ISOLGUARD HIG93, HIG93/L, HIG94
V5.8/23
HAKEL spol. s r.o. Hradec Králové
www.hakel.com
Page 5 / 15
3. HIG93, HIG93/L, HIG94
controls and connecting terminals
Green indicator lamp ON
This control lights up when the device is ON (powered). It glimmers slightly after module
activation.
Yellow indicator lamp FAULT1
The light indicates
FAULT1
, when the measured insulation resistance value is lower than the
set critical resistance
R
crit1
value. It even lights after the fault status removal, if the fault
memory function is active. At the same time, this status is signalled by the
FAULT1
relay
contacts.
Yellow indicator lamp FAULT2
The light indicates
FAULT2
, when the measured insulation resistance value is lower than the
set critical resistance
R
crit2
. It even lights after the fault status removal, if the fault memory
function is active. At the same time, this status is signalled by the
FAULT2
relay contacts.
Display
It serves to display the measured values, to show current function of the S1 – S3 pushbuttons,
to set the parameters and to display information. For description of displayed information,
see chapter
Information on the display
, page 8.
FAULT1
or
FAULT2
relay status change, eventually starting and ending device test, is
signalled by short display flash.
The display goes off if no button is pressed for 5 minutes and is again restored by pressing
any button. The insulation monitoring device is operational even if the display is not active.
Left push-button S1
This is a module control button whose meaning in each menu is shown on the display. When
the insulation resistance
R
isol
is displayed, this button has the meaning of
TEST
push-button.
See chapter
Information on the display
, page 8.
Middle push-button S2
This is a module control button whose meaning in each menu is shown on the display. It releases the relay
FAULT
, when the
fault memory function is active. It activates display of temperature inside the module if the insulation resistance value
R
isol
is
displayed.
Right push-button S3 MENU
This is a module control button whose meaning in each menu is shown on the display. When the insulation resistance
R
isol
is
viewed, it activates the parameter setting menu.
Within the parameters setting menu, the prolonged pressing of this push-button terminates the data entering with memorizing
the new value, whereas the short pressing of this push-button causes exit from the menu without memorizing the new
parameter value.
Terminals A1, A2
These terminals serve to connect the module’s power supply. The power supply voltage is 90 to 265 V AC (47 ÷ 440 Hz) or
90 to 370 V DC.
Terminals CENTRE, PE
Input terminals for the insulation resistance measurement, see recommended connections of the insulation monitoring device.
If the monitoring of IT power supply system with voltage higher than 275 V AC (without brought-out neutral conductor) is
required, it is necessary to create an artificial centre using TL inductors. Such a created neutral is connected to the
CENTRE
terminal. The value of external inductor DC resistance is set within the Parameters setting menu.
Terminals of the signalling relay FAULT1 230 V AC /1 A
Terminals of the signalling relay FAULT2 230 V AC /1 A
Potential-free switching relay contact for signalling the status of the monitored IT power supply system.
FAULT1
and
FAULT2
relay status when insulation status fault occurs is determined by the setting of
Set Relay FA
parameter.
This parameter can be set to one of two values
N/C
and
N/O
.
The signalling is performed as follows when parameter
Set Relay FA
is set to
N/C
value:
Relay
FAULT1 (FAULT2)
is released
, when the device is connected to the power supply, is functional (the indicator lamp ON
glimmers slightly) and insulation status
fault
FAULT1
(
FAULT2
)
is not indicated
. The insulation resistance of the monitored
system is higher than the set critical value
R
crit1
(
R
crit2
).
The signalling is performed as follows when parameter
Set Relay FA
is set to
N/O
value:
Relay
FAULT1 (FAULT2)
is released
, when the device is connected to the power supply, is functional (the indicator lamp ON
glimmers slightly) and insulation status
fault
FAULT1
(
FAULT2
)
is indicated
.
A
B
SH
RS485
C
E
N
T
R
E
+
1
2V
A
1
A
2
P
E
T
E
S
T
MENU
Display
230VAC/1A
ON
FAULT2
FAULT1
HIG93
∻
5 900 kΩ
S1
S2
S3
HAKEL
ISOLGUARD
SH
B
A
230VAC/1A
FAULT2
FAULT1
1
2
3
4
5
6
Picture 1: Terminals designation
