HitachiHVB_Manual_FinalCopy1_28Septv1

Chapter 4 - SF6 Gas System

Figure 4.8. Rupture Disc Assembled to End cover
1- Rupture disc
2- Plate desiccant
3- Bolt BH M8 x 12
4- Quad ring OD 13.375 In
Considerable research has been conducted to arrive at the current O-rings a gaskets for the
proper application. A second precautionary step is to avoid using excess lubrication during
installation of the O-rings and gaskets. Use only a minimum of the proper lubricant.
The proper installation is described in the following:
1. Inspect the parts on which the O-rings or gaskets is to be assembled to be sure no burrs,
sharp edges or foreign materials are present.
2. The two surfaces, between which the O-ring or gasket will be compressed, should be free
of any visible scratches or sharp changes in surface. If it is deemed necessary to repair an
O-ring or gasket surface the imperfection should be blended into the main surface over
a width of approximately one-quarter inch minimum in order to provide a tight gas seal.
This is typically done with a fine emery cloth. Be sure to clean thoroughly to remove any
metal or sandpaper articles.
3. To assemble, place the O-ring or gasket with a minimum force into the groove (DO NOT
OVER STRETCH THE O-RING OR GASKET TO PLACE IT IN THE GROOVE). If stretching was
performed to seat the O-ring or gasket, allow time for it to return to its normal diameter
before closing the opening. O-rings or gaskets should not be twisted. Twisting during

4-14

Chapter 4 - SF6 Gas System

installation will occur with a lack of lubrication and the incorrect ratio of inside diameter
to cross-sectional diameter.

4. Assembly of the parts must be accomplished by straight longitudinal motion. Rotary or
oscillatory motion may cause pinching or cutting of the O-ring or gasket seal.

5. Operate the moving parts by hand to be sure there is no binding.

6. If an O-ring or gasket is being removed from a part for examination, never reuse it. A
new O-ring or gasket must be installed upon removal of the original. Prior to examination
check with Hitachi HVB Inc. for spare O-ring or gasket.

7. Extreme care must be exercised when removing an O-ring or gasket for replacement or
examination. Do not use a metallic instrument (i.e., screwdriver, pin, scale, etc.). The
proper method to remove an external O-ring is to grip the piston or part firmly with one
hand and with the thumb and the first finger of the other hand, exert a compressive
horizontal force to the sides of the O-ring, causing it to bulge out sufficiently so that it
can be removed from the groove. To remove an internal O-ring, a non-metallic
instrument must be used to prevent scarring of the groove and causing leakage.

8. Recommended procedure for lubricating any O-ring or gasket, is to clean it thoroughly
with a clean cloth (no solvents) and cover the O-ring or gasket completely with a thin film
of the prescribed lubricant before assembling it into the groove. Again, avoid over and
under lubricating. Do not apply lubricant directly from the applicator to the gland, groove,
or the installed O-ring or gasket. Excessive grease can cause contamination problems.
Under-lubrication can result in abraded rings, rolling, and increased friction of the sliding
surface. It is very important that the correct lubricant be used on the O-rings or gaskets.
Use of a lubricant, which is not compatible with the O-ring or gasket material, can result
in the deterioration of the O-ring or gasket and leakage at the seal.

9. O-ring or gasket material is Buna-N (black). Hitalube 280 should be used only, for
lubrication.

4.10 SWAGELOK GAS SEAL SYSTEM

HITACHI HVB, Inc. exclusively uses Swagelok connectors and parts in our gas system. Figure
4.6. Shows an example of Compression Fitting.

Figure 4.7. Swagelok Compression Fitting

4-15

Chapter 4 - SF6 Gas System

4.11 RUPTURE DISK (Option)

The rupture disks are located on the end covers (Figure 4.6) of the tanks, opposite the
mechanism. The rupture disk is a reverse buckling style. This is the state of the art in rupture
disk technology available today. The rupture disk is rated to burst at the MAWP (Maximum
Allowable Working Pressure) of the gas tank. The rupture disk is made of Inconel, this is a
grade of steel with the corrosion resistance of stainless.

Safety glasses must be worn when working near the rupture disk. If the disk were to burst,
the entire gas pressure of the GCB will burst from the tank in a matter of moments. The force
of the blast and the temperature of the gas would be dangerous and could cause serious
injury. To avoid this, a flow diverter is installed in front of rupture disk and it will direct the
gas flow to a safe direction.

Occasionally it may be necessary to inspect the rupture disk. To inspect remove the flow
diverter and examine the disk. The disk should bulge into the tank and be very smooth and
symmetrical. Any irregularities or cracks imply that the disk must be replaced, inspect the
ends of the pressed in lines carefully for irregularities. Again what you are looking for, are
irregularities from a symmetrical shape.

The rupture disk is not a serviceable item. In the unlikely event that the rupture disk opens
please order a new one from HVB spare parts and replace it.

Figure 4.8. Rupture Disk Assembled to End Cover

1- Rupture disc
2- Plate desiccant
3- Bolt BH M8 x 12
4- Quad ring OD 13.375 In

4-16

Chapter 4 - SF6 Gas System

4.11.1 RUPTURE DISK REPLACEMENT
To replace the rupture disk:

1. Completely remove the SF6 gas.
2. Remove the flow diverter.
3. Remove the rupture disk, (a 13 mm socket wrench is required).
4. Clean and inspect the O-ring groove.
5. Install a new O-ring, (lubricate it according to the procedure).
6. Carefully install the rupture disk (be sure that it is centered over the opening in the

gas tank).
7. Install the flow diverter (be sure the openings of flow diverter are oriented

horizontally).Torque all the M8 bolts to 10 ft.-lbs.
8. Remove the end cover bolts (24 mm socket wrench).
9. Take the end cover and place it on a clean surface.
10. Remove the desiccant plate bolts (5mm hexagon wrench).
11. Replace the desiccant bags by new ones then install the desiccant plate. Torque the

M8 bolts to 10 ft.-lbs.
12. Clean and inspect the O-ring groove and the sealing surface of the gas tank.
13. Install a new O-ring, lubricate it according to the procedure.
14. Install the end cover to gas tank. Torque the M16 bolts to 45 ft.-lbs.

4.12 CRANKBOX ROTATING O-RING SEALS

The crank box shafts are sealed by rotating O-rings, located as shown in Figure 4.8. Also this
figure describes the part# and the quantity of O-rings/Breaker.

4-17

Chapter 4 - SF6 Gas System

Figure 4.9. Crank box O-rings

Dust Seal (Dust & SF6) Shaft

Figure 4.10. O – Ring Seals

4-18

Chapter 5 - Maintenance

Chapter 5 MAINTENANCE

5.1 SAFETY NOTE

Each user is responsible for instructing all personnel associated with his equipment on all
safety precautions that must be observed. See the section on safety located in the installation
manual

5.2 REPLACEMENT PARTS

This manual does not include a replacement parts section. For replacement parts please see
the spare parts catalog. When parts are required the serial number of the breaker, the part
number, and the description should be given on the purchase order.

5.3 GENERAL NOTES

Dependable service and safety of power equipment is contingent upon the unfailing
performance of the power circuit breaker. To maintain such service, it is recommended that
a well-defined inspection and maintenance schedule be set up and followed, as serious
shutdowns can often be avoided by locating potential sources of trouble in an early stage. A
periodic lubrication of parts subject to wear is also vitally important for the successful
operation of the breaker and operating mechanism.
The frequency of periodic inspection should be determined by each operating company on
the basis of the number of operations (including switching), magnitude of currents
interrupted, and any unusual operations that occasionally occur. Operating experience will
soon establish a maintenance schedule that will give assurance of proper breaker condition.
Schedule periods may be shortened or lengthened after the customer determines the
condition of the breaker during the first few maintenance checks.
The following recommendations to be observed during either a routine or periodic inspection.

1. Review the SAFETY SECTION at the front of the book. Note items that will be involved
during intended inspection.

2. Be sure the breaker and its mechanism are disconnected from all electrical power,
both high voltage and operating controls, before inspecting or repairing.

3. Apply ground leads to all entrance bushings.
4. Use the connection diagram accompanying the breaker in all cases when testing and

connecting the controls.
5. Before any work is attempted on the operating mechanism, ALL of the springs

(Opening and Closing) must be discharged.
6. After making any adjustments on the breaker, operate the apparatus by hand before

attempting electrical operations.
7. When the breaker interrupter is to be inspected, the SF6 gas should be removed with

proper gas handling equipment.

5-1

Chapter 5 - Maintenance

5.4 INSPECTION AND MAINTENANCE SCHEDULE

It is assumed that the safety instructions have been reviewed and fully understood before any
detail maintenance is attempted. The detail instructions will include only safety notes that
may apply to the part being discussed.

The HITACHI HVB, Inc. gas circuit breaker has been designed for simplicity and minimum
maintenance requirements. It is expected, due to the low number of yearly operations of high
voltage breakers, that the time factor and not number of operations or interruption duty will
normally determine the maintenance schedules.

The inspection and maintenance can be separated into three types: Patrolling, Routine and
Periodic (Table 5.1). See the installation chapter for the tool list required for inspections and
maintenance.

Assemblies Installation Patrolling Routine periodic

Monthly 3Y or 500 12Y or 2000
Operations Operation

SF6 X XX

Compensate
Pressure Gauge

Compensate X XX
Pressure Switch + X XX
Regular Pressure
Gauge

Gas Piping

Moisture Level X XX

Mechanical X XX
Timing Tests

External Stroke X XX

Operational tests X XX
Electrical

Contact Resistance X XX

Insulation X XX
Bushings

Dirt XX X

Damage XX X

Cabinet

Wiring Secure XX X

5-2

Chapter 5 - Maintenance

Aux. Sw. Links XX X
secure
XX X
Fuse Blocks, XX X
Switches Secure XX X
XX X
Relay Contacts
XX X
Heaters Energized
XX X
Heaters XX X
Thermostat
XX X
Motor Gear Train XX X
and Mech. Links XX X

Unusual XX X
Noise X X
X
SF6 Gas X
Electrical Noise X X
Record X X
X
Mechanism X
Counter X X
X X
Gas Pressure X X
X
Ambient Temp. X
X
Dashpot
5-3
Oil Leak

Oil Level

Oil Replacement

Aux. Switch

Links

Wiring Secure

Counter

Mechanism

Close, Trip, Latches

Charging System

Coils Resistance
Mech./Crankshaft
Connection
Touch up
Paint

Chapter 5 - Maintenance

And Caulk

Interrupter

Arcing Contacts X
X
PTFE Nozzles and X
PTFE Covers

Crank box Replacement
Dust Seals

Table 5.1. Inspections and Maintenance Schedule

5.4.1 ROUTINE INSPECTION AND MAINTENANCE

5.4.1.1 General

Interval: 500 operations or 3 years interval whichever comes first.

During this inspection are checked: the electrical current path, the SF6 gas system, the control
relays and the mechanism.

The Routine Inspection is done under following conditions:

1) Breaker removed from service

2) SF6 gas NOT removed

3) Breaker in open position and ALL springs discharged

4) If any of the inspections indicate the GCB is not to specifications refer to either the
Periodic Maintenance Section or the specific section that covers the out of specification
item

5.4.1.2 Routine Inspection and Maintenance Details
1) All patrolling items
2) Contact resistance measurement
3) Insulation resistance check
4) Check gas pressure devices
5) Check all gas piping for tightness or leaks
6) SF6 gas moisture check. Performed on a new breaker or periodic inspection refill

a) Moisture should be under 150 ppm, by volume
b) Check after 24 hours. If moisture is under 300 ppm but greater than 150 ppm, proceed

to next step
c) Check at one week. If under 150 ppm proceed. If above 150 ppm remove gas for

drying and replace desiccant

5-4

Chapter 5 - Maintenance

d) Check moisture at one month - if satisfactory omit checks until routine inspection

7) Check Dashpot for oil leak and oil level
a) Check oil level by taking out the bolt located at the up end of Dashpot. The oil level should
be at lower side of the bolt hole.

8) Check Auxiliary Switch
a) Check the linkage from the output crank to the auxiliary switch linkage. Be sure all
screws, nuts, cotter pins and retaining rings are in place and tight. If any need to be
tightened use red Loctite 271 to secure the fasteners.
b) Check all wires to auxiliary switch for tightness.
c) Check that the counter functions properly.

9) Check and lubricate (apply a small amount of Gleitmo 805 K) the Mechanism
NOTE

There is no adjustment in the Mechanism. During breaker duty time, if any
mechanism malfunction observed, contact immediately HITACHI HVB, Inc.

a) Lubricate close and trip latches (Figure 5.2) and check cotter pins and retaining rings
i) Check the free motion of the latch shafts ensure that the spring return is working
ii) Check the free rotation of the latch rollers also look for damage to the rollers

b) Check charging system. Operate breaker several times by opening and closing the
interrupter using the push buttons. Observe the operation of the motor and gear train
system. Check the following conditions:
i) Motor is securely mounted
ii) Gear train is running smoothly
iii) Inspect the gap between the pawls and the gear. There should always be a
minimum gap of 1 mm after the motor stops
iv) Time the charging operation; a second hand on a wristwatch is adequate. Ensure
that the charging cycle completes in 15 seconds or less. If the motor stops before
complete charging cycle, open and close the motor circuit by control power
breakers/fuse blocks/knife switches, to reset the motor overrun relay.
v) Lubricate the gears

c) Measure the resistance of the Trip and Close Coils, (125 VDC; 12.35% ohms, at 68 F)
d) Check the lock nuts for the mechanism rod connected to crankshaft. If any of these

nuts are loose the linkage must be readjusted and the timing must be rechecked. The
Red Loctite 271 should be used to secure the fasteners.

5-5

Chapter 5 - Maintenance

10) Mechanical Tests
a) Timing Test (Operating curves) - Appendix 2. Can be observed the over travel value at
closing operation.
b) External stroke. When power-operating curves cannot be obtained then a mechanical
stroke test should be made using the manual screw at the end of open spring housing.
c) Operational test. When all other work is completed a close, open and trip-free check
curves should be taken at normal pressure and voltage.

11) Touch up paint and caulk as found necessary.
Routine inspection may also indicate the necessity of an internal inspection if:

 The contact resistance is high or inconsistent between phases.
 Insulator resistance low.
 Contact parting times out of tolerance as indicated by operating curves. Assuming routine

inspections are stable and interruption duty is light, the interruption inspection as
determined by these facts may well exceed 20 years. It is therefore recommended that at
least one breaker in a yard be inspected at the first 12 year periodic maintenance to verify
the interrupter is stable. The customer can then adjust the interrupter inspection period
as indicated by this inspection.
5.4.1.3 Patrolling Inspection and Maintenance Details
1. Interval one week to one month, as best suits the customer’s conditions, but should

be regular.
2. Visual inspection for unusual conditions.

a. Entrance Bushings
i. Excessive dirt
ii. External damage

b. Cabinet
i. All wiring appears secured
ii. Drive links to auxiliary switch
iii. All fuse blocks or switches appear tight or normal.
iv. Relay contacts show no excessive arcing
v. The 160-watt heaters (located on the upper left side of cabinet) should
be energized at all time, depending on customer requirement
vi. Check the settings of the thermostat heaters

vii. Inspect motor gear train and mechanism links. To do this a mirror will
be helpful.

c. External
i. Inspect Dashpot for oil leaks.

5-6

Chapter 5 - Maintenance
d. Unusual Noise

i. SF6 gas system, leaks
ii. Electrical noise in entrance bushing area or internal to the gas tanks.
e. Record
i. Mechanism counter
ii. Gas pressure. If the pressure is 5 psig below normal, check for leaks at

a planned outage or next routine maintenance. For patrolling
inspection it is suggested the plus or minus error, at normal pressure,
be marked on the face with a marking pencil.
iii. Ambient temperature
f. Dashpot
i. Inspect for Oil Leak

Lock Nut (Mechanism Rod Wipe
Adjuster)

Figure 5.2. Inspection

5-7

Chapter 5 - Maintenance

Figure 5.3. Mechanism’s Latches

5.4.2 PERIODIC INSPECTION AND MAINTENANCE

5.4.2.1 General

Interval: 10,000 operations or 18 years whichever comes first.

During this inspection and maintenance the operating mechanism will be lubricated. The
interrupter may need to be inspected depending on number of operations. The interrupter
inspection is normally determined by the interruption duty (Table 5.3.)

Current Interrupted Number of Operations
Between Inspections
20,000 to 40,000 Amps
15,000 to 20,000 Amps 10
5,000 to 15,000 Amp 30
Rated Load Current 2,500 Amp 100
2000

Table 5.3. Number of Operations between Inspections

The Periodic Inspection is done under following conditions:
1) Breaker removed from service.
2) SF6 gas removed.
3) Breaker in open position and ALL springs discharged.

5-8

Chapter 5 - Maintenance

4) If any of the inspections indicate the GCB is not to specifications refer to either the
Periodic

(1) Maintenance Section, or the specific section that covers the out of specification item.

5.4.2.1 Periodic Inspection and Maintenance Details
1) All Patrolling Inspections
2) All Routine Inspections
3) Interrupter Inspection, (Figure 2.2)

The Periodic Inspection should proceed as follows:
a) Perform timing tests before the Interrupter Inspection
b) Discharge both closing and opening springs
c) Remove power from the motor circuit by opening control power breakers, fuse blocks

or knife switches
d) Close and open the breaker using the push buttons until all springs are discharged
e) Then remove control power from entire control circuit
f) Remove and store SF6 gas
g) Remove end covers (desiccant covers)
h) Inspect the inside of the tank for white powder and other arc debris. Small fine powder

material is to be expected. Long slivers or whiskers are not acceptable. Contact HVB if
there is any question about the material found.
i) Remove and inspect the arcing contacts: (Based on 5.4.3.1 , Not Mandatory)

 Inspect the surface at end for excessive burning. Remove all high spots with a fine
file. Measure total length and replace if it does not meet the following specs:

NEW - 187 mm MINIMUM -184 mm

 Also replace if difference between peaks and valleys exceeds three mm

 When arcing tip shows almost no damage, inspect moving contacts with a mirror,
through the nozzle. If internal parts look good do not disassemble

 Contact tip may show slight galling. Polish lightly with #400 paper to remove high
spots. This is a current carrying surface and will need to be replaced when
excessive galling is present.

j) Remove and inspect PTFE nozzles and PTFE covers:

 Inspect the tapered entrance of the PTFE nozzle for damage, in the fully closed
position. Black oval marks around the small inside diameter will indicate contact
hitting during operations.

 The slope leading into the diameter may show black marks or slight depressions
due to contact hitting the surface during re-closing operations. Clean and lightly
polish with fine paper to remove black mark, but depressions do not have to be

5-9

Chapter 5 - Maintenance

removed. The internal diameter will also have black rub marks from the contact.
Clean only, do not polish or the life of the nozzle will be reduced.

 Nozzle inside diameter at smallest diameter should be checked. Replace if it
does not meet the following specs:

NEW - 28 mm MAXIMUM - 29 mm

 Check end diameter in PTFE cover. Replace if it does not meet the following specs:

NEW - 26 mm MAXIMUM - 27 mm

k) All parts should be cleaned with 99% isopropyl alcohol only and lint free wipes before
re-assembly

l) Check all other interrupter parts for tightness then clean with 99% isopropyl alcohol
and lint free wipes

m) Install the PTFE nozzles, PTFE covers, arc contacts

n) Contact resistance check per ROUTINE INSPECTION. This may be performed with or
without SF6 gas

o) Add new desiccant to containers and reattach desiccant covers using new “O” rings.
See spare parts book for part number

p) Recharge with SF6 gas per SF6 GAS SYSTEM

q) Check for gas leaks per the INSTALLATION SECTION

r) Final operating curves per ROUTINE INSPECTION.

4) Crank box Dust - Seal Replacement

The rotating O-ring seals should be replaced. Refer to Chapter 4, Figure 4.8, for the
rotating O-ring locations, part# and quantity. No special tools and jigs are required to
replace these O-rings.

5) Dashpot oil Replacement

The oil dashpot and the O-ring seals should be replaced. The HVB approved oil is:

SHELL SPECIAL FLUID, qty. = 2L or 2.1Qt.

The internals parts of the Dashpot are not user serviceable.

Replace gasket for oil port seal.

5-10

Appendix

APPENDIX

APPENDIX 1. TORQUE VALUE CHART

Thread size Steel into steel Steel into Aluminum / copper/ brass

M6 [lbf-ft] [N X cm] [lbf-ft] [N X cm]
M8
M10 5 490 2 294
M12
M16 10 1177 6 784
M20
M24 15 1961 10 1177
M30
M36 35 4413 25 2942
M42
70 9316 45 5884

130 17652 80 10787

300 41188 140 18633

505 68647 275 37265

870 117680 475 64724

1450 196133 795 107873

1

Appendix

APPENDIX 2. OPERATION TRAVEL CURVES

2.1 CLOSE

Manufacturer: HVB BREAKER PERFORMANCE REPORT
TR3100 Version: RE 2.30
Model Number: 145 HS Location:
Serial Number: Circuit: 125 VDC
Instr. Book #: Operator:
Mechanism #:
Mech. Instr. #: Operation Counter:
ID Number:

Test Type: CLOSE Test Plan Name:

Motion Channels 1-3 Transfer Function
1.000 cm. Travel at the contacts is 1.000 cm. Travel at the transducer.

Resistor range selected 300-7K Ohms
Resistor times tabulated if a 200 uS. Resistor state is detected.
Insertion resistor duration times tabulated.

Command Parameters Close Pulse 133.3 ms
Command Currents Close Current 8.94 A pk.

Specifications MECHANICAL MOTION CHANNELS 1-3 Compare
CLOSE OPERATION PASS

Test results 2

Expected 9.700 centimeters Total Travel
Tolerance + 0.150 TRAVEL 1 9.725 centimeters

- 0.150 Over travel
TRAVEL 1 0.310 centimeters
Expected ******* centimeters
Tolerance + ******* Rebound
TRAVEL 1 0.115 centimeters
- *******

Expected ******* centimeters
Tolerance + *******

- *******

Appendix

Contact Wipe

Expected 2.050 centimeters TRAVEL 1 2.160 centimeters PASS
Tolerance + 0.150

- 0.150

OCB CONTACT TIMING - MOTION CHANNELS 1-3
CLOSE OPERATION

Main Contact Closing Time Measured From Test Initiation

Specifications Test results Travel Velocity Compare
Maximum 150.0 mS CONTACT1 84.1 mS. 7.565 cm 1.556 m/s
Minimum ****** CONTACT2 84.1 7.565 1.556
CONTACTS 84.8 7.675 1.587

Delta Main Contact Closing Time Within the Breaker

Specifications Test results Compare
Maximum 4.0 mS Breaker 0.7 mS PASS

CONTACT MONITORING
CLOSE OPERATION

Test results
C1 88.4 mS
C2 31.7

3

Appendix
4

Appendix

2.2 OPEN

BREAKER PERFORMANCE REPORT
TR3100 Version: RE 2.30

Manufacturer: HVB Location:
Circuit: 125 VDC
Model Number: 145 HS Operator:
Serial Number:
Instr. Book #: Operation Counter:
Mechanism #: Test Plan Name:
Mech. Instr. #:
ID Number:

:
Test Type: TRIP

Motion Channels 1-3 Transfer Function
1.000 cm. Travel at the contacts is 1.000 cm. Travel at the transducer.

Resistor range selected 300-7K Ohms
Resistor times tabulated if a 200 uS. Resistor state is detected.
Insertion resistor duration times tabulated.

Command Parameters Trip Pulse 66.6 mS
Command Currents Trip Current 7.76 A pk.

Specifications MECHANICAL MOTION CHANNELS 1-3 Compare
TRIP OPERATION

Test results

Total Travel

Expected 9.700 centimeters TRAVEL 1 9.745 centimeters PASS
Tolerance + 0.150

- 0.150

Over travel

Expected ******* centimeters TRAVEL 1 0.090 centimeters
Tolerance + *******
Rebound
- ******* TRAVEL 1 0.170 centimeters

Expected ******* centimeters
Tolerance + *******

- *******

5

Appendix

OCB CONTACT TIMING - MOTION CHANNELS 1-3
TRIP OPERATION

Main Contact Opening Time Measured From Test Initiation

Specifications Test results Travel Velocity Compare

Maximum 35.0 mS CONTACT1 28.3 mS. 2.920 cm 3.206 m/s
Minimum ****** CONTACT2 27.7 2.730 3.651
CONTACTS 28.2 2.890 3.239

Delta Main Contact Opening Time Within the Breaker

Specifications Test results Compare
Maximum 2.0 mS Breaker 0.6 mS PASS

CONTACT MONITORING
TRIP OPERATION

Test results

C1 25.5 mS
C2 43.9

6

Appendix
7

Appendix

2.3 TRIP FREE BREAKER PERFORMANCE REPORT
TR3100 Version: RE 2.30
Manufacturer: HVB Location:
Model Number: 145 HS Circuit: 125 VDC
Operator:
Serial Number:
Instr. Book #: Operation Counter:
Mechanism #: Test Plan Name:
Mech. Instr. #:
ID Number:

:
Test Type: TRIP - FREE

Motion Channels 1-3 Transfer Function
1.000 cm. Travel at the contacts is 1.000 cm. Travel at the transducer.

Resistor range selected 300-7K Ohms
Resistor times tabulated if a 200 uS. Resistor state is detected.
Insertion resistor duration times tabulated.

Command Parameters Trip Pulse 1600.0 mS. Close Pulse (Standing) 1000.0 mS
Command Currents Close Current 9.02 A pk
Delay 0.0 mS

Trip Current 9.33 A pk.

OCB CONTACT TIMING
TRIP-FREE OPERATION

Trip-Free Dwell Time Within a Phase

Specifications Test results Compare

Maximum ****** mS Phase A 64.6 mS
Minimum ****** Phase B 64.4
Phase C 63.8

Trip-Free Dwell Time Within the Breaker

Specifications Test results Compare
Breaker 64.7 mS

Main Contact Closing Time Measured From Test Initiation

Specifications Test results Travel Velocity Compare

Maximum 334.0 mS CONTACT1 84.2 mS. 7.600 cm 1.587 m/s
Minimum ****** CONTACT2 84.1 7.580 1.587
CONTACTS 84.7 7.675 1.556

8

Appendix

Specifications Delta Main Contact Closing Time Within the Breaker Compare
Maximum ****** mS
Test results
Breaker 0.6 mS

Main Contact Opening Time Measured From Test Initiation

Specifications Test results Travel Velocity Compare
CONTACT1 148.8 mS 6.915 cm 3.937 m/s
Maximum mS CONTACT2 148.5 7.040 4.001
CONTACTS 148.5 7.040 4.001
Minimum

Delta Main Contact Closing Time Within the Breaker

Specifications Test results Compare
Maximum ****** mS Breaker 0.3 mS

9

Appendix
10

Appendix

2.4 RECLOSE BREAKER PERFORMANCE REPORT
TR3100 Version: RE 2.30
Manufacturer: HVB Location:
Model Number: 145 HS Circuit: 125 VDC
Serial Number: Operator:
Instr. Book #:
Mechanism #: Operation Counter:
Mech. Instr. #: Test Plan Name:
ID Number:

:
Test Type: RECLOSE

Motion Channels 1-3 Transfer Function 1.000 cm.
Travel at the contacts is 1.000 cm. Travel at the transducer.

Resistor range selected 300-7K Ohms
Resistor times tabulated if a 200 uS. Resistor state is detected.
Insertion resistor duration times tabulated.

Command Parameters Trip Pulse 66.60 mS Close Pulse (Delay) 1550.0 mS
Command Currents Close Current 8.39 A pk.
Delay 1 50.00 mS

Trip Current 7.76 A pk.

OCB CONTACT TIMING
RECLOSE OPERATION

Reclose Dead Time Within a Phase

Specifications Test results Compare

Maximum ****** mS Phase A 101.4 mS
Minimum ****** Phase B 101.5
Phase C 101.3

Reclose Dead Time Within the Breaker

Specifications Test results Compare

Breaker 101.0 mS

Main Contact Opening Time Measured From Test Initiation

Specifications Test results Travel Velocity Compare
Maximum 35.0 mS CONTACT1 28.3 mS. 2.875 cm 3.492 m/s
Minimum ****** CONTACT2 27.9 2.735 3.746
CONTACTS 28.4 2.910 3.397

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Appendix

Delta Main Contact Opening Time Within the Breaker

Specifications Test results Compare

Maximum 2.0 mS Breaker 0.5 mS PASS

Main Contact Reclosing Time Measured From Test Initiation

Specifications Test results Travel Velocity Compare

Maximum 334.0 mS CONTACT1 129.7 mS. 2.015 cm 1.270 m/s
Minimum ******* CONTACT2 129.4 2.055 1.270
CONTACTS 129.7 2.015 1.270

Delta Main Contact Closing Time Within the Breaker

Specifications Test results Compare

Maximum ****** mS Breaker 0.3 mS

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Appendix
13

Revision History

HISTORY

REVISION 8 ADDED PARAGRAPH 3.2.1. f, page 3-2
REVISION 9
ECO 110029, REMOVED THE OPERATION OF MOTOR CHARGING CIRCUIT
REVISION 10 AND WARNING PARAGRAPHS (PAGES I-III).
REVISION 11
ECO 110121, TEFLON (TRADE MARK) WAS REPLACED BY PTFE

ECO 120043, CHANGED COMPANY NAME TO HITACHI HVB, INC

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HITACHI HVB, Inc.

7250 McGinnis Ferry Road, Suwanee, GA 30024
Telephone: 770-495-1755, Fax: 770-623-9214

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