Siemens 21-115532-001 manual Removing the Regulator from Service

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REMOVING THE REGULATOR FROM SERVICE

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SWITCHING “OFF LINE”

•Improper by-pass operation will result in explosion and fire hazard. Will cause serious injury, death or equipment damage.

•Do NOT remove from service unless tap-changer is in neutral position AND control panel is properly disabled.

•If the regulator being removed is in a closed delta bank, it is necessary to bypass and isolate all regulators in the bank.

Improper By-Pass operation will result in explosion and fire hazard.

Will cause serious injury, death or equipment damage.

To Prevent:

Do NOT install OR remove from service unless Tap Changer is in neutral position AND Control Panel is properly disabled to prevent tap changes while in By-Pass configuration. Read Operators Manual before attempting to By-Pass this Regulator.

Follow instructions to remove from service:

1.Place the Auto/Manual switch in the By-Pass position

2.Place the Raise/Lower switch in "Off"

3.Make certain regulator is in neutral (N) position. If independent checks of the position indicator and NeutraliteTM indicator do not confirm the neutral position, bypassing must not be attempted. In such event, de- energize the system to remove the regulator from service

4.Turn voltage power source switch to "Off"

5.Remove power fuse

6.After assuring the voltage regulator is on neutral, close the bypass switch

7.Open sequentially, the load and source switches

8.(a) For a single phase or grounded wye connection, make sure that the high voltage disconnect switches are opened

(b) For a closed delta connection, be sure all regulators in the bank are bypassed and isolated

9.Exercise appropriate care in the removal of the regulator. High voltage will still be present at the bypass switch and the source and load switch terminals. Remove the ground connection last.

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Contents Instructions Page Table of Contents Page Introduction Qualified PersonIntroduction Physical Considerations Installation Diagrams Closed DeltaProtective Measures Control ConnectionsConnection Diagrams Inverted Design Ansi Type B Connection Diagrams Placing the Regulator in Service Removing the Regulator from Service Maintenance General Instructions Operational ChecksPeriodic Inspection Special Features Operation AT Less than Rated Voltage VARI-AMPTMRANGE and Current Ratings AvailableForced AIR Cooling Subbase Assembly Parts List Major Components Parts ListType TLG Dial Switch Type TLG Quick Break Mechanism Type TLF Dial Switch Type TLF Quick Break Mechanism Bypass Arresters Bushings Bushings 5400WPR4018-06 PR4018-05 PR4018-04 October

21-115532-001 specifications

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