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Eaton 36W-VAC25, Инструкции по установке, эксплуатации и техническому обслуживанию

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Eaton 36W-VAC25 Скачать руководство пользователя страница 34

I.B. 3A74499B

Page 28

Effective 11/97

6-4  VACUUM INTERRUPTER INTEGRITY TEST

Vacuum interrupters used in Type W-VAC circuit break-
ers are highly reliable interrupting elements.
Satisfactory performance of these devices is dependent
upon the integrity of the vacuum in the interrupter and
the internal dielectric strength.  Both of these parame-
ters can be readily checked by a one minute ac high
potential test.  (See Table 6.1 for appropriate test volt-
age.)  During this test, the following warning must be
observed:

APPLYING ABNORMALLY HIGH VOLTAGE ACROSS
A PAIR OF CONTACTS IN VACUUM MAY PRODUCE
X-RADIATION. THE RADIATION MAY INCREASE
WITH THE INCREASE IN VOLTAGE AND/OR
DECREASE IN CONTACT SPACING. X-RADIATION
PRODUCED DURING THIS TEST WITH RECOM-
MENDED VOLTAGE AND NORMAL CONTACT
SPACING IS EXTREMELY LOW AND WELL BELOW
MAXIMUM PERMITTED BY STANDARDS. HOWEV-
ER, AS A PRECAUTIONARY MEASURE AGAINST
POSSIBILITY OF APPLICATION OF HIGHER THAN
RECOMMENDED VOLTAGE AND/OR BELOW NOR-
MAL CONTACT SPACING, IT IS RECOMMENDED
THAT ALL OPERATING PERSONNEL STAND AT
LEAST ONE METER AWAY IN FRONT OF THE
BREAKER.

With the breaker open and securely sitting on the floor,
connect all top primary studs (bars) together and the
high potential machine lead.  Connect all bottom studs
together and ground them along with the breaker frame.
Start the machine at zero potential, increase to appropri-
ate test voltage and maintain for one minute.

Successful withstand indicates that all interrupters have
satisfactory vacuum level. If there is a breakdown, the
defective interrupter or interrupters should be identified
by an individual test and replaced before placing the
breaker in service.

After the high potential is removed, discharge any elec-
trical charge that may be retained, particularly from the
center shield of vacuum interrupters. To avoid any ambi-
guity in the ac high potential test due to leakage or dis-
placement (capacitive) current, the test unit should have
sufficient volt-ampere capacity. It is recommended that
the equipment be capable of delivering 25 milliamperes
for one minute.

Although an ac high potential test is recommended, a dc
test may be performed if only a dc test unit is available.

In this case the equipment must be capable of delivering
5 milliamperes for one minute to avoid ambiguity due to
field emission or leakage currents and the test voltage
shall be as shown in Table 6.1.

The current delivery capability of 25 ma ac and 5 ma dc
apply when all three VIs are tested in parallel. If individ-
ual VIs are tested, current capability may be one third of
these values.

SOME DC HIGH POTENTIAL UNITS, OPERATING AS
UNFILTERED HALF-WAVE RECTIFIERS, ARE NOT
SUITABLE FOR USE TO TEST VACUUM INTER-
RUPTERS BECAUSE THE PEAK VOLTAGE
APPEARING ACROSS THE INTERRUPTERS CAN BE
SUBSTANTIALLY GREATER THAN THE VALUE
READ ON THE METER.

6-5  CONTACT EROSION AND WIPE

Since the contacts are contained inside the interrupter,
they remain clean and require no maintenance.
However, during high current interruptions there may be
a minimum amount of erosion from the contact surfaces.
Maximum permitted erosion is 3 mm. To determine con-
tact erosion, close the breaker and observe the vacuum
interrupter moving stem from the rear of the breaker. If
the mark on each stem is visible, erosion has not
reached maximum value thus indicating satisfactory con-
tact surface of the interrupter. If the mark is not visible,
the pole unit assembly must be replaced (Figures 6-2
and 6-3).

The adequacy of contact wipe can also be determined
by simply observing the indicator on the drive rod
toward the front of the closed breaker. If the wipe is ade-
quate, the entire vertical portion of the indicator "T" will
be visible along with all or a portion of the horizontal part
of the indicator "T" (Figures 6-4 and 6-5). If none of the
horizontal portion shows with the breaker closed, the
wipe is not adequate, and the pole unit assembly must
be replaced.

!

WARNING

!

WARNING

Breaker Rated 
Maximum Voltage

ac 60 Hz

dc

Up to and including
15.0 kV

27 kV

40 kV

Vacuum Interrupter Integrity Test Voltage

Table 6.1  Test Voltage

Содержание 36W-VAC25

Страница 1: ...1993 Cutler Hammer Instructions for Installation Operation and Maintenance of Type W VAC Vacuum Circuit Breakers W VAC Breaker Element W VAC Breaker with Carriage Assembly for SIngle Tier Switchgear W...

Страница 2: ......

Страница 3: ...LD BE ATTEMPTED ONLY BY QUALIFIED PERSONNEL THIS INSTRUCTION BOOK SHOULD NOT BE CON SIDERED ALL INCLUSIVE REGARDING INSTALLA TION OR MAINTENANCE PROCEDURES IF FUR THER INFORMATION IS REQUIRED YOU SHOU...

Страница 4: ...t Interface Check 13 SECTION 5 DESCRIPTION AND OPERATION 5 1 Interrupter Assembly 16 5 1 1 Vacuum Interrupter 16 5 1 2 Contact Erosion Indicator 17 5 1 3 T Cutout Loading Spring Indicator 17 5 1 4 Con...

Страница 5: ...Warning 25 6 2 Frequency 25 6 3 Inspection and Maintenance Procedures 26 6 4 Vacuum Interrupter Integrity Test 27 6 5 Contact Erosion and Wipe 27 6 6 Insulation 28 6 7 Insulation Integrity Check 28 6...

Страница 6: ...reaker Manual Operation Single Tier Breaker Shown 13 5 1 Flush Mounted Configuration 16 5 2 Behind the Door Configuration 17 5 3 Closeup of Type W VAC Breaker Vacuum Interrupters and Current Carrying...

Страница 7: ...W VAC BREAKERS ARE PROTECTIVE DEVICES AS SUCH THEY ARE MAXIMUM RATED DEVICES THEREFORE THEY SHOULD NOT UNDER ANY CIRCUMSTANCES BE APPLIED OUT SIDE THEIR NAMEPLATE RATINGS WARNING Table 1 1 Type W VAC...

Страница 8: ...he hf 3L h3Le he hf S hS L h W he Y h Y J h U he hf H h V he hf he N he hf 3 hf J he W he V4 L h U he hf N h V he3L hf H h S hf J he W he Y L h U hf N h V he hf H h hf L h X he X hf J h N1 heV H h N...

Страница 9: ...V M 5 7 V H e hf 3L e N V h Xg X h X X h V h V e N1 hS N1 h L Lh7H h X f31 X T5 Xe Xe J5 Xe X h he X e e e e fS5 V Y V eV g U hf e f g f V f V hJ 1 h N1 h H f Y V h7 h J h h 3L f hf h Lhe S J h3 V h 7...

Страница 10: ...not work on a breaker with the secondary test cou pler engaged Failure to disconnect the test coupler could result in an electrical shock leading to death per sonal injury or property damage Do not wo...

Страница 11: ...for any signs of damage or rough handing Open the con tainer carefully to avoid any damage to the contents When opening the container be careful that any loose items or hardware are not discarded with...

Страница 12: ...cks should be made to make sure that the breaker is free from shipping dam age and is in satisfactory operating condition The breaker is shipped with its contacts open and clos ing springs discharged...

Страница 13: ...97 Figure 3 2 Type W VAC breaker element faceplate 1 2 3 8 7 4 5 6 Front Panel Manual Charge Socket Open Closed Indicator Spring Charged Discharged Indicator Operation Counter Rating Nameplate Manual...

Страница 14: ...1 2 3 4 5 L H Closing Spring Anti pump Relay Auxiliary Switch Motor Cutoff Switch Closing Cam Spring Release Close Coil Assembly Shunt Trip Assembly Position Switch Charging Motor Charging Pawl Ratch...

Страница 15: ...4 Rear external view of W VAC breaker element 1 Secondary Disconnect Lifter Yoke Opening Support Insulator Primary Disconnect Vacuum Interrupter Contact Loading Spring Wipe Spring Operating Rod Drive...

Страница 16: ...view W VAC breaker with carriage assembly for single tier switchgear Side View Rear View Mechanism Enclosure Support Insulator Primary Disconnect Levering in Screw Carriage Carriage Wheel Shoot Bolt...

Страница 17: ...VAC breaker with cradle assembly for double tier switchgear Front View Rear View Mechanism Enclosure Support Insulator Primary Disconnect Levering in Screw Cradle Cradle Wheel Shutter Operator Leveri...

Страница 18: ...TACT EROSION AND WIPE Manually charge the closing springs and close the breaker Check contact erosion and wipe as described in Section 6 5 4 6 PRIMARY CIRCUIT RESISTANCE Check the primary circuit resi...

Страница 19: ...Type W VAC breaker manual operation single tier breaker shown a Inserting the maintenance tool into the manual charging socket b Lifting shoot lever permits insertion of levering crank c Manually clos...

Страница 20: ...Anti Close Interlock This interlock prevents releasing the closing springs electrically or manually if the breaker is already closed d Anti Latch Interlock This interlock prevents the breaker from bei...

Страница 21: ...sembly version lift the shoot bolt lever and pull the breaker out The breaker will close and trip as it comes out from the Test position 2 For the double tier configuration cradle assembly version ret...

Страница 22: ...is racked into the fully connected position Possibility 3 The basic breaker element combined with a cradle assembly is used for double tier switchgear This combination is only for use in a behind the...

Страница 23: ...is located on the moving stem of the interrupter Figures 6 2 and 6 3 In order to determine if the contacts have eroded to the extent that the interrupter must be replaced close the breaker and observ...

Страница 24: ...ed to the support molding resulting in the support molding being enclosed on all four vertical sides Figure 5 4 5 2 STORED ENERGY MECHANISM KEEP HANDS AND FINGERS AWAY FROM THE BREAKER S INTERNAL PART...

Страница 25: ...gh the main link to close the breaker In Figure 5 5c the linkage is shown with the breaker in the closed position before the closing springs have been recharged Interference of the trip D shaft with t...

Страница 26: ...T XV X W T h V XV T R Ug N L N R XV U N1g W 3L X V S X Y V I 3 eW R h eV4 UeW g W XfV 7H 0R T T KS5 g 0R R40Y e 6T e W eI Y O g W Yh 0Y 7H hfV L g 3L f Kh V X S 3 O e eV X f he Y e V40Y h3Le S e f e h...

Страница 27: ...e V h g f e e V e e g hf f e e e e f W hf e f Y e e f J5 W2 Y h Xe f fW2 e U heV Me V e hf f g f W g W hO U he f Y f 0Y V g T e f f e eV U O K W V g 0R4 e f Y J5 Y X X V X e f f g J LV f X S Xh e e T...

Страница 28: ...nted male plugs To disengage the sec ondary plugs from the TEST position simply push the carriage to the rear 5 3 3 UNDERVOLTAGE TRIP DEVICE The undervoltage trip device for W VAC breakers is an elect...

Страница 29: ...d by the breaker operating shaft prevents the levering crank from being inserted with the breaker in the Closed position 5 4 3 ANTI CLOSE INTERLOCK This interlock prevents releasing the closing spring...

Страница 30: ...6Xg gW 6K f e W 1 6K f gW2 6Kg g O2 6X W2 6Kg f W2 X W26Kg Lg O2 6X gO2 6X N N X W 6K H 3 X J L W2 5 W2 6X 7 W2 W26X 3 K e f O 5 X f f W H 6X eJ eW 5 6X e Lf O f f O2 1 7 6Xf fW 1 7 6XfJ 1f W2 1 W2 6X...

Страница 31: ...he g V he 3T5 f Y eS 0 Me Hhe X 3T Xh N H g W 7UfV U O he h V e W V X g g U V U he U N R g 3L g N1 S he h X e V h N1 g U he g S g g S1 he Y e W g he h 7H g f 3Lhe g f h 3L hf eV he h 3L X V hf 3T X he...

Страница 32: ...7H 7 L heS5 75 7H V f 3 h X he f N1 e R4 g S S g He hV g O he X f gV g 7H e 5 X e S S g g L e V X U he fO2 f X V h 3L 3Lg he Ke X f e e7He U g W e f h U he S f h f e V Xe 7H 7 heW e 31 1 Le N1 heN1 31...

Страница 33: ...free cloth Primary Disconnects No burning or damage Visual Check Replace if burned damaged or eroded 3 Control Closing and Tripping Device Smooth and correct Test closing and tripping Replace any defe...

Страница 34: ...uld have sufficient volt ampere capacity It is recommended that the equipment be capable of delivering 25 milliamperes for one minute Although an ac high potential test is recommended a dc test may be...

Страница 35: ...55812CA or commercial equivalent Secondary control wiring requires inspection for tightness of all connections and damage to insulation 6 7 INSULATION INTEGRITY CHECK Primary Circuit The integrity of...

Страница 36: ...c These bearings are packed at the factory with a top grade slow oxidizing grease which normally should be effective for many years They should not be disturbed unless there is definite evidence of sl...

Страница 37: ...ood grease solvent Don not use carbon tetracholride They should then be washed in light machine oil until the cleaner is removed After the oil has been drawn off the bearings should be packed with Cut...

Страница 38: ...itch off Secondary Disconnects Motor Cut off Switch Poor or burned contacts Lever not operational Terminals and connectors Poor or burned contacts Motor Brushes worn or commutator segment open Mechani...

Страница 39: ...ch or trip bar not reset Auxiliary Switch b contact open or burned Motor Cut off Contacts open or burned Trip Coil Assembly Clapper fails to reset Pole Shaft Not open fully Trip Latch Reset Spring Dam...

Страница 40: ...en Terminals and Connections Poor or burned or open Trip Mechanism Trip Clapper Jammed Trip Bar Trip Latch Jammed Trip Sound Trip Mechanism Pole Shaft Jammed Operating Rod Assembly Broken or pins out...

Страница 41: ...and con tinuity requirements Each customer should develop his own stock level based on operating experience Refer to Table 7 1 for guidance 7 2 ORDERING INSTRUCTIONS a Always specify the breaker rati...

Страница 42: ...W M I MI Y hg Y X hf h 31 hf g V hf 3 6T KO2 W26Xhe S 40R4 U 0R X h 6T T W Yf B 9e h X S U 7U T K C MB hf V4 0R R N U H f g U S 6T T2 h J R MI R R he Y V Yh g h hf h hf h hf h hf h hf h h h e f h M h...

Страница 43: ...125 VAC Cap trip 3759A76G02 1 220 250 VDC 220 250 VAC Cap trip 3759A76G03 1 15 UV Trip Coils 48 VDC 8067A19G01 1 110 125 VDC 8067A19G02 1 220 250 VDC 8067A19G03 1 16 Motor Cut Off Switch 5677B02G01 1...

Страница 44: ...ard 691C662G01 1 UV 691C666G01 1 21 Trip Latch Hatchet 699B040G01 1 22 Cluster Assembly 630A 699B104G01 1 800 1250A 508B022G01 1 1600 2000A 5677B328G01 1 23 Shock Absorber 5677B26H01 1 W f hf e h 6K W...

Страница 45: ...I B 3A74499B Page 39 Effective 11 97...

Страница 46: ...I B 3A74499B Page 40 Effective 11 97...

Страница 47: ...I B 3A74499B Page 41 Effective 11 97...

Страница 48: ...e contract between the purchaser and Cutler Hammer NO WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PAR TICULAR PURPOSE OR MERCHANTABILITY OR WARRANTIES ARISING FROM COURSE OF...

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