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33

Figure 18: Contact-erosion check
mark dot circled in orange (shown
with circuit breaker CLOSED)

Figure 17: Visual position check of the magnetic actuator in OPEN/CLOSED position

101.0

Item

Description

101.0

Magnetic

actuator

101.1

Side plate

101.4

Armature

101.0

101.4

101.4

101.1

101.1

Closed

Open

Guard removed for illustration.

Visual position check of the magnetic
actuator

In the OPEN position of the circuit breaker,
the armature (101.4) is in the lower
position.

Verify visually that the air gap between
bottom edge of the armature (101.4) and
the lower edge of the opening in the side
plate (101.1) is even along the edge.

In the CLOSED position of the circuit
breaker, armature (101.4) is in the upper
position. Check that the armature is in a
secure end (upper) position at the upper
edge of the opening in the side plate
(101.1).

1. Perform the contact-erosion check.

Contact erosion occurs when high fault
currents are interrupted. Determination
of acceptable contact condition is
checked by the visibility of the white
contact-erosion mark shown in Figure
18: Contact-erosion check mark dot
circled in orange (shown with circuit
breaker CLOSED). The white contact-
erosion mark is located on the movable
stem of the vacuum interrupter, near the
plastic guide bushing. The contact-
erosion check procedure is:

a) Be sure the circuit breaker primary

contacts are closed.

b) Observe the white contact-erosion

mark.

Refer to Figure 18: Contact-erosion
check mark dot circled in orange
(shown with circuit breaker CLOSED).
When any part of the white contact-
erosion mark is visible, contact wear
is within acceptable limits. A
mechanic’s mirror is a convenient
means for viewing the contact-
erosion mark on each vacuum
interrupter.

2. Press the Open pushbutton (54.0) after

completing the contact-erosion check.
Visually verify that the circuit breaker
contacts are open.

Electrical control checks

The electrical controls of the circuit breaker
should be checked during inspections to
verify absence of any mechanical damage,
and proper operation of the magnetic
actuator and associated closing and opening
operations.

Unless otherwise noted, all of these tests
are performed without any control power
applied to the circuit breaker.

Check of the wiring and terminals

1. Physically check all of the circuit breaker

wiring for evidence of abrasion, cuts,
burning or mechanical damage.

2. Check all terminals to be certain they are

solidly attached to their respective
device.

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Содержание 3AH35-MA

Страница 1: ...Instruction manual Type 3AH35 MA vacuum circuit breaker magnetic actuator operator module Installation operation maintenance E50001 F710 K378 V6 4A00 www usa siemens com sdv7 ...

Страница 2: ...lls and knowledge related to the installation construction and operation of the equipment and the hazards involved In addition this person has the following qualifications Is trained and authorized to de energize clear ground and tag circuits and equipment in accordance with established safety procedures Is trained in the proper care and use of protective equipment such as rubber gloves hard hat s...

Страница 3: ...he contents of this instruction manual shall not become part of or modify any prior or existing agreement commitment or relationship The sales contract contains the entire obligation of Siemens Industry Inc The warranty contained in the contract between the parties is the sole warranty of Siemens Industry Inc Any statements contained herein do not create new warranties or modify the existing warra...

Страница 4: ...nderstand this instruction manual before using equipment Maintenance should be performed only by qualified personnel The use of unauthorized parts in the repair of the equipment or tampering by unqualified personnel will result in dangerous conditions which will cause death severe injury or equipment damage Follow all safety instructions contained herein Stored energy and high speed moving parts W...

Страница 5: ... installation overhaul repair and maintenance of Siemens equipment processes and systems Contact regional service centers sales offices or the factory for details or telephone Siemens field service at 1 800 347 6659 or 1 919 365 2200 outside the U S For medium voltage customer service issues contact Siemens at 1 800 347 6659 or 1 919 365 2200 outside the U S NOTICE Capacitor discharge plug 105 2 D...

Страница 6: ...inated If the green LED is on open the control power disconnect device in the relay and control compartment 4 Discharge the capacitors 106 2 by unplugging the connector 105 2 from the controller board 105 0 Do not unplug connector 106 3 from the capacitor boards or damage to the capacitor board or the controller board may occur The red LED 106 4 on each of the capacitor boards 106 1 indicates the ...

Страница 7: ... board two or three depending upon rating 106 2 Capacitor 106 3 Connector for each capacitor board 106 4 Red LED capacitor discharge state 54 0 53 0 105 1 60 1 59 0 58 0 60 0 105 0 106 1 106 1 105 2 106 2 106 4 106 3 105 0 105 2 104 0 Figure 2 Operator controls and discharging capacitors As found and vacuum integrity check tests Perform and record the results of both the as found insulation test a...

Страница 8: ...tor charging Note A temporary source of control power and test leads may be required if the control power source has not been connected to the circuit breaker Refer to the specific wiring information and rating label for your circuit breaker to determine the voltage required and the terminal points where the control voltage signal should be applied When control power is connected to the circuit br...

Страница 9: ...st discharge of the capacitors a red LED on each capacitor board will flash indicating that discharge is in process The process is complete when the red LED stops blinking 6 After the fast discharge process is complete plug in the connector 105 2 to the controller board 105 0 Final mechanical inspections without control power 1 Make a final mechanical inspection of the circuit breaker Verify the c...

Страница 10: ...ushbutton black 54 0 Open pushbutton red 58 0 CLOSED OPEN indicator 59 0 Operations counter 105 1 LEDs Red LED indicates error Yellow LED indicates open possible energy sufficient for OPEN operation Green LED indicates ready energy sufficient for OPEN CLOSE OPEN cycle 54 0 105 0 53 0 59 0 58 0 ...

Страница 11: ...or stationary applications such as the type SDV7 MA outdoor distribution circuit breaker The type 3AH35 MA circuit breaker magnetic actuator conforms to the requirements of ANSI IEEE standards including C37 04 C37 06 C37 09 and C37 010 The circuit breaker includes three vacuum interrupters a magnetic actuator operating mechanism necessary electrical controls and an operator housing In a typical in...

Страница 12: ...errupter Interconnecting bus in the circuit breaker enclosure connects these connection pads to the roof bushing terminals Bolting hardware is M12 x 1 75 grade 8 Torque M12 bolts to 52 ft lb 70 Nm Phase barriers if applicable For certain ratings insulating barriers are attached to the circuit breaker and provide suitable electrical insulation between the vacuum interrupter and primary conductors a...

Страница 13: ...uction Each of the circuit breaker poles is fixed to the pole support channel 16 0 by two cast resin insulators The insulators also connect to the fixed and moving end pole heads 20 0 and 40 0 that in turn support the ends of the vacuum interrupter The pole supports are aluminum castings or sheet steel for 15 5 kV and 27 6 kV up to 25 kA Refer to Figure 3 Operator panel controls on page 10 and Fig...

Страница 14: ...net Due to the energy stored in the contact pressure springs 49 0 and the opening spring 64 0 the magnetic actuator s anchor 101 4 is pushed downwards This opening process is supported by the opening spring 64 0 In the OPEN position the opening spring assures that the ambient pressure does not close the contacts in the vacuum interrupters 30 0 Operating mechanism The operating mechanism is compris...

Страница 15: ... Controller board 105 1 LEDs Red LED indicates error energy not sufficient for operation Yellow LED indicates open possible energy sufficient for OPEN position Green LED indicates ready energy sufficient for OPEN CLOSE OPEN cycle 105 2 Connector disconnect to discharge capacitors 105 5 Power supply connector 106 1 Capacitor board 106 3 Connector for each capacitor board 106 4 Red LED capacitor dis...

Страница 16: ...1 on the front panel If the control voltage fails the stored energy is sufficient for one open operation initiated by the operator mounted Open pushbutton 54 0 within five minutes Within five minutes after loss of operator control power the circuit breaker can perform one open operation initiated by a remote command if the remote command is from a wet powered contact Closing There are two differen...

Страница 17: ...nual opening system In detail A the interlock lever 102 3 is shown in the normal position The shaft 102 1 of the manual opening lever is connected by a spring to the interlock lever 102 3 When the manual opening lever is rotated a few degrees electrical opening is disabled by position switch S6 114 0 On further shaft rotation the circuit breaker opens If the shaft is returned to the normal positio...

Страница 18: ...B 64 0 Opening spring 64 3 Lever 101 0 Magnetic actuator 101 1 Side plates 101 2 Permanent magnet 101 3 Coil 101 4 Anchor 113 1 Position switch CLOSED S4 113 2 Position switch OPEN S5 Circuit breaker OPEN Circuit breaker CLOSED 63 0 64 3 48 0 49 0 63 5 62 8 101 2 101 3 113 1 101 0 101 4 101 1 64 0 62 9 63 0 64 3 48 0 49 0 63 5 62 9 101 0 101 1 101 4 62 8 113 1 101 3 64 0 101 2 113 2 113 2 ...

Страница 19: ...ircuit breaker closed No action Capacitors not charged Hand off lever in NORMAL position Magnetic field together with electromagnetic field causes coupling rod to move upward Position switch S4 113 1 closes Circuit breaker closes Opening using manual opening lever Open using manual opening lever Rotation of the manual opening shaft beyond 5 overcomes the attractive force of the permanent magnet Ro...

Страница 20: ...be initiated using pushbutton During this time microcontroller operation is maintained using stored energy from the capacitors Check of actuator position Test capacitor capacity every 7 days Check of capacitor voltage Check of actuator position Check of capacitor voltage Cyclic self test is initiated every 150 ms energy saving mode Internal level 24 V present Internal level 24 V not present Footno...

Страница 21: ... illuminated CLOSED position is reached within 100 ms CLOSED position is not reached within 100 ms Part 4 OPEN command using local pushbutton or external command OPEN command Verification Command duration 10 ms Current actuator position is CLOSED Check of capacitor voltage Circuit breaker opens due to stored energy in contact pressure springs and opening spring moving the magnetic actuator anchor ...

Страница 22: ...n possible status contact ST2 2 OPEN Energy sufficient for OPEN operation Green LED OFF OPEN operation possible Green LED OFF Blocked OPEN position no CLOSE permitted because energy not sufficient for CLOSE OPEN Red LED OFF Yellow LED ON Yellow LED ON Alarm status contact ST2 3 OPEN Red LED OFF Ready status contact ST2 1 OPEN Ready status contact ST2 1 OPEN Open possible status contact ST2 2 CLOSE...

Страница 23: ...5 Controller schematic on page 25 opens when an alarm condition begins Approximately five seconds after all error conditions cease the red LED is turned off and the alarm contact opens If the control voltage fails or is removed the alarm contact closes and remains closed until control power is restored The binary inputs for electrical closing or opening commands from pushbuttons protective relays ...

Страница 24: ...e close trip input power required when high range electronic controller power supply specified and low range binary input commands ST9 1 ST9 2 and ST9 4 ST9 5 Low range binary input commands requires 17 Vac or 17 Vdc 4 Schematics are shown with circuit breaker open Legend 01 C Control switch close remote 01 T Control switch trip remote 08 Power disconnect 08C T Close open power disconnect optional...

Страница 25: ...er OPEN N O Common 160 Vdc 160 Vdc Ground Ground Discharge Discharge Coil Sense coil Magnetic actuator OPEN CLOSED Mechanical lockout Magnetic actuator coil Unused Magnetic actuator coil OPEN position switch CLOSED position switch 24 Vdc 24 Vdc Unused OPEN pushbutton CLOSE pushbutton Sense coil Sense coil CLOSE command CLOSE command OPEN command OPEN command Unused Power supply ...

Страница 26: ...iety of interpretations Because of this you are best served by adjusting maintenance and lubrication intervals based on your experience with the equipment in the actual service environment Regardless of the length of the maintenance and lubrication interval Siemens recommends that circuit breakers should be inspected and exercised annually For the safety of maintenance personnel as well as others ...

Страница 27: ...pment or tampering by unqualified personnel will result in dangerous conditions which will cause death severe injury or equipment damage Follow all safety instructions contained herein Stored energy and high speed moving parts Will result in serious injury Fingers can be crushed by the magnetic actuator Do not remove guard panel Do not operate circuit breaker if guard panel removed Electrostatic d...

Страница 28: ...dures Should further information be desired or should particular problems arise that are not covered sufficiently for the user s purposes the matter should be referred to the local Siemens sales office Checks of the primary power path The primary power path consists of the three vacuum interrupters the three fixed end and three moving end connections to the enclosure bus system These components ar...

Страница 29: ...or mechanism The magnetic actuator operator checks are divided into mechanical and electrical checks for simplicity and better organization This first series of checks determine if the basic mechanism is clean lubricated and operates smoothly The contact erosion check of the vacuum interrupter is also performed during these tasks Maintenance and lubrication Table 3 gives the recommended maintenanc...

Страница 30: ... power is first applied the red LED lights while the capacitors are charging followed by the green LED lights when energy storage is sufficient for circuit breaker operation The red LED is off when the green LED lights If the LEDs do not conform to this sequence check further as follows If the capacitors have been fully discharged for a very long time charging time may be significantly longer than...

Страница 31: ...ct device in the relay and control compartment Fast discharge the capacitors 106 2 by unplugging the connector 105 2 on the capacitor controller board 105 0 Do not unplug connector 106 3 from the capacitor boards or damage to the capacitor board or the controller board may occur 6 After the fast discharge process plug in the connector 105 2 on the controller board 105 0 When the capacitors are cha...

Страница 32: ...ad and understand this instruction manual before using equipment Maintenance should be performed only by qualified personnel The use of unauthorized parts in the repair of the equipment or tampering by unqualified personnel will result in dangerous conditions which will cause death severe injury or equipment damage Follow all safety instructions contained herein Stored energy and high speed moving...

Страница 33: ...rcuit breaker CLOSED The white contact erosion mark is located on the movable stem of the vacuum interrupter near the plastic guide bushing The contact erosion check procedure is a Be sure the circuit breaker primary contacts are closed b Observe the white contact erosion mark Refer to Figure 18 Contact erosion check mark dot circled in orange shown with circuit breaker CLOSED When any part of the...

Страница 34: ...reaker contacts are closed 2 As soon as the circuit breaker has closed the capacitors 106 2 will recharge automatically This charging process is indicated by the LEDs 105 1 on the front panel The capacitors retain sufficient charge for an opening operation while recharging is occurring 3 After a satisfactory close operation is verified operate the circuit breaker electrical open or trip command vi...

Страница 35: ...ched or when the contacts have been eroded beyond allowed limits Vacuum interrupter replacement procedures are detailed in the following maintenance instructions The vacuum interrupter contact life curves refer to Figure 19 Typical vacuum interrupter contact life curves on page 36 are offered as a guide to expected life Vacuum integrity check using mechanical test Before putting the circuit breake...

Страница 36: ...Load graph A vacuum interrupter type VS 25008 Load graph B vacuum interrupter type VS 15052 Load graph C vacuum interrupter types VS 30030 and VS 30041 1 2 5 50 100 10 20 40 A 25 Note Right hand vertical segment of curve is located at the maximum symmetrical interrupting current rating of the circuit breaker as indicated in Table 4 Typical vacuum interrupter contact expected life on page 35 B C ...

Страница 37: ...ld be inside a suitable test barrier equipped with warning lights Vacuum integrity check using dielectric test A high potential test is used to verify the vacuum integrity of the circuit breaker The test is conducted on the circuit breaker with its primary contacts in the open position Vacuum integrity test procedure 1 Observe safety precautions listed in the danger and warning advisories Construc...

Страница 38: ...ation and contact resistance tests As found tests verify the integrity of the circuit breaker insulation system Megger or insulation resistance tests and contact resistance tests conducted on equipment prior to installation provide a basis of future comparison to detect changes in the protection afforded by the insulation system and in the integrity of the current carrying path A permanent record ...

Страница 39: ...ene or carbon tetrachloride These compounds will damage the phenylene ether copolymer material used in the barriers and other insulation on the circuit breaker Current rating A Contact resistance Micro Ohms 1 200 35 2 000 30 2 500 30 3 000 30 Table 6 Maximum contact resistance NOTICE Capacitor discharge plug 105 2 Disconnect control power prior to removing or replacing the capacitor discharge plug...

Страница 40: ...Figure 9 Manual opening mechanism components on page 17 Use a padlock to lock the circuit breaker in the OPEN position Reinstall the operator mechanism housing cover 60 1 Charging capacitors after lengthy de energized state The capacitors used in the capacitor boards item 106 1 in Figure 8 Magnetic actuator operating mechanism on page 15 are of the electrolytic type If an electrolytic capacitor ha...

Страница 41: ...and functional tests on pages 6 9 When it necessary to replace electronic components for example the controller board 105 0 in Figure 21 Controller board replacement or a capacitor board 107 1 in Figure 22 Capacitor board replacement on page 43 it is necessary to provide the circuit breaker serial number as for any parts needed and in addition the MLFB number of the magnetic actuator The MLFB numb...

Страница 42: ...he connector 105 2 from the bottom of the controller board and wait for the red LED on each capacitor board to stop blinking This indicates discharge of the capacitors to a low voltage Do not unplug connector 106 3 from the capacitor boards or damage to the capacitor board or the controller board may occur 4 Unplug the connector 106 3 from the capacitor board 106 1 5 Remove the mounting screws 106...

Страница 43: ... 3 Connector 106 5 Mounting screws 106 3 106 1 106 5 60 0 106 5 105 4 105 2 105 5 106 0 109 2 When work is finished operate circuit breaker and close and open several times and check that all screw connections are tight Refer to Installation checks and functional tests on pages 6 9 If the capacitors have been fully discharged for a very long time charging time may be significantly longer than indi...

Страница 44: ...ide the U S 1 Removing the vacuum interrupter Note Special care needs to be exercised in removal or installation of hardware around the movable contact end of the vacuum interrupter The movable contact uses a metal bellows to maintain the vacuum seal while still permitting motion of the contact along the axis of a vacuum interrupter The bellows is rugged and reliable and is designed to withstand y...

Страница 45: ... bolt 31 2 2 5 Attach struts 28 0 to the fixed end pole head 20 0 replace hardware M10 but do not tighten at this time 2 6 Couple levers 48 6 and drive link 48 9 to the eye bolt 36 3 using the pin supplied Apply retaining clips Appropriate pin is modestly chamfered not to be confused with pin for the insulating coupler 2 7 Align fixed end pole head 20 0 correctly and tighten bolt fastening it to t...

Страница 46: ...36 1 Moving terminal 36 3 Eye bolt or adapter 40 0 Moving end pole head 48 0 Insulating coupler 48 5 Pin 48 6 Angled lever 48 9 Guide link 48 0 48 5 48 9 40 0 36 3 36 1 29 1 29 2 29 3 28 1 30 0 28 0 16 1 31 2 20 0 Note Excessive bending movement exerted while fastening the terminal clamp will damage the vacuum interrupter 2 11 Attach insulating coupler 48 0 and lever 48 6 together using pin 48 5 A...

Страница 47: ...t locking nut to 26 34 ft lb 35 45 Nm 4 After eye bolt is tightened to proper torque repeat all measurement procedures making certain they are in agreement with values indicated in step 3 6 5 Complete all other maintenance procedures Completely reassembled circuit breaker should pass the high potential test before it is ready for service Figure 25 Illustration showing required technique for fasten...

Страница 48: ...15 27 6 25 25 kA 27 6 kV VS 25008 1 200 2 000 13 15 38 0 20 20 kA 38 0 kV VS 30030 1 200 2 000 2 500 18 22 38 0 25 25 kA 38 0 kV VS 30030 1 200 2 000 2 500 18 22 38 0 31 5 31 5 kA 38 0 kV VS 30041 1 200 2 000 2 500 18 22 38 0 40 40 kA 38 0 kV VS 30041 1 200 2 000 2 500 18 22 Table 8 Vacuum interrupter stroke Footnotes 1 The vacuum interrupter type designation is labeled on the vacuum interrupter I...

Страница 49: ...nected correctly Coil circuit connections damaged or incorrect Capacitor board s damaged or connections incorrect 8 If the yellow LED is illuminated temporarily additional time is necessary for capacitors to reach sufficient charge 9 If the yellow LED is illuminated continuously the capacitor board s is damaged or not connected properly 10 If no LEDs are illuminated refer to item 7 11 If the green...

Страница 50: ...or closed Second value is chopped wave impulse withstand applicable only with circuit breaker closed Table 10 Technical ratings Table 11 Control data Type auxiliary switch Continuous current A Control circuit voltage 120 Vac 240 Vac 48 Vdc 125 Vdc 250 Vdc Circuit breaker auxiliary switch 10 Non inductive circuit interrupting capacity in A 10 5 10 9 6 4 8 Inductive circuit interrupting capacity in ...

Страница 51: ...40 40 to 403 Operating mechanism Magnetic actuator Magnetic actuator Magnetic actuator Closing time4 ms 55 55 55 Opening time4 ms 33 33 33 Emergency manual trip externally operable Standard Standard Standard Auxiliary voltages Close trip and protection Space heaters auxiliaries Vac Refer to Table 11 120 240 Refer to Table 11 120 240 Refer to Table 11 120 240 Interrupting medium Vacuum Vacuum Vacuu...

Страница 52: ...rther development of the products The requested performance features are binding only when they are expressly agreed upon in the concluded contract Article No E50001 F710 K378 V6 4A00 Printed in U S A 2016 Siemens Industry Inc Published by Siemens Industry Inc 2016 Siemens Industry Inc 7000 Siemens Road Wendell North Carolina 27591 For more information please contact our Customer Support Center Ph...

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