Bender RCM420 Series Технический бюллетень - Страница 3
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Operating and display elements
1
5
1 -
Power "ON" LED (green): Illuminates when power is received
to the unit. Flashes when the current transformer connection
alarm is active.
2 -
Alarm LED "AL1" (yellow): Alarm 1, illuminates when the set
res ponse value I
has been exceeded. Flashes when the
Δn1
current transformer connection alarm is active.
3 -
Alarm LED "AL2" (yellow): Alarm 2, illuminates when the set
response value I
has been exceeded. Flashes when the
Δn2
current transformer connection alarm is active.
4 -
Multi-functional LCD display
5 -
TEST button: Activates self-test
Arrow up key: Scrolls up inside device's menu
6 -
RESET button: Resets device
Arrow down key: Scrolls down inside device's menu
7 -
MENU key: Activates device's internal menu
Enter key: Confirm change inside device's menu
Escape key (held > 1.5 s): Goes back a step inside menu
2
3
4
6
7
Wiring diagram
Load
3
4
5
1 -
External supply voltage used to power device
a 6 A fuse recommended for internal short circuit protection.
2 -
Connection to external current transformer. All phases,
including the neutral if one exists, are placed through the
current transformer.
3 -
Alarm relay K1: programmable for I
4 -
Alarm relay K2: programmable for I
5 -
Combined external TEST and RESET button
* -
When shielded cabling is used.
Note: Do not route the ground conductor through the mea-
suring current transformer when also routing the power con-
ductors.
GND
*
2
1
/ I
/ TEST / ERROR
Δn1
Δn2
/ I
/ TEST / ERROR
Δn1
Δn2
3