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

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