Merlin Gerin Vip300 Test Set VAP6

March 29, 2018 | Author: juanhinoatroza21 | Category: Relay, Electrical Engineering, Electronics, Power (Physics), Components


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Merlin Gerin VIP 300 protection relay Operation, testing and commissioningI Merlin Gerin I Modicon I Square D I Telemecanique LED’s. VAP6) page 4 5 6 7 8-9 Testing and Commissioning Overview of VAP6 test unit VAP6 test sequence Commissioning Ringmaster with VIP 300 12-15 10 11 3 .VIP 300 Contents Content Use and settings Relay front panel Curve selection Phase overcurrent setting area Earth fault setting area Other functions (labels. 9 t> t>> Is1. Phase overcurrent trip indicator.15 0. 7. Low set pick-up (DT only) I>.6 0.3 0.8 1. Other functions.1 0. Earth fault setting current Ios.VIP 300 Relay front panel 1 2 3 C B 4 A 5 7 8 6 9 10 phase overcurrent I> sensors: 200/1 4509996A0 VIP300LH range: x2 I> VI SI RI DT off EI DT only 1.1 0.1 0.05 0.2 1 EI 1. 8.4 0.6 x10 x1 0. Earth fault setting area (lower half of relay front panel).8 2. Phase overcurrent setting Is.5 t>> DT only 1.1 0. 5.03 earth fault Ios to> to>> (s) 1. 12.6 0.5 Io>> 9 12 15 20 trip DT (s) 3 (x Ios) off curve selection Io> 16 24 32 12 40 8 50 4 60 2 80 70 (A) 0.03 0. 3. Current transformer and range information.2 0.5 VAP6 test plug D 11 12 13 14 15 17 18 16 19 20 E Phase overcurrent setting. Red LED phase overcurrent pick-up indicator. Low set time delay to>.7 6 4 3 (s) 1. SI DT (s) curve selection (x Is) 3 (x Is) off RI trip 42 48 56 36 64 30 72 24 80 20 100 90 (A) 0. Red LED earth fault pick-up indicator. 13. E. 1. 9. 2.5 1. Multiplying factor (low set).05 0. 11.9 0.4 0.4 0.1 2.15 0.6 x10 x1 0. 17.1 2. A. Current setting scale label.2 0. Choice of low set curve type Io>.2 Is I> 10Is I>> Is reset minimum operating phase current: 20A t> Io> VI SI RI off 1.07 0. High set pick-up I>> Earth fault setting.2 0. 4. Phase setting area (upper half of relay front panel). 19. Low set pick-up (DT only) Io>. VI.07 0. 6.2 1 2. 20. 16. Earth fault trip indicator. 18.7 I>> 9 6 4 3 12 15 20 VIP300 EI. Minimum operating current. 14. High set time delay to>>.4 2. High set pick-up Io>>. VAP6 test plug socket. 15.05 (s) 0. B. High set time delay t>> 4 .05 0.4 2.4 0. Low set time delay t> Multiplying factor (low set). C. D. Choice of low set curve type I>.2 0.3 0. 10. Indicator reset button. 2 Is. as SI.2 Is 10 Is I>> Earth fault setting The principle is the same as for phase protection. low set pick-up is fixed at 1. Is F 1. The tripping order results from the “ logical OR” between the two settings.VI. Phase overcurrent setting: F I Setting current Is (4) G I Type of low set I> curve (5) IDMT: SI. J I Low set time delay to> (17) and multiplier (18) K I High set Io>>(19) L I High set time delay to>>(20) K Operation t>> L The high and low set elements operate separately. If IDMT curves are selected this switch is disabled.2 Is I> I>> 5 . VI. RI Definite time: DT H I> t> DT J H I DT low set pick-up Io> (16) This setting is only active for the low set DT curve selection (as shown). If IDMT curves are selected this switch is disabled. VI. G SI. EI. EI low set pick-up is fixed at 1. RI. EI. EI. Set: DT curve selection t G F I Setting current Ios (14) G I Type of low setting Io> curve (15) IDMT: SI. EI RI t> J K t>> L J I Low set time delay t> (7) and multiplier (8) K I High set I>>(9) L I High set time delay t>>(10) Is F 1.2 Is. as SI. Definite time: DT H I DT low set pick-up I> (6) This setting is only active for the low set DT curve selection (as shown).VIP 300 Curve selection IDMT curve selection t Phase overcurrent setting The numbers indicated below are those of the setting switches (refer to the diagram of the front panel on page 4) The letters indicate the curve characteristic as shown opposite. VI. VI. RI) the selector switch has no effect. EI : Extremely inverse time. High set time delay t>>. Phase overcurrent trip indicator. 6. I For IDMT curves (SI. 10. Off : Low set is disabled. VI. The scale label inserted should match the CT and range selected. I Low set time delay t>. The setting depends on the current transformer (CT) used. The indicator is normally black and turns yellow when the phase overcurrent has given a tripping order. Phase overcurrent setting area. Time delay is set directly in seconds. 8. High set pick-up I>>. Also refer to “indicator reset button” (page 9). 2. SI : Standard inverse time. RI : Specific curve . If the current does not decrease below the pick-up level the relay will trip. even when the relay is de-energised. Choice of low set curve. For the IDMT curve (RI). the time delay displayed on switch 7 is multiplied by 10. It is only active when the low set curve type DT is selected. For the DT curve. 6 . 5. If the tripping curve is selected with IDMT (selector switch 5 set to SI. the LED blinks when the I> pick-up setting is exceeded. VI. the high set is disabled. the value shown is the low set time delay. EI) the LED blinks when the current is greater than 1. it indicates that the low set element has picked up. In the “off” position. Multiplying factor (low set). Setting current Is. If the DT curve is selected. The switch can then be positioned to the primary current magnitude required in amperes. 9. 4. Low set pick-up (DT only) I>.VIP 300 Use and settings Phase overcurrent 1. and the range selected via the connections made to the back of the relay. When the red LED blinks. In the x10 position. VI : Very inverse time. For IDMT curves the value displayed is the tripping time for a phase current equal to 10 x Is. I I 7. EI. the LED blinks when the current is greater than the setting.2 times the setting current Is. The section numbers below are related to the numbering on the drawing shown on page 4.consult Merlin Gerin DT : Definite time. The setting is a multiple of Is. I 3. All information concerning the phase overcurrent is grouped together in the upper half of the front panel. Phase overcurrent pick-up indicator. The high set is chosen as a multiple of the current Is. It stays yellow. Setting current Ios. the LED blinks when the l> pick-up setting is exceeded. The high set is chosen as a multiple of the current Ios. In the “off” position. 16. I If the DT curve is selected. the high set is disabled. 18. The setting depends on the current transformer (CT) used. Choice of low set curve. 11. the LED blinks when the current is greater than the setting. 7 . VI : Very inverse time. 12. For IDMT curves the value displayed is the tripping time for a phase current equal to 10 x Ios. Section numbers below are related to the numbering on the drawing shown on page 4. VI. For earth fault relay operation: link between contacts 2 and 9 (x2 range) and 1 and 9 (x4 range) must be made at back of relay. Multiplying factor (low set) In the x10 position. Time delay is set directly in seconds. 17. Low set pick-up (DT only) Io>. page 9) Also refer to “indicator reset button” (page 9). 13. 19.2 times the setting current Is.B. I For IDMT curves (SI. DT : Definite time. 15.VIP 300 Use and settings Earth fault The setting principle is the same as for phase overcurrent. 14. Earth fault setting area. Low set time delay to>. The LED only blinks when the phase current is greater than the minimum operating current (refer to minimum operating current. All information concerning earth fault settings are grouped together in the lower half of the front panel. Off : Low set is disabled. RI : Specific curve. It indicates that the low set element has picked up. When the red LED blinks. EI : Extremely inverse time. The indicator is normally black and turns yellow when the earth fault element has given a tripping order. The scale label inserted should match the CT and range selected. For the IDMT curve (RI). even when the relay is de-energised. Earth fault pick-up indicator. If the current does not decrease below the pick-up level the relay will trip. It is only active when the low set curve type DT is selected. The switch can then be positioned to the primary amp value required. EI) the LED blinks when the current is greater than 1. the time delay displayed on switch 17 is multiplied by 10. High set pick-up Io>>. High set time delay to>>. For the DT curve. The setting is a multiple of Ios. It stays yellow. the value shown is the low set time delay. SI : Standard inverse time. and the range selected via the connections made to the back of the relay. Earth fault trip indicator. 20. I I I *N. The CT and range are given on each side of the setting scale label. B. refer to the application section. To remove the label. if necessary with the help of the tip of a pencil or a screwdriver. Ios 96 64 128 48 160 32 200 16 240 8 320 280 (A) Ios 192 256 128 96 320 64 400 32 480 16 640 560 (A) I x 2 range x 4 range 8 . The label will match the appropriate CT for the Ringmaster panel type supplied. Make sure the label is pushed right into the bottom of the slot. use the hole in the top. Reversible scale label for Ringmaster fitted with 800/1A CT’s I sensor 800/1: 4509169A0 VIP 300LH range: x2 sensor 800/1: 4509169A0 VIP 300LHrange: x4 Make sure that the information given on the top of the label matches: 1 . The scale label when inserted should match the CT and terminal positions on the rear of the relay. I Slide the setting scale into position behind the transparent part of the front face. and the x4 range setting currents on the other. This information is hidden when the label is inserted. x2 or x4 Is 168 224 144 256 120 288 96 320 80 400 360 (A) minimum operating phase current: 80A 192 Is 336 448 288 512 240 576 192 640 160 800 720 (A) minimum operating phase current: 160A 384 This information is hidden when the label is in position. sensor 200/1: 4509996A0 VIP 300LH range: x2 sensor 200/1: 4509996A0 VIP 300LHrange: x4 I Is 48 42 56 36 64 30 72 24 80 20 100 90 (A) minimum operating phase current: 20A Is 96 84 112 72 128 60 144 48 160 40 200 180 (A) minimum operating phase current: 40A Also refer to “testing and commissioning”.The current transformer used: 200/1A or 800/1A 2 . for the range required. behind the transparent part of the front panel.The range used. x 2 range x 4 range Choice of setting scale label. I Setting scale label The label indicates the range for the phase overcurrent and earth fault primary amp settings.VIP 300 Use and settings Other functions Reversible scale label for Ringmaster fitted with 200/1A CT’s A. The label is reversible and is printed with the x2 range setting currents on one side. Ios 24 16 32 12 40 8 50 4 60 2 80 70 (A) Ios 48 32 64 24 80 16 100 8 120 4 160 140 (A) CT and range indication. It is inserted from the top. Installation. I For help with the choice of range to select. As a result. If one of the two conditions is not met. The value given on either side of the scale label is the single phase RMS minimum operating current.The relay is energized and the minimum operating current level has been reached. and the range selected via the connections made to the back of the relay.B. When the button is pressed. The operation may be carried out while the relay is operating since the VAP6 and VIP 300 provide the possibility of testing with inhibition of circuit breaker tripping. This function may be used to carry out a basic relay operation test. the indicators do not light up. it will only take effect when there is phase current greater than or equal to the minimum operating current. N. -The relay self testing results are healthy N. I E.B. Minimum operating current The minimum operating current is the phase current required for the relay to be energized and operational. The reset button can be operated with the sealable cover either open or closed. The setting depends on the CT used. simplified relay testing. the following actions are initiated: I It resets the phase overcurrent and earth fault trip indicators. If reset is more than 48 hours after the relay has operated and is left without being energised. Fitting of reversible scale label 9 . Regarding minimum operating current: The VIP 300 does not operate below the minimum operating current level.VIP 300 Use and settings C.B. N. Also refer to the “testing and commissioning” chapter. The two red LED’s light up simultaneously for approximately three seconds to indicate the following: . VAP6 test plug The test plug is exclusively designed for connection of the VAP6 which is used for fast. if the earth fault setting (Ios) is below the minimum operating current. Indicator reset button D. the VAP6 must be used to reset the trip indicators or the operator must wait for the relay to be re-energised. + I> on battery test A B C 4 1 2 3 test in progress trip phase overcurrent trip inhibition earth fault Push buttons: 1 I Battery test: If the batteries are healthy. In this case. Also lights up when the battery test is carried out by pressing “battery test”. whether or not the circuit breaker is inhibited). 3 I Earth fault: Sends the earth fault test stimulus. which is equivalent to 20 times the earth setting current Ios. 11R VIP 12R VIP13 VIP17 VIP200. open the unit by removing the 4 screws on the bottom of the unit. . Be sure to use the correct polarities. Technical characteristics: Supply: Weight: Dimensions: 3 x 9V 6LR61 batteries 0. which is equivalent to 20 times the setting current Is. They are activated in the following cases: . . the “on” indicator(A) lights up when the button is pressed. 201 circuit breaker mitop VAP6 Batteries: I The batteries are normally deactivated and are automatically activated when the VAP6 is connected to the VIP 300.VIP 300 Overview of the VAP6 VAP6 front panel D external mitop D The VAP6 is a portable unit which is connected to the VIP 300 to carry out simplified testing.the VIP 300 is already powered up by the sensors (CT’s). It is not to be considered for the VIP 300 test (it lights up for a transient period when the VIP 300 sends a tripping order. 4 I Trip inhibition: By pressing and holding this button down the relay can be tested with the VAP6 without tripping the circuit breaker. the VAP6 batteries supply power to the relay. D I “External MITOP” output: This feature may be used to connect an external MITOP trip coil which could be used to operate a timer etc. earth fault test phase overcurrent VIP 30 VIP 35 VIP300 VIP50 VIP75 trip trip inhibition external mitop circuit breaker mitop test phase overcurrent VIP 11. B I Test in progress: Confirms sending of the test stimulus to the VIP 300. Indicators A I On: Indicates that the batteries are operating. I To install or change the batteries. This facility will inhibit the circuit breaker tripping even if a real fault occurs during the test. The external coil is triggered at the same time as the circuit breaker MITOP.Pressing the “battery test” button. The test can be carried out in the following two cases: . The trip inhibit button does not effect the external coil.The VIP 300 is not supplied. 2 I Phase overcurrent: Sends the phase overcurrent test stimulus. C I Trip: Is used to test other relays in the VIP range.Direct connection to a VIP 300 relay.45KG 93 X 157 X 45mm 10 . *If the “phase overcurrent” button is held down after tripping. Connect the VAP6 to the “VAP6 test plug”. Press the “phase overcurrent” button to send the test stimulus. In that case: . the VIP300 starts the time delay/tripping cycle again.Then the VIP 300 phase “trip” indicator turns yellow. .Depending on the time delay setting. The test consists of: . do not leave the VAP6 connected to the relay unnecessarily. and all the relay settings are effective. Press the “trip inhibition” button if the test should be carried out without tripping the circuit breaker.Initiation of the VIP 300 self monitoring and diagnostic routine.The red “I>” indicator of the VIP300 blinks during the time relay delay period. In order to save batteries. . this is normal operation. .VIP 300 VAP6 test sequence The test may be carried out with or without the relay energised by the Ringmaster current transformers.The VAP6 red “trip” indicator lights up for a transient period each time there is a trip.The circuit breaker trips if it is not inhibited.Injecting a stimulus to stimulate a phase fault. *Be sure to continue pressing the “trip inhibition” button throughout the time it takes to send the stimulus. . The stimulus injected is equal to 20 times the setting current Ios. 11 . the relay remains operational and will give a tripping order in the event of a fault.Continue pressing the button throughout the duration of the stimulus. . Use the procedure as for the phase overcurrent test. The stimulus represents about 20 times the setting current Is. During the test. The VAP6 batteries are activated and the “on” indicator lights up. . Disconnect the VAP6. Press “earth fault” to test the relays operation. -The VAP6 “test in progress” indicator lights up to confirm the sending of the stimulus to the VIP300 relay. the VIP 300 red “I>” indicator may be off or blink rapidly and/or in an irregular manner. . Therefore the parts of the VIP 300 that run on AC current are not checked using this method (input and supply circuits). unless the “trip inhibit” button is pressed and held down.Check tripping * The VAP6 is supplied by batteries. Secondary injection using standard equipment with an output filter. 5 to 7.g. 5 to 6 or 6 to 4).Always check against the relevant CB schematic diagram before carrying out tests MITOP . or 6 to 7). The integrity of the power supply of the VIP 300. The tripping times are measured with a chronometer and its accuracy is verified against the theoretical times calculated. just above the relay itself. This can be used to connect a timing device to measure the opening time of the relay and circuit breaker. Simple trip test using the VAP6 test unit (described previously). trip coil and the circuit breaker itself using primary injection to energise the system. 2. It is suggested that for commissioning and maintenance purposes either of the following two methods can be used. Once the switchgear has been installed and cabled up. it is impractical or sometimes impossible to carry out injection tests. 1. Note: When using a secondary injection set with VIP 300 a filter (e. Terminals 15 and 16 (not shown above . relay. the connection should be made across one CT (terminal rail no’s 4 to 7. Phase overcurrent connections: To test the overcurrent protection the connection should be made across two CT’s (terminal rails no’s 4 to 5. 52 7 5 3 1 x4 range 40A or 160A minimum operating current C11 C31 P1 S1 S2 P1 S1 P1 S1 4 5 6 7 8 9 C11 C31 C51 C10 8 6 4 2 x2 range 20A or 80A minimum operating current C51 C10 CT1 P2 R S2 P2 Y S2 P2 B S2 C30 C50 C90 C71 C70 VIP 300 IDMT RELAY 50/51 9 50N/51N 10 11 12 13 14 0v 10 N.see Ringmaster selection guide) give access to a normally open contact. Foster SF30) should be used to improve the wave form. . These tests include the whole protection system including current transformers.CB trip coil MITOP . The type of test plug used to connect to the DIN rail connectors is a standard 2mm 19A test plug. This is done via the sockets on the terminal rail located in the pilot cable box. wiring harness. The link to the mitop trip coil and also the circuit breaker mechanical tripping mechanism. Earth fault connections: To test the earth fault protection.ITC K8 K7 (-VE) (+VE) 15 16 connect to terminal blocks above for secondary injection Injection test set with filter CB auxiliary contact (for timing purposes) 12 .VIP 300 Commissioning Ringmaster with VIP 300 Factory tests: All Ringmaster panel types are fully tested before leaving the factory. Secondary injection: Testing using secondary injection is used to test the following parts of the protection system: I I I The electronic circuit. therefore reducing commissioning time to a minimum. Reduced commissioning: Since the system is fully tested it is only necessary to prove the relay on site at the service settings. Tripping tests are carried out using different settings for each of the IDMT and DT curves available on the relay. The integrity of the switches on the front panel to ensure they give the correct tripping times for the curves selected. which is normally open when the CB is in the open position.B. These terminal numbers should be cross checked with the relevant circuit breaker schematic diagram. I Test set connections: The injection set is connected to the VIP 300 relay without disconnecting the CT’s. If a filter is not used the operating time of the relay may not follow the theoretical operating times. When the CB has operated. . Note. Minimum Operating Current=80A Secondary Equivalent injected current primary current Range x 4. The current should then be applied. . CN2 CT ratio 200/1A Range x 2. 90mS). 2. CE2. the following tests can be carried out: 1. The actual relay operating time can then be calculated by subtracting this time from the counter reading. The VIP 300 relay can be secondary injected like any conventional 1A relay. . Pick-up check . . Calculate the secondary current to be injected from the equivalent primary current.Increase the current slowly until the appropriate LED indicator starts to blink.The time shown on the counter display includes the operating time of the circuit breaker (approx. Minimum Operating Current=20A Secondary Equivalent injected current primary current CE6.Set the current to be injected ( a true RMS ammeter should be used to measure the current). RN6 CT ratio 800/1A Range x 4. taking into account the CT’s used and the range selected by connections to the terminals on the back of the relay.No connection should be made to the MITOP trip coil from the secondary injection test set. therefore the output recommended for 1A relays should be used.VIP 300 Commissioning Ringmaster with VIP 300 Recommended test procedure for secondary injection: The test procedure outlined here is only a guide and may need modifying to suit the different test sets available.The CB should then be closed and the counter/timer reset. the applied current should be turned off if not done automatically. Minimum Operating Current=160A Secondary Equivalent injected current primary current Minimum Operating Current=40A Secondary Equivalent injected current primary current 100mA 120mA 150mA 180mA 210mA 240mA 280mA 320mA 360mA 400mA 450mA 500mA 20A 24A 30A 36A 42A 48A 56A 64A 72A 80A 90A 100A 200mA 240mA 300mA 360mA 420mA 480mA 560mA 640mA 720mA 800mA 900mA 1A 40A 48A 60A 72A 84A 96A 112A 128A 144A 160A 180A 200A 100mA 120mA 150mA 180mA 210mA 240mA 280mA 320mA 360mA 400mA 450mA 500mA 80A 96A 120A 144A 168A 192A 224A 256A 288A 320A 360A 400A 200mA 240mA 300mA 360mA 420mA 480mA 560mA 640mA 720mA 800mA 900mA 1A 160A 192A 240A 288A 336A 384A 448A 512A 576A 640A 720A 800A * * * *Note. Range x 2. The manufacturers instructions should be read before attempting to secondary inject the VIP 300 relay. With the VIP 300 connected so as to present the correct burden. RN2. These values exceed the rating of the circuit breaker 13 . Setting check: . 2 0.4 0.6 x10 x1 0.5 Io> VI SI RI off EI Io>> 2.2 0.8 1.2 0.05 0. Setting range.5 1.9 t> t>> Is1. 40A x2. 20A x4.4 0. 48 42 56 36 64 30 72 24 80 20 100 90 (A) minimum operating phase current: 20A Is 96 84 112 72 128 60 144 48 160 40 200 180 (A) minimum operating phase current: 40A Is 192 168 224 144 256 120 288 96 320 80 400 360 (A) minimum operating phase current: 80A Is 384 336 448 288 512 240 576 192 640 160 800 720 (A) minimum operating phase current: 160A 68 Ios 24 16 32 12 40 8 50 4 60 2 80 70 (A) Ios 48 32 64 24 80 16 100 8 120 4 160 140 (A) Ios 96 64 128 48 160 32 200 16 240 8 320 280 (A) Ios 192 256 128 96 320 64 400 32 480 16 640 560 (A) Setting scale label selection to be located at point “A” for appropriate CT type 200/1A & 800/1A phase overcurrent I> A I> VI SI RI DT off EI DT only 1.5 1.3 0.1 2. Ensure connections on the rear of the relay are made to the appropriate terminals for the x2 or x4 setting ranges and that the scale labels are inserted correctly to match the range selected. 200/1A sensor 200/1: 4509996A0 VIP 300LH range: x2 sensor 200/1: 4509996A0 VIP 300LHrange: x4 sensor 800/1: 4509169A0 VIP 300LH range: x2 800/1A sensor 800/1: 4509169A0 VIP 300LHrange: x4 Is Mark settings with an arrow e. Relay type Current transformers site Panel Relay serial no.15 0.3 0.2 0.1 0.03 0.6 x10 x1 0.2 1 trip DT (s) 3 (x Ios) off curve selection 0.07 0. 80A x4.03 t> reset t>> DT only (s) 1.8 1. Customer Contact ref.2 1 2.1 2. SI DT (s) curve selection (x Is) 3 (x Is) off RI trip 0. VI.05 (s) earth fault to> to>> (s) 1.05 0.1 0.VIP 300 Commissioning Ringmaster with VIP 300 Commisioning test record: Secondary injection of Merlin Gerin VIP 300 self powered overcurrent and earth fault relay. 160A  tick as appropriate I 200/1A 800/1A Note.g.07 0.4 0.05 0.7 I>> 9 6 4 3 12 15 20 VIP300 EI.1 0.1 0.6 0.4 0.5 VAP6 test plug 14 . Indicate on the diagram below actual settings.2 Is I> 10Is I>> 0.4 2.7 6 4 3 9 12 15 20 1. Miniumum operating current x2.4 2.9 Io> 0.15 0.6 0. Carry out tests and record the results in the table provided. Check test facility using VAP6 Commissioning engineer Customer witness Date Date 15 .. Curve..... Current level to trip high set Commissioning test record 4..VIP 300 Commissioning Ringmaster with VIP 300 Commissioning test record 1..T....... Operating time and curve at final selected setting 3....... Phase B-C Phase C-A Curve..... Pick-up current at setting 2. Inject the test current into the relay for each phase in turn and note the current required to flash the LED. Pick up check... Operating time and curve check at final settings...... Inject the test current into the relay for each phase in turn and note the operating times........ EF 1.......... 2.. Phase A-B T.... 3.. Instantaneous trip check Inject the appropriate test current into the relay and ensure the correct instantaneous response.... Leeds LS6 2BN.co.PB1197 LIP2000W O/S-BP .MediumVoltage Meanwood Road.I Merlin Gerin I Modicon I Square D I Telemecanique Merlin Gerin . Tel: 0113 275 7121/7 Fax: 0113 274 3698 Internet address: http://www. Publication No.schneider.uk.
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