installation, operation and maintenance instructions...

Installation, Operation and Maintenance Instructions

Viper®-S Solid Dielectric Reclosers Three Phase, Vacuum Recloser

GWI 531-1

Rev. 6 May, 2008

Supersedes Rev. 5 dated October,2005

Table of Contents

Section

Page

1. Introduction

2

2. Safety Information & Practices

4

3. Recloser Description

6

4. Installation

7

5. Operation

13

6. Maintenance

29

7. Testing

31

8. Troubleshooting

36

9. Ratings

37

10. Attachments 38

This information is transmitted by G&W Electric Co. and accepted by you subject to the following understanding and agreement: By accepting these instructions and any included drawings you agree that all rights to the drawing and information contained herein, as well as the proprietary and novel features of the subject matter, are reserved by G&W Electric Co. and that devices embodying such features or information derived from these disclosures will not be manufactured by you or disclosed to others without the expressed written consent of G&W Electric Co. These drawings and information contained herein are and remain the property of G&W Electric Co. and are not to be copied, reproduced or disclosed to others without the expressed written consent of G&W Electric Co.

G&W ELECTRIC CO. ©2008 G&W Electric Co.

PRINTED IN U.S.A.

GWI 531-1 Rev. 6

SECTION 1 INTRODUCTION 1.1 General

This document is intended to provide the user with necessary information to properly receive, inspect, test, install and maintain G&W Viper-S solid dielectric reclosers. If after reviewing the information contained herein, you should have any questions, please contact your G&W representative or call our customer service number.

Read these Instructions

Read and understand the contents of this document and follow all locally approved procedures and safety practices before installing, operating or maintaining this equipment. Be sure to read and understand the Safety Information in Section 2.

Keep these Instructions

This document is a permanent part of your G&W recloser. Keep it in a safe location where it can be readily available and referred to as necessary.

How to Contact G&W

By Phone: By Fax: E-mail: Mail: Internet:

708-388-5010, Monday through Friday, 8:00 AM to 5:00 PM Central Time 708-388-0755 [email protected] 3500 W. 127th Street, Blue Island, Illinois 60406, USA To find your local G&W Representative visit our Web site: www.gwelec.com

1.2 Qualified Persons

WARNING The equipment covered by this document is intended to be installed, operated and maintained by qualified persons who are trained in the installation, operation and maintenance of electric power distribution equipment along with the associated hazards. A qualified person has been trained and is competent: − To de-energize, clear and tag circuits and equipment in accordance with established safety

procedures − To distinguish between live parts from non-live parts of the equipment − In the proper use of insulated tools, wears protective equipment such as rubber gloves, hard hat,

safety glasses, flash-clothes, etc. in accordance with established safety practices and is trained in the care of such equipment

− Is certified in rendering first aid, especially in the technique of removing a person in contact with a live circuit and in applying cardiopulmonary respiration.

These instructions are intended only for qualified persons and are not intended as a substitute for adequate training and experience in safety procedures for this type of equipment.

1.3 Shipment Inspection

Each recloser is completely assembled, tested, and inspected at the factory. It is in good condition when accepted by the carrier for shipment. Examine the crated equipment carefully for any damage that may have occurred in transit. If damage is found, a claim must be filed at once with the transportation company. Uncrate and remove packing as soon as possible after receiving the equipment. Examine the equipment carefully for any hidden damage that may have occurred in transit and was previously undetected. If damage is found, a claim should be filed at once with the transportation company.

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Batteries in recloser control(s) are shipped with the positive lead disconnected. If required for inspection, the batteries may be reconnected to the control. It is possible that the batteries may discharge during shipment and/or storage and may need to be recharged prior to having the capacity to operate the control and/or the recloser.

1.4 Storage

Reclosers that will not be installed immediately should be suitably stored in a clean, dry location. Make certain reclosers are protected from potential damage. If the batteries in the control are connected during receiving inspection, they should be disconnected by removing the positive lead from the battery pack until such time as the recloser is installed.

1.5 Standards

G&W Viper-S reclosers are designed and tested in accordance with the following standards: ANSI/IEEE C37.60 - 1981 ANSI/IEEE C37.61 - 1973 ANSI C37.85 – 1989 IEC 68-2-30 ANSI 37.90.1 ANSI C62.41

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SECTION 2. SAFETY INFORMATION AND PRECAUTIONS

2.1 Safety Alert Messages

The following is important safety information. For safe installation and operation, be sure to read and understand all danger, warning and caution information. The various types of safety alert messages are described below:

DANGER DANGER - Indicates an imminently hazardous situation which if not avoided, will result in death or serious injury.

WARNING WARNING - Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION CAUTION - Indicates a potentially hazardous situation which if not avoided, may result in minor or moderate injury. May also be used to alert against unsafe practices.

2.2 Following Safety Instructions

Carefully read all safety messages in this manual and on your equipment. Keep safety signs in good condition. Replace missing or damaged safety signs.

Keep your equipment in proper working condition. Unauthorized modifications to the equipment may impair the function and/or safety and effect equipment life.

If you do not understand any part of these safety instructions and need assistance, contact your G&W representative or G&W customer service.

2.3 Replacement Instruction and Labels

Replacement instructions and safety labels are available from G&W. To obtain them, please contact Customer Service.

2.4 X- Radiation Limits

G&W Viper reclosers are designed and tested in accordance with applicable sections of ANSI/IEEE C37.60-1981 and C37.85-1972, which include the following information. Reference the above standards for more detailed information.

The known United States manufacturers of vacuum interrupters initiated a test program during July of 1968 (as a Task Force of the NEMA Switchgear Section) to determine the present levels of X-radiation, if any, being emitted from high-voltage power vacuum interrupters, and to suggest permissible levels of radiation from such interrupters on the basis of their recognized application.

Each manufacturer conducted a series of tests on new vacuum interrupters taken from stock and recorded the X-

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radiation levels, if any, under the following conditions:

1. Dielectric withstand test voltage applied to new interrupters 2. Fault current interruption (where applicable) 3. Load current interruption 4. Dielectric withstand test voltages after fault current interruption 5. Dielectric withstand test voltages after load current interruption

As a result of evaluating the results of the aforementioned tests, the manufacturers concluded that neither the general public nor users will be subjected to harmful X-radiation due to normal application and operation of 15.5kV rated vacuum interrupter devices when applied within their assigned ratings and when the voltage applied across the open contacts of the interrupters is 15.5kV or less.

The manufacturers also concluded that at the permissible user dielectric withstand test voltage of 37.5kV radiation levels are negligible for vacuum interrupters rated 15.5kV. Normal electrical safety precautions will require the user to be at a safe distance from the interrupters which will provide sufficient protection.

Precautions: If distances normally required for electrical safety are maintained, the exposure to test personnel will generally not exceed established dose limits. It is nevertheless recommended that adequate precautions such as shielding or distance be used to protect test personnel against possible higher X-radiation occurrences due, for example, to incorrect contact spacing or to the application of voltages in excess of those specified in column of Table 1.

Table 1 Test Voltage and X-Radiation Limits at One-Meter Distance (Note 1) Maximum X-Radiation Averaged Over an Area Not Greater than 100 cm2 (mR/h)

Rated Max Voltage (kV

RMS) (note 2) (Col 1)

Low-Frequency Insulation Level

Withstand Test (kV RMS) (Col 2)

At Rated Max Voltage (Col 3)

At Low Frequency Insulation Withstand Test

Voltage (Col 4)

15.5

37.5

0.5

15 (Note 3)

Notes: (1) Table 1 will be expanded as additional ratings become available (2) This rating is the maximum line-to-line system voltage on which the vacuum interrupter is normally applied, whether the interrupter is rated on a single-phase or on a three-phase basis, using one interrupter per pole. (3) See Appendix A of ANSI C37.85-1972 for derivation of this value.

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SECTION 3 RECLOSER DESCRIPTION

3.1 General

These instructions provide installation, operating and maintenance instructions for the G&W solid dielectric, three-phase, microprocessor-controlled Viper-S recloser.

3.2 Read This Manual First

Read and understand the contents of this manual and follow all locally approved procedures and safety practices before installing or operating this equipment. The Viper-S recloser designed for use with various Schweitzer Engineering Laboratories controls including the SEL-351R Recloser Control, SEL-651R Recloser Control, and SEL-351S Feed Management Control. Refer to the separate operating and maintenance instructions provided with the control.

3.3 Additional Information

These instructions cannot cover all details or variations in the equipment, procedures, or processes described nor provide directions for meeting every possible contingency during installation, operation, or maintenance. For additional information, contact your G&W representative.

3.4 Description of Operation

G&W’s Viper-S recloser is a three-phase, microprocessor-controlled, vacuum recloser. The recloser can be operated and interrogated through a SCADA system for fault detection and recloser isolation. The recloser is suitable for operation through a temperature range of -40ºC to +65ºC (-40ºF to +150ºF).

Figure 1. Viper-S recloser with horizontal pole mount bracket shown.

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SECTION 4 INSTALLATION

WARNING This equipment is not intended to protect human life. Follow all locally approved pro-cedures and safety practices when installing or operating this equipment. Failure to comply can result in death, severe personal injury and equipment damage.

WARNING Hazardous voltage. Always use a hook stick when working with this equipment. Failure to do so can result in contact with high voltage, which will cause severe injury or death.

When installing the recloser, refer to the applicable recloser mounting instructions. 4.1 Check the data plate ratings.

Make sure the ratings and settings on the recloser data plate are correct for the planned installation. 4.2 Perform high-potential withstand tests.

Prior to installing the Viper recloser, perform high-potential withstand tests. Refer to Section 7.2 for high-potential withstand test procedures.

4.3 Install the recloser.

WARNING Do not lift or handle recloser by the bushings. Doing so may result in damage to the recloser and possible injury or death to personnel.

4.3.1 Lifting recloser Follow all approved safety practices when lifting the equipment. Viper-S reclosers have four lifting eyes

located on the tank (Figure 2). All lifting eyes must be used when lifting. There are also two holes in the top of the bracket if needed. Lift the unit smoothly and do not allow the unit to shift. Use proper equipment to obtain a vertical lift without damaging the unit. See recloser customer drawing for approximate weight and lifting provision details. Viper-S reclosers are shipped palletized (bolted on to a pallet). When moving with a forklift truck, the recloser must remain bolted to the pallet to avoid damage. When ready to mount to the pole, make certain to unbolt the recloser and bracket assembly from the pallet. G&W mounting brackets should always be used.

4.3.2 Mounting to pole The horizontal pole mount bracket is supplied with two mounting holes (Figure 2). Measure the distance

between the holes and drill the pole to the desired position. Position one ½” bolt with flat washer through the top hole and secure with a flat washer, lock washer and nut on the back of the pole such that the front bolt head extends from the pole approximately 3-4 inches. Slowly lift the bracket and recloser assembly and position the top slotted mounting hole of the bracket over the front bolt and washer installed in the pole. Slowly lower the unit such that the top bolt seats itself through the slot on the bracket. Do not remove lifting equipment until the unit is completely secured to the pole. Tighten the top bolt and hardware. Insert the bottom bolt with the same hardware as the top through the bottom hole of the bracket and secure to the pole. Take care when removing the lifting equipment as to not damage the recloser.

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Figure 2. Lifting provision locations and horizontal mounting bracket hole dimensions.

Check that the recloser, in its installed position, is secured and that mountings are adequate to support the weight of the recloser.

WARNING Hazardous voltage. Always use a hook stick when operating this equipment. Failure to do so can result in contact with high voltage, which will cause severe injury or death.

CAUTION Bushings may have sharp edges. Wear protective gloves when handling the unit. Failure to do so can result in personal injury.

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4.4 Ground the recloser.

Make the ground connection to the ground connector. Ground bosses are located on the recloser mechanism enclosure. See customer drawing for boss location(s). See Figure 3 for the required grounding procedures for the Viper recloser. To ensure a good ground connection, the top surface of each boss must be sanded to expose bare metal before making a ground connection. The recloser tank and control must be attached at a common grounding point located at the base of the pole or substation rack.

4.5 Install the control.

Refer to the control installation manual and install the control. Make sure the control cable is connected between the control and the recloser, the control is properly programmed for the planned installation, and the control is grounded.

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Figure 3: Recommended grounding method for Viper-S reclosers.

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CAUTION Follow all locally approved safety practices when lifting and mounting the equipment. Use the lifting lugs provided. Lift the unit smoothly and do not allow the unit to shift. Improper lifting can result in equipment damage.

4.6 Make high-voltage line connections (Figure 4).

Note: Six single phase and one three phase disconnect bypass switches are not required, but are highly recommended as they facilitate switching and isolation. Each cable must be properly terminated. Bushings are not intended to provide strain relief.

Figure 4. Connection diagram shows complete surge protection and illustrates bypass and disconnect switches.

WARNING Do not terminate the overhead conductor directly to the bushing without the use of a separate strain relief device. Failure to use a strain relief may result in damage to the recloser.

4.6.1 Connect high voltage lines to recloser bushing terminals.

4.6.2 Provide surge arrester protection. Surge arrester protection should be provided on both sides of the

recloser.

Refer to Figure 5 for terminal identification of the Viper-S solid dielectric reclosers.

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Figure 5. Terminal identification of Viper-S reclosers.

4.7 Operation Check & Installation Testing

High potential testing on reclosers may be conducted. Refer to Section 7, Testing.

Each unit has been fully tested at the factory in accordance with the appropriate standards. It is highly recommended that a high-voltage test be conducted prior to the final connection of the unit to the

electrical system. Tests should be conducted across each recloser in the open position and between each phase and ground (earth) with the recloser in the closed position.

Each recloser termination must be properly terminated prior to high-voltage testing. See Section 7 for testing levels.

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SECTION 5 OPERATION

5.1 General

Reclosers are assigned ratings by the manufacturer and have been designed and tested using levels established by ANSI and/or IEC standards. Design and production tests are conducted to demonstrate that the equipment will perform within the ratings on the nameplate and customer drawing. See Section 9 for ratings and customer drawing in Section 10. Reclosers are designed to be operated only by Qualified Persons. See Section 1 for qualifications.

WARNING Equipment in service will perform to established ratings only if properly installed, operated and maintained. Power reclosers are characterized by high voltage and high continuous and short circuit currents. It should be installed, operated and maintained by Qualified Personnel. Failure to follow instructions or install operate or maintain the equipment may result in failure of the equipment and serious injury or death.

For further information on operation and maintenance of equipment see ANSI C2 standards.

Reclosers have been designed and evaluated using the levels established by applicable sections of ANSI and IEC Standards, which assure the expected life of the recloser with minimal maintenance. See Section 6 for maintenance recommendations.

WARNING Do not attempt to close into fault in excess of the recloser ratings or to interrupt currents in excess of interrupting ratings. Either may result in damage to the recloser and possible injury or death.

WARNING This equipment is not intended to protect human life. Follow all locally approved pro-cedures and safety practices when installing or operating this equipment. Failure to comply can result in death, severe personal injury and equipment damage.

WARNING Hazardous Voltage. Do not rely on the position indication indicator or the manual open handle. They do not insure that the line has been de-energized. Always establish a visible disconnect. Failure to follow proper safety precautions can result in contact with high voltage and serious injury or death.

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5.2 Electrical Operation

The Viper-S recloser utilizes an interface circuit located in the mechanism enclosure. The electronic interface circuit controls the opening and closing signals to the magnetic actuator. See Figure 7 for connection and wiring diagrams.

IMPORTANT: If the yellow manual OPEN handle remains in the down position, the recloser cannot be closed

5.3 AC Interface

Referencing Figure 6, select the appropriate option and connect the AC power.

Figure 6. Viper-S recloser configuration with AC interface options.

Option 1: Recloser powered through control. Option 2: Recloser powered direct from potential transformer.

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Figure 7. Connection diagram for Viper recloser with AC interface.

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5.4 OPEN/CLOSE Contact Position Indicator


The OPEN/CLOSE contact position indicator consists of a red CLOSED and a green OPEN indicator located on the bottom of the mechanism housing (see Figure 8).

5.5 Hook stick Operation (Manual Open, Electrical Close)

The recloser may be opened manually by using a hook stick to pull down the manual OPEN handle located on the front of the recloser (see Figure 8) approximately 45° below horizontal. This will require a typically pulling force of 50 pounds. The recloser microprocessor control is deactivated until the yellow manual handle is returned to the UP position. To close the recloser, first push the yellow manual open handle up to the horizontal position. Then close the recloser using the microprocessor control.

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Figure 8. Viper-S recloser components. Operating handle shown in lockout position.

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5.6 Dead-line Operation and Remote Status Option (if included) AC and DC Interface. Available only with SEL 351R. This optional feature requires the addition of a 6-pin cable and permits the following capabilities: 1) Dead line operation:

The DC/DC converter that is housed within the Viper-S mechanism housing is connected to the 24VDC batteries via one of the 351R output ports. In order for the dead line operation feature to operate properly, the following setting has been programmed by G&W into the SEL 351R: • The designated output port is programmed at the factory to turn ON when AC is lost and to turn OFF when

the AC is present. • The default factory program line is: OUT107 = DISCHG * !DISTST • Any output port of the 351R controller can be assigned for use with the dead line operation feature. In

order to designate a different output port for use with this feature, the conductor on the terminal block of the 351R must be moved from Output 107 to the desired output location. In order to reassign the output within the 351R, the following programming line should be used: OUTXXX = DISCHG * !DISTST (where XXX refers to the output destination. i.e., 107).

• If new settings are uploaded to the control after leaving the factory, the program line above must be re-entered manually.

For devices shipped prior to the effective date of these instructions, the factory assigned output port used may vary, or in some cases, no output port was used. For these devices, the output port may be reassigned by the user by following the above steps.

2) AC/DC Power Supply Status:

Monitors the status of the output of the interrupter power supply and randomly displays it’s status at the control. Reference Figure 10 for remote monitoring connection location.


Figure 9. Viper-S recloser configuration with AC/DC interface options.

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Figure 10. Connection diagram for Viper-S recloser with dead-line operation

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5.7 Voltage Sensing Bushings (if included)

Available only with SEL 651R This optional feature requires a SEL 651R Recloser control and a 19 pin connector.

The Viper-S can be equipped with internal voltage screens for voltage sensing. The voltage sensors provide voltage measurement to the SEL 651R control. Each Viper-S and 651R control is pretested and calibrated at the factory prior to shipment. Three ratio correction factors are determined, as a result of the calibration, and programmed into the control. Refer to the 651R Operations Manual for Ratio Correction setting information.

Ratio Correction Factor values for each recloser are printed on two labels and supplied with the recloser and control. One label is located on the inside of the SEL 651R enclosure front door while the other can be found on the inside surface of the lid of the Viper-S mechanism enclosure.


Figure 11: Viper recloser configuration with AC/DC interface options.

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Figure 12: Connection diagram for Viper-S recloser with Voltage Sensing Bushings

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5.8 The DC Power Option requires the utilization of DC power systems 48-125VDC. 5.8.1 The following are the required specifications when utilizing 48V DC Power Systems

• Operation Voltage range of DC/DC converter is 36VDC – 76VDC. There is no voltage transient protection in front of the DC/DC converter.

CAUTION Battery voltage exceeding 200VDC can damage the DC/DC converter. This can damage the switch and/or leave it inoperative. Make certain 68VDC battery voltage does not exceed 180VDC.

Capacitor charging time after opening operation is approximately 200ms. First reclose interval should be

greater than 300ms. Capacitor charging time after closing operation is approximately 450ms. The second, third and fourth

reclose intervals should be greater than 650ms. 5.8.2 The following are the required specifications when utilizing 125V DC Power Systems

Operation Voltage range of DC/DC converter is 100VDC – 200VDC. There is no voltage transient protection in front of the DC/DC converter.

CAUTION CAUTION – Battery voltage exceeding 200VDC can damage the DC/DC converter. This can damage the switch and/or leave it inoperative. Make certain battery voltage does not exceed 180VDC.

Capacitor charging time after opening operation is approximately 200ms. First reclose interval should be

greater than 300ms. Capacitor charging time after closing operation is approximately 450ms. The second, third and fourth

reclose intervals should be greater than 650ms.

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5.8.3 DC Power Interface

• Reference Figure 13 for typical DC power, Control Cable and AC (for Heaters) cable connections. • Reference Figure 14a for typical interface connections with AC heater. • Reference Figure 14b for typical interface connections with DC heater.

Figure 13. Viper-S recloser configurations with DC interface option.

CAUTION CAUTION – Incorrect polarity can damage the DC/DC converter. This can damage the switch and/or leave it inoperative. Make certain to make connections to the proper polarity.

5.8.4 DC Power Requirements DC power supply with AC heater: Figure 14a 500 Watts Peak: One second 50 Watts Nominal DC power supply with DC heater: Figure 14b 600 Watts Peak: One second 100 Watts Nominal

DC Power Connection 48 VDC or 125 VDC 14 pin Control

Cable Connection

2 Pin AC Heater Connection

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Figure 14a. Connection diagram for DC Viper with AC heater

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Figure 14b. Connection diagram for DC Viper with DC heater

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5.9 Changing the Current Transformer Ratio without Voltage Screen 1) Disconnect AC power cable from the interrupter.

2) Remove the bottom of the interrupter mechanism enclosure. 3) Locate the light green CT connection/protection board (Figure 15a). The board is approximately 6” x 8”. The

board is labeled “CONTROL” and has two columns of three, three position female connectors. One column will be labeled “1000” and the other “500”.

4) To change the CT ratio, simply move, one at a time, the three male connectors from the “1000” column to the adjacent female connection point in the “500” column or vice versa (Figure 15b). Be certain the connections are landed properly when moving. NOTE: The control will be required to be re-programmed to recognize the new CT ratio.

5) Replace the bottom panel of the mechanism enclosure. 6) Reconnect AC power cable to the interrupter. 7) Re-program the control to recognize the new CT ratio.

CT Board Figure 15a: CT board location.

Figure 15b: Changing CT connections.

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5.10. Changing Current Transformer ratio With Voltage Screen Technology (if applicable)

1) De-energize the recloser 2) Open the Interrupters using the yellow manual lockout handle. 3) Remove the bottom of the interrupter mechanism enclosure. 4) Locate the three small plastic jumpers in the upper left hand corner of the Junction Board (Figure 16). 5) To change the CT ratio, simply move, one at a time, the small black jumper from the “1000” position to the

adjacent “500” position (Figure 16). Be certain the jumpers are landed properly when moving. NOTE: The control will be required to be re-programmed to recognize the new CT ratio (refer to SEL-651R manual).

6) Replace the bottom panel of the mechanism enclosure. 7) Reconnect AC power cable to the interrupter. 8) Reconnect the control cable to the control. 9) Push all three yellow manual lockout handles up, then push the “Close” button(s) in the control.

5.11 Current Polarity for the CT within the Viper

Jumper location

CT jumpers setting for 1000:1 and 500:1 CT ratio

1000

:1

500:

1

1000

:1

500:

1

1000:1 500:1

CT jumper

Figure 16

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Figure 17. Current Polarity from the Viper-S Recloser Primary to SEL 351R and 651R Recloser Controls Current Inputs

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SECTION 6 MAINTENANCE

6.1 General

The following information is for reference as a general guideline when operating or performing maintenance of Viper-S reclosers. It is difficult to anticipate all possible situations that may occur. Any questions on how to handle a specific situation should be forwarded to the local G&W representative. State and local regulations should always be considered. The G&W Viper-S recloser has been designed with a minimum mechanical life of 10,000 operations. The Viper-S recloser requires routine inspection to check for physical damage and to verify proper operation. No internal maintenance of the mechanism housing is required. However, if the recloser must be opened, personnel should be instructed to take certain precautions. During any internal maintenance, the recloser must be de-energized.

WARNING Failure to place the yellow Manual Open handle in the lower position will allow the recloser to be operated either automatically, manually by use of the microprocessor control, or remotely (if so equipped). Contact with the magnetic actuator and/or linkage during operation may cause personal injury.

The cover is held in place with 10, 1/4"-20 hex head bolts. The cover weighs approximately 16 lbs (7.3 kg). Take care when removing the cover. Keep the gasket surfaces clean and protect the gasket from damage. G&W recommends that the customer take advantage of SEL vacuum bottle contact wear monitoring. Please contact G&W with the Viper-S serial number to obtain data point specific to your vacuum bottle that can be used to program your SEL relay for predictive maintenance and end of life determination of your recloser. Occasional visual inspection of the recloser is recommended and if possible, should be performed periodically. Because these reclosers are applied under widely varying operating and climatic conditions, service intervals are best determined by the user based on actual operating experience.

WARNING Outside Recloser Mechanism Enclosure

- The mechanism may appear to have”hot spots” when scanned with thermal imaging devices due to internal resistance heater. This is normal. Locations of these heated areas are noted in Figure 18 as “Resistance Heater” and “Heater”.

Inside Recloser Mechanism Enclosure - Make certain to avoid contact with other components inside the mechanism

housing. Reference Figure 18. Specifically, do not touch the following: - The resistance heater may be hot. Contact with the heater may cause burns or

personal injury. - The capacitors may maintain a voltage charge up to 55VDC for an extended period

of time i.e. several days. Contact with the capacitor leads may cause a shock, misoperation or damage to the equipment.

- The magnet actuator and linkage contain moving parts. Contact with moving parts if accidentally operated may cause personal injury.

- Circuit boards. Contact with the control or protective circuitry may cause a static discharge and possible damage to the equipment.

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Prior to returning the Manual Open handle to the UP position, secure the bottom mechanism cover and gasket with the bolts and nuts and tighten. When replacing the cover, cross-torque the bolts to 79 in-lbs. To close the recloser, first push the yellow Manual Open handle UP to the horizontal position. Then close the recloser using the microprocessor control.

Figure 18: Bottom view of inside mechanism enclosure

6.2 Finish of Recloser

The recloser paint finish is comprised of a two-part epoxy, gray coating (Munsell No. 5BG7/0.4). Clean using soap and water. Touch up paint is available from the factory.

6.3 Repair and Spare Parts Items such as operating handles, bushings, gaskets, UV guards, etc. are available from the factory if required. To

inquire about spare or repair parts, contact G&W Representative or customer service with the recloser serial number.

6.4 Returning Equipment to Service

6.4.1 Make sure that the line grounding means are removed. 6.4.2 Make certain recloser is in the open position.

6.5 Recloser Control

The only maintainable components in the control are the batteries. Maximum life of the batteries will be achieved if the control is powered continuously allowing the batteries to maintain a full state of charge. Leaving the batteries in a discharged state for extended periods of time will substantially shorten expected battery life. Maximum battery life expectancy is five years. Batteries should be replaced with units having the same amp-hour rating as the original units. Used batteries must be disposed of properly in accordance with applicable environmental regulations. This recloser is used with Schweitzer Engineering Laboratories microprocessor-based recloser controls. Refer to the separate control operation manual.

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SECTION 7 TESTING

7.1 Operations Testing After reclosers are completely installed in accordance with local practices, high voltage testing may be performed

before the recloser is energized. Insure the test equipment is used in accordance with the manufacturer's instructions.

DANGER Do not exceed the Maximum Dielectric Test Levels as shown in Section 7.1.2. Exceeding the test levels can cause flash over. This can lead to a fault in the recloser or test equipment and cause serious personal injury or death.

WARNING Follow these precautions when performing electrical tests: 1. Completely de-energize the recloser and disconnect it from all power sources.

2. Terminate all bushings with an insulated cap or other suitable cable termination capable of withstanding the test voltage.

Failure to observe these precautions can result in flash over, injury and equipment damage.

WARNING The DC withstand capability of reclosers may be reduced due to damage, electrical or mechanical wear. The DC test voltage must not exceed the withstand limits of the recloser. Application of DC voltages greater than the withstand capability of the recloser can result in flash over, injury and equipment damage.

WARNING When it is necessary to test the cables connected to an energized recloser, proper insulation between the power-frequency source and the DC test equipment must be maintained. Follow the recommendations of the manufacturer of the test or fault location equipment.


7.1.1 Check the data plate ratings. Make sure the ratings and settings on the recloser data plate (see Figure 8)

are correct for the planned testing.

7.1.2 Test electrical open and close operation. Close and open the recloser contacts using the microprocessor control. Confirm that the contacts have closed and opened by:

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7.1.2.1 The OPEN/CLOSE contact position indicator, or

7.1.2.2 By continuity check between the recloser terminals,

7.1.3 Test manual open. Pull the yellow manual open handle (see Figure 8) down to open the recloser contacts. Confirm that the contacts have opened by:

7.1.3.1 The OPEN/CLOSE contact position indicator, or. 7.1.3.2 By continuity check between the recloser terminals,

7.1.4. To close the recloser contacts:

7.1.4.1 First, push the yellow manual open handle up.

7.1.4.2 Close the recloser using the microprocessor based control.

7.2 High Potential Withstand Testing


Use the following procedures to perform high potential withstand tests at 75% of the rated low-frequency withstand voltage for 60 seconds. See Table 3 for rated voltages and Figure 17 for test connection diagrams.

GWI 531-1 Rev. 6

Figure 19. Connection diagrams for high potential withstand testing.

7.2.1 Test 1 (Figure 19)

7.2.1.1 Close the recloser contacts.

7.2.1.2 Ground the recloser.

7.2.1.3 Connect terminals C2, B2 and A2 (see Figure 5) together.

7.2.1.4 Apply proper test voltage (see Table 3) to terminals C2, B2 and A2.

7.2.1.5 The recloser should withstand the test voltage for 60 seconds.

GWI 531-1 Rev. 6

7.2.2 Test 2 (Figure 19) 7.2.2.1 Close the recloser contacts.


7.2.2.3 Ground Phase A (terminal C2) and Phase C (terminal A2).

7.2.2.4 Apply proper test voltage to Phase B (terminal B2).

7.2.2.5 The recloser should withstand the test voltage for 60 seconds. 7.2.3 Test 3 (Figure 19)

7.2.3.1 Open the recloser contacts.


7.2.3.3 Connect and ground terminals C1, B1 and A1 (see Figure 5).

7.2.3.4 Connect terminals C2, B2 and A2.

7.2.3.5 Apply proper test voltage to terminals C2, B2 and A2.

7.2.3.6 The recloser should withstand the test voltage for 60 seconds.

7.2.3.7 Reverse the connections, ground terminals C2, B2 and A2.

7.2.3.8 Apply test voltage to terminals C1, B1 and A1 for 60 seconds.

7.2.3.9 The recloser should withstand the test voltage for 60 seconds. 7.3 Withstand Test Results

The high potential withstand tests provide information on the dielectric condition of the recloser and the vacuum integrity of the interrupters. If the recloser passes the closed-contacts tests (Tests 1 and 2), but fails the open-contacts test (Test 3), the cause is likely to be in the interrupter assembly. Retest each phase individually to determine the failed phase or phases. If the recloser does not pass Tests 1, 2, or 3, contact your G&W Electric Co. representative.

GWI 531-1 Rev. 6

Table 3. Viper-S Recloser Withstand Test Voltage - Ratings Information

Recloser Rating

Withstand Rated Voltage

50 Hz

60 Hz

Impulse (BIL)

Power

Frequency

12kV

15.5kV

110kV

50kV

24kV

27kV

125kV

60kV

36kV 38kV 150kV 70kV

7.4 Factory Production Tests

The following tests are performed at the factory as part of the routing production of the recloser:

Circuit Resistance High Voltage Withstand Operating Assurance Tests

GWI 531-1 Rev. 6

SECTION 8 TROUBLESHOOTING

8.1 If the Viper recloser does not perform as described in the OPERATION section of this manual, the following information may assist in troubleshooting.

8.1.1 Unit Will Not Close

8.1.1.1 Make sure the yellow manual open handle is completely up.

8.1.1.2 Check all cables for proper connection.

8.1.1.3 Verify that the control has power.

8.1.1.4 Upon loss of ac power, check battery level.

8.1.1.5 Check ac power supply (potential transformer). 8.2.2 Unit Will Not Open Electrically

8.2.2.1 Check all cables for proper connection.

8.2.2.2 Verify that the control has power.

8.2.3 For a detail trouble shooting guide please contact G&W representative at 708-388-5010.

8.2.3.2 Viper-S Recloser: Explanation of Operation and Troubleshooting Guide.

GWI 531-1 Rev. 6

SECTION 9 RATINGS AND SPECIFICATIONS 9.1 Check Recloser Ratings Prior To Installation The recloser must be applied within its specified ratings. Check data plate ratings and compare with the system characteristics at the point of application, prior to installation. Tables 4, 5, 6, and 7 list the ratings and specifications for the Viper-S recloser.

Table 4. Voltage Ratings (kV) Description

15 kV

27 kV

38 kV

Maximum Voltage

15.5 kV

27 kV

38 kV

Rated Basic Impulse Voltage

110 kV

125 kV

150 kV

Radio Noise Limit (microvolts)

100 @ 9.4 kV

100 @16.4 kV

100 @ 23 kV

Power Frequency Withstand (Dry)

50 kV

60 kV

70 kV

Power Frequency Withstand (Wet)

45 kV

50 kV

60 kV

Table 5. Current Ratings (Amperes)

Description

15 kV

27 kV

38 kV

Rated Continuous Current

800 A

800 A

800 A

Rated 8-hour Overload Current

960 A

960 A

960 A

Short Circuit Current, Symmetrical

12.5 kA

12.5 kA

12.5 kA

Making Current, Asymmetrical Peak

32 kA

32 kA

32 kA

Making Current, Asymmetrical RMS

20 kA

20 kA

20 kA

Table 6. Mechanical Ratings

Description

15 kV

27 kV

38 kV

Mechanical Operations: Close/Open (minimum)

10,000

10,000

10,000

Table 7. Duty Cycle

Percentage of Interrupting Rating

Number of Unit Operations

Minimum Circuit X/R Value

15-20

44

4

45-55

56

8

90-100

16

17

Total

116

Table 8. Resistance

Description

15 kV

27 kV

38 kV

Busing to bushing resistance

0.200 mohm max.

0.200 mohm max.

0.200 mohm max.

GWI 531-1 Rev. 6

SECTION 10 ATTACHMENTS

10.1 Customer Drawing(s) 10.2 Supplemental Instructions

10.2.1 Recloser Control

installation, operation and maintenance instructions...

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