Wiring diagrams and schematics
Figure 62 . Wiring diagram for Type B VR-32 regulator and CL-7 control with differential potential transformer
Notes:
1. Portions of schematic shown in dotted enclosure is located in
regulator tank.
2. Motor resistor required for QD3 tap-changer only. Connection is
direct for QD5 and QD8 tap-changers.
3. This switch is normally closed for QD3 and normally opened for
QD5 and QD8 tap-changers.
4. The two JBB-G points shown are physically one connection point in
the junction box.
C
CT Shorting Switch
CC
Control Cable
CT
Current Transformer (Toroidal Coil)
DPT
Differential Potential Transformer
DHR
Drag Hand Reset
EST
External Source Terminals
GIB
Ground Integrated into Terminal Board
HSL
Holding Switch Lower
HSR
Holding Switch Raise
IRS
Indicator Reset Solenoid (Position
Indicator)
JB
Junction Box on the Regulator Cover
JBB
Junction Box Terminal Board
on the Cover
LLS
Lower Limit Switch (Position Indicator)
LLS
Lower Logic Switch (Tap-Changer)
LSS
Lower Safety Switch
MC
Motor Capacitor
MF
Motor Fuse
MR
Motor Resistor
NL
Neutral Light
NLS
Neutral Light Switch
PS
Power Switch
RCT
Ratio Correction Transformer
RLS
Raise Limit Switch (Position Indicator)
RLS
Raise Logic Switch (Tap-Changer)
RSS
Raise Safety Switch
SCP
Short Circuit Protection
TB
Control Terminal Board
TCB
Tap-Changer Terminal Board
V1
PT Voltage Interrupting Switch
V6
DPT Voltage Interrupting Switch
VM
Motor Voltage
VS
Sensing Voltage
VTT
Voltage Test Terminals
168
INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS
MN225003EN April 2018
CL-7 Voltage Regulator Control