Quick Reference Guide > Auxiliary Controls
Auxiliary Product Beckwith No. & Description
   
M-0121/M-0169A
Auxiliary Current Transformers
M-0121/M-0169A

M-0121 is a 5 A to 0.2 A for use with Beckwith Electric tapchanger controls when there is no additional burden present.

M-0169A is 5 A or 8.66 A to 0.2 A for use in higher burden current circuits, such as are found in paralleling schemes.

Output is protected against overvoltage.

M-0127A/M-0170A
Lower Burden Sensitive AC
Current Relays
M-0127A

M-0127A guards against damaging excessive circulating current when used on the circulating current circuit of paralleled LTC transformers.

M-0170A avoids excessive wear to the switching mechanism of LTC transformers under high load conditions.

Can be used in other current- and voltage-sensing applications.

M-0127’s adjustment range is 0.01 to 0.1 A; M-0170’s is 0.2 to
0.4 A.

M-0329B
LTC Backup Control
M-0329B
Prevents a defective LTC tapchanger control from running the voltage outside the upper and lower limits.

Prevents the line drop compensator from raising the voltage too high under full or overload conditions.

Selectable bandcenter and fixed deadband ranges allow the M-0329 to match any LTC transformer control.

Responds to a voltage excursion within 0.2 seconds.

Operates within 1% voltage accuracy.

 

M-0115A
Paralleling Balancing Module
M-0115A
Provides all the components needed to parallel an LTC transformer using the circulating current method. A circulating current sensitivity dial avoids the problems of hunting or permitting the transformers to be too many steps apart.

M-5329
Three-Phase LTC Backup Control


Regulator Controls
Transformer Controls
M-2001B Features
Auxiliary Controls
Instructions
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