АМ4080 is digital measuring, fully programmable device from
series 4080, designed on basis of microcontrollers. It measures
current up to 10 A AC/DC (it can measure any other current
by connecting external shunt resistor or current sensor).
AM4080 can be directly connected to current transformer with
maximum secondary current of 10 AAC. The device has potential-free
contacts for remote signalization if measured current goes
out of certain specified range (option “R”). It
is designed to be mounted on boards in control rooms of electrical
substations.
user
manual
| - (A/D) |
basic option, without any relay contacts, user menu
is not code-protected |
| A |
AC current measure |
| D |
DC current measure |
| S |
for measuring with external shunt resistor |
| E |
for measure with external current sensor (it is needed
the type of the sensor to be specified) |
| R |
there are three relay contacts that provide remote
signalization, acting when certain programmed voltage
levels are reached |
| C |
code-protected user menu |
| X |
user is not allowed to change device settings |
* - Every option can be ordered in any
combination with other options, excluding versions “A”
and “D”, which exclude each other as well as versions
“S” and “E” and versions “C”
and “X”. One of the options - “A”
or “D” must be specified.
| measurement of DC or/and AC
current |
| maximal input current |
10 АAC/ADC (overload max 10 times for 100 ms) |
| inner shunt resistance |
0.010 Ohm @ 5 AAC/ ADC; 0.005 Ohm @ 10 AAC/ ADC |
| power supply |
55-250 VAC (80-350 VDC)/ 30-270 VAC (42-380 VDC) |
| display |
super bright red, 4-digit, 76х25 mm visible, purple
filter |
| measurement error |
< 0.8 % rgd + 2 digit |
| measurement cycle |
< 1 s |
| relay contacts count |
up to 3 |
| power consumption |
< 3 W |
| work temperature |
from 0° C to 55° C |
| dimensions (H/W/D) |
48/96/85 mm or 96/96/85 mm (w/o plugs); 48/96/95 mm or 96/96/95 mm (with plugs) |
| mounting hole (H/W) |
43/90 mm or 90/90 mm quad, centered |
| protection class |
IP52 front, IP31 back |
| own weight |
320 g |
In its normal working mode AM4080 shows measured current
(referred to the primary side of current transformer if
coupled with) and continuously signalizes if the current
is in certain programmed range by light-emitting diodes
and relay contacts. If the current is out of range, the
display blinks with frequency of about 2-3Hz (blinking can
be turned off any time from user menu). The device signalizes
that measured current has gone outside range after programmed
amount of time (programmed as number of consecutive measurements
which are outside range). It is done in order to prevent
random short-time switching of the relays. Hysteresis is
also added to relay switch-off characteristics to further
improve noise characteristics of the remote signaling. If
the current goes again in the specified range plus hysteresis
current, AM4080 turns off the relays instantly without any
delay.
- nominal (primary) current
- decimal point position
- low current level
- high current level
- display blinking when Hi/Lo
- hysteresis
- delay for switching relay contacts
