EATON ELECTRICAL
15
Predictive Diagnostics
Two other inputs can accept any AC or DC signals within a specified voltage range. As
factory default, they are configured for accessory sensors providing load current,
humidity, or voltage inputs and are supplied with the device. These parameters are
important to correlate with PD signals.
1.3.13 Measurement Suspend
Frequently, measurements need to be suspended for some time. Measurements can be
suspended in three different ways:
•
Monitoring can be stopped. The operator is responsible for resuming monitoring.
•
Monitoring can be paused. In this case, monitoring will resume automatically in three
hours.
Auto-suspend mode is controlled by any of three auxiliary parameters. The device
allows the user to set low and high thresholds for three additional parameters brought to
three auxiliary inputs and enables parameter checks to comply with the thresholds. The
check can be performed to any of the parameters (configurable) and suspend
measurements, if at least one of them extends beyond the allowed boundaries.
Measurement will be automatically resumed at the next scheduled time, if parameters
will comply to allowed boundaries.
This feature is widely used to suspend measurements while monitored equipment is out
of service (load current is 0 for example). Therefore, trend calculations are not affected
by zero readings. It also allows users to perform measurements under the same
operational conditions, if required.
1.3.14 External Interfaces
InsulGard has built-in isolated RS-485 interface (RS-232 is optional). Device supports
ASCII-type and binary command protocols. Most commands and settings are supported
in both command protocols and from the device keypad. Isolated 4-20 mAmp interface
provides PDI or Magnitude levels as a percentage to Red alarm threshold. Two C-type
dry relay contacts provide Yellow and Red alarm status. One C-type dry relay contact
provides device status.
1.3.15 Software
InsulGard comes with Database InsulGard software that allows it to communicate with a
PC via a local RS-485 network or a modem. It also provides automated or manual data
downloading and storage for several devices at different locations, device setting, data
analysis, and presentation.
