ 25 26 Input2+ Not used 53 54 Not usedInput5– 27 28 Input2– Not used 55 56 Not usedNOTA:- By default, the output contact n°1 is associated to the tripcommand, which is defined in the menu « AUTOMAT. CTRL »,sub-menu « TRIP OUTPUT RLY »- MiCOM P921 hardware only provides 2 logic inputs and 4 outputcontacts.
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MiCOM P921/P922/P923 - Schneider - error

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