S&C IntelliCap Plus, Руководство по установке

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20 S&C Instruction Sheet 1023-510
Connecting Sensors
Some controls have
var and/or neutral current or neutral voltage sensing connected in the
meter socket. Other controls use connector(s) on the bottom of the control enclosure or
terminal block J6. See Figure 11 on page 12 and Figure 19 on page 17, respectively.
NOTICE
Do not ground sensor cable shields at the top of the pole . Sensor cable shields should
be grounded only at the control end—to prevent extraneous ground current from
flowing through the cable shields . This rule applies to all S&C connectorized cables .
NOTICE
For neutral current sensing on 4-wire distribution systems, where the starpoint of the
capacitor bank is tied to the neutral and/or ground, you must install the neutral current
sensor between the starpoint and the system neutral and/or ground . See Figure 21 .
A phase
Starpoint
To capacitor control
0-10 Vac
B phase
C phase
Neutral
Fuses
Switches
Neutral current sensor
(CT terminated on an
imbedded resistor)
The neutral voltage sensing option allows the capacitor control to monitor and
take action if it detects abnormal levels of voltage on the starpoint of an ungrounded,
wye-connected bank. Use the information provided by the neutral voltage sensor manufac-
turer to design your installation. See Figure 22 on page 21.
Figure 21. Neutral current sensor installation between the starpoint and the neutral.
Installing the Capacitor Control