EarthLogger EL4+ User Manual
Page 19
Version 1.07
EarthLogger EL4+ User Manual v1.07.docx
© MRD Rail Technologies Pty Ltd
05Sep2018
COMMERCIAL IN CONFIDENCE ©2016 MRD RAIL TECHNOLOGIES PTY LTD WWW.MRD.COM.AU +61 7 3821 5151
O
N
-D
EVICE
C
ONFIGURATION
4.3.1
Menu Structures
MRD recommends that on-device configuration be limited to setting a Static IP, if required. Complete all
other configuration using the Embedded Web Server: there is greater clarity; easier; and more efficient.
4.3.2
Channel Setting Menu
Setting
Description
Allowable Values
Delay
The Delay is the time that the insulation resistance must remain below the
set value, prior to activation of the Pre-Warning or Warning alarms
2-10s
PreWarning
Non-Critical Fault insulation value - requires attention.
For safety, the pre-warning value must be above 50K
.
To set a higher value, calculate the correct value using the following
equation:
𝑃𝑊𝑉 = 𝑉
𝐵𝑢𝑠
∗ 100
𝑃𝑊𝑉
: The Pre-Warning value (
)
𝑉_𝐵𝑢𝑠
: The voltage on the measured bus (Volts). For AC,
𝑉_𝐵𝑢𝑠
should be
the peak value (=1.414 x RMS)
𝑒
.g. If RMS value of the bus voltage is 650VAC, set the pre-warning to:
𝑃𝑊𝑉 = 650 ∗ 1.414 ∗ 100
50-100k
Warning
Critical Fault insulation value - requires immediate attention.
The Warning value must be
less than
the Pre-Warning value.
Calculate the correct value using the following equation:
𝑊𝑉 = 𝑉
𝐵𝑢𝑠
∗ 50
𝑊𝑉
: The Warning value (
)
𝑉_𝐵𝑢𝑠
: The voltage on the measured bus (Volts). For AC,
𝑉_𝐵𝑢𝑠
should be
the peak value (=1.414 x RMS)
𝑒
.g. If RMS value of the bus voltage is 650VAC, set the pre-warning to:
𝑃𝑊𝑉 = 650 ∗ 1.414 ∗ 50
10-100k
&
<Pre-Warning
V-Delay
Voltage Delay is the time that the voltage must remain below the set value,
prior to activation of the Pre-Warning or Warning alarms
2
–
10s
V-PreWarning
Voltage PreWarning: Non-Critical Fault - requires attention.
The Voltage Pre-Warning alarm will activate when the measured voltage falls
below this value.
0
–
650V
V-Warning
Voltage Warning: Critical Fault - requires immediate attention.
The Warning value must be less than the Pre-Warning value.
0
–
650V
