Quantcast Parallel Operation of Step Regulators

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search

3.3.7 Parallel Operation of Step Regulators. Special adaptations make it possible to operate
step regulators in parallel, however, certain restrictions are imposed by each method. The choice
of a method is dependent upon such factors as circuit impedances, proximity of units, and the
types of equipment being paralleled. This is to prevent off-step operation, which could lead to
excessive circulating current between regulators.
3.3.8 Bypassing Single-Phase Voltage Regulators. In order to provide continuity of service
and to prevent injury to the regulator, special facilities and procedures are necessary for
switching regulators on and off a line. The following are general procedures; individual
manufacturer's instructions should be followed. Disconnecting Regulator. Referring to Figure 3-10 (Bypass Switching
Arrangement for Single-Phase Voltage Regulator), the sequence of operation for disconnecting a
voltage regulator is summarized as follows:
(a) Place regulator control on manual and adjust to neutral position.
(b) Open the control power switch.
(c) Close switch D shorting series winding.
(d) Open switch C and then B.
(e) Open switch A, if used. This switch is required only when terminal S2 - L2 is
not connected to the neutral or ground wire. Connecting Regulator. Referring to Figure 3-10, the sequence of operation for
connecting a voltage regulator is summarized as follows:
(a) Verify that the regulator control switch is in the manual position and that the
regulator is in the neutral position.
(b) Close switch A, if used.
(c) Close switch B and switch C.
(d) Open switch D.
(e) Close the control power switch.
(f) Turn control switch from manual to automatic.


Privacy Statement - Copyright Information. - Contact Us

Integrated Publishing, Inc.