T&R KV mk2 Series Operating And Maintenance Manual Download Page 8 | Manualshive

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8

1.1.2

Partial Discharge Level

The  partial  discharge  of  the  standard  units  in  the  KV  series  range  is  not  specified.    Two
models  in  the  range  (the  KV50-200LD  and  KV100-100LD)  have  specified  partial  discharge
levels  and are supplied with a brush noise filter to prevent noise from the supply and control
unit  variable  transformer  being  transmitted  through  to  the  HV  output.  The  partial  discharge
levels specified for the KV series are shown in the table below.

Unit

Maximum Partial Discharge

Brush Noise Filter Supplied

KV30-100

Not specified

No

KV50-100

Not specified

No

KV50-200

Not specified

No

KV100-100

Not specified

No

KV50-200LD

1pC

Yes

KV100-100LD

3pC

Yes

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Summary of Contents for KV mk2 Series

Page 1: ...V50 100 mk2 KV50 200 mk2 KV100 100 mk2 low discharge LD and timer T options DESIGNED AND MANUFACTURED IN THE UK BY T R Test Equipment Limited 15 16 Woodbridge Meadows Guildford Surrey GU1 1BJ United Kingdom Telephone 01483 207428 e mail sales trtest com Fax 01483 511229 Web www trtest com ...

Page 2: ...ted to a local earth Ensure that the unit is properly grounded before making any connections to inputs or outputs Output ratings must be observed to prevent fire hazards and risk of injury to the operator Consult the product manual for ratings information before making any connections It is ESSENTIAL to consult the product manual for rating information before making any connection to a terminal or...

Page 3: ...test specimen As a minimum the current capacity of the ground leads should exceed that necessary to carry the maximum possible ground current The effect of ground potential rise due to the resistance and reactance of the earth connection should be considered Precautions should be taken to prevent accidental contact of live terminals by personnel either by shielding the live terminals or by providi...

Page 4: ... The following safety symbols appear in this manual CAUTION This action or procedure may be dangerous if not carried out correctly and may cause damage to the equipment or connected equipment WARNING This action or procedure may be cause injury or death to the operator or other personnel if not carried out correctly using applicable safety procedures ...

Page 5: ... 5 Overload Protection 13 1 5 1 Fixed Overload 13 1 5 2 Variable Overload 13 1 6 Metering 14 1 6 1 Metering Ranges 14 1 6 2 IMPORTANT NOTE Metering Connections 14 1 7 Test timer T suffix units only 15 1 7 1 Setting the Test Time 15 1 7 2 Starting the Timer 15 1 7 3 Resetting the Timer 15 1 7 4 Cancelling the Alarm 15 1 7 5 Disabling the Timer 15 1 8 Interlock Circuits 16 1 8 1 Zero Voltage Interlo...

Page 6: ...peration 24 3 MAINTENANCE 25 3 1 Output Control Variable transformers 25 3 2 HV Output Transformer 25 4 ACCESSORIES 26 4 1 Standard Accessories 26 4 2 Optional Accessories 26 5 OVERALL PERFORMANCE SPECIFICATION 27 5 1 Insulation resistance at 1000V DC 27 5 2 Applied voltage test 27 5 3 Accuracy of instruments 27 5 4 H V Transformer 27 5 5 Complete Equipment 27 6 REVISION 29 ...

Page 7: ...monitored external dual channel emergency stop interlock circuit Output for external signal beacons Output for control of automatic earthing mechanism All references to the KV series in this manual refer to the KV30 100 mk2 KV50 100 mk2 KV50 200 mk2 and KV100 100 mk2 and low discharge derivatives unless a specific reference is made to a particular unit NOTE To operate this equipment it will first ...

Page 8: ... with a brush noise filter to prevent noise from the supply and control unit variable transformer being transmitted through to the HV output The partial discharge levels specified for the KV series are shown in the table below Unit Maximum Partial Discharge Brush Noise Filter Supplied KV30 100 Not specified No KV50 100 Not specified No KV50 200 Not specified No KV100 100 Not specified No KV50 200L...

Page 9: ... indicator B kV meter range switch J Supply indicator C Emergency stop button K Supply on off switch D E stop interlock reset button L mA meter range switch E Output control knob M Variable overload trip reset switch F Fixed overload circuit breaker N Variable overload trip level select G HV output off switch and indicator P mA meter The meters shown are for a KV100 100 ...

Page 10: ...ly indicator C Emergency stop button K Supply on off switch D E stop interlock reset button L mA meter range switch E Output control knob M Variable overload trip reset switch F Fixed overload circuit breaker N Variable overload trip level select G HV output off switch and indicator P mA meter Q Test timer R Cancel timer alarm The meters shown are for a KV100 100 T ...

Page 11: ...on using two independent safety contactors connected in series Mechanically linked auxiliary contacts on these devices are used to monitor the status of the main contacts If a condition is detected where either of the contactors remains closed when it is switched off e g due to a welded contact the other contactor will be disabled and the alarm will sound Further operation of the unit will not be ...

Page 12: ...stop or interlock switch is opened or the control unit is switched off with the key switch See the section Optional Accessories for information on a suitable connector 1 3 3 Earthing Mechanism Control Output Connector A also provides a 230V output which may be used to control an automatic earthing mechanism The output will be on whenever the unit is ready to switch on or in operation when the red ...

Page 13: ...2 Variable Overload The variable overload protection system senses current changes in the high voltage circuit The trip level is adjusted by means of a selector switch on the front panel of the control unit The switch allows the level to be adjusted from 10 110 of normal full current in eleven steps The circuit will activate when the load current exceeds that set by the trip level selector switch ...

Page 14: ...e units use moving coil analogue meters 1 6 1 Metering Ranges Unit Voltmeter FSD mA meter FSD X1 X0 5 X1 X0 1 KV30 100 40kV 20kV 120mA 12mA KV50 100 60kV 30kV 120mA 12mA KV50 200 60kV 30kV 240mA 24mA KV100 100 120kV 60kV 120mA 12mA 1 6 2 IMPORTANT NOTE Metering Connections It is essential that the metering lead from the high voltage transformer to the control unit is connected in circuit If this l...

Page 15: ...2 Starting the Timer The timer automatically starts when the HV output is switched on The timer counts down from the pre set value to zero 1 7 3 Resetting the Timer The timer is automatically reset to zero when the HV output is switched off 1 7 4 Cancelling the Alarm The alarm is cancelled by pressing the CANCEL ALARM button or switching off the output If the alarm is cancelled while the output is...

Page 16: ... gate is opened Fig 1 6 shows the general arrangement Fig 1 6 External interlock emergency stop circuit arrangement To ensure the maximum level of safety and to enable fault detection in the external wiring it is essential to use both channels and dual contact switches as shown Upon activation of any of the external switches the output of the Control Unit will switch off and the reset button indic...

Page 17: ...re Screen 2 Screen between primary and secondary windings Note KV30 100 has one screen HV Start Earthy end of secondary HV winding HV Earth Transformer earth terminal 100V Tap 100V tap on secondary winding In normal use the HV earth screen 1 and screen 2 terminals must be linked together kV SUPPLY mA Control Unit HV EARTH HV START SCREEN 2 SCREEN 1 100V tap HV Transformer HV Bushing Figure 1 7 Sec...

Page 18: ... 1 11 1 Control Unit The control unit is housed in aluminium case All controls and metering functions are located on the front panel All power and interconnecting outputs are located on the rear panel 1 11 2 HV Transformer The high voltage transformer is housed in an indoor type sheet steel tank of all welded construction The tank is fitted with an oil drain plug free air breather lifting eyes rat...

Page 19: ... 2001 for further details of suitable test enclosures The test area must also be identified with suitable signs 2 1 1 3 Mains supply The unit must be connected to a suitable supply via an approved and suitably rated mains connector with earth connection Please refer to section 1 1 for the supply requirements for each unit 2 1 1 4 Earthing Particular attention must be made in earthing the equipment...

Page 20: ...ress relief components should be used where required to keep electrical stresses within acceptable limits The KV series are designed to be used with an air insulated output conductor No HV connection lead is supplied with the KV series units 2 1 2 4 High Voltage Output Clearances The high voltage output from the unit is from a bushing and adequate clearances distances between objects through the a...

Page 21: ...ximum voltage Prohibition zone functional clearance KV30 100 30kVac 170mm KV50 100 KV50 200 50kVac 280mm KV100 100 100kVac 560mm Safety clearances from prohibition zones to barriers are shown below These are simplified clearances based on a 1 2m high barrier different arrangements allow this value to be reduced Always check the latest version of EN50191 for clearances applicable to your test area ...

Page 22: ...ial discharge type connect the brush noise filter in the power lead between the control unit and the HV transformer as shown in figure 2 2 Connect a suitable conductor from the high voltage transformer bushing to the test object Please note that an HV connection lead is not supplied with the unit The unit is designed to be used with an air insulated HV connection such as tinned copper wire or copp...

Page 23: ...Series connections KV100 100 shown Note HV connection lead and earth lead not supplied with unit LOCAL EARTH POWER METERING EARTH STICK TEST OBJECT 5 mH 20 A 440 V T R Test Equipment Ltd HF FILTER UNIT BRUSH NOISE FILTER OUTPUT POWER INPUT MAINS SUPPLY Figure 2 2 KV Series Connections for low partial discharge LD units with brush noise filter ...

Page 24: ...rload indicator in variable overload reset switch Interlock E stop reset switch Press the variable overload reset switch to reset the trip Ensure that all external interlocks are closed and the front panel Emergency stop and any external E stops are released Press the interlock E stop reset switch to arm the circuit Set the desired kV meter range and set the variable overload to the desired trip l...

Page 25: ...f wear on a regular basis To gain axis to the variable transformers remove the top cover of the unit secured by four screws two in each side of the case Replacement brushes are available from T R Test Equipment 3 2 HV Output Transformer The HV transformer oil level should checked every time the transformer is used A sample of oil should be taken every 2 years for chemical and electrical analysis T...

Page 26: ...s are provided with the equipment 2 keys for mains ON OFF switch 2 keys for front panel Emergency stop release External interlock connecting plug Bulgin Ref PX0739 P RS Stock No 483 950 5 metre power interconnecting lead 5 metre screened interconnecting lead Earthing stick Operating Maintenance Manual 4 2 Optional Accessories To connect to external signal beacons and or automatic earthing controll...

Page 27: ...y of instruments kV meter DC moving coil rectified AC 2 0 F S D mA meter DC moving coil rectified AC 2 0 F S D Note Equipment with primary voltage metering kV accuracy quoted for no load 5 4 H V Transformer 2 5kV RMS for 1 minute between primary and earth 2 5kV RMS for 1 minute between earthy end of secondary and earth 5 5 Complete Equipment Flash over tests 4 flash overs direct to ground at 100 o...

Page 28: ......

Page 29: ...29 6 REVISION Product KV mk2 Series High Voltage AC Test System File KV100 100 mk2 series manual v5 doc Author I Lake P Clode Issue Date 5 24 06 13 Modified By T Clark Checked By P Cole Date 24 06 13 ...

Page 30: ...30 Drawings 001555 KV100 100 001808 KV30 100T ...

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