SIEMENS SGIM-9948C HVR Vacuum Circuit Breaker Instructions

SIEMENS SGIM-9948C HVR Vacuum Circuit Breaker

Product Information
The Vacuum Circuit Breakers (Vehicle) Type 5 HVR 4.16kV is a family of vacuum circuit breakers designed to meet all applicable ANSI, NEMA, and IEEE standards. This equipment is manufactured by Siemens Power Transmission & Distribution, Inc. and is intended for safe and efficient use in vehicles.

Product Usage Instructions

1. Safety Precautions:
   • Warning: Hazardous voltages and high-speed moving parts can cause death, serious injury, or equipment damage.
   • Before performing any maintenance, ensure the equipment is de-energized and grounded.
   • Maintenance should only be performed by qualified personnel.
   • Avoid using unauthorized parts for equipment repair.
   • Follow all safety instructions provided in the user manual.
2. Qualified Person:
   • For the purpose of this manual, a qualified person is defined as someone who is familiar with the installation, construction, or operation of the equipment and the associated hazards.
   • A qualified person should be trained and authorized to de-energize, clear, ground, and tag circuits and equipment.
   • The person should also be trained in the proper care and use of protective equipment such as rubber gloves, hard hat, safety glasses or face shields, flash clothing, etc.
   • Furthermore, the person should be trained in rendering first aid.
3. Summary:

These instructions provide general guidance for the installation, operation, and maintenance of the Vacuum Circuit Breakers. However, they may not cover all details or variations in equipment, nor address every possible contingency. If further information is required or specific problems arise, it is recommended to contact the local sales office or Siemens representative.

1. Signal Words:
   • Danger: Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury. Warning: Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury. Hazardous voltages and high-speed moving parts. Will cause death, serious injury or equipment damage.

De-energize and ground the equipment before maintenance. Maintenance should be performed only by qualified personnel. The use of unauthorized parts should not be used in the repair of the equipment.
Follow all safety instructions contained herein.

IMPORTANT
The information contained herein is general in nature and not intended for specific application purposes. It does not relieve the user of the responsibility to use sound practices in the application, installation, operation, and maintenance of the equipment purchased. Siemens reserves the right to make changes in the specifications shown herein or to make improvements at any time without notice or obligations. Should a conflict arise between the general information contained in this publication and the contents of drawings or supplementary material or both, the latter shall take precedence.

QUALIFIED PERSON
For the purpose of this manual, a qualified person is one who is familiar with the installation, construction or 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 practices.
•  is trained in the proper care and use of protective equipment such as rubber gloves, hard hat, safety glasses or face shields, flash clothing, etc., in accordance with established safety practices.
• is trained in rendering first aid.

SUMMARY
These instructions do not purport to cover all details or variations in equipment, nor to provide for every possible contingency to be met in connection with installation, operation, or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to the local sales office. The 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 Power Transmission & Distribution, Inc. The warranty contained in the contract between the parties is the sole warranty of Siemens Power Transmission & Distribution, Inc. Any statements contained herein do not create new warranties or modify the existing warranty

Introduction

The 5HVR family of vacuum circuit breakers is designed to meet all the applicable ANSI, NEMA, and IEEE standards. Successful application and operation of this equipment depends as much upon proper installation and maintenance by the user as it does upon the careful design and fabrication by Siemens. The purpose of this Instruction Manual is to assist the user in developing safe and efficient procedures for the installation, maintenance, and use of the equipment. Contact the nearest Siemens representative if any additional information is desired Hazardous voltages and high-speed moving parts. Will cause death, serious injury or property damage. Only qualified persons thoroughly familiar with the equipment, instruction manuals and
drawings should install, operate and/or maintain this equipment.

Qualified Person
For the purpose of this manual, a Qualified Person is one who is familiar with the installation, construction, or operation of the equipment and the hazards involved. In addition, this person has the following qualifications:

• Training and authorization to energize, de-energize, clear, ground, and tag circuits and equipment in accordance with established safety practices.
• Training in the proper care and use of protective equipment such as rubber gloves, hard hats, safety glasses, face shields, flash clothing, etc., in accordance with established safety procedures.
• Training in rendering first aid.

Signal Words
The signal words “Danger”, “Warning” and “Caution” used in this manual indicate the degree of hazard that may be encountered by the user. These words are defined as: Danger – Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. Warning – Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.
Caution – indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

Dangerous Procedures

In addition to other procedures described in this manual as dangerous, user personnel must adhere to the following:

1. Always work on de-energized equipment. Always de-energize a breaker, and remove it from the switchgear before performing any tests, maintenance or repair.
2. Always perform maintenance on the breaker after the spring-charged mechanisms are discharged.
3. Always let an interlock device or safety mechanism perform its function without forcing or defeating the device.

Field Service Operation
Siemens can provide competent, well-trained Field Service Representatives to provide technical guidance and advisory assistance for the 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 1-800-241-4453.

Receiving, Handling, and Storage

Introduction
This manual covers the Receiving, Handling, and Storage instructions for vacuum circuit breakers shipped separately from the switchgear. This section of the manual is intended to help the user identify, inspect and protect the circuit breaker prior to its installation.

Receiving Procedure
Make a physical inspection of the shipping container before removing or unpacking the circuit breaker. Check for shipment damage or indications of rough handling by the carrier. Check each item against the manifest to identify any shortages. Accessories such as the manual charging crank, the racking crank, and the split plug jumper (optional) are shipped separately.
Shipping Damage Claims (when applicable) – Follow normal shipment damage procedures, which should include:

1. Check for visible damage upon arrival.
2. Visible damage must be noted on the delivery receipt and acknowledged with the driver’s signature. Notation, “Possible internal damage, subject to inspection” must be on delivery receipt.
3. Notify the Siemens Sales office immediately of any shipment damage
4. Arrange for carrier’s inspection. Do not move the unit from its unloading point.

Handling Procedure

1. Carefully remove the shipping carton from the circuit breaker. Keep the shipping pallet for later use if the breaker is to be stored prior to its installation.
2. Inspect for concealed damage. Notification to carrier must take place within 15 days to assure prompt resolution of claims.
3. Each circuit breaker should be appropriately lifted, using a lifting sling rated for at least 2,000 lbs. The breaker shall be lifted by the Upper “B” phase post insulator.

The palleted circuit breaker can also be moved using a properly rated forklift vehicle. The pallets are designed for movement by a standard forklift vehicle.

Storage Procedure

1. When the breaker will be placed on its pallet for storage, be sure the unit is securely bolted to the pallet and covered with polyethylene film at least 10 mils thick.
2. Indoor Storage – Whenever possible, store the circuit breaker indoors. The storage environment must be clean, dry, and free of such items as construction dust, corrosive atmosphere, mechanical abuse, and rapid temperature variations.
3. Outdoor Storage – Outdoor storage is not recommended. When no other option is available, the circuit breaker must be completely covered and protected from rain, snow, dirt, and all other contaminants.
4. Space Heating – Space heating must be used for both indoor and outdoor storage to prevent condensation and corrosion. When stored outdoors, 250 watts per breaker of space heating is recommended.

Vehicle Description
Vehicle Function and Operational Interlocks Type 5HVR vacuum circuit breakers are comprised of the interrupter/operator module fitted to a vehicle. This interrupter/operator module is an integral arrangement of the operating mechanism, dielectric system, vacuum interrupters, and means of connecting the primary circuit. The vehicle supports the interrupter/operator module, providing mobility and fully coordinated application in ITE-type HV switchgear. This manual should be used jointly with the Circuit Breaker Operator manual, SGIM-9918.

Alignment
All aspects of the circuit breaker structure which impact alignment and interchangeability are checked at the factory. Field adjustment will not normally be required, but variations in existing switchgear may require field adjustment.

Recommended Tools

• Racking Crank: Original circuit breaker racking crank may be used.
• Handle Extension Lever 18-763-151-501

Installing Circuit Breaker Module Into Compartment
The following procedure should be followed when inserting the circuit breaker into the switchboard.

1. Insert the extension handle, then push down to expose the racking shaft end. Remove the extension handle.
2. Move the locking lever to unlock position.
3. Push the breaker to the test position.
4. Move the locking lever to the lock position.
5. To test the breaker, pull the interlock racking release knob.
6. Insert the extension handle, then push it down to expose the racking shaft. Remove the extension handle.
7. Rack to connect position.
8. Pull the interlock racking release knob.
9. The circuit breaker may now be closed and tripped

Maintenance

Introduction and Maintenance Intervals
Periodic inspections and maintenance are essential to obtain safe and reliable operation of the circuit breaker as well as the switchgear. When circuit breakers and/or the switchgear are operated under “Usual Service Conditions”, maintenance and lubrication are recommended at five-year intervals or at the number of operations indicated in Table 2. “Usual” and “Unusual” service conditions for Medium Voltage MetalClad Switchgear are defined in ANSI C37.20.2, section Generally, “usual service conditions” are defined as an environment in which the equipment is not exposed to excessive dust, acid fumes, damaging chemicals, salt air, rapid or frequent changes in temperature, vibration, high humidity, and extremes of temperature. The definition of “usual service conditions” is subject to a variety 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 and switchgear should be inspected and exercised annually. Recommended Maintenance and Lubrication Periodic maintenance and lubrication should include all the tasks shown in Table 1. Recommended procedures for each of the listed tasks are provided in this section of the manual Failure to properly maintain the equipment could result in death, serious injury or product failure, and can prevent the successful functioning of connected apparatus. Instructions should be carefully reviewed, understood, and followed.
The maintenance tasks in Table 1 must be performed regularly

Table 1: Maintenance Tasks

• Checks of the primary power path
• Cleanliness check
• Inspection of primary disconnects
• Electrical control checks
• Wiring and terminals check
• Secondary disconnect check
• Automatic spring charging check
• Electrical close and trip check
• High potential test
• Insulation test
• Inspection and cleaning of insulation
• Functional tests
• Primary disconnect contact cleanliness and lubrication
• Racking mechanism cleanliness and lubrication
• Circuit Breaker Operator tasks as det

The list of tasks in Table 1 does not represent an exhaustive survey of maintenance steps necessary to ensure the safe operation of the equipment. Particular applications may require further procedures. Should further information be desired or should particular problems arise which are not covered sufficiently for the Purchaser’s purposes, the matter should be referred to the local Siemens sales office.

Removing the Circuit Breaker
The following procedure should be followed when removing the circuit breaker from the switchboard.

1. Trip the circuit breaker by means of the control switch on the front of the switchboard.
2. Insert the extension handle, then push down to expose the racking shaft. Remove the extension handle.
3. Rack circuit breaker to test position.
4. Pull the racking release knob, the circuit breaker may now be closed and tripped.
5. To remove the breaker from the cubicle, insert the extension handle, then push it down to expose the racking shaft. Remove the extension handle, and now move the locking lever to the unlock position.
6. The circuit breaker may now be removed from the cubicle.

Interphase Barrier
To remove the interphase barrier, loosen two screws enough to allow them to be pushed down and out of engagement with the front of the interphase barrier. Then, lift the front and rear of the barrier slightly and slide it upward until the barrier is free of the circuit breaker. The interphase barrier must be removed before making adjustments or tests. To remove the interphase barrier, proceed as described under Interphase Barrier in section Maintenance.

Checks of the Primary Power Path
The primary power path consists of the three vacuum interrupters, the three upper, and the three lower primary disconnects. These components are checked for cleanliness and condition (Figure 3). The vacuum interrupters are discussed in the Circuit Breaker Operator Manual SGIM-9918. Inspection of Primary Disconnects and Cleanliness Check Figure 3 is a side view of the HVR Circuit Breaker with the insulating barriers removed to show the vacuum interrupter and the upper and lower primary disconnects. All of these components must be clean and free of dirt or any foreign objects. Use a dry lint-free cloth. For stubborn dirt, use a clean cloth saturated with denatured alcohol. The phase barriers are plates of glass polyester insulating
material attached to the circuit breaker to provide suitable electrical insulation between the vacuum interrupter primary circuits and the housing.

Always re-install the phase barriers carefully to the original location prior to inserting the circuit breaker in the housing. When the contacts are mated with the switchgear’s primary stud assembly, there is forceful contact distributed over a wide area. This maintains a low current flow per individual contact finger. Inspect the contact fingers for any evidence of burning or pitting that would indicate weakness of the contact finger springs. Inspect the primary disconnect arms for physical integrity and absence of mechanical damage. Inspect the flexible connectors that connect the bottom movable contacts of the vacuum interrupters to the lower primary disconnect arms for tightness and the absence of mechanical damage, burning, or pitting. Using a clean cloth saturated with denatured alcohol, clean old lubricant from primary disconnects, and apply Siemens contact lubricant (reference 15-172-791-233) in a very thin layer.

Fastener Check
Inspect all fasteners for tightness. Both lock nuts and retaining rings are used. Replace any fasteners that appear
to have been frequently removed and replaced.

Racking Mechanism

The racking mechanism is to be wiped clean, and a film of Anderol 732 aerosol synthetic fluid grease (reference part number 15-172-816-058) is applied on the shaft surfaces, threads, and nuts.

Electrical Control Checks
Check the Wiring and Terminals

1. Physically check all of the switchgear wirings for evidence of abrasion, cuts, burning, or mechanical damage.
2. Check all terminals to be certain they are solidly attached to their respective device.
3. Electrical Close and Trip Check (Control Power Required) A check of the breaker control circuits is performed while the unit is still connected to the switchgear (Test position or optional plug jumper). This check is made with the breaker energized by control power from the switchgear.

Once the breaker springs are charged, move the switchgear Close/Trip switch to the Close position. There should be both the sound of the breaker closing and an indication that the breaker contacts are closed by the main contact status indicator.
As soon as the breaker has closed, the automatic spring charging process is repeated. After a satisfactory close operation is verified, move the switchgear Close/Trip switch to the Trip position. Verify by both sound and contact position that the contacts
are open. Completion of these checks demonstrates the satisfactory operation of auxiliary switches, internal relays, and solenoids. Checks of the Spring Charging Motors of the spring charging motor are necessary

Table 2. Periodic Maintenance and Lubrication Tasks

Siemens Power
Transmission & Distribution, Inc.
P.O. Box 29503
Raleigh, NC 27626-0503

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