K Terminal Strip Connections - Siemens MJ-XL Installation And Operation Manual

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Appendix K Terminal Strip Connections

K Terminal Strip Connections

Table K.1 below describes the connections for terminal strip P2A.
Connections for Terminal Strip P2A
Table K.1
Pin Number Signal Name
1 HS
2 U112
3 U12
4 P2
5 C2
6 E
7 E1
8 U2
9 J
10 K
11 U10
12 U11
Bold indicates standard "Polarized Disconnect Switch (PDS)" signals. For Siemens regulators, these ten signals connect to
the corresponding pins of the PDS connector block.
72
For Cooper Regulators Only. "Hold Switch" connection. Applies power to tap changer
to complete tap change after "Hold Switch" contact makes.
For Cooper Regulators Only. Neutral Position Indication. When closed to AC hot, indi-
cates tap changer is in neutral position. Turns on Neutralite.
High side of neutral position indicator. When closed to AC ground ("E"), indicates tap
changer is in neutral position. Turns on Neutralite.
Potential Transformer output (if present).
High side of Current Transformer. [C2 terminal at P3B-12 is normally externally jum-
pered to C at P3B-11.]
Neutral return for Control Panel, PT, and Utility winding. Chassis ground.
Low side of Current Transformer.
High side of Utility (Tertiary) winding. Control Panel derives "Normal" power from this
signal. Provides voltage phase reference for power flow direction.
Terminal J - Tap Changer Motor Raise signal.
Terminal K - Tap Changer Motor Lower signal.
High side of Operation Counter switch. Closes to E. Indicates when a tap change has
occurred.
High side of Regulator Drag Hands Reset solenoid. Returns to E. Used to reset the
drag hands of the Tap Position Dial mounted on the regulator.
Description
Siemens Power Transmission & Distribution, Inc.
I/O / Power
Power
Input
Input
Power/Sense
Input
Ground
Ground
Power/Sense
Output
Output
Input
Output