36
Instruction Booklet
IB022018EN
Effective July 2020
Instructions for the installation and
EATON
www.eaton.com
1.7 Voltage detection system
1.7.1 Connecting the voltage detection system cables to
ground
m
CAUTION
FAILURE TO EFFECTIVELY GROUND VOLTAGE DETECTING CABLES L1, L2,
L3 PRIOR TO POWER FREQUENCY WITHSTAND VOLTAGE TESTING OR VLF
VOLTAGE TESTING COULD RESULT IN PERSONAL INJURY OR EQUIPMENT
DAMAGE.
The Voltage Detection System is equipped with four ports at the
front of the device to measure the detected voltage from the
bushings. Three ports are for L1, L2, and L3 voltages, and the fourth
port is a ground connection.
The following procedure must be followed before performing any
power frequency withstand voltage testing or VLF voltage testing:
•
Ensure that the voltage detection cables and the ground wire are
securely connected behind the VDS device.
•
Using three wires that are terminated with banana jack at each
end, connect the first wire between L1 port and the ground port,
connect the second wire between L2 and the ground port and
connect the third wire between L3 and the ground port as shown
in
•
After performing the voltage test and before energizing the
switchgear for normal service, remove the three wires from the
front of the voltage detecting device.
Figure 66. VDS grounding.
A voltage detection system is included as standard for detecting
cable side voltages on all three phases. The voltage detection
device is mounted on the XGIS front panel face and operates in
accordance with IEC 61243-5 (integrated voltage detection systems).
This system looks for the presence of voltage in each of the three
phases and indicates the line status using LED display symbols on
the device display.
Since the cable compartment cable connectors include a capacitance
test port for voltage detection, the VDS uses capacitance coupled
voltage division to safely detect signals proportional to the high
voltage present on the connected cables. In accordance with IEC
61243-5, the VDS will indicate voltage present when the input
signal current corresponds to 45 - 120% of nominal voltage, and will
indicate voltage absent for input current signals corresponding to
line-to-earth voltage <10% of nominal voltage, where line-to-earth is
defined as nominal voltage / √3.
While VDS is provided as standard on the cable side connections,
it is also available as an option on other parts of the XGIS power
circuitry.
The VDS LCD display shows, for each phase, voltage present or
absent as follows:
Table 6. VDS LCD display performance
Condition
Action
10% x nominal < Input < 45% x nominal
display
Input > 45% x nominal
display normally
Input < 10% x nominal
no display
The VDS includes two interlock outputs that can be connected into
permissive logic for operation of the circuit breaker. These contacts
perform as follows:
Table 7. VDS relay output performance
Condition
Action
Phase voltage > 0.1 x nominal voltage
(control voltage present)
Relay 1 on
Phase voltage < 0.1 x nominal voltage
(control voltage present)
Relay 2 on
Control voltage absent
Relay 1 and Relay 2 off
Earth fault (asymmetry)
Relay 1 and Relay 2 on
The standard VDS for cable side voltage detection is the Peaks
CVD10.
shows the panel-mount instrument face of the
VDS.
Figure 67. Cable side voltage detection system.
