SIEMENS SEL Hookstick Disconnect Switches Instruction Manual

INSTRUCTION MANUAL
Hookstick disconnect switches
(types SE, SEL, SER, LER, E, EF,
B-1, B-2, EH, EHL, and EHTT)

SEL Hookstick Disconnect Switches

Installation / check-out / maintenance instructions usa.siemens.com/disconnectswitches
Danger
Hazardous voltages and high speed moving parts.
Will cause death, serious injury or property damage.
Always de-energize and ground the equipment before maintenance.
Read 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 that will cause death, severe injury or equipment damage. 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 responsibility to use sound practices in 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 obligation. 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 instruction manual a qualified person is one who has demonstrated skills 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, safety glasses or face shields, flash clothing, etc. in accordance with established safety practices.

• Is trained in rendering first aid.
  Further, a qualified person shall also be familiar with the proper use of special precautionary techniques, personal protective equipment, insulation and shielding materials, and insulated tools and test equipment. Such persons are permitted to work within limited approach of exposed live parts operative at 50 volts or more, and shall, at a minimum, be additionally trained in all of the following:

• The skills and techniques necessary to distinguish exposed energized parts from other parts of electric equipment.

• The skills and techniques necessary to determine the nominal voltage of exposed live parts.

• The approach distances specified in NFPA 70E® and the corresponding voltages to which the qualified person will be exposed.

• The decision-making process necessary to determine the degree and extent of the hazard and the personal protective equipment and job planning necessary to perform the task safely.

Signal words
The signal words “danger,” “warning,” and “caution” used in this instruction 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 which, 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.
Notice (without safety alert symbol) ‒ Indicates a potentially hazardous situation which, if not avoided, may result in property damage.
Field service operation and warranty issues
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 +1 800-347-6659 or +1 423-262-5700 outside the U.S.
For medium voltage customer service issues, contact Siemens at +1 800-347-6659 or +1 423-262-5700 outside the U.S.
Caution
The equipment described by this bulletin must be operated and properly maintained by qualified personnel who are thoroughly trained and who understand any and all hazards that may be involved. This bulletin is not intended to be a substitute for adequate training and experience in safety procedures for the equipment listed.
NOTE: 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 0maintenance. Should further information be desired or should particular problems arise that 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 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 warranty.
A. Inspection of the switches prior to installation:

1. The switches may be packed in either cardboard boxes or crates. Remove the switch from its container and verify the correct switch is being installed by reviewing the data stamped on the switch nameplate.

2. Inspect the switch carefully for shipping damage. Look closely for:
   a. Insulators that are chipped, cracked, etc.
   b. Bent and/or broken hot parts
   c. If the switch requires interrupters:
   • Remove the interrupter from its carton.
   • Check the interrupter for damage: bent, broken, etc.
   • Check the mechanical action of the interrupter by hand.
   d. Check for missing parts such as (if required):
   • Connectors
   • Back plates and hardware
   • Mounting brackets
   B. Installation instructions:
   1. Drill mounting holes located per customer construction standards.
   2. Install the mounting bolts in the holes (mounting bolts are not furnished) and mount the switch.
   NOTE: Be very careful when locating the switch on the crossarm or steel structure and when tightening the mounting bolts. Tighten the bolt until the split washer is flattened.DO NOT TWIST OR BOW THE SWITCH BASE.
   3. Insert the interrupters and twist into the locked position (if required).
   NOTE: Be very careful when handling the switch and interrupter not to damage either assembly.
   C. Operational check-out instructions:
   1. SWITCHES ARE FULLY ADJUSTED AND INSPECTED before they leave the factory.
   There should not be any need to adjust the switch unit.
   2. The following checks should be performed on all switches to verify proper operation of the switches and interrupters (if required). This will be done manually.
   a. Close the switch fully. The latch should overlap the hook by 0.150 (min.) to 0.300 (max) of an inch, and the latch should be below the hook as shown on the right. NOTE: If the switch is not equipped with interrupters, proceed to step 4 below.
   If the switch is equipped with interrupters, make the following checks:
   b. With the switch fully closed and the interrupter cocked (set to trip), the lever should be above the blade end as shown below with no metal-to-metal contact between the interrupter’s lever and the blade end casting.
   c. Slowly open the switch and be sure that the following operations occur: • As the blade opens, the blade end casting should make metal-to-metal contact with the interrupter’s lever before the blade leaves the silver contacts located on the jaw assembly. • As the blade continues to rotate open, the interrupter will trip (fire) thus interrupting the load. The interrupter must trip (fire) while the lever arm is in metal-to-metal contact with the blade end. The interrupter should trip (fire) before the blade end gets within ½” to ¾” of the end of the lever. • Continue to open switch until the interrupter lever has cleared the end of the nylon push bar. Once the lever has cleared the push bar, the lever will spring back slightly. This allows the nylon bumper to engage the lever and push the lever into the cocked (set to trip) position when the switch is being closed. Open the switch fully.

3. Now, close the switch slowly. The following operations and checks should be made:
   a. As the blade rotates closed, the push bar must pick up the lever a minimum of 0.500 of an inch from the end of the lever. b. Continue to close the blade. When the lever is at 90 to the interrupter, the push bar should be a minimum of 0.500 of an inch from the side of the yoke. At no time during the closing of the switch should the push bar touch the connecting rod or yoke. c. Close the switch completely and make sure that the interrupter resets (cocks) for the next opening operation. The switch should be as shown in 2.a. and 2.b. above.
   Proceed to Step 5 below.

4. Fully open and close the switch. The blade should rotate freely once it is clear of the contacts and should close completely as shown in 2.a. above.

5. The switch is now ready for installation of the conductors.
   D. Maintenance
   NOTE: If the switch is not kept in good working order by proper inspection and care, the service life of the switch may be affected and the probability of a failure during operation increases. Frequency of inspections will be a function of atmospheric contamination, frequency of operation, fault current exposure, etc. The user must establish and follow a suitable maintenance program. The following are some suggested items to check, but should not be considered an all inclusive listing:
   1. Periodically operate the switch several times and check for actions described in Section C. Clean and re-lubricate the jaw contacts and the end of the blade with factory approved grease.
   NOTE: NEVER use a non-oxide grease or the type of inhibitor based electrical joint compound designed for solid bolted connections, on either the hinge or jaw contacts.
   If used, the inhibitor will lock-up these moving contacts.
   2. When the switch is being operated, if the blade requires light effort to rotate after it is clear of the interrupter lever, lubricate the hinge with a factory approved lubricant.
   NOTE: Silicone lubricants, heavy oils or greases are NOT recommended.
   3. Check the mechanical of the interrupter action by hand. If the interrupter is stiff:
   a. Clean the push rod with denatured alcohol and re-lubricate the push rod with a factory approved lubricant and operate the interrupter several times by hand.
   b. If the interrupter is still stiff or the push rod has a very heavy coating of corrosion, it is recommended that you replace the interrupter. NOTE: The internal mechanism of the interrupter does not require maintenance. Any attempt to do so may damage the interrupter.
   4. Check for insulators that are cracked, broken, flashed over, etc.
   5. Check for any visual damage to the hot parts, including the interrupter.
   6. Check for loose or missing hardware, especially mounting and terminal pad bolts.
   7. Visually inspect terminal pad area for corrosion and/or overheating.
   NOTE: A thermal vision test of the entire switch installation, if equipment is available, would be preferred in lieu of a visual inspection.
   8. Refer to the latest ANSI C37.35 for additional recommendations. C37.35 is “IEEE guide for the Application, Installation, Operation and Maintenance of High-Voltage Air Disconnecting and Load Interrupter Switches”.

Disposal

Siemens equipment is environmentally friendly product predominantly consisting of recyclable materials. For disposal, some disassembly, separation, and professional services handling may e required.
Materials to be handled include but are not limited to:

• Metals: Should be transferred and recycled as mixed scrap metals.
• Plastics: Plastic containing a recycle symbol should be recycled. Plastic lacking the recycle symbol should be discarded as industrial waste.
• Small electronics, insulated cables, and motors: Should be recycled via electronics scrap disposal companies specialized in separating and sorting as described above.
• Batteries: Should be recycled via a recycling company.

Disposal regulations vary from locality to locality and may be modified over time. Specific regulations and guidelines should be verified at the time of waste processing to ensure that current requirements are being fulfilled. For specific assistance in understanding and applying regional regulations and policies or manufacturer’s recommendations, refer to the local Siemens service representative for additional information.
Warning
Stored energy.
Can cause death, serious injury, or property damage. Mechanisms contain stored energy, which may be released during disassembly.
Wear suitable protection and take appropriate precautions when disconnecting and removing moving parts.
Warning
Heavy objects.
Can cause death or serious injury.
Disassembly may cause an unbalanced load, and could result in falling objects.
Take appropriate precautions in a properly designated workspace to maxmize support and stability.
Notes………..
This document contains a general description of available technical options only, and its effectiveness will be subject to specific variables including field conditions and project parameters. Siemens does not make representations, warranties, or assurances as to the accuracy or completeness of the content contained herein. Siemens reserves the right to modify the technology and product specifications in its sole discretion without advance notice.

Legal Manufacturer
Siemens Industry, Inc.
7000 Siemens Road
Wendell, North Carolina 27591
United States of America
Telephone: +1 800-347-6659
usa.siemens.com/disconnectswitches
Order No. SIEA-T40001-00-4AUS
© 2024 by Siemens Industry, Inc.

References

• Medium-voltage outdoor distribution products - Siemens USA

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