MiCOM P921/P922/P923 - Schneider - error

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P92X/EN IN/F22Page 10/12InstallationMiCOM P921/P922/P9236. CASE DIMENSIONSMiCOM P921, P922 and P923 relays are available in a 4U metal case for panel or flushmounting.Weight: 1.7 to 2.1 KgExternal size: Height case 152 mmfront panel177 mmWidth case 97 mmfront panel103 mmDepth case 226 mmfront panel + case 252 mm9739 3926 26All dimensionsin mm168158Panel cut-outFlush mounting fiwing details1034 holes Ø 3.4 49.5 49.5 4 holes Ø 4.4 (M4 screw)25.1 226MiCOMP121IA = 214.50ATripAlarmEquip.failAuxiliarysupplyC177151.2 max.AUX. 1AUX. 2AUX. 3AUX. 4Flush mountingP0001ENaFIGURE 2: MiCOM P921, P922 AND P923 RELAYS CASE DIMENSIONSNOTE:The chassis is normally secured in the case by four screws (Self tapscrews 6x1,4), to ensure good seating. The fixing screws should befitted in normal service (do not add washers). Do not discard thesescrews.
InstallationP92X/EN IN/F22MiCOM P921/P922/P923 Page 11/127. RELAY WIRINGThis section serves as a guide to selecting the appropriate cable and connector type foreach terminal on the MiCOM relay.Before carrying out any work on the equipment the user should be familiar with the contentsof the Safety Section/Safety Guide SFTY/4LM/D11 or later issue and the ratings on theequipment’s rating label.7.1 Medium and Heavy Duty Terminal Block ConnectionsLoose relays are supplied with sufficient M4 screws for making connections to the rearmounted terminal blocks using ring terminals, with a recommended maximum of two ringterminals per relay terminal.If required, AREVA can supply M4 90° crimp ring terminals in five different sizes dependingon wire size (see Table 3 and Table 4). Each type is available in bags of 100.Part number Wire Size Insulation ColourZB9124 901 0.25 – 1.65 mm 2 (22-16AWG)RedP0404XXaZB9124 9001.04 – 2.63 mm 2 (16-14AWG)BlueP0405XXaZB9124 904 2.53 - 6.64 mm 2 (12-10AWG) Uninsulated*TABLE 3: M4 90° CRIMP RING TERMINALSPart numberWire SizeZB9128 015 0.75 – 1.5 mm 2 P0406XXaZB9128 016 1.5 –2.5 mm 2 P0407XXaTABLE 4: M4 CRIMP RING TERMINALS* To maintain the terminal block insulation requirements for safety, an insulating sleeveshould be fitted over the ring terminal after crimping.The following minimum wire sizes are recommended:− Auxiliary Supply, Vx 1.5 mm 2− RS485 port See separate section− Other circuits 1.0 mm 2Due to the limitations of the ring terminal, the maximum wire size that can be used for any ofthe medium or heavy duty terminals is 6.0 mm 2using ring terminals that are not preinsulated.Where it required to only use pre-insulated ring terminals, the maximum wire sizethat can be used is reduced to 2.63 mm 2 per ring terminal. If a larger wire size is required,two wires should be used in parallel, each terminated in a separate ring terminal at the relay.The wire used for all connections to the medium and heavy duty terminal blocks, except theRS485 port, should have a minimum voltage rating of 300Vrms.It is recommended that the auxiliary supply wiring should be protected by a 16A high rupturecapacity (HRC) fuse of type NIT or TIA. For safety reasons, current transformer circuits mustnever be fused. Other circuits should be appropriately fused to protect the wire used.
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MiCOMP921/P922/P923Voltage and Freq
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