remote control equipment - Indian Railways Institute of Electrical ...

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iii) Oil tempreature indicator alarm and trip iv) Buchholz alarm and trip v) Auxiliary unit in defferenthial relays 5.6.3 In addition, wherever necessory for proper functionig of scheme hand reset contact in auxiliary relays shall also be provided.All the protective relays and all those associated auxiliary relays in the circuit of alarm and annunciations etc including inter trip relays shall have flag type operation indicators with manual reset service suitable for operation from the font of relay cases. 5.6.4 The current coil can be rated for the continuous current of 5A.The voltage coils shall be rated for 110Vdc.The contact of relays shall be silver plated. The current coil shall be capable of withstanding 20% overload for 8hrs. 5.6.5 The relays shall be test voltage class 2 as per clause 3.2 of IS 8686-1977 5.6.6 The auxiliary relay coils shall be designed for continuous service voltage of 110 V dc and shall be capable of satisfactory operation up to atleast-20% fluctuation in voltage 5.6.7 The output of relays shall be capable of operating the armature attracted type auxiliary relay which shall have a burden of above 20VA at 110V dc. 5.6.8 the relays shall have name plates with rating data, serial number and manufacture’s name marked on them .The metal case shall be provided with seprate earthing terminal. 5.6.9 The basic requirement of the scheme of protection are indicated in clause 20 to 23. The tender shall furnish full detail of the protective scheme offered together with the characteristics of relays and typical circuit diagram. 5.7 STATIC TYPE RELAYS The Indian Railways have been using Electro Mechanical type relays manufactured by Ms English Electric co. of india ltd.,(GEC-ALSTHOM) for 25KV Traction sub-station. SN Description type Rating/setting design range A) TRANSFORMATION PROTECTION 1. Tra’nsformer percentage DDT-12 Current setting 40baised diffrential -100%of 5A,20%,30% or 40% 5A Bias setting 2. IDMT overcurrent relay CDG-26 CDG 16,80-320% of 5A combined with CAC-13 CAG-13 400-1600% of 5A instateneous high set overcurrent(132KV sdide) CAG-14 10-40% Of 5A 3. Restricted earth 101
fault relay (132KV&25KV side) 4. IDMT overcurrent relay CDG-16 80-320% Of 5A (25kv side) 5. Aux relays for buchholz VAA-33 excessive winding and oil tem tripping B) OHE PROTECTION 1 MHO type directional YCG-14 0.33 to 12 ohm extended distance protection zone each upto 60 ohm relay(DPR) of 5A with MTA 75 de gree 2 MHO relay for protection YCG-14 0.33 to 12 ohm extended against wrong phase zone reach upto 60 ohm coupling(WC) of 5A with MTA 125 de gree with forward offset of 11% 3. Instantaneous high set CAG-17 100-800%of 5A over current relay on 25KVside(OC) C) AUXILIARY RELAYS 1 D.C Supervision i) Transformer HV CB VAA-11 Trip supervision ii) Transformer LV CB VAA-11 iii) 25KV Feeder control VAA-11 iv) 25KV intrruptor control VAA-11 v) 5.DC fail alarm cancel VAA-11 vi) Alarm annunciation VAA-11 control SN Discription Type Rating/setting design range 2. Auxiliary realy for VAA-11 contact multiplication of directiional distance protection relay(YCG-14) 3. Alarm bell realy VAA-21 4. Flasher relay VAA-21 5. Timer relay for single VAT-11 shot Auto-Reclosing 102
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PREFACE The book on "Power Supply I
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However transformers of capacity 13
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3. To keep the unbalance on the 3 p
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1.2 POWER SUPPLY FOR SIGNALLING 1.2
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locomotives and Electric Multiple U
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2.0 Supply System 2. POWER SUPPLY F
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figures. This charge should be real
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2.4 Scrutiny of Bills have a bearin
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c) Procedure to be followed in case
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In the territorial setup one Subord
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3.2.3 Over load Capacity of Tractio
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B. Insulation resistance will conti
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3.3. GUIDING NOTES ON MAINTENANCE 3
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f) Fully push home the wedges betwe
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eakers/interrupters should also be
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A detail history of every battery s
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light or bluish grey according to a
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(e) Overhaul, bench tests and calib
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3.5. FORTNIGHTLY MAINTENANCE 3.5.1.
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obstruction and also if the shock a
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2. Test a sample of oil for BDV. 3.
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3. Check if the terminations of the
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Fortnightly Schedule: a) Drain wate
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d) Measure the IR between auxiliary
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TRACTION DISTRIBUTION SCHEDULE OF M
Page 53 and 54: 3.0 Inspection of Traction Sub-stat
Page 55 and 56: 4.0 Switching Stations a) Switch Ya
Page 57 and 58: SI. No . APPLICATION AND INTERPRETA
Page 59 and 60: 2.2 Oxidation Carbondioxide is the
Page 61 and 62: 3.4 Pattern of generation of gases
Page 63 and 64: TABLE - I SOLUBILITY OF DIFFERENT G
Page 65 and 66: TABLE V ROGER'S METHOD OF DIAGNOSIS
Page 67 and 68: 1.1 Schedules MAINTENANCE OF SF6 CI
Page 69 and 70: Point / Location Tripping Mechanism
Page 71 and 72: 1.0 General Annexure 3.05 MAINTENAC
Page 73 and 74: 1.5 Detailed Check Checking shall b
Page 75 and 76: DESIGN ASPECTS OF TRACTION SUBSTATI
Page 77 and 78: • Characteristics of the locomoti
Page 79 and 80: considerations enlisted in para 4.0
Page 81 and 82: xii) Load losses 135.0 kW xiii) Cur
Page 83 and 84: item Nominal System Voltage 66kV 11
Page 85 and 86: 20 1250 1600 2000 245 31.5 1250 160
Page 87 and 88: i) Three post, centre post rotating
Page 89 and 90: etween live parts and different pot
Page 91 and 92: 4.11.5 Design of grounding system 4
Page 93 and 94: 4.12.2 BIL of various equipments us
Page 95 and 96: (d) High speed inter tripping relay
Page 97 and 98: The relay continuously monitors the
Page 99 and 100: SULFUR HEXAFLUORIDE(SF6) GAS 96 ANN
Page 101 and 102: 5.0 POWER SUPPLY SYSTEM PROTECTION
Page 103: any one of the two sub-staion throu
Page 107 and 108: will be supplied to the successful
Page 109 and 110: detected by normal distance protect
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Page 125 and 126: Just as the requirements of supervi
Page 127 and 128: The use of hermetically sealed comp
Page 129 and 130: The configuration used in Railway S
Page 131 and 132: This may be accomplished by several
Page 133 and 134: A typical example of commonly used
Page 135 and 136: 7.2.6.2The above sequence of messag
Page 137 and 138: 7.3 SCADA EQUIPMENT 7.3.1 General T
Page 139 and 140: 7.3.10 SCADA Software The operating
Page 141 and 142: systems are different, the basic fe
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Page 145 and 146: To combat interference, co-ordinate
Page 147 and 148: e = Er / R were introduced in the v
Page 149 and 150: It is seen that even if the lines a
Page 151 and 152: Fig. 8.3 Fig. 8.3 contains a family
Page 153 and 154: Typical Rail Current Distribution F
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8.8 SUPPRESSION OF INTERFERENCE AT
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Magnetizing current is required to
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REGULATION FOR ELECTRICAL CROSSING
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Kc is cable screening factor and it
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