Minimize circulating current so that is does not cause a relay action.
The step regulator has a bandwidth range of ±3/4 - 2 volts
When the voltage is being raised, the regulator is said to be
When the voltage is being lowered, the regulator is said to
An is a transformer that has only one winding
The line-drop compensator calculates the necessary change in the voltage by simulating the voltage drop in the feeder between the regulator and the load center.
The basic bandwidth used by the DWP is 2 volts
Feeder voltage regulators are connected open-delta
Step type regulators use a mechanism with 9 contacts. These 9
contacts include 8 steps and a neutral
A changes the polarity of the connection between the primary and the secondary
On Induction Regulators, the movable coils are called....
The stationary coil is the stator. The stator is also called the
secondary or output winding. The stator is connected in series with
the circuit to be regulated.
With Induction Regulators, when the rotor is perpendicular to the stator, it cannot induce any in the stator
How many steps on a regulator?
33; 16 up, 16 down, and neutral
Regulators may hunt due to faulty .
Contact making voltmeter
Feeder voltage regulators use a line-drop compensator to simulate the voltage drop to the load center
Voltage regulators need to be blocked on neutral when switching is done on a feeder position
The two types of feeder voltage regulators used by the Department are and
Induction and Step
Induction regulators use a rotor and stator to adjust the voltage
The regulator should show between 1000 and 3000
counter operations for a normal month.
On the basis of the information from the line-drop compensator, the contact-making voltmeter (CMV or CMVM) will raise or lower the voltage, provided that time and bandwidth requirements are met
Electric stoves, irons, heaters, and toasters are examples of or resistance loads.
Vacuum cleaners, washing machines, fans refrigerators, and power tools are examples of .
What are some examples of electronic loads.
Television, computers, and radios
Another name for lighting load is
What are the two major benefits to the Power System in maintaining a regulated voltage supply to our customers.
Customer satisfaction, efficiency
The load center is the point on a feeder where the circuit branches out into various primary circuits.
is the decrease in voltage on an electric circuit between the source and the load.
When an autotransformer is used to the voltage, part of the single winding acts as the primary, and the entire winding acts as the secondary.
When an autotransformer is used to the voltage, the entire winding acts as the primary, part of the winding acts as the secondary.
What are the two types of line-drop compensators?
Balance Beam, Electronic
The basic bandwidth set by DWP is
A hot regulator room will decrease the current carrying capacity of the regulator.
Step type regulator are autotransformers.
In reference to Voltage Regulators, each step causes a change of .
60 volts (1.25% of 4.8kv)
In reference to Voltage Regulators; two finger contacts and preventative autotransformers create a bridging position when each of the fingers is on different contact, resulting in 32 steps - 16 Boost, 16 Buck. Each step has a voltage change of
30 volts (.625% of 4.8kv)
When a rotor is to the sator, it cannot induce any voltage in the stator
The maximum voltage change occurs when the rotor is to the sator.
What are the two main reasons Voltage Regulators may need to blocked on neutral.
When making/breaking feeder parallel, voltage may not match possibly causing an arc.
When making parallel with the TBT, if not blocked on neutral, circulating current can occur possibly causing the Feeder CB, or TBT to relay
Most regulators are meaning the power supply is also the power supply for the regulator voltmeter
In order to safely switch a feeder, the regulators must be on neutral
If a regulator is off neutral and it is impossible to move it to the neutral position, de-energize the feeder before switching out the regulator
Short circuit current is weakest in a regulator that is one step off neutral
Cutting a regulator flat allows the feeder to be supplied through the feeder position un-regulated
Primary OK TO - put slash as soon as reissued
Each Slash is for each primary OK TO on the same equipment
Authorized person can work on equipment up to alone
OK TO Work Hot on 34.5kV line
LD generates tag number
Used to limit fault current to regulator
69kV and above lines/cables – ground switches must be
closed before is issued
Voltage is regulated on a feeder according to the load center
only has reversing switch, no rotor or
Step Type Regulator
Induction regulators have 2 coils
Step type regulators have 1 coil – auto transformer
Limit switch on regulator controls
used to sense load center
voltage; line drop compensator
CMV – contact making voltmeter
At 7.5kV and below – equipment can be worked on without
grounding if difficult or dangerous
Test for voltage before
230kV Bus is grounded after a is issued
Clearance must be transferred to a second authorized person,
then grounds transferred, then clear off the first authorized
ETB does not handle hazardous waste, who handles it
LD and/or ACO
may cause total current to increase and
relays to trip