EATON ELECTRICAL
9
Predictive Diagnostics
Applications
MV equipment (motors,
switchgears, generators, bus
ducts, cable terminations)
Calculated Parameters for Each PD Channel
Partial Discharge Intensity (PDI),
Pulse Repetition rate (pps), Max
Pulse magnitude (Q
02
)
Alarming Parameters
PDI, Q
02
, trend
Data Record Types
Full/Brief
Basic Type of Data
Phase-Resolved PD Distribution
PD Channel Dynamic Range
68dB
Number of Magnitude Windows (3.23 dB each)
21
Number of Phase Windows (15
0
each)
24
Power Frequency at the Monitored Object
25–120 Hz
Maximum Measured Pulse Repetition Rate
367,300pps @60Hz
306,000pps @50Hz
Self-test and Self-calibration
At powering up and before every
measurement
Allowed Coax Cable Length to a Sensor
Up to 150ft (50m)
Cable Type for PD Sensors
RG-58 or similar
1.3.2 Display, Keypad, and External Connections
InsulGard is shipped fully assembled in NEMA4 (4X) enclosure, mounted on aluminum
plate with selected communication options or in panel-mount version. These options
may include RS485/RS232 converter (Figure 2), landline (Figure 1 & 3) or cellular
modem, radio-modem (Figure 2).
Sensor Interface Board (on the left hand in Figure 2) handles all signal connections
including 15 PD channels, one noise channel and auxiliary signals. All outputs and AC
power are connected to the terminal board located on the right in Figure 2. Outputs
include 2 alarm relay contacts, device status relay contact, 4-20mAmp output and RS-
485 or RS-232 interface.
Five LEDs are placed on the front panel of the device, three for indication of alarm
status (Green, Yellow, and Red) and two for Memory and Setup operation modes.
(Figure 1)
A bright, 8-digit alphanumeric screen displays information at setup, memory mode
operation, normal operation, and all error messages. During normal operation the
display continuously scrolls the current data.
The membrane keypad has four navigation ARROW keys (
) and two function
keys (Esc and Enter), as well as two specific function keys (Set and Memory).
